From f50cd2b2f5369a5c94714eaaac6b31093e60d502 Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Sun, 7 Feb 2016 18:36:57 +0100 Subject: build-sys: move coredump logic into subdir of its own --- Makefile.am | 20 +- src/coredump/Makefile | 1 + src/coredump/coredump-vacuum.c | 268 +++++++++++ src/coredump/coredump-vacuum.h | 25 + src/coredump/coredump.c | 880 ++++++++++++++++++++++++++++++++++++ src/coredump/coredump.conf | 21 + src/coredump/coredumpctl.c | 880 ++++++++++++++++++++++++++++++++++++ src/coredump/stacktrace.c | 200 ++++++++ src/coredump/stacktrace.h | 22 + src/coredump/test-coredump-vacuum.c | 30 ++ src/journal/coredump-vacuum.c | 268 ----------- src/journal/coredump-vacuum.h | 25 - src/journal/coredump.c | 880 ------------------------------------ src/journal/coredump.conf | 21 - src/journal/coredumpctl.c | 880 ------------------------------------ src/journal/stacktrace.c | 200 -------- src/journal/stacktrace.h | 22 - src/journal/test-coredump-vacuum.c | 30 -- 18 files changed, 2337 insertions(+), 2336 deletions(-) create mode 120000 src/coredump/Makefile create mode 100644 src/coredump/coredump-vacuum.c create mode 100644 src/coredump/coredump-vacuum.h create mode 100644 src/coredump/coredump.c create mode 100644 src/coredump/coredump.conf create mode 100644 src/coredump/coredumpctl.c create mode 100644 src/coredump/stacktrace.c create mode 100644 src/coredump/stacktrace.h create mode 100644 src/coredump/test-coredump-vacuum.c delete mode 100644 src/journal/coredump-vacuum.c delete mode 100644 src/journal/coredump-vacuum.h delete mode 100644 src/journal/coredump.c delete mode 100644 src/journal/coredump.conf delete mode 100644 src/journal/coredumpctl.c delete mode 100644 src/journal/stacktrace.c delete mode 100644 src/journal/stacktrace.h delete mode 100644 src/journal/test-coredump-vacuum.c diff --git a/Makefile.am b/Makefile.am index 84f8593ba7..1e3eb4deed 100644 --- a/Makefile.am +++ b/Makefile.am @@ -4397,17 +4397,17 @@ systemd_socket_proxyd_LDADD = \ # ------------------------------------------------------------------------------ if ENABLE_COREDUMP systemd_coredump_SOURCES = \ - src/journal/coredump.c \ - src/journal/coredump-vacuum.c \ - src/journal/coredump-vacuum.h + src/coredump/coredump.c \ + src/coredump/coredump-vacuum.c \ + src/coredump/coredump-vacuum.h systemd_coredump_LDADD = \ libshared.la if HAVE_ELFUTILS systemd_coredump_SOURCES += \ - src/journal/stacktrace.c \ - src/journal/stacktrace.h + src/coredump/stacktrace.c \ + src/coredump/stacktrace.h systemd_coredump_LDADD += \ $(ELFUTILS_LIBS) @@ -4417,10 +4417,10 @@ rootlibexec_PROGRAMS += \ systemd-coredump dist_pkgsysconf_DATA += \ - src/journal/coredump.conf + src/coredump/coredump.conf coredumpctl_SOURCES = \ - src/journal/coredumpctl.c + src/coredump/coredumpctl.c coredumpctl_LDADD = \ libshared.la @@ -4432,9 +4432,9 @@ manual_tests += \ test-coredump-vacuum test_coredump_vacuum_SOURCES = \ - src/journal/test-coredump-vacuum.c \ - src/journal/coredump-vacuum.c \ - src/journal/coredump-vacuum.h + src/coredump/test-coredump-vacuum.c \ + src/coredump/coredump-vacuum.c \ + src/coredump/coredump-vacuum.h test_coredump_vacuum_LDADD = \ libshared.la diff --git a/src/coredump/Makefile b/src/coredump/Makefile new file mode 120000 index 0000000000..d0b0e8e008 --- /dev/null +++ b/src/coredump/Makefile @@ -0,0 +1 @@ +../Makefile \ No newline at end of file diff --git a/src/coredump/coredump-vacuum.c b/src/coredump/coredump-vacuum.c new file mode 100644 index 0000000000..f02b6dbd87 --- /dev/null +++ b/src/coredump/coredump-vacuum.c @@ -0,0 +1,268 @@ +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include + +#include "alloc-util.h" +#include "coredump-vacuum.h" +#include "dirent-util.h" +#include "fd-util.h" +#include "hashmap.h" +#include "macro.h" +#include "string-util.h" +#include "time-util.h" +#include "user-util.h" +#include "util.h" + +#define DEFAULT_MAX_USE_LOWER (uint64_t) (1ULL*1024ULL*1024ULL) /* 1 MiB */ +#define DEFAULT_MAX_USE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ +#define DEFAULT_KEEP_FREE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ +#define DEFAULT_KEEP_FREE (uint64_t) (1024ULL*1024ULL) /* 1 MB */ + +struct vacuum_candidate { + unsigned n_files; + char *oldest_file; + usec_t oldest_mtime; +}; + +static void vacuum_candidate_free(struct vacuum_candidate *c) { + if (!c) + return; + + free(c->oldest_file); + free(c); +} + +DEFINE_TRIVIAL_CLEANUP_FUNC(struct vacuum_candidate*, vacuum_candidate_free); + +static void vacuum_candidate_hasmap_free(Hashmap *h) { + struct vacuum_candidate *c; + + while ((c = hashmap_steal_first(h))) + vacuum_candidate_free(c); + + hashmap_free(h); +} + +DEFINE_TRIVIAL_CLEANUP_FUNC(Hashmap*, vacuum_candidate_hasmap_free); + +static int uid_from_file_name(const char *filename, uid_t *uid) { + const char *p, *e, *u; + + p = startswith(filename, "core."); + if (!p) + return -EINVAL; + + /* Skip the comm field */ + p = strchr(p, '.'); + if (!p) + return -EINVAL; + p++; + + /* Find end up UID */ + e = strchr(p, '.'); + if (!e) + return -EINVAL; + + u = strndupa(p, e-p); + return parse_uid(u, uid); +} + +static bool vacuum_necessary(int fd, uint64_t sum, uint64_t keep_free, uint64_t max_use) { + uint64_t fs_size = 0, fs_free = (uint64_t) -1; + struct statvfs sv; + + assert(fd >= 0); + + if (fstatvfs(fd, &sv) >= 0) { + fs_size = sv.f_frsize * sv.f_blocks; + fs_free = sv.f_frsize * sv.f_bfree; + } + + if (max_use == (uint64_t) -1) { + + if (fs_size > 0) { + max_use = PAGE_ALIGN(fs_size / 10); /* 10% */ + + if (max_use > DEFAULT_MAX_USE_UPPER) + max_use = DEFAULT_MAX_USE_UPPER; + + if (max_use < DEFAULT_MAX_USE_LOWER) + max_use = DEFAULT_MAX_USE_LOWER; + } else + max_use = DEFAULT_MAX_USE_LOWER; + } else + max_use = PAGE_ALIGN(max_use); + + if (max_use > 0 && sum > max_use) + return true; + + if (keep_free == (uint64_t) -1) { + + if (fs_size > 0) { + keep_free = PAGE_ALIGN((fs_size * 3) / 20); /* 15% */ + + if (keep_free > DEFAULT_KEEP_FREE_UPPER) + keep_free = DEFAULT_KEEP_FREE_UPPER; + } else + keep_free = DEFAULT_KEEP_FREE; + } else + keep_free = PAGE_ALIGN(keep_free); + + if (keep_free > 0 && fs_free < keep_free) + return true; + + return false; +} + +int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use) { + _cleanup_closedir_ DIR *d = NULL; + struct stat exclude_st; + int r; + + if (keep_free == 0 && max_use == 0) + return 0; + + if (exclude_fd >= 0) { + if (fstat(exclude_fd, &exclude_st) < 0) + return log_error_errno(errno, "Failed to fstat(): %m"); + } + + /* This algorithm will keep deleting the oldest file of the + * user with the most coredumps until we are back in the size + * limits. Note that vacuuming for journal files is different, + * because we rely on rate-limiting of the messages there, + * to avoid being flooded. */ + + d = opendir("/var/lib/systemd/coredump"); + if (!d) { + if (errno == ENOENT) + return 0; + + return log_error_errno(errno, "Can't open coredump directory: %m"); + } + + for (;;) { + _cleanup_(vacuum_candidate_hasmap_freep) Hashmap *h = NULL; + struct vacuum_candidate *worst = NULL; + struct dirent *de; + uint64_t sum = 0; + + rewinddir(d); + + FOREACH_DIRENT(de, d, goto fail) { + struct vacuum_candidate *c; + struct stat st; + uid_t uid; + usec_t t; + + r = uid_from_file_name(de->d_name, &uid); + if (r < 0) + continue; + + if (fstatat(dirfd(d), de->d_name, &st, AT_NO_AUTOMOUNT|AT_SYMLINK_NOFOLLOW) < 0) { + if (errno == ENOENT) + continue; + + log_warning_errno(errno, "Failed to stat /var/lib/systemd/coredump/%s: %m", de->d_name); + continue; + } + + if (!S_ISREG(st.st_mode)) + continue; + + if (exclude_fd >= 0 && + exclude_st.st_dev == st.st_dev && + exclude_st.st_ino == st.st_ino) + continue; + + r = hashmap_ensure_allocated(&h, NULL); + if (r < 0) + return log_oom(); + + t = timespec_load(&st.st_mtim); + + c = hashmap_get(h, UID_TO_PTR(uid)); + if (c) { + + if (t < c->oldest_mtime) { + char *n; + + n = strdup(de->d_name); + if (!n) + return log_oom(); + + free(c->oldest_file); + c->oldest_file = n; + c->oldest_mtime = t; + } + + } else { + _cleanup_(vacuum_candidate_freep) struct vacuum_candidate *n = NULL; + + n = new0(struct vacuum_candidate, 1); + if (!n) + return log_oom(); + + n->oldest_file = strdup(de->d_name); + if (!n->oldest_file) + return log_oom(); + + n->oldest_mtime = t; + + r = hashmap_put(h, UID_TO_PTR(uid), n); + if (r < 0) + return log_oom(); + + c = n; + n = NULL; + } + + c->n_files++; + + if (!worst || + worst->n_files < c->n_files || + (worst->n_files == c->n_files && c->oldest_mtime < worst->oldest_mtime)) + worst = c; + + sum += st.st_blocks * 512; + } + + if (!worst) + break; + + r = vacuum_necessary(dirfd(d), sum, keep_free, max_use); + if (r <= 0) + return r; + + if (unlinkat(dirfd(d), worst->oldest_file, 0) < 0) { + + if (errno == ENOENT) + continue; + + return log_error_errno(errno, "Failed to remove file %s: %m", worst->oldest_file); + } else + log_info("Removed old coredump %s.", worst->oldest_file); + } + + return 0; + +fail: + return log_error_errno(errno, "Failed to read directory: %m"); +} diff --git a/src/coredump/coredump-vacuum.h b/src/coredump/coredump-vacuum.h new file mode 100644 index 0000000000..4b7b9f2d98 --- /dev/null +++ b/src/coredump/coredump-vacuum.h @@ -0,0 +1,25 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include + +int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use); diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c new file mode 100644 index 0000000000..8b1c670cc6 --- /dev/null +++ b/src/coredump/coredump.c @@ -0,0 +1,880 @@ +/*** + This file is part of systemd. + + Copyright 2012 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include +#include +#include +#include + +#ifdef HAVE_ELFUTILS +# include +# include +#endif + +#include "sd-journal.h" +#include "sd-login.h" + +#include "acl-util.h" +#include "alloc-util.h" +#include "capability-util.h" +#include "cgroup-util.h" +#include "compress.h" +#include "conf-parser.h" +#include "copy.h" +#include "coredump-vacuum.h" +#include "dirent-util.h" +#include "escape.h" +#include "fd-util.h" +#include "fileio.h" +#include "fs-util.h" +#include "io-util.h" +#include "journald-native.h" +#include "log.h" +#include "macro.h" +#include "mkdir.h" +#include "parse-util.h" +#include "process-util.h" +#include "special.h" +#include "stacktrace.h" +#include "string-table.h" +#include "string-util.h" +#include "strv.h" +#include "user-util.h" +#include "util.h" + +/* The maximum size up to which we process coredumps */ +#define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) + +/* The maximum size up to which we leave the coredump around on + * disk */ +#define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX + +/* The maximum size up to which we store the coredump in the + * journal */ +#define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) + +/* Make sure to not make this larger than the maximum journal entry + * size. See DATA_SIZE_MAX in journald-native.c. */ +assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); + +enum { + INFO_PID, + INFO_UID, + INFO_GID, + INFO_SIGNAL, + INFO_TIMESTAMP, + INFO_COMM, + INFO_EXE, + _INFO_LEN +}; + +typedef enum CoredumpStorage { + COREDUMP_STORAGE_NONE, + COREDUMP_STORAGE_EXTERNAL, + COREDUMP_STORAGE_JOURNAL, + COREDUMP_STORAGE_BOTH, + _COREDUMP_STORAGE_MAX, + _COREDUMP_STORAGE_INVALID = -1 +} CoredumpStorage; + +static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { + [COREDUMP_STORAGE_NONE] = "none", + [COREDUMP_STORAGE_EXTERNAL] = "external", + [COREDUMP_STORAGE_JOURNAL] = "journal", + [COREDUMP_STORAGE_BOTH] = "both", +}; + +DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); +static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); + +static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; +static bool arg_compress = true; +static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; +static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; +static size_t arg_journal_size_max = JOURNAL_SIZE_MAX; +static uint64_t arg_keep_free = (uint64_t) -1; +static uint64_t arg_max_use = (uint64_t) -1; + +static int parse_config(void) { + static const ConfigTableItem items[] = { + { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, + { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, + { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, + { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, + { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, + { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, + { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, + {} + }; + + return config_parse_many(PKGSYSCONFDIR "/coredump.conf", + CONF_PATHS_NULSTR("systemd/coredump.conf.d"), + "Coredump\0", + config_item_table_lookup, items, + false, NULL); +} + +static int fix_acl(int fd, uid_t uid) { + +#ifdef HAVE_ACL + _cleanup_(acl_freep) acl_t acl = NULL; + acl_entry_t entry; + acl_permset_t permset; + int r; + + assert(fd >= 0); + + if (uid <= SYSTEM_UID_MAX) + return 0; + + /* Make sure normal users can read (but not write or delete) + * their own coredumps */ + + acl = acl_get_fd(fd); + if (!acl) + return log_error_errno(errno, "Failed to get ACL: %m"); + + if (acl_create_entry(&acl, &entry) < 0 || + acl_set_tag_type(entry, ACL_USER) < 0 || + acl_set_qualifier(entry, &uid) < 0) { + log_error_errno(errno, "Failed to patch ACL: %m"); + return -errno; + } + + if (acl_get_permset(entry, &permset) < 0 || + acl_add_perm(permset, ACL_READ) < 0) + return log_warning_errno(errno, "Failed to patch ACL: %m"); + + r = calc_acl_mask_if_needed(&acl); + if (r < 0) + return log_warning_errno(r, "Failed to patch ACL: %m"); + + if (acl_set_fd(fd, acl) < 0) + return log_error_errno(errno, "Failed to apply ACL: %m"); +#endif + + return 0; +} + +static int fix_xattr(int fd, const char *info[_INFO_LEN]) { + + static const char * const xattrs[_INFO_LEN] = { + [INFO_PID] = "user.coredump.pid", + [INFO_UID] = "user.coredump.uid", + [INFO_GID] = "user.coredump.gid", + [INFO_SIGNAL] = "user.coredump.signal", + [INFO_TIMESTAMP] = "user.coredump.timestamp", + [INFO_COMM] = "user.coredump.comm", + [INFO_EXE] = "user.coredump.exe", + }; + + int r = 0; + unsigned i; + + assert(fd >= 0); + + /* Attach some metadata to coredumps via extended + * attributes. Just because we can. */ + + for (i = 0; i < _INFO_LEN; i++) { + int k; + + if (isempty(info[i]) || !xattrs[i]) + continue; + + k = fsetxattr(fd, xattrs[i], info[i], strlen(info[i]), XATTR_CREATE); + if (k < 0 && r == 0) + r = -errno; + } + + return r; +} + +#define filename_escape(s) xescape((s), "./ ") + +static int fix_permissions( + int fd, + const char *filename, + const char *target, + const char *info[_INFO_LEN], + uid_t uid) { + + assert(fd >= 0); + assert(filename); + assert(target); + assert(info); + + /* Ignore errors on these */ + fchmod(fd, 0640); + fix_acl(fd, uid); + fix_xattr(fd, info); + + if (fsync(fd) < 0) + return log_error_errno(errno, "Failed to sync coredump %s: %m", filename); + + if (rename(filename, target) < 0) + return log_error_errno(errno, "Failed to rename coredump %s -> %s: %m", filename, target); + + return 0; +} + +static int maybe_remove_external_coredump(const char *filename, uint64_t size) { + + /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ + + if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) && + size <= arg_external_size_max) + return 0; + + if (!filename) + return 1; + + if (unlink(filename) < 0 && errno != ENOENT) + return log_error_errno(errno, "Failed to unlink %s: %m", filename); + + return 1; +} + +static int make_filename(const char *info[_INFO_LEN], char **ret) { + _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; + sd_id128_t boot = {}; + int r; + + assert(info); + + c = filename_escape(info[INFO_COMM]); + if (!c) + return -ENOMEM; + + u = filename_escape(info[INFO_UID]); + if (!u) + return -ENOMEM; + + r = sd_id128_get_boot(&boot); + if (r < 0) + return r; + + p = filename_escape(info[INFO_PID]); + if (!p) + return -ENOMEM; + + t = filename_escape(info[INFO_TIMESTAMP]); + if (!t) + return -ENOMEM; + + if (asprintf(ret, + "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", + c, + u, + SD_ID128_FORMAT_VAL(boot), + p, + t) < 0) + return -ENOMEM; + + return 0; +} + +static int save_external_coredump( + const char *info[_INFO_LEN], + uid_t uid, + char **ret_filename, + int *ret_node_fd, + int *ret_data_fd, + uint64_t *ret_size) { + + _cleanup_free_ char *fn = NULL, *tmp = NULL; + _cleanup_close_ int fd = -1; + struct stat st; + int r; + + assert(info); + assert(ret_filename); + assert(ret_node_fd); + assert(ret_data_fd); + assert(ret_size); + + r = make_filename(info, &fn); + if (r < 0) + return log_error_errno(r, "Failed to determine coredump file name: %m"); + + r = tempfn_random(fn, NULL, &tmp); + if (r < 0) + return log_error_errno(r, "Failed to determine temporary file name: %m"); + + mkdir_p_label("/var/lib/systemd/coredump", 0755); + + fd = open(tmp, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640); + if (fd < 0) + return log_error_errno(errno, "Failed to create coredump file %s: %m", tmp); + + r = copy_bytes(STDIN_FILENO, fd, arg_process_size_max, false); + if (r == -EFBIG) { + log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", info[INFO_PID], info[INFO_COMM]); + goto fail; + } else if (IN_SET(r, -EDQUOT, -ENOSPC)) { + log_error("Not enough disk space for coredump of %s (%s), refusing.", info[INFO_PID], info[INFO_COMM]); + goto fail; + } else if (r < 0) { + log_error_errno(r, "Failed to dump coredump to file: %m"); + goto fail; + } + + if (fstat(fd, &st) < 0) { + log_error_errno(errno, "Failed to fstat coredump %s: %m", tmp); + goto fail; + } + + if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { + log_error_errno(errno, "Failed to seek on %s: %m", tmp); + goto fail; + } + +#if defined(HAVE_XZ) || defined(HAVE_LZ4) + /* If we will remove the coredump anyway, do not compress. */ + if (maybe_remove_external_coredump(NULL, st.st_size) == 0 + && arg_compress) { + + _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; + _cleanup_close_ int fd_compressed = -1; + + fn_compressed = strappend(fn, COMPRESSED_EXT); + if (!fn_compressed) { + log_oom(); + goto uncompressed; + } + + r = tempfn_random(fn_compressed, NULL, &tmp_compressed); + if (r < 0) { + log_error_errno(r, "Failed to determine temporary file name for %s: %m", fn_compressed); + goto uncompressed; + } + + fd_compressed = open(tmp_compressed, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640); + if (fd_compressed < 0) { + log_error_errno(errno, "Failed to create file %s: %m", tmp_compressed); + goto uncompressed; + } + + r = compress_stream(fd, fd_compressed, -1); + if (r < 0) { + log_error_errno(r, "Failed to compress %s: %m", tmp_compressed); + goto fail_compressed; + } + + r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, info, uid); + if (r < 0) + goto fail_compressed; + + /* OK, this worked, we can get rid of the uncompressed version now */ + unlink_noerrno(tmp); + + *ret_filename = fn_compressed; /* compressed */ + *ret_node_fd = fd_compressed; /* compressed */ + *ret_data_fd = fd; /* uncompressed */ + *ret_size = (uint64_t) st.st_size; /* uncompressed */ + + fn_compressed = NULL; + fd = fd_compressed = -1; + + return 0; + + fail_compressed: + unlink_noerrno(tmp_compressed); + } + +uncompressed: +#endif + + r = fix_permissions(fd, tmp, fn, info, uid); + if (r < 0) + goto fail; + + *ret_filename = fn; + *ret_data_fd = fd; + *ret_node_fd = -1; + *ret_size = (uint64_t) st.st_size; + + fn = NULL; + fd = -1; + + return 0; + +fail: + unlink_noerrno(tmp); + return r; +} + +static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { + _cleanup_free_ char *field = NULL; + ssize_t n; + + assert(fd >= 0); + assert(ret); + assert(ret_size); + + if (lseek(fd, 0, SEEK_SET) == (off_t) -1) + return log_warning_errno(errno, "Failed to seek: %m"); + + field = malloc(9 + size); + if (!field) { + log_warning("Failed to allocate memory for coredump, coredump will not be stored."); + return -ENOMEM; + } + + memcpy(field, "COREDUMP=", 9); + + n = read(fd, field + 9, size); + if (n < 0) + return log_error_errno((int) n, "Failed to read core data: %m"); + if ((size_t) n < size) { + log_error("Core data too short."); + return -EIO; + } + + *ret = field; + *ret_size = size + 9; + + field = NULL; + + return 0; +} + +/* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: + * 0:/dev/pts/23 + * pos: 0 + * flags: 0100002 + * + * 1:/dev/pts/23 + * pos: 0 + * flags: 0100002 + * + * 2:/dev/pts/23 + * pos: 0 + * flags: 0100002 + * EOF + */ +static int compose_open_fds(pid_t pid, char **open_fds) { + _cleanup_closedir_ DIR *proc_fd_dir = NULL; + _cleanup_close_ int proc_fdinfo_fd = -1; + _cleanup_free_ char *buffer = NULL; + _cleanup_fclose_ FILE *stream = NULL; + const char *fddelim = "", *path; + struct dirent *dent = NULL; + size_t size = 0; + int r = 0; + + assert(pid >= 0); + assert(open_fds != NULL); + + path = procfs_file_alloca(pid, "fd"); + proc_fd_dir = opendir(path); + if (!proc_fd_dir) + return -errno; + + proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); + if (proc_fdinfo_fd < 0) + return -errno; + + stream = open_memstream(&buffer, &size); + if (!stream) + return -ENOMEM; + + FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { + _cleanup_fclose_ FILE *fdinfo = NULL; + _cleanup_free_ char *fdname = NULL; + char line[LINE_MAX]; + int fd; + + r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); + if (r < 0) + return r; + + fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); + fddelim = "\n"; + + /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ + fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); + if (fd < 0) + continue; + + fdinfo = fdopen(fd, "re"); + if (fdinfo == NULL) { + close(fd); + continue; + } + + FOREACH_LINE(line, fdinfo, break) { + fputs(line, stream); + if (!endswith(line, "\n")) + fputc('\n', stream); + } + } + + errno = 0; + stream = safe_fclose(stream); + + if (errno > 0) + return -errno; + + *open_fds = buffer; + buffer = NULL; + + return 0; +} + +int main(int argc, char* argv[]) { + + /* The small core field we allocate on the stack, to keep things simple */ + char + *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL, + *core_session = NULL, *core_exe = NULL, *core_comm = NULL, *core_cmdline = NULL, + *core_cgroup = NULL, *core_cwd = NULL, *core_root = NULL, *core_unit = NULL, + *core_slice = NULL; + + /* The larger ones we allocate on the heap */ + _cleanup_free_ char + *core_timestamp = NULL, *core_message = NULL, *coredump_data = NULL, *core_owner_uid = NULL, + *core_open_fds = NULL, *core_proc_status = NULL, *core_proc_maps = NULL, *core_proc_limits = NULL, + *core_proc_cgroup = NULL, *core_environ = NULL; + + _cleanup_free_ char *exe = NULL, *comm = NULL, *filename = NULL; + const char *info[_INFO_LEN]; + + _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; + + struct iovec iovec[26]; + uint64_t coredump_size; + int r, j = 0; + uid_t uid, owner_uid; + gid_t gid; + pid_t pid; + char *t; + const char *p; + + /* Make sure we never enter a loop */ + prctl(PR_SET_DUMPABLE, 0); + + /* First, log to a safe place, since we don't know what + * crashed and it might be journald which we'd rather not log + * to then. */ + log_set_target(LOG_TARGET_KMSG); + log_open(); + + if (argc < INFO_COMM + 1) { + log_error("Not enough arguments passed from kernel (%d, expected %d).", + argc - 1, INFO_COMM + 1 - 1); + r = -EINVAL; + goto finish; + } + + /* Ignore all parse errors */ + parse_config(); + + log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); + log_debug("Selected compression %s.", yes_no(arg_compress)); + + r = parse_uid(argv[INFO_UID + 1], &uid); + if (r < 0) { + log_error("Failed to parse UID."); + goto finish; + } + + r = parse_pid(argv[INFO_PID + 1], &pid); + if (r < 0) { + log_error("Failed to parse PID."); + goto finish; + } + + r = parse_gid(argv[INFO_GID + 1], &gid); + if (r < 0) { + log_error("Failed to parse GID."); + goto finish; + } + + if (get_process_comm(pid, &comm) < 0) { + log_warning("Failed to get COMM, falling back to the command line."); + comm = strv_join(argv + INFO_COMM + 1, " "); + } + + if (get_process_exe(pid, &exe) < 0) + log_warning("Failed to get EXE."); + + info[INFO_PID] = argv[INFO_PID + 1]; + info[INFO_UID] = argv[INFO_UID + 1]; + info[INFO_GID] = argv[INFO_GID + 1]; + info[INFO_SIGNAL] = argv[INFO_SIGNAL + 1]; + info[INFO_TIMESTAMP] = argv[INFO_TIMESTAMP + 1]; + info[INFO_COMM] = comm; + info[INFO_EXE] = exe; + + if (cg_pid_get_unit(pid, &t) >= 0) { + + if (streq(t, SPECIAL_JOURNALD_SERVICE)) { + free(t); + + /* If we are journald, we cut things short, + * don't write to the journal, but still + * create a coredump. */ + + if (arg_storage != COREDUMP_STORAGE_NONE) + arg_storage = COREDUMP_STORAGE_EXTERNAL; + + r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); + if (r < 0) + goto finish; + + r = maybe_remove_external_coredump(filename, coredump_size); + if (r < 0) + goto finish; + + log_info("Detected coredump of the journal daemon itself, diverted to %s.", filename); + goto finish; + } + + core_unit = strjoina("COREDUMP_UNIT=", t); + free(t); + + } else if (cg_pid_get_user_unit(pid, &t) >= 0) { + core_unit = strjoina("COREDUMP_USER_UNIT=", t); + free(t); + } + + if (core_unit) + IOVEC_SET_STRING(iovec[j++], core_unit); + + /* OK, now we know it's not the journal, hence we can make use + * of it now. */ + log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); + log_open(); + + core_pid = strjoina("COREDUMP_PID=", info[INFO_PID]); + IOVEC_SET_STRING(iovec[j++], core_pid); + + core_uid = strjoina("COREDUMP_UID=", info[INFO_UID]); + IOVEC_SET_STRING(iovec[j++], core_uid); + + core_gid = strjoina("COREDUMP_GID=", info[INFO_GID]); + IOVEC_SET_STRING(iovec[j++], core_gid); + + core_signal = strjoina("COREDUMP_SIGNAL=", info[INFO_SIGNAL]); + IOVEC_SET_STRING(iovec[j++], core_signal); + + if (sd_pid_get_session(pid, &t) >= 0) { + core_session = strjoina("COREDUMP_SESSION=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_session); + } + + if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { + r = asprintf(&core_owner_uid, + "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); + if (r > 0) + IOVEC_SET_STRING(iovec[j++], core_owner_uid); + } + + if (sd_pid_get_slice(pid, &t) >= 0) { + core_slice = strjoina("COREDUMP_SLICE=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_slice); + } + + if (comm) { + core_comm = strjoina("COREDUMP_COMM=", comm); + IOVEC_SET_STRING(iovec[j++], core_comm); + } + + if (exe) { + core_exe = strjoina("COREDUMP_EXE=", exe); + IOVEC_SET_STRING(iovec[j++], core_exe); + } + + if (get_process_cmdline(pid, 0, false, &t) >= 0) { + core_cmdline = strjoina("COREDUMP_CMDLINE=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_cmdline); + } + + if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { + core_cgroup = strjoina("COREDUMP_CGROUP=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_cgroup); + } + + if (compose_open_fds(pid, &t) >= 0) { + core_open_fds = strappend("COREDUMP_OPEN_FDS=", t); + free(t); + + if (core_open_fds) + IOVEC_SET_STRING(iovec[j++], core_open_fds); + } + + p = procfs_file_alloca(pid, "status"); + if (read_full_file(p, &t, NULL) >= 0) { + core_proc_status = strappend("COREDUMP_PROC_STATUS=", t); + free(t); + + if (core_proc_status) + IOVEC_SET_STRING(iovec[j++], core_proc_status); + } + + p = procfs_file_alloca(pid, "maps"); + if (read_full_file(p, &t, NULL) >= 0) { + core_proc_maps = strappend("COREDUMP_PROC_MAPS=", t); + free(t); + + if (core_proc_maps) + IOVEC_SET_STRING(iovec[j++], core_proc_maps); + } + + p = procfs_file_alloca(pid, "limits"); + if (read_full_file(p, &t, NULL) >= 0) { + core_proc_limits = strappend("COREDUMP_PROC_LIMITS=", t); + free(t); + + if (core_proc_limits) + IOVEC_SET_STRING(iovec[j++], core_proc_limits); + } + + p = procfs_file_alloca(pid, "cgroup"); + if (read_full_file(p, &t, NULL) >=0) { + core_proc_cgroup = strappend("COREDUMP_PROC_CGROUP=", t); + free(t); + + if (core_proc_cgroup) + IOVEC_SET_STRING(iovec[j++], core_proc_cgroup); + } + + if (get_process_cwd(pid, &t) >= 0) { + core_cwd = strjoina("COREDUMP_CWD=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_cwd); + } + + if (get_process_root(pid, &t) >= 0) { + core_root = strjoina("COREDUMP_ROOT=", t); + free(t); + + IOVEC_SET_STRING(iovec[j++], core_root); + } + + if (get_process_environ(pid, &t) >= 0) { + core_environ = strappend("COREDUMP_ENVIRON=", t); + free(t); + + if (core_environ) + IOVEC_SET_STRING(iovec[j++], core_environ); + } + + core_timestamp = strjoin("COREDUMP_TIMESTAMP=", info[INFO_TIMESTAMP], "000000", NULL); + if (core_timestamp) + IOVEC_SET_STRING(iovec[j++], core_timestamp); + + IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); + + assert_cc(2 == LOG_CRIT); + IOVEC_SET_STRING(iovec[j++], "PRIORITY=2"); + + /* Vacuum before we write anything again */ + coredump_vacuum(-1, arg_keep_free, arg_max_use); + + /* Always stream the coredump to disk, if that's possible */ + r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); + if (r < 0) + /* skip whole core dumping part */ + goto log; + + /* If we don't want to keep the coredump on disk, remove it + * now, as later on we will lack the privileges for + * it. However, we keep the fd to it, so that we can still + * process it and log it. */ + r = maybe_remove_external_coredump(filename, coredump_size); + if (r < 0) + goto finish; + if (r == 0) { + const char *coredump_filename; + + coredump_filename = strjoina("COREDUMP_FILENAME=", filename); + IOVEC_SET_STRING(iovec[j++], coredump_filename); + } + + /* Vacuum again, but exclude the coredump we just created */ + coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); + + /* Now, let's drop privileges to become the user who owns the + * segfaulted process and allocate the coredump memory under + * the user's uid. This also ensures that the credentials + * journald will see are the ones of the coredumping user, + * thus making sure the user gets access to the core + * dump. Let's also get rid of all capabilities, if we run as + * root, we won't need them anymore. */ + r = drop_privileges(uid, gid, 0); + if (r < 0) { + log_error_errno(r, "Failed to drop privileges: %m"); + goto finish; + } + +#ifdef HAVE_ELFUTILS + /* Try to get a strack trace if we can */ + if (coredump_size <= arg_process_size_max) { + _cleanup_free_ char *stacktrace = NULL; + + r = coredump_make_stack_trace(coredump_fd, exe, &stacktrace); + if (r >= 0) + core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.\n\n", stacktrace, NULL); + else if (r == -EINVAL) + log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); + else + log_warning_errno(r, "Failed to generate stack trace: %m"); + } + + if (!core_message) +#endif +log: + core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.", NULL); + if (core_message) + IOVEC_SET_STRING(iovec[j++], core_message); + + /* Optionally store the entire coredump in the journal */ + if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) && + coredump_size <= arg_journal_size_max) { + size_t sz = 0; + + /* Store the coredump itself in the journal */ + + r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); + if (r >= 0) { + iovec[j].iov_base = coredump_data; + iovec[j].iov_len = sz; + j++; + } + } + + r = sd_journal_sendv(iovec, j); + if (r < 0) + log_error_errno(r, "Failed to log coredump: %m"); + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/src/coredump/coredump.conf b/src/coredump/coredump.conf new file mode 100644 index 0000000000..c2f0643e03 --- /dev/null +++ b/src/coredump/coredump.conf @@ -0,0 +1,21 @@ +# This file is part of systemd. +# +# systemd is free software; you can redistribute it and/or modify it +# under the terms of the GNU Lesser General Public License as published by +# the Free Software Foundation; either version 2.1 of the License, or +# (at your option) any later version. +# +# Entries in this file show the compile time defaults. +# You can change settings by editing this file. +# Defaults can be restored by simply deleting this file. +# +# See coredump.conf(5) for details. + +[Coredump] +#Storage=external +#Compress=yes +#ProcessSizeMax=2G +#ExternalSizeMax=2G +#JournalSizeMax=767M +#MaxUse= +#KeepFree= diff --git a/src/coredump/coredumpctl.c b/src/coredump/coredumpctl.c new file mode 100644 index 0000000000..0034a1a0ac --- /dev/null +++ b/src/coredump/coredumpctl.c @@ -0,0 +1,880 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include +#include +#include +#include +#include + +#include "sd-journal.h" + +#include "alloc-util.h" +#include "compress.h" +#include "fd-util.h" +#include "fileio.h" +#include "journal-internal.h" +#include "log.h" +#include "macro.h" +#include "pager.h" +#include "parse-util.h" +#include "path-util.h" +#include "process-util.h" +#include "set.h" +#include "sigbus.h" +#include "signal-util.h" +#include "string-util.h" +#include "terminal-util.h" +#include "user-util.h" +#include "util.h" + +static enum { + ACTION_NONE, + ACTION_INFO, + ACTION_LIST, + ACTION_DUMP, + ACTION_GDB, +} arg_action = ACTION_LIST; +static const char* arg_field = NULL; +static const char *arg_directory = NULL; +static int arg_no_pager = false; +static int arg_no_legend = false; +static int arg_one = false; +static FILE* arg_output = NULL; + +static Set *new_matches(void) { + Set *set; + char *tmp; + int r; + + set = set_new(NULL); + if (!set) { + log_oom(); + return NULL; + } + + tmp = strdup("MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); + if (!tmp) { + log_oom(); + set_free(set); + return NULL; + } + + r = set_consume(set, tmp); + if (r < 0) { + log_error_errno(r, "failed to add to set: %m"); + set_free(set); + return NULL; + } + + return set; +} + +static int add_match(Set *set, const char *match) { + _cleanup_free_ char *p = NULL; + char *pattern = NULL; + const char* prefix; + pid_t pid; + int r; + + if (strchr(match, '=')) + prefix = ""; + else if (strchr(match, '/')) { + r = path_make_absolute_cwd(match, &p); + if (r < 0) + goto fail; + match = p; + prefix = "COREDUMP_EXE="; + } else if (parse_pid(match, &pid) >= 0) + prefix = "COREDUMP_PID="; + else + prefix = "COREDUMP_COMM="; + + pattern = strjoin(prefix, match, NULL); + if (!pattern) { + r = -ENOMEM; + goto fail; + } + + log_debug("Adding pattern: %s", pattern); + r = set_consume(set, pattern); + if (r < 0) + goto fail; + + return 0; +fail: + return log_error_errno(r, "Failed to add match: %m"); +} + +static void help(void) { + printf("%s [OPTIONS...]\n\n" + "List or retrieve coredumps from the journal.\n\n" + "Flags:\n" + " -h --help Show this help\n" + " --version Print version string\n" + " --no-pager Do not pipe output into a pager\n" + " --no-legend Do not print the column headers.\n" + " -1 Show information about most recent entry only\n" + " -F --field=FIELD List all values a certain field takes\n" + " -o --output=FILE Write output to FILE\n\n" + " -D --directory=DIR Use journal files from directory\n\n" + + "Commands:\n" + " list [MATCHES...] List available coredumps (default)\n" + " info [MATCHES...] Show detailed information about one or more coredumps\n" + " dump [MATCHES...] Print first matching coredump to stdout\n" + " gdb [MATCHES...] Start gdb for the first matching coredump\n" + , program_invocation_short_name); +} + +static int parse_argv(int argc, char *argv[], Set *matches) { + enum { + ARG_VERSION = 0x100, + ARG_NO_PAGER, + ARG_NO_LEGEND, + }; + + int r, c; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version" , no_argument, NULL, ARG_VERSION }, + { "no-pager", no_argument, NULL, ARG_NO_PAGER }, + { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, + { "output", required_argument, NULL, 'o' }, + { "field", required_argument, NULL, 'F' }, + { "directory", required_argument, NULL, 'D' }, + {} + }; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "ho:F:1D:", options, NULL)) >= 0) + switch(c) { + + case 'h': + arg_action = ACTION_NONE; + help(); + return 0; + + case ARG_VERSION: + arg_action = ACTION_NONE; + return version(); + + case ARG_NO_PAGER: + arg_no_pager = true; + break; + + case ARG_NO_LEGEND: + arg_no_legend = true; + break; + + case 'o': + if (arg_output) { + log_error("cannot set output more than once"); + return -EINVAL; + } + + arg_output = fopen(optarg, "we"); + if (!arg_output) + return log_error_errno(errno, "writing to '%s': %m", optarg); + + break; + + case 'F': + if (arg_field) { + log_error("cannot use --field/-F more than once"); + return -EINVAL; + } + arg_field = optarg; + break; + + case '1': + arg_one = true; + break; + + case 'D': + arg_directory = optarg; + break; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + if (optind < argc) { + const char *cmd = argv[optind++]; + if (streq(cmd, "list")) + arg_action = ACTION_LIST; + else if (streq(cmd, "dump")) + arg_action = ACTION_DUMP; + else if (streq(cmd, "gdb")) + arg_action = ACTION_GDB; + else if (streq(cmd, "info")) + arg_action = ACTION_INFO; + else { + log_error("Unknown action '%s'", cmd); + return -EINVAL; + } + } + + if (arg_field && arg_action != ACTION_LIST) { + log_error("Option --field/-F only makes sense with list"); + return -EINVAL; + } + + while (optind < argc) { + r = add_match(matches, argv[optind]); + if (r != 0) + return r; + optind++; + } + + return 0; +} + +static int retrieve(const void *data, + size_t len, + const char *name, + char **var) { + + size_t ident; + char *v; + + ident = strlen(name) + 1; /* name + "=" */ + + if (len < ident) + return 0; + + if (memcmp(data, name, ident - 1) != 0) + return 0; + + if (((const char*) data)[ident - 1] != '=') + return 0; + + v = strndup((const char*)data + ident, len - ident); + if (!v) + return log_oom(); + + free(*var); + *var = v; + + return 0; +} + +static void print_field(FILE* file, sd_journal *j) { + _cleanup_free_ char *value = NULL; + const void *d; + size_t l; + + assert(file); + assert(j); + + assert(arg_field); + + SD_JOURNAL_FOREACH_DATA(j, d, l) + retrieve(d, l, arg_field, &value); + + if (value) + fprintf(file, "%s\n", value); +} + +static int print_list(FILE* file, sd_journal *j, int had_legend) { + _cleanup_free_ char + *pid = NULL, *uid = NULL, *gid = NULL, + *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, + *filename = NULL; + const void *d; + size_t l; + usec_t t; + char buf[FORMAT_TIMESTAMP_MAX]; + int r; + bool present; + + assert(file); + assert(j); + + SD_JOURNAL_FOREACH_DATA(j, d, l) { + retrieve(d, l, "COREDUMP_PID", &pid); + retrieve(d, l, "COREDUMP_UID", &uid); + retrieve(d, l, "COREDUMP_GID", &gid); + retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); + retrieve(d, l, "COREDUMP_EXE", &exe); + retrieve(d, l, "COREDUMP_COMM", &comm); + retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); + retrieve(d, l, "COREDUMP_FILENAME", &filename); + } + + if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) { + log_warning("Empty coredump log entry"); + return -EINVAL; + } + + r = sd_journal_get_realtime_usec(j, &t); + if (r < 0) + return log_error_errno(r, "Failed to get realtime timestamp: %m"); + + format_timestamp(buf, sizeof(buf), t); + present = filename && access(filename, F_OK) == 0; + + if (!had_legend && !arg_no_legend) + fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", + FORMAT_TIMESTAMP_WIDTH, "TIME", + 6, "PID", + 5, "UID", + 5, "GID", + 3, "SIG", + 1, "PRESENT", + "EXE"); + + fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", + FORMAT_TIMESTAMP_WIDTH, buf, + 6, strna(pid), + 5, strna(uid), + 5, strna(gid), + 3, strna(sgnl), + 1, present ? "*" : "", + strna(exe ?: (comm ?: cmdline))); + + return 0; +} + +static int print_info(FILE *file, sd_journal *j, bool need_space) { + _cleanup_free_ char + *pid = NULL, *uid = NULL, *gid = NULL, + *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, + *unit = NULL, *user_unit = NULL, *session = NULL, + *boot_id = NULL, *machine_id = NULL, *hostname = NULL, + *slice = NULL, *cgroup = NULL, *owner_uid = NULL, + *message = NULL, *timestamp = NULL, *filename = NULL; + const void *d; + size_t l; + int r; + + assert(file); + assert(j); + + SD_JOURNAL_FOREACH_DATA(j, d, l) { + retrieve(d, l, "COREDUMP_PID", &pid); + retrieve(d, l, "COREDUMP_UID", &uid); + retrieve(d, l, "COREDUMP_GID", &gid); + retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); + retrieve(d, l, "COREDUMP_EXE", &exe); + retrieve(d, l, "COREDUMP_COMM", &comm); + retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); + retrieve(d, l, "COREDUMP_UNIT", &unit); + retrieve(d, l, "COREDUMP_USER_UNIT", &user_unit); + retrieve(d, l, "COREDUMP_SESSION", &session); + retrieve(d, l, "COREDUMP_OWNER_UID", &owner_uid); + retrieve(d, l, "COREDUMP_SLICE", &slice); + retrieve(d, l, "COREDUMP_CGROUP", &cgroup); + retrieve(d, l, "COREDUMP_TIMESTAMP", ×tamp); + retrieve(d, l, "COREDUMP_FILENAME", &filename); + retrieve(d, l, "_BOOT_ID", &boot_id); + retrieve(d, l, "_MACHINE_ID", &machine_id); + retrieve(d, l, "_HOSTNAME", &hostname); + retrieve(d, l, "MESSAGE", &message); + } + + if (need_space) + fputs("\n", file); + + if (comm) + fprintf(file, + " PID: %s%s%s (%s)\n", + ansi_highlight(), strna(pid), ansi_normal(), comm); + else + fprintf(file, + " PID: %s%s%s\n", + ansi_highlight(), strna(pid), ansi_normal()); + + if (uid) { + uid_t n; + + if (parse_uid(uid, &n) >= 0) { + _cleanup_free_ char *u = NULL; + + u = uid_to_name(n); + fprintf(file, + " UID: %s (%s)\n", + uid, u); + } else { + fprintf(file, + " UID: %s\n", + uid); + } + } + + if (gid) { + gid_t n; + + if (parse_gid(gid, &n) >= 0) { + _cleanup_free_ char *g = NULL; + + g = gid_to_name(n); + fprintf(file, + " GID: %s (%s)\n", + gid, g); + } else { + fprintf(file, + " GID: %s\n", + gid); + } + } + + if (sgnl) { + int sig; + + if (safe_atoi(sgnl, &sig) >= 0) + fprintf(file, " Signal: %s (%s)\n", sgnl, signal_to_string(sig)); + else + fprintf(file, " Signal: %s\n", sgnl); + } + + if (timestamp) { + usec_t u; + + r = safe_atou64(timestamp, &u); + if (r >= 0) { + char absolute[FORMAT_TIMESTAMP_MAX], relative[FORMAT_TIMESPAN_MAX]; + + fprintf(file, + " Timestamp: %s (%s)\n", + format_timestamp(absolute, sizeof(absolute), u), + format_timestamp_relative(relative, sizeof(relative), u)); + + } else + fprintf(file, " Timestamp: %s\n", timestamp); + } + + if (cmdline) + fprintf(file, " Command Line: %s\n", cmdline); + if (exe) + fprintf(file, " Executable: %s%s%s\n", ansi_highlight(), exe, ansi_normal()); + if (cgroup) + fprintf(file, " Control Group: %s\n", cgroup); + if (unit) + fprintf(file, " Unit: %s\n", unit); + if (user_unit) + fprintf(file, " User Unit: %s\n", unit); + if (slice) + fprintf(file, " Slice: %s\n", slice); + if (session) + fprintf(file, " Session: %s\n", session); + if (owner_uid) { + uid_t n; + + if (parse_uid(owner_uid, &n) >= 0) { + _cleanup_free_ char *u = NULL; + + u = uid_to_name(n); + fprintf(file, + " Owner UID: %s (%s)\n", + owner_uid, u); + } else { + fprintf(file, + " Owner UID: %s\n", + owner_uid); + } + } + if (boot_id) + fprintf(file, " Boot ID: %s\n", boot_id); + if (machine_id) + fprintf(file, " Machine ID: %s\n", machine_id); + if (hostname) + fprintf(file, " Hostname: %s\n", hostname); + + if (filename && access(filename, F_OK) == 0) + fprintf(file, " Coredump: %s\n", filename); + + if (message) { + _cleanup_free_ char *m = NULL; + + m = strreplace(message, "\n", "\n "); + + fprintf(file, " Message: %s\n", strstrip(m ?: message)); + } + + return 0; +} + +static int focus(sd_journal *j) { + int r; + + r = sd_journal_seek_tail(j); + if (r == 0) + r = sd_journal_previous(j); + if (r < 0) + return log_error_errno(r, "Failed to search journal: %m"); + if (r == 0) { + log_error("No match found."); + return -ESRCH; + } + return r; +} + +static void print_entry(sd_journal *j, unsigned n_found) { + assert(j); + + if (arg_action == ACTION_INFO) + print_info(stdout, j, n_found); + else if (arg_field) + print_field(stdout, j); + else + print_list(stdout, j, n_found); +} + +static int dump_list(sd_journal *j) { + unsigned n_found = 0; + int r; + + assert(j); + + /* The coredumps are likely to compressed, and for just + * listing them we don't need to decompress them, so let's + * pick a fairly low data threshold here */ + sd_journal_set_data_threshold(j, 4096); + + if (arg_one) { + r = focus(j); + if (r < 0) + return r; + + print_entry(j, 0); + } else { + SD_JOURNAL_FOREACH(j) + print_entry(j, n_found++); + + if (!arg_field && n_found <= 0) { + log_notice("No coredumps found."); + return -ESRCH; + } + } + + return 0; +} + +static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) { + const char *data; + _cleanup_free_ char *filename = NULL; + size_t len; + int r; + + assert((fd >= 0) != !!path); + assert(!!path == !!unlink_temp); + + /* Prefer uncompressed file to journal (probably cached) to + * compressed file (probably uncached). */ + r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len); + if (r < 0 && r != -ENOENT) + log_warning_errno(r, "Failed to retrieve COREDUMP_FILENAME: %m"); + else if (r == 0) + retrieve(data, len, "COREDUMP_FILENAME", &filename); + + if (filename && access(filename, R_OK) < 0) { + log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, + "File %s is not readable: %m", filename); + filename = mfree(filename); + } + + if (filename && !endswith(filename, ".xz") && !endswith(filename, ".lz4")) { + if (path) { + *path = filename; + filename = NULL; + } + + return 0; + } else { + _cleanup_close_ int fdt = -1; + char *temp = NULL; + + if (fd < 0) { + temp = strdup("/var/tmp/coredump-XXXXXX"); + if (!temp) + return log_oom(); + + fdt = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC); + if (fdt < 0) + return log_error_errno(fdt, "Failed to create temporary file: %m"); + log_debug("Created temporary file %s", temp); + + fd = fdt; + } + + r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len); + if (r == 0) { + ssize_t sz; + + assert(len >= 9); + data += 9; + len -= 9; + + sz = write(fdt, data, len); + if (sz < 0) { + r = log_error_errno(errno, + "Failed to write temporary file: %m"); + goto error; + } + if (sz != (ssize_t) len) { + log_error("Short write to temporary file."); + r = -EIO; + goto error; + } + } else if (filename) { +#if defined(HAVE_XZ) || defined(HAVE_LZ4) + _cleanup_close_ int fdf; + + fdf = open(filename, O_RDONLY | O_CLOEXEC); + if (fdf < 0) { + r = log_error_errno(errno, + "Failed to open %s: %m", + filename); + goto error; + } + + r = decompress_stream(filename, fdf, fd, -1); + if (r < 0) { + log_error_errno(r, "Failed to decompress %s: %m", filename); + goto error; + } +#else + log_error("Cannot decompress file. Compiled without compression support."); + r = -EOPNOTSUPP; + goto error; +#endif + } else { + if (r == -ENOENT) + log_error("Cannot retrieve coredump from journal nor disk."); + else + log_error_errno(r, "Failed to retrieve COREDUMP field: %m"); + goto error; + } + + if (temp) { + *path = temp; + *unlink_temp = true; + } + + return 0; + +error: + if (temp) { + unlink(temp); + log_debug("Removed temporary file %s", temp); + } + return r; + } +} + +static int dump_core(sd_journal* j) { + int r; + + assert(j); + + r = focus(j); + if (r < 0) + return r; + + print_info(arg_output ? stdout : stderr, j, false); + + if (on_tty() && !arg_output) { + log_error("Refusing to dump core to tty."); + return -ENOTTY; + } + + r = save_core(j, arg_output ? fileno(arg_output) : STDOUT_FILENO, NULL, NULL); + if (r < 0) + return log_error_errno(r, "Coredump retrieval failed: %m"); + + r = sd_journal_previous(j); + if (r >= 0) + log_warning("More than one entry matches, ignoring rest."); + + return 0; +} + +static int run_gdb(sd_journal *j) { + _cleanup_free_ char *exe = NULL, *path = NULL; + bool unlink_path = false; + const char *data; + siginfo_t st; + size_t len; + pid_t pid; + int r; + + assert(j); + + r = focus(j); + if (r < 0) + return r; + + print_info(stdout, j, false); + fputs("\n", stdout); + + r = sd_journal_get_data(j, "COREDUMP_EXE", (const void**) &data, &len); + if (r < 0) + return log_error_errno(r, "Failed to retrieve COREDUMP_EXE field: %m"); + + assert(len > strlen("COREDUMP_EXE=")); + data += strlen("COREDUMP_EXE="); + len -= strlen("COREDUMP_EXE="); + + exe = strndup(data, len); + if (!exe) + return log_oom(); + + if (endswith(exe, " (deleted)")) { + log_error("Binary already deleted."); + return -ENOENT; + } + + if (!path_is_absolute(exe)) { + log_error("Binary is not an absolute path."); + return -ENOENT; + } + + r = save_core(j, -1, &path, &unlink_path); + if (r < 0) + return log_error_errno(r, "Failed to retrieve core: %m"); + + pid = fork(); + if (pid < 0) { + r = log_error_errno(errno, "Failed to fork(): %m"); + goto finish; + } + if (pid == 0) { + (void) reset_all_signal_handlers(); + (void) reset_signal_mask(); + + execlp("gdb", "gdb", exe, path, NULL); + + log_error_errno(errno, "Failed to invoke gdb: %m"); + _exit(1); + } + + r = wait_for_terminate(pid, &st); + if (r < 0) { + log_error_errno(r, "Failed to wait for gdb: %m"); + goto finish; + } + + r = st.si_code == CLD_EXITED ? st.si_status : 255; + +finish: + if (unlink_path) { + log_debug("Removed temporary file %s", path); + unlink(path); + } + + return r; +} + +int main(int argc, char *argv[]) { + _cleanup_(sd_journal_closep) sd_journal*j = NULL; + const char* match; + Iterator it; + int r = 0; + _cleanup_set_free_free_ Set *matches = NULL; + + setlocale(LC_ALL, ""); + log_parse_environment(); + log_open(); + + matches = new_matches(); + if (!matches) { + r = -ENOMEM; + goto end; + } + + r = parse_argv(argc, argv, matches); + if (r < 0) + goto end; + + if (arg_action == ACTION_NONE) + goto end; + + sigbus_install(); + + if (arg_directory) { + r = sd_journal_open_directory(&j, arg_directory, 0); + if (r < 0) { + log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory); + goto end; + } + } else { + r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY); + if (r < 0) { + log_error_errno(r, "Failed to open journal: %m"); + goto end; + } + } + + /* We want full data, nothing truncated. */ + sd_journal_set_data_threshold(j, 0); + + SET_FOREACH(match, matches, it) { + r = sd_journal_add_match(j, match, strlen(match)); + if (r != 0) { + log_error_errno(r, "Failed to add match '%s': %m", + match); + goto end; + } + } + + if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { + _cleanup_free_ char *filter; + + filter = journal_make_match_string(j); + log_debug("Journal filter: %s", filter); + } + + switch(arg_action) { + + case ACTION_LIST: + case ACTION_INFO: + if (!arg_no_pager) + pager_open(false); + + r = dump_list(j); + break; + + case ACTION_DUMP: + r = dump_core(j); + break; + + case ACTION_GDB: + r = run_gdb(j); + break; + + default: + assert_not_reached("Shouldn't be here"); + } + +end: + pager_close(); + + if (arg_output) + fclose(arg_output); + + return r >= 0 ? r : EXIT_FAILURE; +} diff --git a/src/coredump/stacktrace.c b/src/coredump/stacktrace.c new file mode 100644 index 0000000000..68806992fc --- /dev/null +++ b/src/coredump/stacktrace.c @@ -0,0 +1,200 @@ +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include +#include + +#include "alloc-util.h" +#include "fd-util.h" +#include "formats-util.h" +#include "macro.h" +#include "stacktrace.h" +#include "string-util.h" +#include "util.h" + +#define FRAMES_MAX 64 +#define THREADS_MAX 64 + +struct stack_context { + FILE *f; + Dwfl *dwfl; + Elf *elf; + unsigned n_thread; + unsigned n_frame; +}; + +static int frame_callback(Dwfl_Frame *frame, void *userdata) { + struct stack_context *c = userdata; + Dwarf_Addr pc, pc_adjusted, bias = 0; + _cleanup_free_ Dwarf_Die *scopes = NULL; + const char *fname = NULL, *symbol = NULL; + Dwfl_Module *module; + bool is_activation; + + assert(frame); + assert(c); + + if (c->n_frame >= FRAMES_MAX) + return DWARF_CB_ABORT; + + if (!dwfl_frame_pc(frame, &pc, &is_activation)) + return DWARF_CB_ABORT; + + pc_adjusted = pc - (is_activation ? 0 : 1); + + module = dwfl_addrmodule(c->dwfl, pc_adjusted); + if (module) { + Dwarf_Die *s, *cudie; + int n; + + cudie = dwfl_module_addrdie(module, pc_adjusted, &bias); + if (cudie) { + n = dwarf_getscopes(cudie, pc_adjusted - bias, &scopes); + for (s = scopes; s < scopes + n; s++) { + if (IN_SET(dwarf_tag(s), DW_TAG_subprogram, DW_TAG_inlined_subroutine, DW_TAG_entry_point)) { + Dwarf_Attribute *a, space; + + a = dwarf_attr_integrate(s, DW_AT_MIPS_linkage_name, &space); + if (!a) + a = dwarf_attr_integrate(s, DW_AT_linkage_name, &space); + if (a) + symbol = dwarf_formstring(a); + if (!symbol) + symbol = dwarf_diename(s); + + if (symbol) + break; + } + } + } + + if (!symbol) + symbol = dwfl_module_addrname(module, pc_adjusted); + + fname = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, NULL, NULL); + } + + fprintf(c->f, "#%-2u 0x%016" PRIx64 " %s (%s)\n", c->n_frame, (uint64_t) pc, strna(symbol), strna(fname)); + c->n_frame ++; + + return DWARF_CB_OK; +} + +static int thread_callback(Dwfl_Thread *thread, void *userdata) { + struct stack_context *c = userdata; + pid_t tid; + + assert(thread); + assert(c); + + if (c->n_thread >= THREADS_MAX) + return DWARF_CB_ABORT; + + if (c->n_thread != 0) + fputc('\n', c->f); + + c->n_frame = 0; + + tid = dwfl_thread_tid(thread); + fprintf(c->f, "Stack trace of thread " PID_FMT ":\n", tid); + + if (dwfl_thread_getframes(thread, frame_callback, c) < 0) + return DWARF_CB_ABORT; + + c->n_thread ++; + + return DWARF_CB_OK; +} + +int coredump_make_stack_trace(int fd, const char *executable, char **ret) { + + static const Dwfl_Callbacks callbacks = { + .find_elf = dwfl_build_id_find_elf, + .find_debuginfo = dwfl_standard_find_debuginfo, + }; + + struct stack_context c = {}; + char *buf = NULL; + size_t sz = 0; + int r; + + assert(fd >= 0); + assert(ret); + + if (lseek(fd, 0, SEEK_SET) == (off_t) -1) + return -errno; + + c.f = open_memstream(&buf, &sz); + if (!c.f) + return -ENOMEM; + + elf_version(EV_CURRENT); + + c.elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); + if (!c.elf) { + r = -EINVAL; + goto finish; + } + + c.dwfl = dwfl_begin(&callbacks); + if (!c.dwfl) { + r = -EINVAL; + goto finish; + } + + if (dwfl_core_file_report(c.dwfl, c.elf, executable) < 0) { + r = -EINVAL; + goto finish; + } + + if (dwfl_report_end(c.dwfl, NULL, NULL) != 0) { + r = -EINVAL; + goto finish; + } + + if (dwfl_core_file_attach(c.dwfl, c.elf) < 0) { + r = -EINVAL; + goto finish; + } + + if (dwfl_getthreads(c.dwfl, thread_callback, &c) < 0) { + r = -EINVAL; + goto finish; + } + + c.f = safe_fclose(c.f); + + *ret = buf; + buf = NULL; + + r = 0; + +finish: + if (c.dwfl) + dwfl_end(c.dwfl); + + if (c.elf) + elf_end(c.elf); + + safe_fclose(c.f); + + free(buf); + + return r; +} diff --git a/src/coredump/stacktrace.h b/src/coredump/stacktrace.h new file mode 100644 index 0000000000..15e9c04465 --- /dev/null +++ b/src/coredump/stacktrace.h @@ -0,0 +1,22 @@ +#pragma once + +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +int coredump_make_stack_trace(int fd, const char *executable, char **ret); diff --git a/src/coredump/test-coredump-vacuum.c b/src/coredump/test-coredump-vacuum.c new file mode 100644 index 0000000000..70a57f183f --- /dev/null +++ b/src/coredump/test-coredump-vacuum.c @@ -0,0 +1,30 @@ +/*** + This file is part of systemd. + + Copyright 2012 Zbigniew Jędrzejewski-Szmek + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see . +***/ + +#include + +#include "coredump-vacuum.h" + +int main(int argc, char *argv[]) { + + if (coredump_vacuum(-1, (uint64_t) -1, 70 * 1024) < 0) + return EXIT_FAILURE; + + return EXIT_SUCCESS; +} diff --git a/src/journal/coredump-vacuum.c b/src/journal/coredump-vacuum.c deleted file mode 100644 index f02b6dbd87..0000000000 --- a/src/journal/coredump-vacuum.c +++ /dev/null @@ -1,268 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2014 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include - -#include "alloc-util.h" -#include "coredump-vacuum.h" -#include "dirent-util.h" -#include "fd-util.h" -#include "hashmap.h" -#include "macro.h" -#include "string-util.h" -#include "time-util.h" -#include "user-util.h" -#include "util.h" - -#define DEFAULT_MAX_USE_LOWER (uint64_t) (1ULL*1024ULL*1024ULL) /* 1 MiB */ -#define DEFAULT_MAX_USE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ -#define DEFAULT_KEEP_FREE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ -#define DEFAULT_KEEP_FREE (uint64_t) (1024ULL*1024ULL) /* 1 MB */ - -struct vacuum_candidate { - unsigned n_files; - char *oldest_file; - usec_t oldest_mtime; -}; - -static void vacuum_candidate_free(struct vacuum_candidate *c) { - if (!c) - return; - - free(c->oldest_file); - free(c); -} - -DEFINE_TRIVIAL_CLEANUP_FUNC(struct vacuum_candidate*, vacuum_candidate_free); - -static void vacuum_candidate_hasmap_free(Hashmap *h) { - struct vacuum_candidate *c; - - while ((c = hashmap_steal_first(h))) - vacuum_candidate_free(c); - - hashmap_free(h); -} - -DEFINE_TRIVIAL_CLEANUP_FUNC(Hashmap*, vacuum_candidate_hasmap_free); - -static int uid_from_file_name(const char *filename, uid_t *uid) { - const char *p, *e, *u; - - p = startswith(filename, "core."); - if (!p) - return -EINVAL; - - /* Skip the comm field */ - p = strchr(p, '.'); - if (!p) - return -EINVAL; - p++; - - /* Find end up UID */ - e = strchr(p, '.'); - if (!e) - return -EINVAL; - - u = strndupa(p, e-p); - return parse_uid(u, uid); -} - -static bool vacuum_necessary(int fd, uint64_t sum, uint64_t keep_free, uint64_t max_use) { - uint64_t fs_size = 0, fs_free = (uint64_t) -1; - struct statvfs sv; - - assert(fd >= 0); - - if (fstatvfs(fd, &sv) >= 0) { - fs_size = sv.f_frsize * sv.f_blocks; - fs_free = sv.f_frsize * sv.f_bfree; - } - - if (max_use == (uint64_t) -1) { - - if (fs_size > 0) { - max_use = PAGE_ALIGN(fs_size / 10); /* 10% */ - - if (max_use > DEFAULT_MAX_USE_UPPER) - max_use = DEFAULT_MAX_USE_UPPER; - - if (max_use < DEFAULT_MAX_USE_LOWER) - max_use = DEFAULT_MAX_USE_LOWER; - } else - max_use = DEFAULT_MAX_USE_LOWER; - } else - max_use = PAGE_ALIGN(max_use); - - if (max_use > 0 && sum > max_use) - return true; - - if (keep_free == (uint64_t) -1) { - - if (fs_size > 0) { - keep_free = PAGE_ALIGN((fs_size * 3) / 20); /* 15% */ - - if (keep_free > DEFAULT_KEEP_FREE_UPPER) - keep_free = DEFAULT_KEEP_FREE_UPPER; - } else - keep_free = DEFAULT_KEEP_FREE; - } else - keep_free = PAGE_ALIGN(keep_free); - - if (keep_free > 0 && fs_free < keep_free) - return true; - - return false; -} - -int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use) { - _cleanup_closedir_ DIR *d = NULL; - struct stat exclude_st; - int r; - - if (keep_free == 0 && max_use == 0) - return 0; - - if (exclude_fd >= 0) { - if (fstat(exclude_fd, &exclude_st) < 0) - return log_error_errno(errno, "Failed to fstat(): %m"); - } - - /* This algorithm will keep deleting the oldest file of the - * user with the most coredumps until we are back in the size - * limits. Note that vacuuming for journal files is different, - * because we rely on rate-limiting of the messages there, - * to avoid being flooded. */ - - d = opendir("/var/lib/systemd/coredump"); - if (!d) { - if (errno == ENOENT) - return 0; - - return log_error_errno(errno, "Can't open coredump directory: %m"); - } - - for (;;) { - _cleanup_(vacuum_candidate_hasmap_freep) Hashmap *h = NULL; - struct vacuum_candidate *worst = NULL; - struct dirent *de; - uint64_t sum = 0; - - rewinddir(d); - - FOREACH_DIRENT(de, d, goto fail) { - struct vacuum_candidate *c; - struct stat st; - uid_t uid; - usec_t t; - - r = uid_from_file_name(de->d_name, &uid); - if (r < 0) - continue; - - if (fstatat(dirfd(d), de->d_name, &st, AT_NO_AUTOMOUNT|AT_SYMLINK_NOFOLLOW) < 0) { - if (errno == ENOENT) - continue; - - log_warning_errno(errno, "Failed to stat /var/lib/systemd/coredump/%s: %m", de->d_name); - continue; - } - - if (!S_ISREG(st.st_mode)) - continue; - - if (exclude_fd >= 0 && - exclude_st.st_dev == st.st_dev && - exclude_st.st_ino == st.st_ino) - continue; - - r = hashmap_ensure_allocated(&h, NULL); - if (r < 0) - return log_oom(); - - t = timespec_load(&st.st_mtim); - - c = hashmap_get(h, UID_TO_PTR(uid)); - if (c) { - - if (t < c->oldest_mtime) { - char *n; - - n = strdup(de->d_name); - if (!n) - return log_oom(); - - free(c->oldest_file); - c->oldest_file = n; - c->oldest_mtime = t; - } - - } else { - _cleanup_(vacuum_candidate_freep) struct vacuum_candidate *n = NULL; - - n = new0(struct vacuum_candidate, 1); - if (!n) - return log_oom(); - - n->oldest_file = strdup(de->d_name); - if (!n->oldest_file) - return log_oom(); - - n->oldest_mtime = t; - - r = hashmap_put(h, UID_TO_PTR(uid), n); - if (r < 0) - return log_oom(); - - c = n; - n = NULL; - } - - c->n_files++; - - if (!worst || - worst->n_files < c->n_files || - (worst->n_files == c->n_files && c->oldest_mtime < worst->oldest_mtime)) - worst = c; - - sum += st.st_blocks * 512; - } - - if (!worst) - break; - - r = vacuum_necessary(dirfd(d), sum, keep_free, max_use); - if (r <= 0) - return r; - - if (unlinkat(dirfd(d), worst->oldest_file, 0) < 0) { - - if (errno == ENOENT) - continue; - - return log_error_errno(errno, "Failed to remove file %s: %m", worst->oldest_file); - } else - log_info("Removed old coredump %s.", worst->oldest_file); - } - - return 0; - -fail: - return log_error_errno(errno, "Failed to read directory: %m"); -} diff --git a/src/journal/coredump-vacuum.h b/src/journal/coredump-vacuum.h deleted file mode 100644 index 4b7b9f2d98..0000000000 --- a/src/journal/coredump-vacuum.h +++ /dev/null @@ -1,25 +0,0 @@ -#pragma once - -/*** - This file is part of systemd. - - Copyright 2014 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include -#include - -int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use); diff --git a/src/journal/coredump.c b/src/journal/coredump.c deleted file mode 100644 index 8b1c670cc6..0000000000 --- a/src/journal/coredump.c +++ /dev/null @@ -1,880 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2012 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include -#include -#include -#include -#include - -#ifdef HAVE_ELFUTILS -# include -# include -#endif - -#include "sd-journal.h" -#include "sd-login.h" - -#include "acl-util.h" -#include "alloc-util.h" -#include "capability-util.h" -#include "cgroup-util.h" -#include "compress.h" -#include "conf-parser.h" -#include "copy.h" -#include "coredump-vacuum.h" -#include "dirent-util.h" -#include "escape.h" -#include "fd-util.h" -#include "fileio.h" -#include "fs-util.h" -#include "io-util.h" -#include "journald-native.h" -#include "log.h" -#include "macro.h" -#include "mkdir.h" -#include "parse-util.h" -#include "process-util.h" -#include "special.h" -#include "stacktrace.h" -#include "string-table.h" -#include "string-util.h" -#include "strv.h" -#include "user-util.h" -#include "util.h" - -/* The maximum size up to which we process coredumps */ -#define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) - -/* The maximum size up to which we leave the coredump around on - * disk */ -#define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX - -/* The maximum size up to which we store the coredump in the - * journal */ -#define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) - -/* Make sure to not make this larger than the maximum journal entry - * size. See DATA_SIZE_MAX in journald-native.c. */ -assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); - -enum { - INFO_PID, - INFO_UID, - INFO_GID, - INFO_SIGNAL, - INFO_TIMESTAMP, - INFO_COMM, - INFO_EXE, - _INFO_LEN -}; - -typedef enum CoredumpStorage { - COREDUMP_STORAGE_NONE, - COREDUMP_STORAGE_EXTERNAL, - COREDUMP_STORAGE_JOURNAL, - COREDUMP_STORAGE_BOTH, - _COREDUMP_STORAGE_MAX, - _COREDUMP_STORAGE_INVALID = -1 -} CoredumpStorage; - -static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { - [COREDUMP_STORAGE_NONE] = "none", - [COREDUMP_STORAGE_EXTERNAL] = "external", - [COREDUMP_STORAGE_JOURNAL] = "journal", - [COREDUMP_STORAGE_BOTH] = "both", -}; - -DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); -static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); - -static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; -static bool arg_compress = true; -static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; -static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; -static size_t arg_journal_size_max = JOURNAL_SIZE_MAX; -static uint64_t arg_keep_free = (uint64_t) -1; -static uint64_t arg_max_use = (uint64_t) -1; - -static int parse_config(void) { - static const ConfigTableItem items[] = { - { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, - { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, - { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, - { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, - { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, - { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, - { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, - {} - }; - - return config_parse_many(PKGSYSCONFDIR "/coredump.conf", - CONF_PATHS_NULSTR("systemd/coredump.conf.d"), - "Coredump\0", - config_item_table_lookup, items, - false, NULL); -} - -static int fix_acl(int fd, uid_t uid) { - -#ifdef HAVE_ACL - _cleanup_(acl_freep) acl_t acl = NULL; - acl_entry_t entry; - acl_permset_t permset; - int r; - - assert(fd >= 0); - - if (uid <= SYSTEM_UID_MAX) - return 0; - - /* Make sure normal users can read (but not write or delete) - * their own coredumps */ - - acl = acl_get_fd(fd); - if (!acl) - return log_error_errno(errno, "Failed to get ACL: %m"); - - if (acl_create_entry(&acl, &entry) < 0 || - acl_set_tag_type(entry, ACL_USER) < 0 || - acl_set_qualifier(entry, &uid) < 0) { - log_error_errno(errno, "Failed to patch ACL: %m"); - return -errno; - } - - if (acl_get_permset(entry, &permset) < 0 || - acl_add_perm(permset, ACL_READ) < 0) - return log_warning_errno(errno, "Failed to patch ACL: %m"); - - r = calc_acl_mask_if_needed(&acl); - if (r < 0) - return log_warning_errno(r, "Failed to patch ACL: %m"); - - if (acl_set_fd(fd, acl) < 0) - return log_error_errno(errno, "Failed to apply ACL: %m"); -#endif - - return 0; -} - -static int fix_xattr(int fd, const char *info[_INFO_LEN]) { - - static const char * const xattrs[_INFO_LEN] = { - [INFO_PID] = "user.coredump.pid", - [INFO_UID] = "user.coredump.uid", - [INFO_GID] = "user.coredump.gid", - [INFO_SIGNAL] = "user.coredump.signal", - [INFO_TIMESTAMP] = "user.coredump.timestamp", - [INFO_COMM] = "user.coredump.comm", - [INFO_EXE] = "user.coredump.exe", - }; - - int r = 0; - unsigned i; - - assert(fd >= 0); - - /* Attach some metadata to coredumps via extended - * attributes. Just because we can. */ - - for (i = 0; i < _INFO_LEN; i++) { - int k; - - if (isempty(info[i]) || !xattrs[i]) - continue; - - k = fsetxattr(fd, xattrs[i], info[i], strlen(info[i]), XATTR_CREATE); - if (k < 0 && r == 0) - r = -errno; - } - - return r; -} - -#define filename_escape(s) xescape((s), "./ ") - -static int fix_permissions( - int fd, - const char *filename, - const char *target, - const char *info[_INFO_LEN], - uid_t uid) { - - assert(fd >= 0); - assert(filename); - assert(target); - assert(info); - - /* Ignore errors on these */ - fchmod(fd, 0640); - fix_acl(fd, uid); - fix_xattr(fd, info); - - if (fsync(fd) < 0) - return log_error_errno(errno, "Failed to sync coredump %s: %m", filename); - - if (rename(filename, target) < 0) - return log_error_errno(errno, "Failed to rename coredump %s -> %s: %m", filename, target); - - return 0; -} - -static int maybe_remove_external_coredump(const char *filename, uint64_t size) { - - /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ - - if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) && - size <= arg_external_size_max) - return 0; - - if (!filename) - return 1; - - if (unlink(filename) < 0 && errno != ENOENT) - return log_error_errno(errno, "Failed to unlink %s: %m", filename); - - return 1; -} - -static int make_filename(const char *info[_INFO_LEN], char **ret) { - _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; - sd_id128_t boot = {}; - int r; - - assert(info); - - c = filename_escape(info[INFO_COMM]); - if (!c) - return -ENOMEM; - - u = filename_escape(info[INFO_UID]); - if (!u) - return -ENOMEM; - - r = sd_id128_get_boot(&boot); - if (r < 0) - return r; - - p = filename_escape(info[INFO_PID]); - if (!p) - return -ENOMEM; - - t = filename_escape(info[INFO_TIMESTAMP]); - if (!t) - return -ENOMEM; - - if (asprintf(ret, - "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", - c, - u, - SD_ID128_FORMAT_VAL(boot), - p, - t) < 0) - return -ENOMEM; - - return 0; -} - -static int save_external_coredump( - const char *info[_INFO_LEN], - uid_t uid, - char **ret_filename, - int *ret_node_fd, - int *ret_data_fd, - uint64_t *ret_size) { - - _cleanup_free_ char *fn = NULL, *tmp = NULL; - _cleanup_close_ int fd = -1; - struct stat st; - int r; - - assert(info); - assert(ret_filename); - assert(ret_node_fd); - assert(ret_data_fd); - assert(ret_size); - - r = make_filename(info, &fn); - if (r < 0) - return log_error_errno(r, "Failed to determine coredump file name: %m"); - - r = tempfn_random(fn, NULL, &tmp); - if (r < 0) - return log_error_errno(r, "Failed to determine temporary file name: %m"); - - mkdir_p_label("/var/lib/systemd/coredump", 0755); - - fd = open(tmp, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640); - if (fd < 0) - return log_error_errno(errno, "Failed to create coredump file %s: %m", tmp); - - r = copy_bytes(STDIN_FILENO, fd, arg_process_size_max, false); - if (r == -EFBIG) { - log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", info[INFO_PID], info[INFO_COMM]); - goto fail; - } else if (IN_SET(r, -EDQUOT, -ENOSPC)) { - log_error("Not enough disk space for coredump of %s (%s), refusing.", info[INFO_PID], info[INFO_COMM]); - goto fail; - } else if (r < 0) { - log_error_errno(r, "Failed to dump coredump to file: %m"); - goto fail; - } - - if (fstat(fd, &st) < 0) { - log_error_errno(errno, "Failed to fstat coredump %s: %m", tmp); - goto fail; - } - - if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { - log_error_errno(errno, "Failed to seek on %s: %m", tmp); - goto fail; - } - -#if defined(HAVE_XZ) || defined(HAVE_LZ4) - /* If we will remove the coredump anyway, do not compress. */ - if (maybe_remove_external_coredump(NULL, st.st_size) == 0 - && arg_compress) { - - _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; - _cleanup_close_ int fd_compressed = -1; - - fn_compressed = strappend(fn, COMPRESSED_EXT); - if (!fn_compressed) { - log_oom(); - goto uncompressed; - } - - r = tempfn_random(fn_compressed, NULL, &tmp_compressed); - if (r < 0) { - log_error_errno(r, "Failed to determine temporary file name for %s: %m", fn_compressed); - goto uncompressed; - } - - fd_compressed = open(tmp_compressed, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640); - if (fd_compressed < 0) { - log_error_errno(errno, "Failed to create file %s: %m", tmp_compressed); - goto uncompressed; - } - - r = compress_stream(fd, fd_compressed, -1); - if (r < 0) { - log_error_errno(r, "Failed to compress %s: %m", tmp_compressed); - goto fail_compressed; - } - - r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, info, uid); - if (r < 0) - goto fail_compressed; - - /* OK, this worked, we can get rid of the uncompressed version now */ - unlink_noerrno(tmp); - - *ret_filename = fn_compressed; /* compressed */ - *ret_node_fd = fd_compressed; /* compressed */ - *ret_data_fd = fd; /* uncompressed */ - *ret_size = (uint64_t) st.st_size; /* uncompressed */ - - fn_compressed = NULL; - fd = fd_compressed = -1; - - return 0; - - fail_compressed: - unlink_noerrno(tmp_compressed); - } - -uncompressed: -#endif - - r = fix_permissions(fd, tmp, fn, info, uid); - if (r < 0) - goto fail; - - *ret_filename = fn; - *ret_data_fd = fd; - *ret_node_fd = -1; - *ret_size = (uint64_t) st.st_size; - - fn = NULL; - fd = -1; - - return 0; - -fail: - unlink_noerrno(tmp); - return r; -} - -static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { - _cleanup_free_ char *field = NULL; - ssize_t n; - - assert(fd >= 0); - assert(ret); - assert(ret_size); - - if (lseek(fd, 0, SEEK_SET) == (off_t) -1) - return log_warning_errno(errno, "Failed to seek: %m"); - - field = malloc(9 + size); - if (!field) { - log_warning("Failed to allocate memory for coredump, coredump will not be stored."); - return -ENOMEM; - } - - memcpy(field, "COREDUMP=", 9); - - n = read(fd, field + 9, size); - if (n < 0) - return log_error_errno((int) n, "Failed to read core data: %m"); - if ((size_t) n < size) { - log_error("Core data too short."); - return -EIO; - } - - *ret = field; - *ret_size = size + 9; - - field = NULL; - - return 0; -} - -/* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: - * 0:/dev/pts/23 - * pos: 0 - * flags: 0100002 - * - * 1:/dev/pts/23 - * pos: 0 - * flags: 0100002 - * - * 2:/dev/pts/23 - * pos: 0 - * flags: 0100002 - * EOF - */ -static int compose_open_fds(pid_t pid, char **open_fds) { - _cleanup_closedir_ DIR *proc_fd_dir = NULL; - _cleanup_close_ int proc_fdinfo_fd = -1; - _cleanup_free_ char *buffer = NULL; - _cleanup_fclose_ FILE *stream = NULL; - const char *fddelim = "", *path; - struct dirent *dent = NULL; - size_t size = 0; - int r = 0; - - assert(pid >= 0); - assert(open_fds != NULL); - - path = procfs_file_alloca(pid, "fd"); - proc_fd_dir = opendir(path); - if (!proc_fd_dir) - return -errno; - - proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); - if (proc_fdinfo_fd < 0) - return -errno; - - stream = open_memstream(&buffer, &size); - if (!stream) - return -ENOMEM; - - FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { - _cleanup_fclose_ FILE *fdinfo = NULL; - _cleanup_free_ char *fdname = NULL; - char line[LINE_MAX]; - int fd; - - r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); - if (r < 0) - return r; - - fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); - fddelim = "\n"; - - /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ - fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); - if (fd < 0) - continue; - - fdinfo = fdopen(fd, "re"); - if (fdinfo == NULL) { - close(fd); - continue; - } - - FOREACH_LINE(line, fdinfo, break) { - fputs(line, stream); - if (!endswith(line, "\n")) - fputc('\n', stream); - } - } - - errno = 0; - stream = safe_fclose(stream); - - if (errno > 0) - return -errno; - - *open_fds = buffer; - buffer = NULL; - - return 0; -} - -int main(int argc, char* argv[]) { - - /* The small core field we allocate on the stack, to keep things simple */ - char - *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL, - *core_session = NULL, *core_exe = NULL, *core_comm = NULL, *core_cmdline = NULL, - *core_cgroup = NULL, *core_cwd = NULL, *core_root = NULL, *core_unit = NULL, - *core_slice = NULL; - - /* The larger ones we allocate on the heap */ - _cleanup_free_ char - *core_timestamp = NULL, *core_message = NULL, *coredump_data = NULL, *core_owner_uid = NULL, - *core_open_fds = NULL, *core_proc_status = NULL, *core_proc_maps = NULL, *core_proc_limits = NULL, - *core_proc_cgroup = NULL, *core_environ = NULL; - - _cleanup_free_ char *exe = NULL, *comm = NULL, *filename = NULL; - const char *info[_INFO_LEN]; - - _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; - - struct iovec iovec[26]; - uint64_t coredump_size; - int r, j = 0; - uid_t uid, owner_uid; - gid_t gid; - pid_t pid; - char *t; - const char *p; - - /* Make sure we never enter a loop */ - prctl(PR_SET_DUMPABLE, 0); - - /* First, log to a safe place, since we don't know what - * crashed and it might be journald which we'd rather not log - * to then. */ - log_set_target(LOG_TARGET_KMSG); - log_open(); - - if (argc < INFO_COMM + 1) { - log_error("Not enough arguments passed from kernel (%d, expected %d).", - argc - 1, INFO_COMM + 1 - 1); - r = -EINVAL; - goto finish; - } - - /* Ignore all parse errors */ - parse_config(); - - log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); - log_debug("Selected compression %s.", yes_no(arg_compress)); - - r = parse_uid(argv[INFO_UID + 1], &uid); - if (r < 0) { - log_error("Failed to parse UID."); - goto finish; - } - - r = parse_pid(argv[INFO_PID + 1], &pid); - if (r < 0) { - log_error("Failed to parse PID."); - goto finish; - } - - r = parse_gid(argv[INFO_GID + 1], &gid); - if (r < 0) { - log_error("Failed to parse GID."); - goto finish; - } - - if (get_process_comm(pid, &comm) < 0) { - log_warning("Failed to get COMM, falling back to the command line."); - comm = strv_join(argv + INFO_COMM + 1, " "); - } - - if (get_process_exe(pid, &exe) < 0) - log_warning("Failed to get EXE."); - - info[INFO_PID] = argv[INFO_PID + 1]; - info[INFO_UID] = argv[INFO_UID + 1]; - info[INFO_GID] = argv[INFO_GID + 1]; - info[INFO_SIGNAL] = argv[INFO_SIGNAL + 1]; - info[INFO_TIMESTAMP] = argv[INFO_TIMESTAMP + 1]; - info[INFO_COMM] = comm; - info[INFO_EXE] = exe; - - if (cg_pid_get_unit(pid, &t) >= 0) { - - if (streq(t, SPECIAL_JOURNALD_SERVICE)) { - free(t); - - /* If we are journald, we cut things short, - * don't write to the journal, but still - * create a coredump. */ - - if (arg_storage != COREDUMP_STORAGE_NONE) - arg_storage = COREDUMP_STORAGE_EXTERNAL; - - r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); - if (r < 0) - goto finish; - - r = maybe_remove_external_coredump(filename, coredump_size); - if (r < 0) - goto finish; - - log_info("Detected coredump of the journal daemon itself, diverted to %s.", filename); - goto finish; - } - - core_unit = strjoina("COREDUMP_UNIT=", t); - free(t); - - } else if (cg_pid_get_user_unit(pid, &t) >= 0) { - core_unit = strjoina("COREDUMP_USER_UNIT=", t); - free(t); - } - - if (core_unit) - IOVEC_SET_STRING(iovec[j++], core_unit); - - /* OK, now we know it's not the journal, hence we can make use - * of it now. */ - log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); - log_open(); - - core_pid = strjoina("COREDUMP_PID=", info[INFO_PID]); - IOVEC_SET_STRING(iovec[j++], core_pid); - - core_uid = strjoina("COREDUMP_UID=", info[INFO_UID]); - IOVEC_SET_STRING(iovec[j++], core_uid); - - core_gid = strjoina("COREDUMP_GID=", info[INFO_GID]); - IOVEC_SET_STRING(iovec[j++], core_gid); - - core_signal = strjoina("COREDUMP_SIGNAL=", info[INFO_SIGNAL]); - IOVEC_SET_STRING(iovec[j++], core_signal); - - if (sd_pid_get_session(pid, &t) >= 0) { - core_session = strjoina("COREDUMP_SESSION=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_session); - } - - if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { - r = asprintf(&core_owner_uid, - "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); - if (r > 0) - IOVEC_SET_STRING(iovec[j++], core_owner_uid); - } - - if (sd_pid_get_slice(pid, &t) >= 0) { - core_slice = strjoina("COREDUMP_SLICE=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_slice); - } - - if (comm) { - core_comm = strjoina("COREDUMP_COMM=", comm); - IOVEC_SET_STRING(iovec[j++], core_comm); - } - - if (exe) { - core_exe = strjoina("COREDUMP_EXE=", exe); - IOVEC_SET_STRING(iovec[j++], core_exe); - } - - if (get_process_cmdline(pid, 0, false, &t) >= 0) { - core_cmdline = strjoina("COREDUMP_CMDLINE=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_cmdline); - } - - if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { - core_cgroup = strjoina("COREDUMP_CGROUP=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_cgroup); - } - - if (compose_open_fds(pid, &t) >= 0) { - core_open_fds = strappend("COREDUMP_OPEN_FDS=", t); - free(t); - - if (core_open_fds) - IOVEC_SET_STRING(iovec[j++], core_open_fds); - } - - p = procfs_file_alloca(pid, "status"); - if (read_full_file(p, &t, NULL) >= 0) { - core_proc_status = strappend("COREDUMP_PROC_STATUS=", t); - free(t); - - if (core_proc_status) - IOVEC_SET_STRING(iovec[j++], core_proc_status); - } - - p = procfs_file_alloca(pid, "maps"); - if (read_full_file(p, &t, NULL) >= 0) { - core_proc_maps = strappend("COREDUMP_PROC_MAPS=", t); - free(t); - - if (core_proc_maps) - IOVEC_SET_STRING(iovec[j++], core_proc_maps); - } - - p = procfs_file_alloca(pid, "limits"); - if (read_full_file(p, &t, NULL) >= 0) { - core_proc_limits = strappend("COREDUMP_PROC_LIMITS=", t); - free(t); - - if (core_proc_limits) - IOVEC_SET_STRING(iovec[j++], core_proc_limits); - } - - p = procfs_file_alloca(pid, "cgroup"); - if (read_full_file(p, &t, NULL) >=0) { - core_proc_cgroup = strappend("COREDUMP_PROC_CGROUP=", t); - free(t); - - if (core_proc_cgroup) - IOVEC_SET_STRING(iovec[j++], core_proc_cgroup); - } - - if (get_process_cwd(pid, &t) >= 0) { - core_cwd = strjoina("COREDUMP_CWD=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_cwd); - } - - if (get_process_root(pid, &t) >= 0) { - core_root = strjoina("COREDUMP_ROOT=", t); - free(t); - - IOVEC_SET_STRING(iovec[j++], core_root); - } - - if (get_process_environ(pid, &t) >= 0) { - core_environ = strappend("COREDUMP_ENVIRON=", t); - free(t); - - if (core_environ) - IOVEC_SET_STRING(iovec[j++], core_environ); - } - - core_timestamp = strjoin("COREDUMP_TIMESTAMP=", info[INFO_TIMESTAMP], "000000", NULL); - if (core_timestamp) - IOVEC_SET_STRING(iovec[j++], core_timestamp); - - IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); - - assert_cc(2 == LOG_CRIT); - IOVEC_SET_STRING(iovec[j++], "PRIORITY=2"); - - /* Vacuum before we write anything again */ - coredump_vacuum(-1, arg_keep_free, arg_max_use); - - /* Always stream the coredump to disk, if that's possible */ - r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); - if (r < 0) - /* skip whole core dumping part */ - goto log; - - /* If we don't want to keep the coredump on disk, remove it - * now, as later on we will lack the privileges for - * it. However, we keep the fd to it, so that we can still - * process it and log it. */ - r = maybe_remove_external_coredump(filename, coredump_size); - if (r < 0) - goto finish; - if (r == 0) { - const char *coredump_filename; - - coredump_filename = strjoina("COREDUMP_FILENAME=", filename); - IOVEC_SET_STRING(iovec[j++], coredump_filename); - } - - /* Vacuum again, but exclude the coredump we just created */ - coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); - - /* Now, let's drop privileges to become the user who owns the - * segfaulted process and allocate the coredump memory under - * the user's uid. This also ensures that the credentials - * journald will see are the ones of the coredumping user, - * thus making sure the user gets access to the core - * dump. Let's also get rid of all capabilities, if we run as - * root, we won't need them anymore. */ - r = drop_privileges(uid, gid, 0); - if (r < 0) { - log_error_errno(r, "Failed to drop privileges: %m"); - goto finish; - } - -#ifdef HAVE_ELFUTILS - /* Try to get a strack trace if we can */ - if (coredump_size <= arg_process_size_max) { - _cleanup_free_ char *stacktrace = NULL; - - r = coredump_make_stack_trace(coredump_fd, exe, &stacktrace); - if (r >= 0) - core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.\n\n", stacktrace, NULL); - else if (r == -EINVAL) - log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); - else - log_warning_errno(r, "Failed to generate stack trace: %m"); - } - - if (!core_message) -#endif -log: - core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.", NULL); - if (core_message) - IOVEC_SET_STRING(iovec[j++], core_message); - - /* Optionally store the entire coredump in the journal */ - if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) && - coredump_size <= arg_journal_size_max) { - size_t sz = 0; - - /* Store the coredump itself in the journal */ - - r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); - if (r >= 0) { - iovec[j].iov_base = coredump_data; - iovec[j].iov_len = sz; - j++; - } - } - - r = sd_journal_sendv(iovec, j); - if (r < 0) - log_error_errno(r, "Failed to log coredump: %m"); - -finish: - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/src/journal/coredump.conf b/src/journal/coredump.conf deleted file mode 100644 index c2f0643e03..0000000000 --- a/src/journal/coredump.conf +++ /dev/null @@ -1,21 +0,0 @@ -# This file is part of systemd. -# -# systemd is free software; you can redistribute it and/or modify it -# under the terms of the GNU Lesser General Public License as published by -# the Free Software Foundation; either version 2.1 of the License, or -# (at your option) any later version. -# -# Entries in this file show the compile time defaults. -# You can change settings by editing this file. -# Defaults can be restored by simply deleting this file. -# -# See coredump.conf(5) for details. - -[Coredump] -#Storage=external -#Compress=yes -#ProcessSizeMax=2G -#ExternalSizeMax=2G -#JournalSizeMax=767M -#MaxUse= -#KeepFree= diff --git a/src/journal/coredumpctl.c b/src/journal/coredumpctl.c deleted file mode 100644 index 0034a1a0ac..0000000000 --- a/src/journal/coredumpctl.c +++ /dev/null @@ -1,880 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2012 Zbigniew Jędrzejewski-Szmek - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include -#include -#include -#include -#include -#include - -#include "sd-journal.h" - -#include "alloc-util.h" -#include "compress.h" -#include "fd-util.h" -#include "fileio.h" -#include "journal-internal.h" -#include "log.h" -#include "macro.h" -#include "pager.h" -#include "parse-util.h" -#include "path-util.h" -#include "process-util.h" -#include "set.h" -#include "sigbus.h" -#include "signal-util.h" -#include "string-util.h" -#include "terminal-util.h" -#include "user-util.h" -#include "util.h" - -static enum { - ACTION_NONE, - ACTION_INFO, - ACTION_LIST, - ACTION_DUMP, - ACTION_GDB, -} arg_action = ACTION_LIST; -static const char* arg_field = NULL; -static const char *arg_directory = NULL; -static int arg_no_pager = false; -static int arg_no_legend = false; -static int arg_one = false; -static FILE* arg_output = NULL; - -static Set *new_matches(void) { - Set *set; - char *tmp; - int r; - - set = set_new(NULL); - if (!set) { - log_oom(); - return NULL; - } - - tmp = strdup("MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); - if (!tmp) { - log_oom(); - set_free(set); - return NULL; - } - - r = set_consume(set, tmp); - if (r < 0) { - log_error_errno(r, "failed to add to set: %m"); - set_free(set); - return NULL; - } - - return set; -} - -static int add_match(Set *set, const char *match) { - _cleanup_free_ char *p = NULL; - char *pattern = NULL; - const char* prefix; - pid_t pid; - int r; - - if (strchr(match, '=')) - prefix = ""; - else if (strchr(match, '/')) { - r = path_make_absolute_cwd(match, &p); - if (r < 0) - goto fail; - match = p; - prefix = "COREDUMP_EXE="; - } else if (parse_pid(match, &pid) >= 0) - prefix = "COREDUMP_PID="; - else - prefix = "COREDUMP_COMM="; - - pattern = strjoin(prefix, match, NULL); - if (!pattern) { - r = -ENOMEM; - goto fail; - } - - log_debug("Adding pattern: %s", pattern); - r = set_consume(set, pattern); - if (r < 0) - goto fail; - - return 0; -fail: - return log_error_errno(r, "Failed to add match: %m"); -} - -static void help(void) { - printf("%s [OPTIONS...]\n\n" - "List or retrieve coredumps from the journal.\n\n" - "Flags:\n" - " -h --help Show this help\n" - " --version Print version string\n" - " --no-pager Do not pipe output into a pager\n" - " --no-legend Do not print the column headers.\n" - " -1 Show information about most recent entry only\n" - " -F --field=FIELD List all values a certain field takes\n" - " -o --output=FILE Write output to FILE\n\n" - " -D --directory=DIR Use journal files from directory\n\n" - - "Commands:\n" - " list [MATCHES...] List available coredumps (default)\n" - " info [MATCHES...] Show detailed information about one or more coredumps\n" - " dump [MATCHES...] Print first matching coredump to stdout\n" - " gdb [MATCHES...] Start gdb for the first matching coredump\n" - , program_invocation_short_name); -} - -static int parse_argv(int argc, char *argv[], Set *matches) { - enum { - ARG_VERSION = 0x100, - ARG_NO_PAGER, - ARG_NO_LEGEND, - }; - - int r, c; - - static const struct option options[] = { - { "help", no_argument, NULL, 'h' }, - { "version" , no_argument, NULL, ARG_VERSION }, - { "no-pager", no_argument, NULL, ARG_NO_PAGER }, - { "no-legend", no_argument, NULL, ARG_NO_LEGEND }, - { "output", required_argument, NULL, 'o' }, - { "field", required_argument, NULL, 'F' }, - { "directory", required_argument, NULL, 'D' }, - {} - }; - - assert(argc >= 0); - assert(argv); - - while ((c = getopt_long(argc, argv, "ho:F:1D:", options, NULL)) >= 0) - switch(c) { - - case 'h': - arg_action = ACTION_NONE; - help(); - return 0; - - case ARG_VERSION: - arg_action = ACTION_NONE; - return version(); - - case ARG_NO_PAGER: - arg_no_pager = true; - break; - - case ARG_NO_LEGEND: - arg_no_legend = true; - break; - - case 'o': - if (arg_output) { - log_error("cannot set output more than once"); - return -EINVAL; - } - - arg_output = fopen(optarg, "we"); - if (!arg_output) - return log_error_errno(errno, "writing to '%s': %m", optarg); - - break; - - case 'F': - if (arg_field) { - log_error("cannot use --field/-F more than once"); - return -EINVAL; - } - arg_field = optarg; - break; - - case '1': - arg_one = true; - break; - - case 'D': - arg_directory = optarg; - break; - - case '?': - return -EINVAL; - - default: - assert_not_reached("Unhandled option"); - } - - if (optind < argc) { - const char *cmd = argv[optind++]; - if (streq(cmd, "list")) - arg_action = ACTION_LIST; - else if (streq(cmd, "dump")) - arg_action = ACTION_DUMP; - else if (streq(cmd, "gdb")) - arg_action = ACTION_GDB; - else if (streq(cmd, "info")) - arg_action = ACTION_INFO; - else { - log_error("Unknown action '%s'", cmd); - return -EINVAL; - } - } - - if (arg_field && arg_action != ACTION_LIST) { - log_error("Option --field/-F only makes sense with list"); - return -EINVAL; - } - - while (optind < argc) { - r = add_match(matches, argv[optind]); - if (r != 0) - return r; - optind++; - } - - return 0; -} - -static int retrieve(const void *data, - size_t len, - const char *name, - char **var) { - - size_t ident; - char *v; - - ident = strlen(name) + 1; /* name + "=" */ - - if (len < ident) - return 0; - - if (memcmp(data, name, ident - 1) != 0) - return 0; - - if (((const char*) data)[ident - 1] != '=') - return 0; - - v = strndup((const char*)data + ident, len - ident); - if (!v) - return log_oom(); - - free(*var); - *var = v; - - return 0; -} - -static void print_field(FILE* file, sd_journal *j) { - _cleanup_free_ char *value = NULL; - const void *d; - size_t l; - - assert(file); - assert(j); - - assert(arg_field); - - SD_JOURNAL_FOREACH_DATA(j, d, l) - retrieve(d, l, arg_field, &value); - - if (value) - fprintf(file, "%s\n", value); -} - -static int print_list(FILE* file, sd_journal *j, int had_legend) { - _cleanup_free_ char - *pid = NULL, *uid = NULL, *gid = NULL, - *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, - *filename = NULL; - const void *d; - size_t l; - usec_t t; - char buf[FORMAT_TIMESTAMP_MAX]; - int r; - bool present; - - assert(file); - assert(j); - - SD_JOURNAL_FOREACH_DATA(j, d, l) { - retrieve(d, l, "COREDUMP_PID", &pid); - retrieve(d, l, "COREDUMP_UID", &uid); - retrieve(d, l, "COREDUMP_GID", &gid); - retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); - retrieve(d, l, "COREDUMP_EXE", &exe); - retrieve(d, l, "COREDUMP_COMM", &comm); - retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); - retrieve(d, l, "COREDUMP_FILENAME", &filename); - } - - if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) { - log_warning("Empty coredump log entry"); - return -EINVAL; - } - - r = sd_journal_get_realtime_usec(j, &t); - if (r < 0) - return log_error_errno(r, "Failed to get realtime timestamp: %m"); - - format_timestamp(buf, sizeof(buf), t); - present = filename && access(filename, F_OK) == 0; - - if (!had_legend && !arg_no_legend) - fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", - FORMAT_TIMESTAMP_WIDTH, "TIME", - 6, "PID", - 5, "UID", - 5, "GID", - 3, "SIG", - 1, "PRESENT", - "EXE"); - - fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n", - FORMAT_TIMESTAMP_WIDTH, buf, - 6, strna(pid), - 5, strna(uid), - 5, strna(gid), - 3, strna(sgnl), - 1, present ? "*" : "", - strna(exe ?: (comm ?: cmdline))); - - return 0; -} - -static int print_info(FILE *file, sd_journal *j, bool need_space) { - _cleanup_free_ char - *pid = NULL, *uid = NULL, *gid = NULL, - *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, - *unit = NULL, *user_unit = NULL, *session = NULL, - *boot_id = NULL, *machine_id = NULL, *hostname = NULL, - *slice = NULL, *cgroup = NULL, *owner_uid = NULL, - *message = NULL, *timestamp = NULL, *filename = NULL; - const void *d; - size_t l; - int r; - - assert(file); - assert(j); - - SD_JOURNAL_FOREACH_DATA(j, d, l) { - retrieve(d, l, "COREDUMP_PID", &pid); - retrieve(d, l, "COREDUMP_UID", &uid); - retrieve(d, l, "COREDUMP_GID", &gid); - retrieve(d, l, "COREDUMP_SIGNAL", &sgnl); - retrieve(d, l, "COREDUMP_EXE", &exe); - retrieve(d, l, "COREDUMP_COMM", &comm); - retrieve(d, l, "COREDUMP_CMDLINE", &cmdline); - retrieve(d, l, "COREDUMP_UNIT", &unit); - retrieve(d, l, "COREDUMP_USER_UNIT", &user_unit); - retrieve(d, l, "COREDUMP_SESSION", &session); - retrieve(d, l, "COREDUMP_OWNER_UID", &owner_uid); - retrieve(d, l, "COREDUMP_SLICE", &slice); - retrieve(d, l, "COREDUMP_CGROUP", &cgroup); - retrieve(d, l, "COREDUMP_TIMESTAMP", ×tamp); - retrieve(d, l, "COREDUMP_FILENAME", &filename); - retrieve(d, l, "_BOOT_ID", &boot_id); - retrieve(d, l, "_MACHINE_ID", &machine_id); - retrieve(d, l, "_HOSTNAME", &hostname); - retrieve(d, l, "MESSAGE", &message); - } - - if (need_space) - fputs("\n", file); - - if (comm) - fprintf(file, - " PID: %s%s%s (%s)\n", - ansi_highlight(), strna(pid), ansi_normal(), comm); - else - fprintf(file, - " PID: %s%s%s\n", - ansi_highlight(), strna(pid), ansi_normal()); - - if (uid) { - uid_t n; - - if (parse_uid(uid, &n) >= 0) { - _cleanup_free_ char *u = NULL; - - u = uid_to_name(n); - fprintf(file, - " UID: %s (%s)\n", - uid, u); - } else { - fprintf(file, - " UID: %s\n", - uid); - } - } - - if (gid) { - gid_t n; - - if (parse_gid(gid, &n) >= 0) { - _cleanup_free_ char *g = NULL; - - g = gid_to_name(n); - fprintf(file, - " GID: %s (%s)\n", - gid, g); - } else { - fprintf(file, - " GID: %s\n", - gid); - } - } - - if (sgnl) { - int sig; - - if (safe_atoi(sgnl, &sig) >= 0) - fprintf(file, " Signal: %s (%s)\n", sgnl, signal_to_string(sig)); - else - fprintf(file, " Signal: %s\n", sgnl); - } - - if (timestamp) { - usec_t u; - - r = safe_atou64(timestamp, &u); - if (r >= 0) { - char absolute[FORMAT_TIMESTAMP_MAX], relative[FORMAT_TIMESPAN_MAX]; - - fprintf(file, - " Timestamp: %s (%s)\n", - format_timestamp(absolute, sizeof(absolute), u), - format_timestamp_relative(relative, sizeof(relative), u)); - - } else - fprintf(file, " Timestamp: %s\n", timestamp); - } - - if (cmdline) - fprintf(file, " Command Line: %s\n", cmdline); - if (exe) - fprintf(file, " Executable: %s%s%s\n", ansi_highlight(), exe, ansi_normal()); - if (cgroup) - fprintf(file, " Control Group: %s\n", cgroup); - if (unit) - fprintf(file, " Unit: %s\n", unit); - if (user_unit) - fprintf(file, " User Unit: %s\n", unit); - if (slice) - fprintf(file, " Slice: %s\n", slice); - if (session) - fprintf(file, " Session: %s\n", session); - if (owner_uid) { - uid_t n; - - if (parse_uid(owner_uid, &n) >= 0) { - _cleanup_free_ char *u = NULL; - - u = uid_to_name(n); - fprintf(file, - " Owner UID: %s (%s)\n", - owner_uid, u); - } else { - fprintf(file, - " Owner UID: %s\n", - owner_uid); - } - } - if (boot_id) - fprintf(file, " Boot ID: %s\n", boot_id); - if (machine_id) - fprintf(file, " Machine ID: %s\n", machine_id); - if (hostname) - fprintf(file, " Hostname: %s\n", hostname); - - if (filename && access(filename, F_OK) == 0) - fprintf(file, " Coredump: %s\n", filename); - - if (message) { - _cleanup_free_ char *m = NULL; - - m = strreplace(message, "\n", "\n "); - - fprintf(file, " Message: %s\n", strstrip(m ?: message)); - } - - return 0; -} - -static int focus(sd_journal *j) { - int r; - - r = sd_journal_seek_tail(j); - if (r == 0) - r = sd_journal_previous(j); - if (r < 0) - return log_error_errno(r, "Failed to search journal: %m"); - if (r == 0) { - log_error("No match found."); - return -ESRCH; - } - return r; -} - -static void print_entry(sd_journal *j, unsigned n_found) { - assert(j); - - if (arg_action == ACTION_INFO) - print_info(stdout, j, n_found); - else if (arg_field) - print_field(stdout, j); - else - print_list(stdout, j, n_found); -} - -static int dump_list(sd_journal *j) { - unsigned n_found = 0; - int r; - - assert(j); - - /* The coredumps are likely to compressed, and for just - * listing them we don't need to decompress them, so let's - * pick a fairly low data threshold here */ - sd_journal_set_data_threshold(j, 4096); - - if (arg_one) { - r = focus(j); - if (r < 0) - return r; - - print_entry(j, 0); - } else { - SD_JOURNAL_FOREACH(j) - print_entry(j, n_found++); - - if (!arg_field && n_found <= 0) { - log_notice("No coredumps found."); - return -ESRCH; - } - } - - return 0; -} - -static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) { - const char *data; - _cleanup_free_ char *filename = NULL; - size_t len; - int r; - - assert((fd >= 0) != !!path); - assert(!!path == !!unlink_temp); - - /* Prefer uncompressed file to journal (probably cached) to - * compressed file (probably uncached). */ - r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len); - if (r < 0 && r != -ENOENT) - log_warning_errno(r, "Failed to retrieve COREDUMP_FILENAME: %m"); - else if (r == 0) - retrieve(data, len, "COREDUMP_FILENAME", &filename); - - if (filename && access(filename, R_OK) < 0) { - log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING, - "File %s is not readable: %m", filename); - filename = mfree(filename); - } - - if (filename && !endswith(filename, ".xz") && !endswith(filename, ".lz4")) { - if (path) { - *path = filename; - filename = NULL; - } - - return 0; - } else { - _cleanup_close_ int fdt = -1; - char *temp = NULL; - - if (fd < 0) { - temp = strdup("/var/tmp/coredump-XXXXXX"); - if (!temp) - return log_oom(); - - fdt = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC); - if (fdt < 0) - return log_error_errno(fdt, "Failed to create temporary file: %m"); - log_debug("Created temporary file %s", temp); - - fd = fdt; - } - - r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len); - if (r == 0) { - ssize_t sz; - - assert(len >= 9); - data += 9; - len -= 9; - - sz = write(fdt, data, len); - if (sz < 0) { - r = log_error_errno(errno, - "Failed to write temporary file: %m"); - goto error; - } - if (sz != (ssize_t) len) { - log_error("Short write to temporary file."); - r = -EIO; - goto error; - } - } else if (filename) { -#if defined(HAVE_XZ) || defined(HAVE_LZ4) - _cleanup_close_ int fdf; - - fdf = open(filename, O_RDONLY | O_CLOEXEC); - if (fdf < 0) { - r = log_error_errno(errno, - "Failed to open %s: %m", - filename); - goto error; - } - - r = decompress_stream(filename, fdf, fd, -1); - if (r < 0) { - log_error_errno(r, "Failed to decompress %s: %m", filename); - goto error; - } -#else - log_error("Cannot decompress file. Compiled without compression support."); - r = -EOPNOTSUPP; - goto error; -#endif - } else { - if (r == -ENOENT) - log_error("Cannot retrieve coredump from journal nor disk."); - else - log_error_errno(r, "Failed to retrieve COREDUMP field: %m"); - goto error; - } - - if (temp) { - *path = temp; - *unlink_temp = true; - } - - return 0; - -error: - if (temp) { - unlink(temp); - log_debug("Removed temporary file %s", temp); - } - return r; - } -} - -static int dump_core(sd_journal* j) { - int r; - - assert(j); - - r = focus(j); - if (r < 0) - return r; - - print_info(arg_output ? stdout : stderr, j, false); - - if (on_tty() && !arg_output) { - log_error("Refusing to dump core to tty."); - return -ENOTTY; - } - - r = save_core(j, arg_output ? fileno(arg_output) : STDOUT_FILENO, NULL, NULL); - if (r < 0) - return log_error_errno(r, "Coredump retrieval failed: %m"); - - r = sd_journal_previous(j); - if (r >= 0) - log_warning("More than one entry matches, ignoring rest."); - - return 0; -} - -static int run_gdb(sd_journal *j) { - _cleanup_free_ char *exe = NULL, *path = NULL; - bool unlink_path = false; - const char *data; - siginfo_t st; - size_t len; - pid_t pid; - int r; - - assert(j); - - r = focus(j); - if (r < 0) - return r; - - print_info(stdout, j, false); - fputs("\n", stdout); - - r = sd_journal_get_data(j, "COREDUMP_EXE", (const void**) &data, &len); - if (r < 0) - return log_error_errno(r, "Failed to retrieve COREDUMP_EXE field: %m"); - - assert(len > strlen("COREDUMP_EXE=")); - data += strlen("COREDUMP_EXE="); - len -= strlen("COREDUMP_EXE="); - - exe = strndup(data, len); - if (!exe) - return log_oom(); - - if (endswith(exe, " (deleted)")) { - log_error("Binary already deleted."); - return -ENOENT; - } - - if (!path_is_absolute(exe)) { - log_error("Binary is not an absolute path."); - return -ENOENT; - } - - r = save_core(j, -1, &path, &unlink_path); - if (r < 0) - return log_error_errno(r, "Failed to retrieve core: %m"); - - pid = fork(); - if (pid < 0) { - r = log_error_errno(errno, "Failed to fork(): %m"); - goto finish; - } - if (pid == 0) { - (void) reset_all_signal_handlers(); - (void) reset_signal_mask(); - - execlp("gdb", "gdb", exe, path, NULL); - - log_error_errno(errno, "Failed to invoke gdb: %m"); - _exit(1); - } - - r = wait_for_terminate(pid, &st); - if (r < 0) { - log_error_errno(r, "Failed to wait for gdb: %m"); - goto finish; - } - - r = st.si_code == CLD_EXITED ? st.si_status : 255; - -finish: - if (unlink_path) { - log_debug("Removed temporary file %s", path); - unlink(path); - } - - return r; -} - -int main(int argc, char *argv[]) { - _cleanup_(sd_journal_closep) sd_journal*j = NULL; - const char* match; - Iterator it; - int r = 0; - _cleanup_set_free_free_ Set *matches = NULL; - - setlocale(LC_ALL, ""); - log_parse_environment(); - log_open(); - - matches = new_matches(); - if (!matches) { - r = -ENOMEM; - goto end; - } - - r = parse_argv(argc, argv, matches); - if (r < 0) - goto end; - - if (arg_action == ACTION_NONE) - goto end; - - sigbus_install(); - - if (arg_directory) { - r = sd_journal_open_directory(&j, arg_directory, 0); - if (r < 0) { - log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory); - goto end; - } - } else { - r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY); - if (r < 0) { - log_error_errno(r, "Failed to open journal: %m"); - goto end; - } - } - - /* We want full data, nothing truncated. */ - sd_journal_set_data_threshold(j, 0); - - SET_FOREACH(match, matches, it) { - r = sd_journal_add_match(j, match, strlen(match)); - if (r != 0) { - log_error_errno(r, "Failed to add match '%s': %m", - match); - goto end; - } - } - - if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) { - _cleanup_free_ char *filter; - - filter = journal_make_match_string(j); - log_debug("Journal filter: %s", filter); - } - - switch(arg_action) { - - case ACTION_LIST: - case ACTION_INFO: - if (!arg_no_pager) - pager_open(false); - - r = dump_list(j); - break; - - case ACTION_DUMP: - r = dump_core(j); - break; - - case ACTION_GDB: - r = run_gdb(j); - break; - - default: - assert_not_reached("Shouldn't be here"); - } - -end: - pager_close(); - - if (arg_output) - fclose(arg_output); - - return r >= 0 ? r : EXIT_FAILURE; -} diff --git a/src/journal/stacktrace.c b/src/journal/stacktrace.c deleted file mode 100644 index 68806992fc..0000000000 --- a/src/journal/stacktrace.c +++ /dev/null @@ -1,200 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2014 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include -#include - -#include "alloc-util.h" -#include "fd-util.h" -#include "formats-util.h" -#include "macro.h" -#include "stacktrace.h" -#include "string-util.h" -#include "util.h" - -#define FRAMES_MAX 64 -#define THREADS_MAX 64 - -struct stack_context { - FILE *f; - Dwfl *dwfl; - Elf *elf; - unsigned n_thread; - unsigned n_frame; -}; - -static int frame_callback(Dwfl_Frame *frame, void *userdata) { - struct stack_context *c = userdata; - Dwarf_Addr pc, pc_adjusted, bias = 0; - _cleanup_free_ Dwarf_Die *scopes = NULL; - const char *fname = NULL, *symbol = NULL; - Dwfl_Module *module; - bool is_activation; - - assert(frame); - assert(c); - - if (c->n_frame >= FRAMES_MAX) - return DWARF_CB_ABORT; - - if (!dwfl_frame_pc(frame, &pc, &is_activation)) - return DWARF_CB_ABORT; - - pc_adjusted = pc - (is_activation ? 0 : 1); - - module = dwfl_addrmodule(c->dwfl, pc_adjusted); - if (module) { - Dwarf_Die *s, *cudie; - int n; - - cudie = dwfl_module_addrdie(module, pc_adjusted, &bias); - if (cudie) { - n = dwarf_getscopes(cudie, pc_adjusted - bias, &scopes); - for (s = scopes; s < scopes + n; s++) { - if (IN_SET(dwarf_tag(s), DW_TAG_subprogram, DW_TAG_inlined_subroutine, DW_TAG_entry_point)) { - Dwarf_Attribute *a, space; - - a = dwarf_attr_integrate(s, DW_AT_MIPS_linkage_name, &space); - if (!a) - a = dwarf_attr_integrate(s, DW_AT_linkage_name, &space); - if (a) - symbol = dwarf_formstring(a); - if (!symbol) - symbol = dwarf_diename(s); - - if (symbol) - break; - } - } - } - - if (!symbol) - symbol = dwfl_module_addrname(module, pc_adjusted); - - fname = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, NULL, NULL); - } - - fprintf(c->f, "#%-2u 0x%016" PRIx64 " %s (%s)\n", c->n_frame, (uint64_t) pc, strna(symbol), strna(fname)); - c->n_frame ++; - - return DWARF_CB_OK; -} - -static int thread_callback(Dwfl_Thread *thread, void *userdata) { - struct stack_context *c = userdata; - pid_t tid; - - assert(thread); - assert(c); - - if (c->n_thread >= THREADS_MAX) - return DWARF_CB_ABORT; - - if (c->n_thread != 0) - fputc('\n', c->f); - - c->n_frame = 0; - - tid = dwfl_thread_tid(thread); - fprintf(c->f, "Stack trace of thread " PID_FMT ":\n", tid); - - if (dwfl_thread_getframes(thread, frame_callback, c) < 0) - return DWARF_CB_ABORT; - - c->n_thread ++; - - return DWARF_CB_OK; -} - -int coredump_make_stack_trace(int fd, const char *executable, char **ret) { - - static const Dwfl_Callbacks callbacks = { - .find_elf = dwfl_build_id_find_elf, - .find_debuginfo = dwfl_standard_find_debuginfo, - }; - - struct stack_context c = {}; - char *buf = NULL; - size_t sz = 0; - int r; - - assert(fd >= 0); - assert(ret); - - if (lseek(fd, 0, SEEK_SET) == (off_t) -1) - return -errno; - - c.f = open_memstream(&buf, &sz); - if (!c.f) - return -ENOMEM; - - elf_version(EV_CURRENT); - - c.elf = elf_begin(fd, ELF_C_READ_MMAP, NULL); - if (!c.elf) { - r = -EINVAL; - goto finish; - } - - c.dwfl = dwfl_begin(&callbacks); - if (!c.dwfl) { - r = -EINVAL; - goto finish; - } - - if (dwfl_core_file_report(c.dwfl, c.elf, executable) < 0) { - r = -EINVAL; - goto finish; - } - - if (dwfl_report_end(c.dwfl, NULL, NULL) != 0) { - r = -EINVAL; - goto finish; - } - - if (dwfl_core_file_attach(c.dwfl, c.elf) < 0) { - r = -EINVAL; - goto finish; - } - - if (dwfl_getthreads(c.dwfl, thread_callback, &c) < 0) { - r = -EINVAL; - goto finish; - } - - c.f = safe_fclose(c.f); - - *ret = buf; - buf = NULL; - - r = 0; - -finish: - if (c.dwfl) - dwfl_end(c.dwfl); - - if (c.elf) - elf_end(c.elf); - - safe_fclose(c.f); - - free(buf); - - return r; -} diff --git a/src/journal/stacktrace.h b/src/journal/stacktrace.h deleted file mode 100644 index 15e9c04465..0000000000 --- a/src/journal/stacktrace.h +++ /dev/null @@ -1,22 +0,0 @@ -#pragma once - -/*** - This file is part of systemd. - - Copyright 2014 Lennart Poettering - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -int coredump_make_stack_trace(int fd, const char *executable, char **ret); diff --git a/src/journal/test-coredump-vacuum.c b/src/journal/test-coredump-vacuum.c deleted file mode 100644 index 70a57f183f..0000000000 --- a/src/journal/test-coredump-vacuum.c +++ /dev/null @@ -1,30 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2012 Zbigniew Jędrzejewski-Szmek - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see . -***/ - -#include - -#include "coredump-vacuum.h" - -int main(int argc, char *argv[]) { - - if (coredump_vacuum(-1, (uint64_t) -1, 70 * 1024) < 0) - return EXIT_FAILURE; - - return EXIT_SUCCESS; -} -- cgit v1.2.3-54-g00ecf