/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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 <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <unistd.h> #include <stdio.h> #include <sys/prctl.h> #include <sys/types.h> #include <sys/xattr.h> #ifdef HAVE_ELFUTILS # include <dwarf.h> # include <elfutils/libdwfl.h> #endif #include "systemd/sd-journal.h" #include "systemd/sd-login.h" #include "log.h" #include "util.h" #include "fileio.h" #include "strv.h" #include "macro.h" #include "mkdir.h" #include "special.h" #include "cgroup-util.h" #include "journald-native.h" #include "conf-parser.h" #include "copy.h" #include "stacktrace.h" #include "path-util.h" #include "compress.h" #include "coredump-vacuum.h" #ifdef HAVE_ACL # include <sys/acl.h> # include "acl-util.h" #endif /* The maximum size up to which we process coredumps */ #define PROCESS_SIZE_MAX ((off_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 off_t arg_process_size_max = PROCESS_SIZE_MAX; static off_t arg_external_size_max = EXTERNAL_SIZE_MAX; static size_t arg_journal_size_max = JOURNAL_SIZE_MAX; static off_t arg_keep_free = (off_t) -1; static off_t arg_max_use = (off_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_off, 0, &arg_process_size_max }, { "Coredump", "ExternalSizeMax", config_parse_iec_off, 0, &arg_external_size_max }, { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, { "Coredump", "KeepFree", config_parse_iec_off, 0, &arg_keep_free }, { "Coredump", "MaxUse", config_parse_iec_off, 0, &arg_max_use }, {} }; return config_parse(NULL, "/etc/systemd/coredump.conf", NULL, "Coredump\0", config_item_table_lookup, items, false, false, true, 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; 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 || calc_acl_mask_if_needed(&acl) < 0) { log_warning_errno(errno, "Failed to patch ACL: %m"); return -errno; } 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, off_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_fd, off_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_fd); assert(ret_size); r = make_filename(info, &fn); if (r < 0) return log_error_errno(r, "Failed to determine coredump file name: %m"); tmp = tempfn_random(fn); if (!tmp) return log_oom(); 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); 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; } tmp_compressed = tempfn_random(fn_compressed); if (!tmp_compressed) { log_oom(); 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_fd = fd; /* uncompressed */ *ret_size = st.st_size; /* uncompressed */ fn_compressed = NULL; fd = -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_fd = fd; *ret_size = 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; fclose(stream); stream = NULL; 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; struct iovec iovec[26]; off_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_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 = strappenda("COREDUMP_UNIT=", t); free(t); } else if (cg_pid_get_user_unit(pid, &t) >= 0) { core_unit = strappenda("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 = strappenda("COREDUMP_PID=", info[INFO_PID]); IOVEC_SET_STRING(iovec[j++], core_pid); core_uid = strappenda("COREDUMP_UID=", info[INFO_UID]); IOVEC_SET_STRING(iovec[j++], core_uid); core_gid = strappenda("COREDUMP_GID=", info[INFO_GID]); IOVEC_SET_STRING(iovec[j++], core_gid); core_signal = strappenda("COREDUMP_SIGNAL=", info[INFO_SIGNAL]); IOVEC_SET_STRING(iovec[j++], core_signal); if (sd_pid_get_session(pid, &t) >= 0) { core_session = strappenda("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 = strappenda("COREDUMP_SLICE=", t); free(t); IOVEC_SET_STRING(iovec[j++], core_slice); } if (comm) { core_comm = strappenda("COREDUMP_COMM=", comm); IOVEC_SET_STRING(iovec[j++], core_comm); } if (exe) { core_exe = strappenda("COREDUMP_EXE=", exe); IOVEC_SET_STRING(iovec[j++], core_exe); } if (get_process_cmdline(pid, 0, false, &t) >= 0) { core_cmdline = strappenda("COREDUMP_CMDLINE=", t); free(t); IOVEC_SET_STRING(iovec[j++], core_cmdline); } if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { core_cgroup = strappenda("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 = strappenda("COREDUMP_CWD=", t); free(t); IOVEC_SET_STRING(iovec[j++], core_cwd); } if (get_process_root(pid, &t) >= 0) { core_root = strappenda("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"); 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_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 = strappenda("COREDUMP_FILENAME=", filename); IOVEC_SET_STRING(iovec[j++], coredump_filename); } /* Vacuum again, but exclude the coredump we just created */ coredump_vacuum(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. */ if (setresgid(gid, gid, gid) < 0 || setresuid(uid, uid, uid) < 0) { log_error_errno(errno, "Failed to drop privileges: %m"); r = -errno; 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 <= (off_t) arg_journal_size_max) { size_t sz; /* 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; }