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Diffstat (limited to 'src/grp-coredump/coredumpctl/coredumpctl.c')
-rw-r--r--src/grp-coredump/coredumpctl/coredumpctl.c939
1 files changed, 939 insertions, 0 deletions
diff --git a/src/grp-coredump/coredumpctl/coredumpctl.c b/src/grp-coredump/coredumpctl/coredumpctl.c
new file mode 100644
index 0000000000..083bbccb32
--- /dev/null
+++ b/src/grp-coredump/coredumpctl/coredumpctl.c
@@ -0,0 +1,939 @@
+/***
+ 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 <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <systemd/sd-journal.h>
+
+#include "sd-journal/compress.h"
+#include "sd-journal/journal-internal.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/fs-util.h"
+#include "systemd-basic/log.h"
+#include "systemd-basic/macro.h"
+#include "systemd-basic/parse-util.h"
+#include "systemd-basic/path-util.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/set.h"
+#include "systemd-basic/sigbus.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/terminal-util.h"
+#include "systemd-basic/user-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/pager.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 bool 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 1;
+}
+
+static int print_field(FILE* file, sd_journal *j) {
+ const void *d;
+ size_t l;
+
+ assert(file);
+ assert(j);
+
+ assert(arg_field);
+
+ /* A (user-specified) field may appear more than once for a given entry.
+ * We will print all of the occurences.
+ * This is different below for fields that systemd-coredump uses,
+ * because they cannot meaningfully appear more than once.
+ */
+ SD_JOURNAL_FOREACH_DATA(j, d, l) {
+ _cleanup_free_ char *value = NULL;
+ int r;
+
+ r = retrieve(d, l, arg_field, &value);
+ if (r < 0)
+ return r;
+ if (r > 0)
+ fprintf(file, "%s\n", value);
+ }
+
+ return 0;
+}
+
+#define RETRIEVE(d, l, name, arg) \
+ { \
+ int _r = retrieve(d, l, name, &arg); \
+ if (_r < 0) \
+ return _r; \
+ if (_r > 0) \
+ continue; \
+ }
+
+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, *coredump = NULL;
+ const void *d;
+ size_t l;
+ usec_t t;
+ char buf[FORMAT_TIMESTAMP_MAX];
+ int r;
+ const char *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);
+ RETRIEVE(d, l, "COREDUMP", coredump);
+ }
+
+ 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);
+
+ 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",
+ 8, "COREFILE",
+ "EXE");
+
+ if (filename)
+ if (access(filename, R_OK) == 0)
+ present = "present";
+ else if (errno == ENOENT)
+ present = "missing";
+ else
+ present = "error";
+ else if (coredump)
+ present = "journal";
+ else
+ present = "none";
+
+ 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),
+ 8, 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,
+ *coredump = 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", timestamp);
+ RETRIEVE(d, l, "COREDUMP_FILENAME", filename);
+ RETRIEVE(d, l, "COREDUMP", coredump);
+ 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", user_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)
+ fprintf(file, " Storage: %s%s\n", filename,
+ access(filename, R_OK) < 0 ? " (inaccessible)" : "");
+ else if (coredump)
+ fprintf(file, " Storage: journal\n");
+ else
+ fprintf(file, " Storage: none\n");
+
+ 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 int print_entry(sd_journal *j, unsigned n_found) {
+ assert(j);
+
+ if (arg_action == ACTION_INFO)
+ return print_info(stdout, j, n_found);
+ else if (arg_field)
+ return print_field(stdout, j);
+ else
+ return 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;
+
+ return print_entry(j, 0);
+ } else {
+ SD_JOURNAL_FOREACH(j) {
+ r = print_entry(j, n_found++);
+ if (r < 0)
+ return r;
+ }
+
+ if (!arg_field && n_found <= 0) {
+ log_notice("No coredumps found.");
+ return -ESRCH;
+ }
+ }
+
+ return 0;
+}
+
+static int save_core(sd_journal *j, FILE *file, char **path, bool *unlink_temp) {
+ const char *data;
+ _cleanup_free_ char *filename = NULL;
+ size_t len;
+ int r, fd;
+ _cleanup_close_ int fdt = -1;
+ char *temp = NULL;
+
+ assert(!(file && path)); /* At most one can be specified */
+ assert(!!path == !!unlink_temp); /* Those must be specified together */
+
+ /* Look for a coredump on disk first. */
+ r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len);
+ if (r == 0)
+ retrieve(data, len, "COREDUMP_FILENAME", &filename);
+ else {
+ if (r != -ENOENT)
+ return log_error_errno(r, "Failed to retrieve COREDUMP_FILENAME field: %m");
+ /* Check that we can have a COREDUMP field. We still haven't set a high
+ * data threshold, so we'll get a few kilobytes at most.
+ */
+
+ r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len);
+ if (r == -ENOENT)
+ return log_error_errno(r, "Coredump entry has no core attached (neither internally in the journal nor externally on disk).");
+ if (r < 0)
+ return log_error_errno(r, "Failed to retrieve COREDUMP field: %m");
+ }
+
+ if (filename) {
+ if (access(filename, R_OK) < 0)
+ return log_error_errno(errno, "File \"%s\" is not readable: %m", filename);
+
+ if (path && !endswith(filename, ".xz") && !endswith(filename, ".lz4")) {
+ *path = filename;
+ filename = NULL;
+
+ return 0;
+ }
+ }
+
+ if (path) {
+ const char *vt;
+
+ /* Create a temporary file to write the uncompressed core to. */
+
+ r = var_tmp_dir(&vt);
+ if (r < 0)
+ return log_error_errno(r, "Failed to acquire temporary directory path: %m");
+
+ temp = strjoin(vt, "/coredump-XXXXXX", NULL);
+ if (!temp)
+ return log_oom();
+
+ fdt = mkostemp_safe(temp);
+ if (fdt < 0)
+ return log_error_errno(fdt, "Failed to create temporary file: %m");
+ log_debug("Created temporary file %s", temp);
+
+ fd = fdt;
+ } else {
+ /* If neither path or file are specified, we will write to stdout. Let's now check
+ * if stdout is connected to a tty. We checked that the file exists, or that the
+ * core might be stored in the journal. In this second case, if we found the entry,
+ * in all likelyhood we will be able to access the COREDUMP= field. In either case,
+ * we stop before doing any "real" work, i.e. before starting decompression or
+ * reading from the file or creating temporary files.
+ */
+ if (!file) {
+ if (on_tty())
+ return log_error_errno(ENOTTY, "Refusing to dump core to tty"
+ " (use shell redirection or specify --output).");
+ file = stdout;
+ }
+
+ fd = fileno(file);
+ }
+
+ 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 {
+ ssize_t sz;
+
+ /* We want full data, nothing truncated. */
+ sd_journal_set_data_threshold(j, 0);
+
+ r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len);
+ if (r < 0)
+ return log_error_errno(r, "Failed to retrieve COREDUMP field: %m");
+
+ assert(len >= 9);
+ data += 9;
+ len -= 9;
+
+ sz = write(fd, data, len);
+ if (sz < 0) {
+ r = log_error_errno(errno, "Failed to write output: %m");
+ goto error;
+ }
+ if (sz != (ssize_t) len) {
+ log_error("Short write to output.");
+ r = -EIO;
+ 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);
+
+ r = save_core(j, arg_output, NULL, NULL);
+ if (r < 0)
+ return r;
+
+ 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, NULL, &path, &unlink_path);
+ if (r < 0)
+ return r;
+
+ 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;
+ }
+ }
+
+ 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:
+ pager_open(arg_no_pager, 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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 10:29:58 +0000