/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include #include #include #include #include #include "sd-bus.h" #include "sd-journal.h" #include "sd-messages.h" #include "alloc-util.h" #include "bus-error.h" #include "bus-util.h" #include "compress.h" #include "def.h" #include "fd-util.h" #include "format-table.h" #include "fs-util.h" #include "glob-util.h" #include "journal-internal.h" #include "journal-util.h" #include "log.h" #include "macro.h" #include "main-func.h" #include "pager.h" #include "parse-argument.h" #include "parse-util.h" #include "path-util.h" #include "pretty-print.h" #include "process-util.h" #include "rlimit-util.h" #include "sigbus.h" #include "signal-util.h" #include "string-util.h" #include "strv.h" #include "terminal-util.h" #include "tmpfile-util.h" #include "user-util.h" #include "util.h" #include "verbs.h" #define SHORT_BUS_CALL_TIMEOUT_USEC (3 * USEC_PER_SEC) static usec_t arg_since = USEC_INFINITY, arg_until = USEC_INFINITY; static const char* arg_field = NULL; static const char *arg_debugger = NULL; static char **arg_debugger_args = NULL; static const char *arg_directory = NULL; static char **arg_file = NULL; static JsonFormatFlags arg_json_format_flags = JSON_FORMAT_OFF; static PagerFlags arg_pager_flags = 0; static int arg_legend = true; static size_t arg_rows_max = SIZE_MAX; static const char* arg_output = NULL; static bool arg_reverse = false; static bool arg_quiet = false; static bool arg_all = false; STATIC_DESTRUCTOR_REGISTER(arg_debugger_args, strv_freep); STATIC_DESTRUCTOR_REGISTER(arg_file, strv_freep); static int add_match(sd_journal *j, const char *match) { _cleanup_free_ char *p = NULL; const char* prefix, *pattern; pid_t pid; int r; if (strchr(match, '=')) prefix = ""; else if (strchr(match, '/')) { r = path_make_absolute_cwd(match, &p); if (r < 0) return log_error_errno(r, "path_make_absolute_cwd(\"%s\"): %m", match); match = p; prefix = "COREDUMP_EXE="; } else if (parse_pid(match, &pid) >= 0) prefix = "COREDUMP_PID="; else prefix = "COREDUMP_COMM="; pattern = strjoina(prefix, match); log_debug("Adding match: %s", pattern); r = sd_journal_add_match(j, pattern, 0); if (r < 0) return log_error_errno(r, "Failed to add match \"%s\": %m", match); return 0; } static int add_matches(sd_journal *j, char **matches) { char **match; int r; r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR, 0); if (r < 0) return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR); r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR, 0); if (r < 0) return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR); STRV_FOREACH(match, matches) { r = add_match(j, *match); if (r < 0) return r; } return 0; } static int acquire_journal(sd_journal **ret, char **matches) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; int r; assert(ret); if (arg_directory) { r = sd_journal_open_directory(&j, arg_directory, 0); if (r < 0) return log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory); } else if (arg_file) { r = sd_journal_open_files(&j, (const char**)arg_file, 0); if (r < 0) return log_error_errno(r, "Failed to open journal files: %m"); } else { r = sd_journal_open(&j, arg_all ? 0 : SD_JOURNAL_LOCAL_ONLY); if (r < 0) return log_error_errno(r, "Failed to open journal: %m"); } r = journal_access_check_and_warn(j, arg_quiet, true); if (r < 0) return r; r = add_matches(j, matches); if (r < 0) return r; if (DEBUG_LOGGING) { _cleanup_free_ char *filter = NULL; filter = journal_make_match_string(j); log_debug("Journal filter: %s", filter); } *ret = TAKE_PTR(j); return 0; } static int verb_help(int argc, char **argv, void *userdata) { _cleanup_free_ char *link = NULL; int r; r = terminal_urlify_man("coredumpctl", "1", &link); if (r < 0) return log_oom(); printf("%1$s [OPTIONS...] COMMAND ...\n\n" "%5$sList or retrieve coredumps from the journal.%6$s\n" "\n%3$sCommands:%4$s\n" " list [MATCHES...] List available coredumps (default)\n" " info [MATCHES...] Show detailed information about one or more coredumps\n" " dump [MATCHES...] Print first matching coredump to stdout\n" " debug [MATCHES...] Start a debugger for the first matching coredump\n" "\n%3$sOptions:%4$s\n" " -h --help Show this help\n" " --version Print version string\n" " --no-pager Do not pipe output into a pager\n" " --no-legend Do not print the column headers\n" " --json=pretty|short|off\n" " Generate JSON output\n" " --debugger=DEBUGGER Use the given debugger\n" " -A --debugger-arguments=ARGS Pass the given arguments to the debugger\n" " -n INT Show maximum number of rows\n" " -1 Show information about most recent entry only\n" " -S --since=DATE Only print coredumps since the date\n" " -U --until=DATE Only print coredumps until the date\n" " -r --reverse Show the newest entries first\n" " -F --field=FIELD List all values a certain field takes\n" " -o --output=FILE Write output to FILE\n" " --file=PATH Use journal file\n" " -D --directory=DIR Use journal files from directory\n\n" " -q --quiet Do not show info messages and privilege warning\n" " --all Look at all journal files instead of local ones\n" "\nSee the %2$s for details.\n", program_invocation_short_name, link, ansi_underline(), ansi_normal(), ansi_highlight(), ansi_normal()); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_PAGER, ARG_NO_LEGEND, ARG_JSON, ARG_DEBUGGER, ARG_FILE, ARG_ALL, }; int c, r; 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 }, { "debugger", required_argument, NULL, ARG_DEBUGGER }, { "debugger-arguments", required_argument, NULL, 'A' }, { "output", required_argument, NULL, 'o' }, { "field", required_argument, NULL, 'F' }, { "file", required_argument, NULL, ARG_FILE }, { "directory", required_argument, NULL, 'D' }, { "reverse", no_argument, NULL, 'r' }, { "since", required_argument, NULL, 'S' }, { "until", required_argument, NULL, 'U' }, { "quiet", no_argument, NULL, 'q' }, { "json", required_argument, NULL, ARG_JSON }, { "all", no_argument, NULL, ARG_ALL }, {} }; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "hA:o:F:1D:rS:U:qn:", options, NULL)) >= 0) switch(c) { case 'h': return verb_help(0, NULL, NULL); case ARG_VERSION: return version(); case ARG_NO_PAGER: arg_pager_flags |= PAGER_DISABLE; break; case ARG_NO_LEGEND: arg_legend = false; break; case ARG_DEBUGGER: arg_debugger = optarg; break; case 'A': { _cleanup_strv_free_ char **l = NULL; r = strv_split_full(&l, optarg, WHITESPACE, EXTRACT_UNQUOTE); if (r < 0) return log_error_errno(r, "Failed to parse debugger arguments '%s': %m", optarg); strv_free_and_replace(arg_debugger_args, l); break; } case ARG_FILE: r = glob_extend(&arg_file, optarg, GLOB_NOCHECK); if (r < 0) return log_error_errno(r, "Failed to add paths: %m"); break; case 'o': if (arg_output) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot set output more than once."); arg_output = optarg; break; case 'S': r = parse_timestamp(optarg, &arg_since); if (r < 0) return log_error_errno(r, "Failed to parse timestamp '%s': %m", optarg); break; case 'U': r = parse_timestamp(optarg, &arg_until); if (r < 0) return log_error_errno(r, "Failed to parse timestamp '%s': %m", optarg); break; case 'F': if (arg_field) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Cannot use --field/-F more than once."); arg_field = optarg; break; case '1': arg_rows_max = 1; arg_reverse = true; break; case 'n': { unsigned n; r = safe_atou(optarg, &n); if (r < 0 || n < 1) return log_error_errno(r < 0 ? r : SYNTHETIC_ERRNO(EINVAL), "Invalid numeric parameter to -n: %s", optarg); arg_rows_max = n; break; } case 'D': arg_directory = optarg; break; case 'r': arg_reverse = true; break; case 'q': arg_quiet = true; break; case ARG_JSON: r = parse_json_argument(optarg, &arg_json_format_flags); if (r <= 0) return r; break; case ARG_ALL: arg_all = true; break; case '?': return -EINVAL; default: assert_not_reached(); } if (arg_since != USEC_INFINITY && arg_until != USEC_INFINITY && arg_since > arg_until) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--since= must be before --until=."); return 1; } 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_and_replace(*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 occurrences. * 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 void analyze_coredump_file( const char *path, const char **ret_state, const char **ret_color, uint64_t *ret_size) { _cleanup_close_ int fd = -1; struct stat st; int r; assert(path); assert(ret_state); assert(ret_color); assert(ret_size); fd = open(path, O_PATH|O_CLOEXEC); if (fd < 0) { if (errno == ENOENT) { *ret_state = "missing"; *ret_color = ansi_grey(); *ret_size = UINT64_MAX; return; } r = -errno; } else r = access_fd(fd, R_OK); if (ERRNO_IS_PRIVILEGE(r)) { *ret_state = "inaccessible"; *ret_color = ansi_highlight_yellow(); *ret_size = UINT64_MAX; return; } if (r < 0) goto error; if (fstat(fd, &st) < 0) goto error; if (!S_ISREG(st.st_mode)) goto error; *ret_state = "present"; *ret_color = NULL; *ret_size = st.st_size; return; error: *ret_state = "error"; *ret_color = ansi_highlight_red(); *ret_size = UINT64_MAX; } static int print_list(FILE* file, sd_journal *j, Table *t) { _cleanup_free_ char *mid = NULL, *pid = NULL, *uid = NULL, *gid = NULL, *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL, *filename = NULL, *truncated = NULL, *coredump = NULL; const void *d; size_t l; usec_t ts; int r, signal_as_int = 0; const char *present = NULL, *color = NULL; uint64_t size = UINT64_MAX; bool normal_coredump; uid_t uid_as_int = UID_INVALID; gid_t gid_as_int = GID_INVALID; pid_t pid_as_int = 0; assert(file); assert(j); assert(t); SD_JOURNAL_FOREACH_DATA(j, d, l) { RETRIEVE(d, l, "MESSAGE_ID", mid); 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_TRUNCATED", truncated); RETRIEVE(d, l, "COREDUMP", coredump); } if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "Empty coredump log entry"); (void) parse_uid(uid, &uid_as_int); (void) parse_gid(gid, &gid_as_int); (void) parse_pid(pid, &pid_as_int); signal_as_int = signal_from_string(sgnl); r = sd_journal_get_realtime_usec(j, &ts); if (r < 0) return log_error_errno(r, "Failed to get realtime timestamp: %m"); normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR); if (filename) analyze_coredump_file(filename, &present, &color, &size); else if (coredump) present = "journal"; else if (normal_coredump) { present = "none"; color = ansi_grey(); } else present = NULL; if (STRPTR_IN_SET(present, "present", "journal") && truncated && parse_boolean(truncated) > 0) present = "truncated"; r = table_add_many( t, TABLE_TIMESTAMP, ts, TABLE_PID, pid_as_int, TABLE_UID, uid_as_int, TABLE_GID, gid_as_int, TABLE_SIGNAL, normal_coredump ? signal_as_int : 0, TABLE_STRING, present, TABLE_SET_COLOR, color, TABLE_STRING, exe ?: comm ?: cmdline, TABLE_SIZE, size); if (r < 0) return table_log_add_error(r); return 0; } static int print_info(FILE *file, sd_journal *j, bool need_space) { _cleanup_free_ char *mid = NULL, *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, *truncated = NULL, *coredump = NULL, *pkgmeta_name = NULL, *pkgmeta_version = NULL, *pkgmeta_json = NULL; const void *d; size_t l; bool normal_coredump; int r; assert(file); assert(j); (void) sd_journal_set_data_threshold(j, 0); SD_JOURNAL_FOREACH_DATA(j, d, l) { RETRIEVE(d, l, "MESSAGE_ID", mid); 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_HOSTNAME", hostname); 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_TRUNCATED", truncated); RETRIEVE(d, l, "COREDUMP", coredump); RETRIEVE(d, l, "COREDUMP_PACKAGE_NAME", pkgmeta_name); RETRIEVE(d, l, "COREDUMP_PACKAGE_VERSION", pkgmeta_version); RETRIEVE(d, l, "COREDUMP_PACKAGE_JSON", pkgmeta_json); RETRIEVE(d, l, "_BOOT_ID", boot_id); RETRIEVE(d, l, "_MACHINE_ID", machine_id); RETRIEVE(d, l, "MESSAGE", message); } if (need_space) fputs("\n", file); normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR); 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; const char *name = normal_coredump ? "Signal" : "Reason"; if (normal_coredump && safe_atoi(sgnl, &sig) >= 0) fprintf(file, " %s: %s (%s)\n", name, sgnl, signal_to_string(sig)); else fprintf(file, " %s: %s\n", name, sgnl); } if (timestamp) { usec_t u; r = safe_atou64(timestamp, &u); if (r >= 0) fprintf(file, " Timestamp: %s (%s)\n", FORMAT_TIMESTAMP(u), FORMAT_TIMESTAMP_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) { const char *state = NULL, *color = NULL; uint64_t size = UINT64_MAX; analyze_coredump_file(filename, &state, &color, &size); if (STRPTR_IN_SET(state, "present", "journal") && truncated && parse_boolean(truncated) > 0) state = "truncated"; fprintf(file, " Storage: %s%s (%s)%s\n", strempty(color), filename, state, ansi_normal()); if (size != UINT64_MAX) fprintf(file, " Disk Size: %s\n", FORMAT_BYTES(size)); } else if (coredump) fprintf(file, " Storage: journal\n"); else fprintf(file, " Storage: none\n"); if (pkgmeta_name && pkgmeta_version) fprintf(file, " Package: %s/%s\n", pkgmeta_name, pkgmeta_version); /* Print out the build-id of the 'main' ELF module, by matching the JSON key * with the 'exe' field. */ if (exe && pkgmeta_json) { _cleanup_(json_variant_unrefp) JsonVariant *v = NULL; r = json_parse(pkgmeta_json, 0, &v, NULL, NULL); if (r < 0) log_warning_errno(r, "json_parse on %s failed, ignoring: %m", pkgmeta_json); else { const char *module_name; JsonVariant *module_json; JSON_VARIANT_OBJECT_FOREACH(module_name, module_json, v) { JsonVariant *build_id; /* We only print the build-id for the 'main' ELF module */ if (!path_equal_filename(module_name, exe)) continue; build_id = json_variant_by_key(module_json, "buildId"); if (build_id) fprintf(file, " build-id: %s\n", json_variant_string(build_id)); break; } } } 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) return log_error_errno(SYNTHETIC_ERRNO(ESRCH), "No match found."); return r; } static int print_entry( sd_journal *j, size_t n_found, Table *t) { assert(j); if (t) return print_list(stdout, j, t); else if (arg_field) return print_field(stdout, j); else return print_info(stdout, j, n_found > 0); } static int dump_list(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; _cleanup_(table_unrefp) Table *t = NULL; size_t n_found = 0; bool verb_is_info; int r; verb_is_info = argc >= 1 && streq(argv[0], "info"); r = acquire_journal(&j, argv + 1); if (r < 0) return r; /* The coredumps are likely compressed, and for just listing them we don't need to decompress them, * so let's pick a fairly low data threshold here */ (void) sd_journal_set_data_threshold(j, 4096); if (!verb_is_info && !arg_field) { t = table_new("time", "pid", "uid", "gid", "sig", "corefile", "exe", "size"); if (!t) return log_oom(); (void) table_set_align_percent(t, TABLE_HEADER_CELL(1), 100); (void) table_set_align_percent(t, TABLE_HEADER_CELL(2), 100); (void) table_set_align_percent(t, TABLE_HEADER_CELL(3), 100); (void) table_set_align_percent(t, TABLE_HEADER_CELL(7), 100); (void) table_set_empty_string(t, "-"); } else pager_open(arg_pager_flags); /* "info" without pattern implies "-1" */ if ((arg_rows_max == 1 && arg_reverse) || (verb_is_info && argc == 1)) { r = focus(j); if (r < 0) return r; r = print_entry(j, 0, t); if (r < 0) return r; } else { if (arg_since != USEC_INFINITY && !arg_reverse) r = sd_journal_seek_realtime_usec(j, arg_since); else if (arg_until != USEC_INFINITY && arg_reverse) r = sd_journal_seek_realtime_usec(j, arg_until); else if (arg_reverse) r = sd_journal_seek_tail(j); else r = sd_journal_seek_head(j); if (r < 0) return log_error_errno(r, "Failed to seek to date: %m"); for (;;) { if (!arg_reverse) r = sd_journal_next(j); else r = sd_journal_previous(j); if (r < 0) return log_error_errno(r, "Failed to iterate through journal: %m"); if (r == 0) break; if (arg_until != USEC_INFINITY && !arg_reverse) { usec_t usec; r = sd_journal_get_realtime_usec(j, &usec); if (r < 0) return log_error_errno(r, "Failed to determine timestamp: %m"); if (usec > arg_until) continue; } if (arg_since != USEC_INFINITY && arg_reverse) { usec_t usec; r = sd_journal_get_realtime_usec(j, &usec); if (r < 0) return log_error_errno(r, "Failed to determine timestamp: %m"); if (usec < arg_since) continue; } r = print_entry(j, n_found++, t); if (r < 0) return r; if (arg_rows_max != SIZE_MAX && n_found >= arg_rows_max) break; } if (!arg_field && n_found <= 0) { if (!arg_quiet) log_notice("No coredumps found."); return -ESRCH; } } if (t) { r = table_print_with_pager(t, arg_json_format_flags, arg_pager_flags, arg_legend); if (r < 0) return r; } 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) { r = retrieve(data, len, "COREDUMP_FILENAME", &filename); if (r < 0) return r; assert(r > 0); if (access(filename, R_OK) < 0) return log_error_errno(errno, "File \"%s\" is not readable: %m", filename); if (path && !ENDSWITH_SET(filename, ".xz", ".lz4", ".zst")) { *path = TAKE_PTR(filename); return 0; } } 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 (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 = path_join(vt, "coredump-XXXXXX"); 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 likelihood 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(SYNTHETIC_ERRNO(ENOTTY), "Refusing to dump core to tty" " (use shell redirection or specify --output)."); file = stdout; } fd = fileno(file); } if (filename) { #if HAVE_COMPRESSION _cleanup_close_ int fdf = -1; 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 r = log_error_errno(SYNTHETIC_ERRNO(EOPNOTSUPP), "Cannot decompress file. Compiled without compression support."); 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) { (void) unlink(temp); log_debug("Removed temporary file %s", temp); } return r; } static int dump_core(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; _cleanup_fclose_ FILE *f = NULL; int r; if (arg_field) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --field/-F only makes sense with list"); r = acquire_journal(&j, argv + 1); if (r < 0) return r; r = focus(j); if (r < 0) return r; if (arg_output) { f = fopen(arg_output, "we"); if (!f) return log_error_errno(errno, "Failed to open \"%s\" for writing: %m", arg_output); } print_info(f ? stdout : stderr, j, false); r = save_core(j, f, NULL, NULL); if (r < 0) return r; r = sd_journal_previous(j); if (r > 0 && !arg_quiet) log_notice("More than one entry matches, ignoring rest."); return 0; } static int run_debug(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; _cleanup_free_ char *exe = NULL, *path = NULL; _cleanup_strv_free_ char **debugger_call = NULL; bool unlink_path = false; const char *data, *fork_name; size_t len; pid_t pid; int r; if (!arg_debugger) { char *env_debugger; env_debugger = getenv("SYSTEMD_DEBUGGER"); if (env_debugger) arg_debugger = env_debugger; else arg_debugger = "gdb"; } r = strv_extend(&debugger_call, arg_debugger); if (r < 0) return log_oom(); r = strv_extend_strv(&debugger_call, arg_debugger_args, false); if (r < 0) return log_oom(); if (arg_field) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Option --field/-F only makes sense with list"); r = acquire_journal(&j, argv + 1); if (r < 0) return r; r = focus(j); if (r < 0) return r; if (!arg_quiet) { 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)")) return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "Binary already deleted."); if (!path_is_absolute(exe)) return log_error_errno(SYNTHETIC_ERRNO(ENOENT), "Binary is not an absolute path."); r = save_core(j, NULL, &path, &unlink_path); if (r < 0) return r; r = strv_extend_strv(&debugger_call, STRV_MAKE(exe, "-c", path), false); if (r < 0) return log_oom(); /* Don't interfere with gdb and its handling of SIGINT. */ (void) ignore_signals(SIGINT); fork_name = strjoina("(", debugger_call[0], ")"); r = safe_fork(fork_name, FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG|FORK_FLUSH_STDIO, &pid); if (r < 0) goto finish; if (r == 0) { execvp(debugger_call[0], debugger_call); log_open(); log_error_errno(errno, "Failed to invoke %s: %m", debugger_call[0]); _exit(EXIT_FAILURE); } r = wait_for_terminate_and_check(debugger_call[0], pid, WAIT_LOG_ABNORMAL); finish: (void) default_signals(SIGINT); if (unlink_path) { log_debug("Removed temporary file %s", path); (void) unlink(path); } return r; } static int check_units_active(void) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int c = 0, r; const char *id, *state, *substate; if (arg_quiet) return false; r = sd_bus_default_system(&bus); if (r == -ENOENT) { log_debug("D-Bus is not running, skipping active unit check"); return 0; } if (r < 0) return log_error_errno(r, "Failed to acquire bus: %m"); r = sd_bus_message_new_method_call( bus, &m, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "ListUnitsByPatterns"); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_append_strv(m, NULL); if (r < 0) return bus_log_create_error(r); r = sd_bus_message_append_strv(m, STRV_MAKE("systemd-coredump@*.service")); if (r < 0) return bus_log_create_error(r); r = sd_bus_call(bus, m, SHORT_BUS_CALL_TIMEOUT_USEC, &error, &reply); if (r < 0) return log_error_errno(r, "Failed to check if any systemd-coredump@.service units are running: %s", bus_error_message(&error, r)); r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssssouso)"); if (r < 0) return bus_log_parse_error(r); while ((r = sd_bus_message_read( reply, "(ssssssouso)", &id, NULL, NULL, &state, &substate, NULL, NULL, NULL, NULL, NULL)) > 0) { bool found = !STR_IN_SET(state, "inactive", "dead", "failed"); log_debug("Unit %s is %s/%s, %scounting it.", id, state, substate, found ? "" : "not "); c += found; } if (r < 0) return bus_log_parse_error(r); r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); return c; } static int coredumpctl_main(int argc, char *argv[]) { static const Verb verbs[] = { { "list", VERB_ANY, VERB_ANY, VERB_DEFAULT, dump_list }, { "info", VERB_ANY, VERB_ANY, 0, dump_list }, { "dump", VERB_ANY, VERB_ANY, 0, dump_core }, { "debug", VERB_ANY, VERB_ANY, 0, run_debug }, { "gdb", VERB_ANY, VERB_ANY, 0, run_debug }, { "help", VERB_ANY, 1, 0, verb_help }, {} }; return dispatch_verb(argc, argv, verbs, NULL); } static int run(int argc, char *argv[]) { int r, units_active; setlocale(LC_ALL, ""); log_setup(); /* The journal merging logic potentially needs a lot of fds. */ (void) rlimit_nofile_bump(HIGH_RLIMIT_NOFILE); r = parse_argv(argc, argv); if (r <= 0) return r; sigbus_install(); units_active = check_units_active(); /* error is treated the same as 0 */ r = coredumpctl_main(argc, argv); if (units_active > 0) printf("%s-- Notice: %d systemd-coredump@.service %s, output may be incomplete.%s\n", ansi_highlight_red(), units_active, units_active == 1 ? "unit is running" : "units are running", ansi_normal()); return r; } DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);