/* SPDX-License-Identifier: LGPL-2.1+ */ /*** This file is part of systemd. Copyright 2012 Zbigniew Jędrzejewski-Szmek ***/ #include #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 "fd-util.h" #include "fileio.h" #include "fs-util.h" #include "journal-internal.h" #include "journal-util.h" #include "log.h" #include "macro.h" #include "pager.h" #include "parse-util.h" #include "path-util.h" #include "process-util.h" #include "sigbus.h" #include "signal-util.h" #include "string-util.h" #include "strv.h" #include "terminal-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_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 bool arg_reverse = false; static bool arg_quiet = false; 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 { r = sd_journal_open(&j, 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; filter = journal_make_match_string(j); log_debug("Journal filter: %s", filter); } *ret = TAKE_PTR(j); return 0; } static int 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" " -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" " -D --directory=DIR Use journal files from directory\n\n" " -q --quiet Do not show info messages and privilege warning\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); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_NO_PAGER, ARG_NO_LEGEND, }; 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 }, { "output", required_argument, NULL, 'o' }, { "field", required_argument, NULL, 'F' }, { "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' }, {} }; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "ho:F:1D:rS:U:q", options, NULL)) >= 0) switch(c) { case 'h': return help(); case ARG_VERSION: 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 'S': r = parse_timestamp(optarg, &arg_since); if (r < 0) return log_error_errno(r, "Failed to parse timestamp: %s", optarg); break; case 'U': r = parse_timestamp(optarg, &arg_until); if (r < 0) return log_error_errno(r, "Failed to parse timestamp: %s", 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 'r': arg_reverse = true; break; case 'q': arg_quiet = true; break; case '?': return -EINVAL; default: assert_not_reached("Unhandled option"); } if (arg_since != USEC_INFINITY && arg_until != USEC_INFINITY && arg_since > arg_until) { log_error("--since= must be before --until=."); return -EINVAL; } 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(*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 *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 t; char buf[FORMAT_TIMESTAMP_MAX]; int r; const char *present; bool normal_coredump; assert(file); assert(j); 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) { 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", 9, "COREFILE", "EXE"); normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR); 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 if (normal_coredump) present = "none"; else present = "-"; if (STR_IN_SET(present, "present", "journal") && truncated && parse_boolean(truncated) > 0) present = "truncated"; fprintf(file, "%-*s %*s %*s %*s %*s %-*s %s\n", FORMAT_TIMESTAMP_WIDTH, buf, 6, strna(pid), 5, strna(uid), 5, strna(gid), 3, normal_coredump ? strna(sgnl) : "-", 9, present, strna(exe ?: (comm ?: cmdline))); 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; const void *d; size_t l; bool normal_coredump; int r; assert(file); assert(j); 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_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, "_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); 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) { 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) { bool inacc, trunc; inacc = access(filename, R_OK) < 0; trunc = truncated && parse_boolean(truncated) > 0; if (inacc || trunc) fprintf(file, " Storage: %s%s (%s%s%s)%s\n", ansi_highlight_red(), filename, inacc ? "inaccessible" : "", inacc && trunc ? ", " : "", trunc ? "truncated" : "", ansi_normal()); else fprintf(file, " Storage: %s\n", filename); } 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, bool verb_is_info) { assert(j); if (verb_is_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(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; unsigned 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; (void) pager_open(arg_no_pager, false); /* 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, verb_is_info); } 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++, verb_is_info); if (r < 0) return r; } if (!arg_field && n_found <= 0) { if (!arg_quiet) 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 = TAKE_PTR(filename); 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"); 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 HAVE_XZ || 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(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; int r; if (arg_field) { log_error("Option --field/-F only makes sense with list"); return -EINVAL; } r = acquire_journal(&j, argv + 1); if (r < 0) return r; 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 && !arg_quiet) log_notice("More than one entry matches, ignoring rest."); return 0; } static int run_gdb(int argc, char **argv, void *userdata) { _cleanup_(sd_journal_closep) sd_journal *j = NULL; _cleanup_free_ char *exe = NULL, *path = NULL; bool unlink_path = false; const char *data; size_t len; pid_t pid; int r; if (arg_field) { log_error("Option --field/-F only makes sense with list"); return -EINVAL; } r = acquire_journal(&j, argv + 1); if (r < 0) return r; 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; /* Don't interfere with gdb and its handling of SIGINT. */ (void) ignore_signals(SIGINT, -1); r = safe_fork("(gdb)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_LOG, &pid); if (r < 0) goto finish; if (r == 0) { execlp("gdb", "gdb", exe, path, NULL); log_open(); log_error_errno(errno, "Failed to invoke gdb: %m"); _exit(EXIT_FAILURE); } r = wait_for_terminate_and_check("gdb", pid, WAIT_LOG_ABNORMAL); finish: (void) default_signals(SIGINT, -1); if (unlink_path) { log_debug("Removed temporary file %s", path); unlink(path); } return r; } static int check_units_active(void) { _cleanup_(sd_bus_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 < 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 }, { "gdb", VERB_ANY, VERB_ANY, 0, run_gdb }, {} }; return dispatch_verb(argc, argv, verbs, NULL); } int main(int argc, char *argv[]) { int r, units_active; setlocale(LC_ALL, ""); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) goto end; 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()); end: pager_close(); safe_fclose(arg_output); return r >= 0 ? r : EXIT_FAILURE; }