1080 lines
36 KiB
C
1080 lines
36 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2012 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <fcntl.h>
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#include <getopt.h>
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#include <locale.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "sd-bus.h"
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#include "sd-journal.h"
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#include "sd-messages.h"
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#include "alloc-util.h"
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#include "bus-error.h"
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#include "bus-util.h"
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#include "compress.h"
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#include "fd-util.h"
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#include "fileio.h"
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#include "fs-util.h"
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#include "journal-internal.h"
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#include "journal-util.h"
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#include "log.h"
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#include "macro.h"
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#include "pager.h"
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#include "parse-util.h"
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#include "path-util.h"
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#include "process-util.h"
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#include "sigbus.h"
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#include "signal-util.h"
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#include "string-util.h"
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#include "strv.h"
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#include "terminal-util.h"
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#include "user-util.h"
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#include "util.h"
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#include "verbs.h"
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#define SHORT_BUS_CALL_TIMEOUT_USEC (3 * USEC_PER_SEC)
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static usec_t arg_since = USEC_INFINITY, arg_until = USEC_INFINITY;
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static const char* arg_field = NULL;
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static const char *arg_directory = NULL;
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static bool arg_no_pager = false;
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static int arg_no_legend = false;
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static int arg_one = false;
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static FILE* arg_output = NULL;
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static bool arg_reverse = false;
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static bool arg_quiet = false;
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static int add_match(sd_journal *j, const char *match) {
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_cleanup_free_ char *p = NULL;
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const char* prefix, *pattern;
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pid_t pid;
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int r;
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if (strchr(match, '='))
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prefix = "";
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else if (strchr(match, '/')) {
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r = path_make_absolute_cwd(match, &p);
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if (r < 0)
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return log_error_errno(r, "path_make_absolute_cwd(\"%s\"): %m", match);
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match = p;
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prefix = "COREDUMP_EXE=";
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} else if (parse_pid(match, &pid) >= 0)
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prefix = "COREDUMP_PID=";
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else
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prefix = "COREDUMP_COMM=";
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pattern = strjoina(prefix, match);
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log_debug("Adding match: %s", pattern);
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r = sd_journal_add_match(j, pattern, 0);
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if (r < 0)
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return log_error_errno(r, "Failed to add match \"%s\": %m", match);
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return 0;
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}
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static int add_matches(sd_journal *j, char **matches) {
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char **match;
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int r;
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r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR, 0);
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if (r < 0)
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return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR);
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r = sd_journal_add_match(j, "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR, 0);
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if (r < 0)
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return log_error_errno(r, "Failed to add match \"%s\": %m", "MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR);
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STRV_FOREACH(match, matches) {
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r = add_match(j, *match);
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if (r < 0)
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return r;
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}
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return 0;
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}
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static int acquire_journal(sd_journal **ret, char **matches) {
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_cleanup_(sd_journal_closep) sd_journal *j = NULL;
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int r;
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assert(ret);
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if (arg_directory) {
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r = sd_journal_open_directory(&j, arg_directory, 0);
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if (r < 0)
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return log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory);
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} else {
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r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
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if (r < 0)
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return log_error_errno(r, "Failed to open journal: %m");
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}
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r = journal_access_check_and_warn(j, arg_quiet, true);
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if (r < 0)
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return r;
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r = add_matches(j, matches);
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if (r < 0)
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return r;
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if (DEBUG_LOGGING) {
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_cleanup_free_ char *filter;
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filter = journal_make_match_string(j);
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log_debug("Journal filter: %s", filter);
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}
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*ret = j;
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j = NULL;
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return 0;
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}
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static int help(void) {
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printf("%s [OPTIONS...]\n\n"
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"List or retrieve coredumps from the journal.\n\n"
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"Flags:\n"
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" -h --help Show this help\n"
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" --version Print version string\n"
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" --no-pager Do not pipe output into a pager\n"
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" --no-legend Do not print the column headers.\n"
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" -1 Show information about most recent entry only\n"
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" -S --since=DATE Only print coredumps since the date\n"
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" -U --until=DATE Only print coredumps until the date\n"
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" -r --reverse Show the newest entries first\n"
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" -F --field=FIELD List all values a certain field takes\n"
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" -o --output=FILE Write output to FILE\n"
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" -D --directory=DIR Use journal files from directory\n\n"
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" -q --quiet Do not show info messages and privilege warning\n"
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"Commands:\n"
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" list [MATCHES...] List available coredumps (default)\n"
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" info [MATCHES...] Show detailed information about one or more coredumps\n"
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" dump [MATCHES...] Print first matching coredump to stdout\n"
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" gdb [MATCHES...] Start gdb for the first matching coredump\n"
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, program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_VERSION = 0x100,
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ARG_NO_PAGER,
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ARG_NO_LEGEND,
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};
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int c, r;
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version" , no_argument, NULL, ARG_VERSION },
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{ "no-pager", no_argument, NULL, ARG_NO_PAGER },
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{ "no-legend", no_argument, NULL, ARG_NO_LEGEND },
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{ "output", required_argument, NULL, 'o' },
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{ "field", required_argument, NULL, 'F' },
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{ "directory", required_argument, NULL, 'D' },
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{ "reverse", no_argument, NULL, 'r' },
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{ "since", required_argument, NULL, 'S' },
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{ "until", required_argument, NULL, 'U' },
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{ "quiet", no_argument, NULL, 'q' },
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{}
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};
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "ho:F:1D:rS:U:q", options, NULL)) >= 0)
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switch(c) {
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case 'h':
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return help();
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case ARG_VERSION:
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return version();
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case ARG_NO_PAGER:
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arg_no_pager = true;
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break;
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case ARG_NO_LEGEND:
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arg_no_legend = true;
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break;
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case 'o':
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if (arg_output) {
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log_error("cannot set output more than once");
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return -EINVAL;
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}
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arg_output = fopen(optarg, "we");
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if (!arg_output)
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return log_error_errno(errno, "writing to '%s': %m", optarg);
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break;
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case 'S':
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r = parse_timestamp(optarg, &arg_since);
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if (r < 0)
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return log_error_errno(r, "Failed to parse timestamp: %s", optarg);
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break;
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case 'U':
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r = parse_timestamp(optarg, &arg_until);
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if (r < 0)
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return log_error_errno(r, "Failed to parse timestamp: %s", optarg);
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break;
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case 'F':
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if (arg_field) {
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log_error("cannot use --field/-F more than once");
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return -EINVAL;
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}
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arg_field = optarg;
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break;
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case '1':
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arg_one = true;
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break;
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case 'D':
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arg_directory = optarg;
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break;
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case 'r':
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arg_reverse = true;
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break;
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case 'q':
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arg_quiet = true;
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break;
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case '?':
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return -EINVAL;
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default:
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assert_not_reached("Unhandled option");
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}
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if (arg_since != USEC_INFINITY && arg_until != USEC_INFINITY &&
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arg_since > arg_until) {
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log_error("--since= must be before --until=.");
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return -EINVAL;
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}
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return 1;
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}
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static int retrieve(const void *data,
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size_t len,
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const char *name,
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char **var) {
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size_t ident;
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char *v;
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ident = strlen(name) + 1; /* name + "=" */
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if (len < ident)
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return 0;
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if (memcmp(data, name, ident - 1) != 0)
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return 0;
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if (((const char*) data)[ident - 1] != '=')
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return 0;
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v = strndup((const char*)data + ident, len - ident);
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if (!v)
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return log_oom();
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free(*var);
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*var = v;
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return 1;
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}
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static int print_field(FILE* file, sd_journal *j) {
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const void *d;
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size_t l;
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assert(file);
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assert(j);
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assert(arg_field);
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/* A (user-specified) field may appear more than once for a given entry.
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* We will print all of the occurences.
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* This is different below for fields that systemd-coredump uses,
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* because they cannot meaningfully appear more than once.
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*/
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SD_JOURNAL_FOREACH_DATA(j, d, l) {
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_cleanup_free_ char *value = NULL;
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int r;
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r = retrieve(d, l, arg_field, &value);
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if (r < 0)
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return r;
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if (r > 0)
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fprintf(file, "%s\n", value);
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}
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return 0;
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}
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#define RETRIEVE(d, l, name, arg) \
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{ \
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int _r = retrieve(d, l, name, &arg); \
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if (_r < 0) \
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return _r; \
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if (_r > 0) \
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continue; \
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}
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static int print_list(FILE* file, sd_journal *j, int had_legend) {
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_cleanup_free_ char
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*mid = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
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*sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
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*filename = NULL, *truncated = NULL, *coredump = NULL;
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const void *d;
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size_t l;
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usec_t t;
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char buf[FORMAT_TIMESTAMP_MAX];
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int r;
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const char *present;
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bool normal_coredump;
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assert(file);
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assert(j);
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SD_JOURNAL_FOREACH_DATA(j, d, l) {
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RETRIEVE(d, l, "MESSAGE_ID", mid);
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RETRIEVE(d, l, "COREDUMP_PID", pid);
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RETRIEVE(d, l, "COREDUMP_UID", uid);
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RETRIEVE(d, l, "COREDUMP_GID", gid);
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RETRIEVE(d, l, "COREDUMP_SIGNAL", sgnl);
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RETRIEVE(d, l, "COREDUMP_EXE", exe);
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RETRIEVE(d, l, "COREDUMP_COMM", comm);
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RETRIEVE(d, l, "COREDUMP_CMDLINE", cmdline);
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RETRIEVE(d, l, "COREDUMP_FILENAME", filename);
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RETRIEVE(d, l, "COREDUMP_TRUNCATED", truncated);
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RETRIEVE(d, l, "COREDUMP", coredump);
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}
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if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) {
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log_warning("Empty coredump log entry");
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return -EINVAL;
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}
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r = sd_journal_get_realtime_usec(j, &t);
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if (r < 0)
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return log_error_errno(r, "Failed to get realtime timestamp: %m");
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format_timestamp(buf, sizeof(buf), t);
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if (!had_legend && !arg_no_legend)
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fprintf(file, "%-*s %*s %*s %*s %*s %-*s %s\n",
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FORMAT_TIMESTAMP_WIDTH, "TIME",
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6, "PID",
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5, "UID",
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5, "GID",
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3, "SIG",
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9, "COREFILE",
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"EXE");
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normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR);
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if (filename)
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if (access(filename, R_OK) == 0)
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present = "present";
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else if (errno == ENOENT)
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present = "missing";
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else
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present = "error";
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else if (coredump)
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present = "journal";
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else if (normal_coredump)
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present = "none";
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else
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present = "-";
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if (STR_IN_SET(present, "present", "journal") && truncated && parse_boolean(truncated) > 0)
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present = "truncated";
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fprintf(file, "%-*s %*s %*s %*s %*s %-*s %s\n",
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FORMAT_TIMESTAMP_WIDTH, buf,
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6, strna(pid),
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5, strna(uid),
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5, strna(gid),
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3, normal_coredump ? strna(sgnl) : "-",
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9, present,
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strna(exe ?: (comm ?: cmdline)));
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return 0;
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}
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static int print_info(FILE *file, sd_journal *j, bool need_space) {
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_cleanup_free_ char
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*mid = NULL, *pid = NULL, *uid = NULL, *gid = NULL,
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*sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
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*unit = NULL, *user_unit = NULL, *session = NULL,
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*boot_id = NULL, *machine_id = NULL, *hostname = NULL,
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*slice = NULL, *cgroup = NULL, *owner_uid = NULL,
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*message = NULL, *timestamp = NULL, *filename = NULL,
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*truncated = NULL, *coredump = NULL;
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const void *d;
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size_t l;
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bool normal_coredump;
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int r;
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assert(file);
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assert(j);
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SD_JOURNAL_FOREACH_DATA(j, d, l) {
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RETRIEVE(d, l, "MESSAGE_ID", mid);
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RETRIEVE(d, l, "COREDUMP_PID", pid);
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RETRIEVE(d, l, "COREDUMP_UID", uid);
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RETRIEVE(d, l, "COREDUMP_GID", gid);
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RETRIEVE(d, l, "COREDUMP_SIGNAL", sgnl);
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RETRIEVE(d, l, "COREDUMP_EXE", exe);
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RETRIEVE(d, l, "COREDUMP_COMM", comm);
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RETRIEVE(d, l, "COREDUMP_CMDLINE", cmdline);
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RETRIEVE(d, l, "COREDUMP_UNIT", unit);
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RETRIEVE(d, l, "COREDUMP_USER_UNIT", user_unit);
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RETRIEVE(d, l, "COREDUMP_SESSION", session);
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RETRIEVE(d, l, "COREDUMP_OWNER_UID", owner_uid);
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RETRIEVE(d, l, "COREDUMP_SLICE", slice);
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RETRIEVE(d, l, "COREDUMP_CGROUP", cgroup);
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RETRIEVE(d, l, "COREDUMP_TIMESTAMP", timestamp);
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RETRIEVE(d, l, "COREDUMP_FILENAME", filename);
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RETRIEVE(d, l, "COREDUMP_TRUNCATED", truncated);
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RETRIEVE(d, l, "COREDUMP", coredump);
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RETRIEVE(d, l, "_BOOT_ID", boot_id);
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RETRIEVE(d, l, "_MACHINE_ID", machine_id);
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RETRIEVE(d, l, "_HOSTNAME", hostname);
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RETRIEVE(d, l, "MESSAGE", message);
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}
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if (need_space)
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fputs("\n", file);
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normal_coredump = streq_ptr(mid, SD_MESSAGE_COREDUMP_STR);
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if (comm)
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fprintf(file,
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" PID: %s%s%s (%s)\n",
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ansi_highlight(), strna(pid), ansi_normal(), comm);
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else
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fprintf(file,
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" PID: %s%s%s\n",
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ansi_highlight(), strna(pid), ansi_normal());
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if (uid) {
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uid_t n;
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if (parse_uid(uid, &n) >= 0) {
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_cleanup_free_ char *u = NULL;
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u = uid_to_name(n);
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fprintf(file,
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" UID: %s (%s)\n",
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uid, u);
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} else {
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fprintf(file,
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" UID: %s\n",
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uid);
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}
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}
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if (gid) {
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gid_t n;
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|
|
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();
|
|
|
|
if (arg_output)
|
|
fclose(arg_output);
|
|
|
|
return r >= 0 ? r : EXIT_FAILURE;
|
|
}
|