/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2012 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <fcntl.h>
#include <getopt.h>
#include "bus-error.h"
#include "bus-util.h"
#include "fd-util.h"
+#include "format-table.h"
#include "format-util.h"
+#include "main-func.h"
+#include "pager.h"
+#include "pretty-print.h"
#include "process-util.h"
#include "signal-util.h"
#include "strv.h"
static const char* arg_who = NULL;
static const char* arg_why = "Unknown reason";
static const char* arg_mode = NULL;
+static PagerFlags arg_pager_flags = 0;
+static bool arg_legend = true;
static enum {
ACTION_INHIBIT,
return r;
}
-static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
+static int print_inhibitors(sd_bus *bus) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
- const char *what, *who, *why, *mode;
- unsigned int uid, pid;
- unsigned n = 0;
+ _cleanup_(table_unrefp) Table *table = NULL;
int r;
+ (void) pager_open(arg_pager_flags);
+
r = sd_bus_call_method(
bus,
"org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"ListInhibitors",
- error,
+ &error,
&reply,
"");
if (r < 0)
- return r;
+ return log_error_errno(r, "Could not get active inhibitors: %s", bus_error_message(&error, r));
+
+ table = table_new("WHO", "UID", "USER", "PID", "COMM", "WHAT", "WHY", "MODE");
+ if (!table)
+ return log_oom();
+
+ /* If there's not enough space, shorten the "WHY" column, as it's little more than an explaining comment. */
+ (void) table_set_weight(table, TABLE_HEADER_CELL(6), 20);
r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
if (r < 0)
return bus_log_parse_error(r);
- while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
+ for (;;) {
_cleanup_free_ char *comm = NULL, *u = NULL;
+ const char *what, *who, *why, *mode;
+ uint32_t uid, pid;
+
+ r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid);
+ if (r < 0)
+ return bus_log_parse_error(r);
+ if (r == 0)
+ break;
if (arg_mode && !streq(mode, arg_mode))
continue;
- get_process_comm(pid, &comm);
+ (void) get_process_comm(pid, &comm);
u = uid_to_name(uid);
- printf(" Who: %s (UID "UID_FMT"/%s, PID "PID_FMT"/%s)\n"
- " What: %s\n"
- " Why: %s\n"
- " Mode: %s\n\n",
- who, uid, strna(u), pid, strna(comm),
- what,
- why,
- mode);
-
- n++;
+ r = table_add_many(table,
+ TABLE_STRING, who,
+ TABLE_UINT32, uid,
+ TABLE_STRING, strna(u),
+ TABLE_UINT32, pid,
+ TABLE_STRING, strna(comm),
+ TABLE_STRING, what,
+ TABLE_STRING, why,
+ TABLE_STRING, mode);
+ if (r < 0)
+ return log_error_errno(r, "Failed to add table row: %m");
}
- 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);
- printf("%u inhibitors listed.\n", n);
+ if (table_get_rows(table) > 1) {
+ r = table_set_sort(table, (size_t) 1, (size_t) 0, (size_t) 5, (size_t) 6, (size_t) -1);
+ if (r < 0)
+ return log_error_errno(r, "Failed to sort table: %m");
+
+ table_set_header(table, arg_legend);
+
+ r = table_print(table, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Failed to show table: %m");
+ }
+
+ if (arg_legend) {
+ if (table_get_rows(table) > 1)
+ printf("\n%zu inhibitors listed.\n", table_get_rows(table) - 1);
+ else
+ printf("No inhibitors.\n");
+ }
+
return 0;
}
-static void help(void) {
+static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-inhibit", "1", &link);
+ if (r < 0)
+ return log_oom();
+
printf("%s [OPTIONS...] {COMMAND} ...\n\n"
"Execute a process while inhibiting shutdown/sleep/idle.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-legend Do not show the headers and footers\n"
" --what=WHAT Operations to inhibit, colon separated list of:\n"
" shutdown, sleep, idle, handle-power-key,\n"
" handle-suspend-key, handle-hibernate-key,\n"
" --why=STRING A descriptive string why is being inhibited\n"
" --mode=MODE One of block or delay\n"
" --list List active inhibitors\n"
- , program_invocation_short_name);
+ "\nSee the %s for details.\n"
+ , program_invocation_short_name
+ , link
+ );
+
+ return 0;
}
static int parse_argv(int argc, char *argv[]) {
ARG_WHY,
ARG_MODE,
ARG_LIST,
+ ARG_NO_PAGER,
+ ARG_NO_LEGEND,
};
static const struct option options[] = {
{ "why", required_argument, NULL, ARG_WHY },
{ "mode", required_argument, NULL, ARG_MODE },
{ "list", no_argument, NULL, ARG_LIST },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "no-legend", no_argument, NULL, ARG_NO_LEGEND },
{}
};
switch (c) {
case 'h':
- help();
- return 0;
+ return help();
case ARG_VERSION:
return version();
arg_action = ACTION_LIST;
break;
+ case ARG_NO_PAGER:
+ arg_pager_flags |= PAGER_DISABLE;
+ break;
+
+ case ARG_NO_LEGEND:
+ arg_legend = false;
+ break;
+
case '?':
return -EINVAL;
if (arg_action == ACTION_INHIBIT && optind == argc)
arg_action = ACTION_LIST;
- else if (arg_action == ACTION_INHIBIT && optind >= argc) {
- log_error("Missing command line to execute.");
- return -EINVAL;
- }
+ else if (arg_action == ACTION_INHIBIT && optind >= argc)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Missing command line to execute.");
return 1;
}
-int main(int argc, char *argv[]) {
- _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+static int run(int argc, char *argv[]) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
log_open();
r = parse_argv(argc, argv);
- if (r < 0)
- return EXIT_FAILURE;
- if (r == 0)
- return EXIT_SUCCESS;
+ if (r <= 0)
+ return r;
r = sd_bus_default_system(&bus);
- if (r < 0) {
- log_error_errno(r, "Failed to connect to bus: %m");
- return EXIT_FAILURE;
- }
-
- if (arg_action == ACTION_LIST) {
+ if (r < 0)
+ return log_error_errno(r, "Failed to connect to bus: %m");
- r = print_inhibitors(bus, &error);
- if (r < 0) {
- log_error("Failed to list inhibitors: %s", bus_error_message(&error, -r));
- return EXIT_FAILURE;
- }
+ if (arg_action == ACTION_LIST)
+ return print_inhibitors(bus);
- } else {
+ else {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_close_ int fd = -1;
_cleanup_free_ char *w = NULL;
pid_t pid;
+ /* Ignore SIGINT and allow the forked process to receive it */
+ (void) ignore_signals(SIGINT, -1);
+
if (!arg_who)
arg_who = w = strv_join(argv + optind, " ");
arg_mode = "block";
fd = inhibit(bus, &error);
- if (fd < 0) {
- log_error("Failed to inhibit: %s", bus_error_message(&error, fd));
- return EXIT_FAILURE;
- }
+ if (fd < 0)
+ return log_error_errno(fd, "Failed to inhibit: %s", bus_error_message(&error, fd));
r = safe_fork("(inhibit)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_LOG, &pid);
if (r < 0)
- return EXIT_FAILURE;
+ return r;
if (r == 0) {
/* Child */
execvp(argv[optind], argv + optind);
_exit(EXIT_FAILURE);
}
- r = wait_for_terminate_and_check(argv[optind], pid, WAIT_LOG);
- return r < 0 ? EXIT_FAILURE : r;
+ return wait_for_terminate_and_check(argv[optind], pid, WAIT_LOG);
}
-
- return 0;
}
+
+DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
projects / thirdparty / systemd.git / blobdiff