/* SPDX-License-Identifier: LGPL-2.1+ */ #include #include #include #include #include #include "sd-bus.h" #include "alloc-util.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" #include "user-util.h" #include "util.h" static const char* arg_what = "idle:sleep:shutdown"; 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, ACTION_LIST } arg_action = ACTION_INHIBIT; static int inhibit(sd_bus *bus, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; int r; int fd; r = sd_bus_call_method( bus, "org.freedesktop.login1", "/org/freedesktop/login1", "org.freedesktop.login1.Manager", "Inhibit", error, &reply, "ssss", arg_what, arg_who, arg_why, arg_mode); if (r < 0) return r; r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd); if (r < 0) return r; r = fcntl(fd, F_DUPFD_CLOEXEC, 3); if (r < 0) return -errno; return r; } 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; _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, &reply, ""); if (r < 0) 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); 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; (void) get_process_comm(pid, &comm); u = uid_to_name(uid); 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"); } r = sd_bus_message_exit_container(reply); if (r < 0) return bus_log_parse_error(r); 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 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" " handle-lid-switch\n" " --who=STRING A descriptive string who is inhibiting\n" " --why=STRING A descriptive string why is being inhibited\n" " --mode=MODE One of block or delay\n" " --list List active inhibitors\n" "\nSee the %s for details.\n" , program_invocation_short_name , link ); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_WHAT, ARG_WHO, ARG_WHY, ARG_MODE, ARG_LIST, ARG_NO_PAGER, ARG_NO_LEGEND, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "what", required_argument, NULL, ARG_WHAT }, { "who", required_argument, NULL, ARG_WHO }, { "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 }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) switch (c) { case 'h': return help(); case ARG_VERSION: return version(); case ARG_WHAT: arg_what = optarg; break; case ARG_WHO: arg_who = optarg; break; case ARG_WHY: arg_why = optarg; break; case ARG_MODE: arg_mode = optarg; break; case ARG_LIST: 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; default: assert_not_reached("Unhandled option"); } if (arg_action == ACTION_INHIBIT && optind == argc) arg_action = ACTION_LIST; else if (arg_action == ACTION_INHIBIT && optind >= argc) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Missing command line to execute."); return 1; } static int run(int argc, char *argv[]) { _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; int r; log_show_color(true); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r <= 0) return r; r = sd_bus_default_system(&bus); if (r < 0) return log_error_errno(r, "Failed to connect to bus: %m"); if (arg_action == ACTION_LIST) return print_inhibitors(bus); else { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_strv_free_ char **arguments = NULL; _cleanup_free_ char *w = NULL; _cleanup_close_ int fd = -1; 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, " "); if (!arg_mode) arg_mode = "block"; fd = inhibit(bus, &error); if (fd < 0) return log_error_errno(fd, "Failed to inhibit: %s", bus_error_message(&error, fd)); arguments = strv_copy(argv + optind); if (!arguments) return log_oom(); r = safe_fork("(inhibit)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid); if (r < 0) return r; if (r == 0) { /* Child */ execvp(arguments[0], arguments); log_open(); log_error_errno(errno, "Failed to execute %s: %m", argv[optind]); _exit(EXIT_FAILURE); } return wait_for_terminate_and_check(argv[optind], pid, WAIT_LOG); } } DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);