/* 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-util.h" #include "pager.h" #include "process-util.h" #include "signal-util.h" #include "strv.h" #include "user-util.h" #include "util.h" /// Additional includes needed by elogind #include "musl_missing.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 bool arg_no_pager = false; 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, sd_bus_error *error) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; const char *what, *who, *why, *mode; unsigned int uid, pid; unsigned n = 0; int r; (void) pager_open(arg_no_pager, false); r = sd_bus_call_method( bus, "org.freedesktop.login1", "/org/freedesktop/login1", "org.freedesktop.login1.Manager", "ListInhibitors", error, &reply, ""); if (r < 0) return r; 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) { _cleanup_free_ char *comm = NULL, *u = NULL; if (arg_mode && !streq(mode, arg_mode)) continue; 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++; } 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); return 0; } static void help(void) { 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" " --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" , program_invocation_short_name); } 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, }; 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 }, {} }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0) switch (c) { case 'h': help(); return 0; 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_no_pager = true; 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) { log_error("Missing command line to execute."); return -EINVAL; } return 1; } int main(int argc, char *argv[]) { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; int r; elogind_set_program_name(argv[0]); log_parse_environment(); log_open(); r = parse_argv(argc, argv); if (r < 0) return EXIT_FAILURE; if (r == 0) return EXIT_SUCCESS; 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) { r = print_inhibitors(bus, &error); pager_close(); if (r < 0) { log_error("Failed to list inhibitors: %s", bus_error_message(&error, -r)); return EXIT_FAILURE; } } else { _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, " "); if (!arg_mode) arg_mode = "block"; fd = inhibit(bus, &error); if (fd < 0) { log_error("Failed to inhibit: %s", bus_error_message(&error, fd)); return EXIT_FAILURE; } r = safe_fork("(inhibit)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_CLOSE_ALL_FDS|FORK_LOG, &pid); if (r < 0) return EXIT_FAILURE; if (r == 0) { /* Child */ execvp(argv[optind], argv + optind); log_open(); log_error_errno(errno, "Failed to execute %s: %m", argv[optind]); _exit(EXIT_FAILURE); } r = wait_for_terminate_and_check(argv[optind], pid, WAIT_LOG); return r < 0 ? EXIT_FAILURE : r; } return EXIT_SUCCESS; }