| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include "sd-bus.h" |
| |
| #include "alloc-util.h" |
| #include "build.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 "terminal-util.h" |
| #include "user-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; |
| |
| return RET_NERRNO(fcntl(fd, F_DUPFD_CLOEXEC, 3)); |
| } |
| |
| 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; |
| |
| 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); |
| (void) table_set_maximum_width(table, TABLE_HEADER_CELL(0), columns()/2); |
| |
| 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_UID, (uid_t) uid, |
| TABLE_STRING, strna(u), |
| TABLE_PID, (pid_t) pid, |
| TABLE_STRING, strna(comm), |
| TABLE_STRING, what, |
| TABLE_STRING, why, |
| TABLE_STRING, mode); |
| if (r < 0) |
| return table_log_add_error(r); |
| } |
| |
| 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); |
| if (r < 0) |
| return table_log_sort_error(r); |
| |
| table_set_header(table, arg_legend); |
| |
| r = table_print(table, NULL); |
| if (r < 0) |
| return table_log_print_error(r); |
| } |
| |
| 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%sExecute a process while inhibiting shutdown/sleep/idle.%s\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, |
| ansi_highlight(), |
| ansi_normal(), |
| 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(); |
| } |
| |
| 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 bus_log_connect_error(r, BUS_TRANSPORT_LOCAL); |
| |
| 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 = -EBADF; |
| pid_t pid; |
| |
| /* Ignore SIGINT and allow the forked process to receive it */ |
| (void) ignore_signals(SIGINT); |
| |
| if (!arg_who) { |
| w = strv_join(argv + optind, " "); |
| if (!w) |
| return log_oom(); |
| |
| arg_who = w; |
| } |
| |
| 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); |
