Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 318 insertions, 0 deletions

diff --git a/src/login/inhibit.c b/src/login/inhibit.c
new file mode 100644
index 0000000..ad73c4b
--- /dev/null
+++ b/src/login/inhibit.c
@@ -0,0 +1,318 @@
+/* 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-locator.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 = bus_call_method(bus, bus_login_mgr, "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 = bus_call_method(bus, bus_login_mgr, "ListInhibitors", &error, &reply, NULL);
+        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) pid_get_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);
+
+        /* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long()
+         * that checks for GNU extensions in optstring ('-' or '+' at the beginning). */
+        optind = 0;
+        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_SIGTERM|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);