#include <getopt.h>

#include <assert.h>

#include <stdlib.h>

#include <stdio.h>

#include <unistd.h>

#include <fcntl.h>

#include "sd-bus.h"

#include "bus-util.h"

#include "bus-error.h"

#include "util.h"

#include "build.h"

#include "strv.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 = "block";

static enum {

ACTION_INHIBIT,

ACTION_LIST

} arg_action = ACTION_INHIBIT;

static int inhibit(sd_bus *bus, sd_bus_error *error) {

_cleanup_bus_message_unref_ 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 -EIO;

r = dup(fd);

if (r < 0)

return -errno;

return r;

}

static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {

_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

const char *what, *who, *why, *mode;

unsigned int uid, pid;

unsigned n = 0;

int r;

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 -EIO;

while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {

_cleanup_free_ char *comm = NULL, *u = NULL;

get_process_comm(pid, &comm);

u = uid_to_name(uid);

printf(" Who: %s (UID %lu/%s, PID %lu/%s)\n"

" What: %s\n"

" Why: %s\n"

" Mode: %s\n\n",

who, (unsigned long) uid, strna(u), (unsigned long) pid, strna(comm),

what,

why,

mode);

n++;

}

if (r < 0)

return -EIO;

r = sd_bus_message_exit_container(reply);

if (r < 0)

return -EIO;

printf("%u inhibitors listed.\n", n);

return 0;

}

static int 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"

" --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);

return 0;

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_WHAT,

ARG_WHO,

ARG_WHY,

ARG_MODE,

ARG_LIST,

};

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 },

{ NULL, 0, NULL, 0 }

};

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:

puts(PACKAGE_STRING);

puts(SYSTEMD_FEATURES);

return 0;

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;

default:

log_error("Unknown option code %c", c);

return -EINVAL;

}

}

if (arg_action == ACTION_INHIBIT && argc == 1)

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_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

_cleanup_bus_unref_ sd_bus *bus = NULL;

int r;

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_open_system(&bus);

if (r < 0) {

log_error("Failed to connect to bus: %s", strerror(-r));

return EXIT_FAILURE;

}

if (arg_action == ACTION_LIST) {

r = print_inhibitors(bus, &error);

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;

if (!arg_who)

arg_who = w = strv_join(argv + optind, " ");

fd = inhibit(bus, &error);

if (fd < 0) {

log_error("Failed to inhibit: %s", bus_error_message(&error, -r));

return EXIT_FAILURE;

}

pid = fork();

if (pid < 0) {

log_error("Failed to fork: %m");

return EXIT_FAILURE;

}

if (pid == 0) {

/* Child */

close_all_fds(NULL, 0);

execvp(argv[optind], argv + optind);

log_error("Failed to execute %s: %m", argv[optind]);

_exit(EXIT_FAILURE);

}

r = wait_for_terminate_and_warn(argv[optind], pid);

return r < 0 ? EXIT_FAILURE : r;

}

return 0;

}