#include <errno.h>

#include <getopt.h>

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include "sd-daemon.h"

#include "alloc-util.h"

#include "env-util.h"

#include "formats-util.h"

#include "log.h"

#include "parse-util.h"

#include "string-util.h"

#include "strv.h"

#include "util.h"

static bool arg_ready = false;

static pid_t arg_pid = 0;

static const char *arg_status = NULL;

static bool arg_booted = false;

static void help(void) {

printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"

"Notify the init system about service status updates.\n\n"

" -h --help Show this help\n"

" --version Show package version\n"

" --ready Inform the init system about service start-up completion\n"

" --pid[=PID] Set main pid of daemon\n"

" --status=TEXT Set status text\n"

" --booted Check if the system was booted up with systemd\n",

program_invocation_short_name);

}

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

enum {

ARG_READY = 0x100,

ARG_VERSION,

ARG_PID,

ARG_STATUS,

ARG_BOOTED,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "ready", no_argument, NULL, ARG_READY },

{ "pid", optional_argument, NULL, ARG_PID },

{ "status", required_argument, NULL, ARG_STATUS },

{ "booted", no_argument, NULL, ARG_BOOTED },

{}

};

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_READY:

arg_ready = true;

break;

case ARG_PID:

if (optarg) {

if (parse_pid(optarg, &arg_pid) < 0) {

log_error("Failed to parse PID %s.", optarg);

return -EINVAL;

}

} else

arg_pid = getppid();

break;

case ARG_STATUS:

arg_status = optarg;

break;

case ARG_BOOTED:

arg_booted = true;

break;

case '?':

return -EINVAL;

default:

assert_not_reached("Unhandled option");

}

}

if (optind >= argc &&

!arg_ready &&

!arg_status &&

!arg_pid &&

!arg_booted) {

help();

return -EINVAL;

}

return 1;

}

int main(int argc, char* argv[]) {

_cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL;

_cleanup_strv_free_ char **final_env = NULL;

char* our_env[4];

unsigned i = 0;

int r;

log_parse_environment();

log_open();

r = parse_argv(argc, argv);

if (r <= 0)

goto finish;

if (arg_booted)

return sd_booted() <= 0;

if (arg_ready)

our_env[i++] = (char*) "READY=1";

if (arg_status) {

status = strappend("STATUS=", arg_status);

if (!status) {

r = log_oom();

goto finish;

}

our_env[i++] = status;

}

if (arg_pid > 0) {

if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) {

r = log_oom();

goto finish;

}

our_env[i++] = cpid;

}

our_env[i++] = NULL;

final_env = strv_env_merge(2, our_env, argv + optind);

if (!final_env) {

r = log_oom();

goto finish;

}

if (strv_length(final_env) <= 0) {

r = 0;

goto finish;

}

n = strv_join(final_env, "\n");

if (!n) {

r = log_oom();

goto finish;

}

r = sd_pid_notify(arg_pid ? arg_pid : getppid(), false, n);

if (r < 0) {

log_error_errno(r, "Failed to notify init system: %m");

goto finish;

} else if (r == 0) {

log_error("No status data could be sent: $NOTIFY_SOCKET was not set");

r = -EOPNOTSUPP;

}

finish:

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}