+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdio.h>
+#include <getopt.h>
+#include <error.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "strv.h"
+#include "util.h"
+#include "log.h"
+#include "sd-daemon.h"
+
+static bool arg_ready = false;
+static pid_t arg_pid = 0;
+static const char *arg_status = NULL;
+
+static int 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"
+ " --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",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_READY = 0x100,
+ ARG_PID,
+ ARG_STATUS
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "ready", no_argument, NULL, ARG_READY },
+ { "pid", optional_argument, NULL, ARG_PID },
+ { "status", required_argument, NULL, ARG_STATUS },
+ { 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_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 '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
+int main(int argc, char* argv[]) {
+ char* our_env[4], **final_env = NULL;
+ unsigned i = 0;
+ char *status = NULL, *cpid = NULL, *n = NULL;
+ int r, retval = 1;
+
+ log_parse_environment();
+
+ if ((r = parse_argv(argc, argv)) <= 0) {
+ retval = r < 0;
+ goto finish;
+ }
+
+ if (arg_ready)
+ our_env[i++] = (char*) "READY=1";
+
+ if (arg_status) {
+ if (!(status = strappend("STATUS=", arg_status))) {
+ log_error("Failed to allocate STATUS string.");
+ goto finish;
+ }
+
+ our_env[i++] = status;
+ }
+
+ if (arg_pid > 0) {
+ if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) {
+ log_error("Failed to allocate MAINPID string.");
+ goto finish;
+ }
+
+ our_env[i++] = cpid;
+ }
+
+ our_env[i++] = NULL;
+
+ if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
+ log_error("Failed to merge string sets.");
+ goto finish;
+ }
+
+ if (strv_length(final_env) <= 0) {
+ retval = 0;
+ goto finish;
+ }
+
+ if (!(n = strv_join(final_env, "\n"))) {
+ log_error("Failed to concatenate strings.");
+ goto finish;
+ }
+
+ if ((r = sd_notify(false, n)) < 0) {
+ log_error("Failed to notify init system: %s", strerror(-r));
+ goto finish;
+ }
+
+ retval = r <= 0;
+
+finish:
+ free(status);
+ free(cpid);
+ free(n);
+
+ strv_free(final_env);
+
+ return retval;
+}
~ianmdlvl / elogind.git / commitdiff