1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
30 #include <systemd/sd-daemon.h>
35 #include "sd-readahead.h"
39 static bool arg_ready = false;
40 static pid_t arg_pid = 0;
41 static const char *arg_status = NULL;
42 static bool arg_booted = false;
43 static const char *arg_readahead = NULL;
45 static int help(void) {
47 printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
48 "Notify the init system about service status updates.\n\n"
49 " -h --help Show this help\n"
50 " --version Show package version\n"
51 " --ready Inform the init system about service start-up completion\n"
52 " --pid[=PID] Set main pid of daemon\n"
53 " --status=TEXT Set status text\n"
54 " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n"
55 " --readahead=ACTION Controls read-ahead operations\n",
56 program_invocation_short_name);
61 static int parse_argv(int argc, char *argv[]) {
72 static const struct option options[] = {
73 { "help", no_argument, NULL, 'h' },
74 { "version", no_argument, NULL, ARG_VERSION },
75 { "ready", no_argument, NULL, ARG_READY },
76 { "pid", optional_argument, NULL, ARG_PID },
77 { "status", required_argument, NULL, ARG_STATUS },
78 { "booted", no_argument, NULL, ARG_BOOTED },
79 { "readahead", required_argument, NULL, ARG_READAHEAD },
88 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
98 puts(SYSTEMD_FEATURES);
108 if (parse_pid(optarg, &arg_pid) < 0) {
109 log_error("Failed to parse PID %s.", optarg);
126 arg_readahead = optarg;
133 log_error("Unknown option code %c", c);
138 if (optind >= argc &&
151 int main(int argc, char* argv[]) {
152 char* our_env[4], **final_env = NULL;
154 char *status = NULL, *cpid = NULL, *n = NULL;
155 int r, retval = EXIT_FAILURE;
157 log_parse_environment();
160 if ((r = parse_argv(argc, argv)) <= 0) {
161 retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
166 return sd_booted() <= 0;
169 if ((r = sd_readahead(arg_readahead)) < 0) {
170 log_error("Failed to issue read-ahead control command: %s", strerror(-r));
176 our_env[i++] = (char*) "READY=1";
179 if (!(status = strappend("STATUS=", arg_status))) {
180 log_error("Failed to allocate STATUS string.");
184 our_env[i++] = status;
188 if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) {
189 log_error("Failed to allocate MAINPID string.");
198 if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
199 log_error("Failed to merge string sets.");
203 if (strv_length(final_env) <= 0) {
204 retval = EXIT_SUCCESS;
208 if (!(n = strv_join(final_env, "\n"))) {
209 log_error("Failed to concatenate strings.");
213 if ((r = sd_notify(false, n)) < 0) {
214 log_error("Failed to notify init system: %s", strerror(-r));
218 retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS;
225 strv_free(final_env);