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"
38 static bool arg_ready = false;
39 static pid_t arg_pid = 0;
40 static const char *arg_status = NULL;
41 static bool arg_booted = false;
42 static const char *arg_readahead = NULL;
44 static int help(void) {
46 printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
47 "Notify the init system about service status updates.\n\n"
48 " -h --help Show this help\n"
49 " --version Show package version\n"
50 " --ready Inform the init system about service start-up completion\n"
51 " --pid[=PID] Set main pid of daemon\n"
52 " --status=TEXT Set status text\n"
53 " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n"
54 " --readahead=ACTION Controls read-ahead operations\n",
55 program_invocation_short_name);
60 static int parse_argv(int argc, char *argv[]) {
71 static const struct option options[] = {
72 { "help", no_argument, NULL, 'h' },
73 { "version", no_argument, NULL, ARG_VERSION },
74 { "ready", no_argument, NULL, ARG_READY },
75 { "pid", optional_argument, NULL, ARG_PID },
76 { "status", required_argument, NULL, ARG_STATUS },
77 { "booted", no_argument, NULL, ARG_BOOTED },
78 { "readahead", required_argument, NULL, ARG_READAHEAD },
87 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
97 puts(SYSTEMD_FEATURES);
107 if (parse_pid(optarg, &arg_pid) < 0) {
108 log_error("Failed to parse PID %s.", optarg);
125 arg_readahead = optarg;
132 log_error("Unknown option code %c", c);
137 if (optind >= argc &&
150 int main(int argc, char* argv[]) {
151 char* our_env[4], **final_env = NULL;
153 char *status = NULL, *cpid = NULL, *n = NULL;
154 int r, retval = EXIT_FAILURE;
156 log_parse_environment();
159 if ((r = parse_argv(argc, argv)) <= 0) {
160 retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
165 return sd_booted() <= 0;
168 if ((r = sd_readahead(arg_readahead)) < 0) {
169 log_error("Failed to issue read-ahead control command: %s", strerror(-r));
175 our_env[i++] = (char*) "READY=1";
178 if (!(status = strappend("STATUS=", arg_status))) {
179 log_error("Failed to allocate STATUS string.");
183 our_env[i++] = status;
187 if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) {
188 log_error("Failed to allocate MAINPID string.");
197 if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
198 log_error("Failed to merge string sets.");
202 if (strv_length(final_env) <= 0) {
203 retval = EXIT_SUCCESS;
207 if (!(n = strv_join(final_env, "\n"))) {
208 log_error("Failed to concatenate strings.");
212 if ((r = sd_notify(false, n)) < 0) {
213 log_error("Failed to notify init system: %s", strerror(-r));
217 retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS;
224 strv_free(final_env);