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 r = parse_argv(argc, argv);
162 retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
167 return sd_booted() <= 0;
170 if ((r = sd_readahead(arg_readahead)) < 0) {
171 log_error("Failed to issue read-ahead control command: %s", strerror(-r));
177 our_env[i++] = (char*) "READY=1";
180 if (!(status = strappend("STATUS=", arg_status))) {
181 log_error("Failed to allocate STATUS string.");
185 our_env[i++] = status;
189 if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) {
190 log_error("Failed to allocate MAINPID string.");
199 if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
200 log_error("Failed to merge string sets.");
204 if (strv_length(final_env) <= 0) {
205 retval = EXIT_SUCCESS;
209 if (!(n = strv_join(final_env, "\n"))) {
210 log_error("Failed to concatenate strings.");
214 if ((r = sd_notify(false, n)) < 0) {
215 log_error("Failed to notify init system: %s", strerror(-r));
219 retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS;
226 strv_free(final_env);