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/>.
29 #include "systemd/sd-daemon.h"
34 #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 void help(void) {
45 printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
46 "Notify the init system about service status updates.\n\n"
47 " -h --help Show this help\n"
48 " --version Show package version\n"
49 " --ready Inform the init system about service start-up completion\n"
50 " --pid[=PID] Set main pid of daemon\n"
51 " --status=TEXT Set status text\n"
52 " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n"
53 " --readahead=ACTION Controls read-ahead operations\n",
54 program_invocation_short_name);
57 static int parse_argv(int argc, char *argv[]) {
68 static const struct option options[] = {
69 { "help", no_argument, NULL, 'h' },
70 { "version", no_argument, NULL, ARG_VERSION },
71 { "ready", no_argument, NULL, ARG_READY },
72 { "pid", optional_argument, NULL, ARG_PID },
73 { "status", required_argument, NULL, ARG_STATUS },
74 { "booted", no_argument, NULL, ARG_BOOTED },
75 { "readahead", required_argument, NULL, ARG_READAHEAD },
84 while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
94 puts(SYSTEMD_FEATURES);
104 if (parse_pid(optarg, &arg_pid) < 0) {
105 log_error("Failed to parse PID %s.", optarg);
122 arg_readahead = optarg;
129 assert_not_reached("Unhandled option");
133 if (optind >= argc &&
146 int main(int argc, char* argv[]) {
147 _cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL;
148 _cleanup_strv_free_ char **final_env = NULL;
153 log_parse_environment();
156 r = parse_argv(argc, argv);
161 return sd_booted() <= 0;
164 r = sd_readahead(arg_readahead);
166 log_error("Failed to issue read-ahead control command: %s", strerror(-r));
172 our_env[i++] = (char*) "READY=1";
175 status = strappend("STATUS=", arg_status);
181 our_env[i++] = status;
185 if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) {
195 final_env = strv_env_merge(2, our_env, argv + optind);
201 if (strv_length(final_env) <= 0) {
206 n = strv_join(final_env, "\n");
212 r = sd_pid_notify(arg_pid, false, n);
214 log_error("Failed to notify init system: %s", strerror(-r));
222 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;