| /*-*- 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 bool arg_booted = false; |
| |
| 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" |
| " --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n", |
| program_invocation_short_name); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| |
| enum { |
| ARG_READY = 0x100, |
| ARG_PID, |
| ARG_STATUS, |
| ARG_BOOTED |
| }; |
| |
| 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 }, |
| { "booted", no_argument, NULL, ARG_BOOTED }, |
| { 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 ARG_BOOTED: |
| arg_booted = true; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| log_error("Unknown option code %c", c); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind >= argc && |
| !arg_ready && |
| !arg_status && |
| !arg_pid && |
| !arg_booted) { |
| help(); |
| 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_booted) |
| return sd_booted() <= 0; |
| |
| 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; |
| } |