/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** 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" #include "sd-readahead.h" static bool arg_ready = false; static pid_t arg_pid = 0; static const char *arg_status = NULL; static bool arg_booted = false; static const char *arg_readahead = NULL; 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" " --readahead=ACTION Controls read-ahead operations\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, ARG_READAHEAD }; 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 }, { "readahead", required_argument, NULL, ARG_READAHEAD }, { 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 ARG_READAHEAD: arg_readahead = optarg; 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 && !arg_readahead) { 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 = EXIT_FAILURE; log_parse_environment(); log_open(); if ((r = parse_argv(argc, argv)) <= 0) { retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; goto finish; } if (arg_booted) return sd_booted() <= 0; if (arg_readahead) { if ((r = sd_readahead(arg_readahead)) < 0) { log_error("Failed to issue read-ahead control command: %s", strerror(-r)); goto finish; } } 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 = EXIT_SUCCESS; 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 ? EXIT_FAILURE : EXIT_SUCCESS; finish: free(status); free(cpid); free(n); strv_free(final_env); return retval; }