5430f7f2bc
We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.
229 lines
6.7 KiB
C
229 lines
6.7 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdio.h>
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#include <getopt.h>
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#include <error.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <systemd/sd-daemon.h>
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#include "strv.h"
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#include "util.h"
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#include "log.h"
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#include "sd-readahead.h"
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#include "build.h"
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static bool arg_ready = false;
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static pid_t arg_pid = 0;
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static const char *arg_status = NULL;
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static bool arg_booted = false;
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static const char *arg_readahead = NULL;
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static int help(void) {
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printf("%s [OPTIONS...] [VARIABLE=VALUE...]\n\n"
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"Notify the init system about service status updates.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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" --ready Inform the init system about service start-up completion\n"
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" --pid[=PID] Set main pid of daemon\n"
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" --status=TEXT Set status text\n"
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" --booted Returns 0 if the system was booted up with systemd, non-zero otherwise\n"
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" --readahead=ACTION Controls read-ahead operations\n",
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program_invocation_short_name);
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return 0;
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}
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static int parse_argv(int argc, char *argv[]) {
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enum {
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ARG_READY = 0x100,
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ARG_VERSION,
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ARG_PID,
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ARG_STATUS,
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ARG_BOOTED,
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ARG_READAHEAD
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};
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static const struct option options[] = {
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, ARG_VERSION },
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{ "ready", no_argument, NULL, ARG_READY },
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{ "pid", optional_argument, NULL, ARG_PID },
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{ "status", required_argument, NULL, ARG_STATUS },
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{ "booted", no_argument, NULL, ARG_BOOTED },
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{ "readahead", required_argument, NULL, ARG_READAHEAD },
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{ NULL, 0, NULL, 0 }
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};
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int c;
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assert(argc >= 0);
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assert(argv);
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while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
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switch (c) {
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case 'h':
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help();
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return 0;
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case ARG_VERSION:
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puts(PACKAGE_STRING);
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puts(DISTRIBUTION);
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puts(SYSTEMD_FEATURES);
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return 0;
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case ARG_READY:
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arg_ready = true;
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break;
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case ARG_PID:
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if (optarg) {
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if (parse_pid(optarg, &arg_pid) < 0) {
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log_error("Failed to parse PID %s.", optarg);
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return -EINVAL;
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}
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} else
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arg_pid = getppid();
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break;
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case ARG_STATUS:
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arg_status = optarg;
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break;
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case ARG_BOOTED:
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arg_booted = true;
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break;
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case ARG_READAHEAD:
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arg_readahead = optarg;
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break;
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case '?':
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return -EINVAL;
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default:
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log_error("Unknown option code %c", c);
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return -EINVAL;
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}
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}
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if (optind >= argc &&
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!arg_ready &&
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!arg_status &&
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!arg_pid &&
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!arg_booted &&
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!arg_readahead) {
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help();
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return -EINVAL;
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}
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return 1;
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}
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int main(int argc, char* argv[]) {
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char* our_env[4], **final_env = NULL;
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unsigned i = 0;
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char *status = NULL, *cpid = NULL, *n = NULL;
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int r, retval = EXIT_FAILURE;
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log_parse_environment();
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log_open();
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if ((r = parse_argv(argc, argv)) <= 0) {
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retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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goto finish;
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}
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if (arg_booted)
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return sd_booted() <= 0;
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if (arg_readahead) {
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if ((r = sd_readahead(arg_readahead)) < 0) {
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log_error("Failed to issue read-ahead control command: %s", strerror(-r));
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goto finish;
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}
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}
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if (arg_ready)
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our_env[i++] = (char*) "READY=1";
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if (arg_status) {
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if (!(status = strappend("STATUS=", arg_status))) {
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log_error("Failed to allocate STATUS string.");
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goto finish;
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}
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our_env[i++] = status;
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}
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if (arg_pid > 0) {
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if (asprintf(&cpid, "MAINPID=%lu", (unsigned long) arg_pid) < 0) {
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log_error("Failed to allocate MAINPID string.");
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goto finish;
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}
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our_env[i++] = cpid;
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}
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our_env[i++] = NULL;
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if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
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log_error("Failed to merge string sets.");
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goto finish;
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}
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if (strv_length(final_env) <= 0) {
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retval = EXIT_SUCCESS;
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goto finish;
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}
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if (!(n = strv_join(final_env, "\n"))) {
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log_error("Failed to concatenate strings.");
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goto finish;
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}
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if ((r = sd_notify(false, n)) < 0) {
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log_error("Failed to notify init system: %s", strerror(-r));
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goto finish;
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}
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retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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finish:
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free(status);
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free(cpid);
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free(n);
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strv_free(final_env);
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return retval;
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}
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