diff options
Diffstat (limited to 'src/grp-utils/systemd-notify/notify.c')
| -rw-r--r-- | src/grp-utils/systemd-notify/notify.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/grp-utils/systemd-notify/notify.c b/src/grp-utils/systemd-notify/notify.c new file mode 100644 index 0000000000..c347c110a9 --- /dev/null +++ b/src/grp-utils/systemd-notify/notify.c @@ -0,0 +1,203 @@ +/*** + 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 Lesser General Public License as published by + the Free Software Foundation; either version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <errno.h> +#include <getopt.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <systemd/sd-daemon.h> + +#include "systemd-basic/alloc-util.h" +#include "systemd-basic/env-util.h" +#include "systemd-basic/formats-util.h" +#include "systemd-basic/log.h" +#include "systemd-basic/parse-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/strv.h" +#include "systemd-basic/util.h" + +static bool arg_ready = false; +static pid_t arg_pid = 0; +static const char *arg_status = NULL; +static bool arg_booted = false; + +static void 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" + " --version Show package version\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 Check if the system was booted up with systemd\n", + program_invocation_short_name); +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_READY = 0x100, + ARG_VERSION, + ARG_PID, + ARG_STATUS, + ARG_BOOTED, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "ready", no_argument, NULL, ARG_READY }, + { "pid", optional_argument, NULL, ARG_PID }, + { "status", required_argument, NULL, ARG_STATUS }, + { "booted", no_argument, NULL, ARG_BOOTED }, + {} + }; + + 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_VERSION: + return version(); + + 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: + assert_not_reached("Unhandled option"); + } + } + + if (optind >= argc && + !arg_ready && + !arg_status && + !arg_pid && + !arg_booted) { + help(); + return -EINVAL; + } + + return 1; +} + +int main(int argc, char* argv[]) { + _cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL; + _cleanup_strv_free_ char **final_env = NULL; + char* our_env[4]; + unsigned i = 0; + int r; + + log_parse_environment(); + log_open(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + if (arg_booted) + return sd_booted() <= 0; + + if (arg_ready) + our_env[i++] = (char*) "READY=1"; + + if (arg_status) { + status = strappend("STATUS=", arg_status); + if (!status) { + r = log_oom(); + goto finish; + } + + our_env[i++] = status; + } + + if (arg_pid > 0) { + if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) { + r = log_oom(); + goto finish; + } + + our_env[i++] = cpid; + } + + our_env[i++] = NULL; + + final_env = strv_env_merge(2, our_env, argv + optind); + if (!final_env) { + r = log_oom(); + goto finish; + } + + if (strv_length(final_env) <= 0) { + r = 0; + goto finish; + } + + n = strv_join(final_env, "\n"); + if (!n) { + r = log_oom(); + goto finish; + } + + r = sd_pid_notify(arg_pid ? arg_pid : getppid(), false, n); + if (r < 0) { + log_error_errno(r, "Failed to notify init system: %m"); + goto finish; + } else if (r == 0) { + log_error("No status data could be sent: $NOTIFY_SOCKET was not set"); + r = -EOPNOTSUPP; + } + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |