| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2013 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 <stdio.h> |
| #include <getopt.h> |
| |
| #include "sd-bus.h" |
| #include "bus-internal.h" |
| #include "bus-message.h" |
| #include "strv.h" |
| #include "build.h" |
| #include "unit-name.h" |
| |
| static bool arg_scope = false; |
| static bool arg_user = false; |
| static const char *arg_unit = NULL; |
| static const char *arg_description = NULL; |
| static const char *arg_slice = NULL; |
| |
| static int help(void) { |
| |
| printf("%s [OPTIONS...] [COMMAND LINE...]\n\n" |
| "Notify the init system about service status updates.\n\n" |
| " -h --help Show this help\n" |
| " --version Show package version\n" |
| " --user Run as user unit\n" |
| " --scope Run this as scope rather than service\n" |
| " --unit=UNIT Run under the specified unit name\n" |
| " --description=TEXT Description for unit\n" |
| " --slice=SLICE Run in the specified slice\n", |
| program_invocation_short_name); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| |
| enum { |
| ARG_VERSION = 0x100, |
| ARG_USER, |
| ARG_SCOPE, |
| ARG_UNIT, |
| ARG_DESCRIPTION, |
| ARG_SLICE |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "user", no_argument, NULL, ARG_USER }, |
| { "scope", no_argument, NULL, ARG_SCOPE }, |
| { "unit", required_argument, NULL, ARG_UNIT }, |
| { "description", required_argument, NULL, ARG_DESCRIPTION }, |
| { "slice", required_argument, NULL, ARG_SLICE }, |
| { 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_VERSION: |
| puts(PACKAGE_STRING); |
| puts(SYSTEMD_FEATURES); |
| return 0; |
| |
| case ARG_USER: |
| arg_user = true; |
| break; |
| |
| case ARG_SCOPE: |
| arg_scope = true; |
| break; |
| |
| case ARG_UNIT: |
| arg_unit = optarg; |
| break; |
| |
| case ARG_DESCRIPTION: |
| arg_description = optarg; |
| break; |
| |
| case ARG_SLICE: |
| arg_slice = optarg; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| log_error("Unknown option code %c", c); |
| return -EINVAL; |
| } |
| } |
| |
| if (optind >= argc) { |
| log_error("Command line to execute required."); |
| return -EINVAL; |
| } |
| |
| return 1; |
| } |
| |
| static int message_start_transient_unit_new(sd_bus *bus, const char *name, sd_bus_message **ret) { |
| _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
| int r; |
| |
| log_info("Running as unit %s.", name); |
| |
| r = sd_bus_message_new_method_call( |
| bus, |
| "org.freedesktop.systemd1", |
| "/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "StartTransientUnit", &m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "ss", name, "fail"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'a', "(sv)"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description); |
| if (r < 0) |
| return r; |
| |
| if (!isempty(arg_slice)) { |
| _cleanup_free_ char *slice; |
| |
| slice = unit_name_mangle_with_suffix(arg_slice, ".slice"); |
| if (!slice) |
| return -ENOMEM; |
| |
| r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); |
| if (r < 0) |
| return r; |
| } |
| |
| *ret = m; |
| m = NULL; |
| |
| return 0; |
| } |
| |
| static int message_start_transient_unit_send(sd_bus *bus, sd_bus_message *m, sd_bus_error *error, sd_bus_message **reply) { |
| int r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_send_with_reply_and_block(bus, m, 0, error, reply); |
| } |
| |
| static int start_transient_service( |
| sd_bus *bus, |
| char **argv, |
| sd_bus_error *error) { |
| |
| _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; |
| _cleanup_free_ char *name = NULL; |
| char **i; |
| int r; |
| |
| if (arg_unit) |
| name = unit_name_mangle_with_suffix(arg_unit, ".service"); |
| else |
| asprintf(&name, "run-%lu.service", (unsigned long) getpid()); |
| if (!name) |
| return -ENOMEM; |
| |
| r = message_start_transient_unit_new(bus, name, &m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'r', "sv"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "s", "ExecStart"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'v', "a(sasb)"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'a', "(sasb)"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'r', "sasb"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "s", argv[0]); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'a', "s"); |
| if (r < 0) |
| return r; |
| |
| STRV_FOREACH(i, argv) { |
| r = sd_bus_message_append(m, "s", *i); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "b", false); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| return message_start_transient_unit_send(bus, m, error, &reply); |
| } |
| |
| static int start_transient_scope( |
| sd_bus *bus, |
| char **argv, |
| sd_bus_error *error) { |
| |
| _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; |
| _cleanup_free_ char *name = NULL; |
| int r; |
| |
| if (arg_unit) |
| name = unit_name_mangle_with_suffix(arg_unit, ".scope"); |
| else |
| asprintf(&name, "run-%lu.scope", (unsigned long) getpid()); |
| if (!name) |
| return -ENOMEM; |
| |
| r = message_start_transient_unit_new(bus, name, &m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "(sv)", "PIDs", "au", 1, (uint32_t) getpid()); |
| if (r < 0) |
| return r; |
| |
| r = message_start_transient_unit_send(bus, m, error, &reply); |
| if (r < 0) |
| return r; |
| |
| execvp(argv[0], argv); |
| log_error("Failed to execute: %m"); |
| return -errno; |
| } |
| |
| int main(int argc, char* argv[]) { |
| sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_bus_unref_ sd_bus *bus = NULL; |
| _cleanup_free_ char *description = NULL; |
| int r; |
| |
| log_parse_environment(); |
| log_open(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| goto fail; |
| |
| if (!arg_description) { |
| description = strv_join(argv + optind, " "); |
| if (!description) { |
| r = log_oom(); |
| goto fail; |
| } |
| |
| arg_description = description; |
| } |
| |
| if (arg_user) |
| r = sd_bus_open_user(&bus); |
| else |
| r = sd_bus_open_system(&bus); |
| if (r < 0) { |
| log_error("Failed to create new bus connection: %s", strerror(-r)); |
| goto fail; |
| } |
| |
| if (arg_scope) |
| r = start_transient_scope(bus, argv + optind, &error); |
| else |
| r = start_transient_service(bus, argv + optind, &error); |
| if (r < 0) { |
| log_error("Failed start transient unit: %s", error.message ? error.message : strerror(-r)); |
| sd_bus_error_free(&error); |
| goto fail; |
| } |
| |
| fail: |
| return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |