| /*-*- 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-util.h" |
| #include "strv.h" |
| #include "build.h" |
| #include "unit-name.h" |
| #include "path-util.h" |
| #include "bus-error.h" |
| |
| static bool arg_scope = false; |
| static bool arg_remain_after_exit = false; |
| static const char *arg_unit = NULL; |
| static const char *arg_description = NULL; |
| static const char *arg_slice = NULL; |
| static bool arg_send_sighup = false; |
| static BusTransport arg_transport = BUS_TRANSPORT_LOCAL; |
| static char *arg_host = NULL; |
| static bool arg_user = false; |
| static const char *arg_service_type = NULL; |
| static const char *arg_exec_user = NULL; |
| static const char *arg_exec_group = NULL; |
| static int arg_nice = 0; |
| static bool arg_nice_set = false; |
| static char **arg_environment = NULL; |
| |
| static int help(void) { |
| |
| printf("%s [OPTIONS...] COMMAND [ARGS...]\n\n" |
| "Run the specified command in a transient scope or service unit.\n\n" |
| " -h --help Show this help\n" |
| " --version Show package version\n" |
| " --user Run as user unit\n" |
| " -H --host=[USER@]HOST Operate on remote host\n" |
| " -M --machine=CONTAINER Operate on local container\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" |
| " -r --remain-after-exit Leave service around until explicitly stopped\n" |
| " --send-sighup Send SIGHUP when terminating\n" |
| " --service-type=TYPE Service type\n" |
| " --uid=USER Run as system user\n" |
| " --gid=GROUP Run as system group\n" |
| " --nice=NICE Nice level\n" |
| " --setenv=NAME=VALUE Set environment\n", |
| program_invocation_short_name); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| |
| enum { |
| ARG_VERSION = 0x100, |
| ARG_USER, |
| ARG_SYSTEM, |
| ARG_SCOPE, |
| ARG_UNIT, |
| ARG_DESCRIPTION, |
| ARG_SLICE, |
| ARG_SEND_SIGHUP, |
| ARG_EXEC_USER, |
| ARG_EXEC_GROUP, |
| ARG_SERVICE_TYPE, |
| ARG_NICE, |
| ARG_SETENV |
| }; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, ARG_VERSION }, |
| { "user", no_argument, NULL, ARG_USER }, |
| { "system", no_argument, NULL, ARG_SYSTEM }, |
| { "scope", no_argument, NULL, ARG_SCOPE }, |
| { "unit", required_argument, NULL, ARG_UNIT }, |
| { "description", required_argument, NULL, ARG_DESCRIPTION }, |
| { "slice", required_argument, NULL, ARG_SLICE }, |
| { "remain-after-exit", no_argument, NULL, 'r' }, |
| { "send-sighup", no_argument, NULL, ARG_SEND_SIGHUP }, |
| { "host", required_argument, NULL, 'H' }, |
| { "machine", required_argument, NULL, 'M' }, |
| { "service-type", required_argument, NULL, ARG_SERVICE_TYPE }, |
| { "uid", required_argument, NULL, ARG_EXEC_USER }, |
| { "gid", required_argument, NULL, ARG_EXEC_GROUP }, |
| { "nice", required_argument, NULL, ARG_NICE }, |
| { "setenv", required_argument, NULL, ARG_SETENV }, |
| {}, |
| }; |
| |
| int r, c; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "+hrH:M:", options, NULL)) >= 0) { |
| |
| switch (c) { |
| |
| case 'h': |
| return help(); |
| |
| case ARG_VERSION: |
| puts(PACKAGE_STRING); |
| puts(SYSTEMD_FEATURES); |
| return 0; |
| |
| case ARG_USER: |
| arg_user = true; |
| break; |
| |
| case ARG_SYSTEM: |
| arg_user = false; |
| 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 ARG_SEND_SIGHUP: |
| arg_send_sighup = true; |
| break; |
| |
| case 'r': |
| arg_remain_after_exit = true; |
| break; |
| |
| case 'H': |
| arg_transport = BUS_TRANSPORT_REMOTE; |
| arg_host = optarg; |
| break; |
| |
| case 'M': |
| arg_transport = BUS_TRANSPORT_CONTAINER; |
| arg_host = optarg; |
| break; |
| |
| case ARG_SERVICE_TYPE: |
| arg_service_type = optarg; |
| break; |
| |
| case ARG_EXEC_USER: |
| arg_exec_user = optarg; |
| break; |
| |
| case ARG_EXEC_GROUP: |
| arg_exec_group = optarg; |
| break; |
| |
| case ARG_NICE: |
| r = safe_atoi(optarg, &arg_nice); |
| if (r < 0) { |
| log_error("Failed to parse nice value"); |
| return -EINVAL; |
| } |
| |
| arg_nice_set = true; |
| break; |
| |
| case ARG_SETENV: |
| |
| if (strv_extend(&arg_environment, optarg) < 0) |
| return log_oom(); |
| |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached("Unhandled option"); |
| } |
| } |
| |
| if (optind >= argc) { |
| log_error("Command line to execute required."); |
| return -EINVAL; |
| } |
| |
| if (arg_user && arg_transport != BUS_TRANSPORT_LOCAL) { |
| log_error("Execution in user context is not supported on non-local systems."); |
| return -EINVAL; |
| } |
| |
| if (arg_scope && arg_transport != BUS_TRANSPORT_LOCAL) { |
| log_error("Scope execution is not supported on non-local systems."); |
| return -EINVAL; |
| } |
| |
| if (arg_scope && (arg_remain_after_exit || arg_service_type || arg_exec_user || arg_exec_group || arg_nice_set || arg_environment)) { |
| log_error("--remain-after-exit, --service-type=, --user=, --group=, --nice= and --setenv= are not supported in --scope mode."); |
| 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; |
| |
| assert(bus); |
| assert(name); |
| assert(ret); |
| |
| log_info("Running as unit %s.", name); |
| |
| r = sd_bus_message_new_method_call( |
| bus, |
| &m, |
| "org.freedesktop.systemd1", |
| "/org/freedesktop/systemd1", |
| "org.freedesktop.systemd1.Manager", |
| "StartTransientUnit"); |
| 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, MANGLE_NOGLOB, ".slice"); |
| if (!slice) |
| return -ENOMEM; |
| |
| r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice); |
| if (r < 0) |
| return r; |
| } |
| |
| r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", arg_send_sighup); |
| 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; |
| |
| assert(bus); |
| assert(m); |
| |
| r = sd_bus_message_close_container(m); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "a(sa(sv))", 0); |
| if (r < 0) |
| return r; |
| |
| return sd_bus_call(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; |
| _cleanup_free_ char *name = NULL; |
| int r; |
| |
| if (arg_unit) |
| name = unit_name_mangle_with_suffix(arg_unit, MANGLE_NOGLOB, ".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_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit); |
| if (r < 0) |
| return r; |
| |
| if (arg_service_type) { |
| r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_service_type); |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_exec_user) { |
| r = sd_bus_message_append(m, "(sv)", "User", "s", arg_exec_user); |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_exec_group) { |
| r = sd_bus_message_append(m, "(sv)", "Group", "s", arg_exec_group); |
| if (r < 0) |
| return r; |
| } |
| |
| if (arg_nice_set) { |
| r = sd_bus_message_append(m, "(sv)", "Nice", "i", arg_nice); |
| if (r < 0) |
| return r; |
| } |
| |
| if (!strv_isempty(arg_environment)) { |
| r = sd_bus_message_open_container(m, 'r', "sv"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append(m, "s", "Environment"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_open_container(m, 'v', "as"); |
| if (r < 0) |
| return r; |
| |
| r = sd_bus_message_append_strv(m, arg_environment); |
| 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_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_append_strv(m, argv); |
| 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, NULL); |
| } |
| |
| static int start_transient_scope( |
| sd_bus *bus, |
| char **argv, |
| sd_bus_error *error) { |
| |
| _cleanup_bus_message_unref_ sd_bus_message *m = NULL; |
| _cleanup_free_ char *name = NULL; |
| int r; |
| |
| assert(bus); |
| |
| if (arg_unit) |
| name = unit_name_mangle_with_suffix(arg_unit, MANGLE_NOGLOB, ".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, NULL); |
| if (r < 0) |
| return r; |
| |
| execvp(argv[0], argv); |
| log_error("Failed to execute: %m"); |
| return -errno; |
| } |
| |
| int main(int argc, char* argv[]) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| _cleanup_bus_unref_ sd_bus *bus = NULL; |
| _cleanup_free_ char *description = NULL, *command = NULL; |
| int r; |
| |
| log_parse_environment(); |
| log_open(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| goto finish; |
| |
| r = find_binary(argv[optind], &command); |
| if (r < 0) { |
| log_error("Failed to find executable %s: %s", argv[optind], strerror(-r)); |
| goto finish; |
| } |
| argv[optind] = command; |
| |
| if (!arg_description) { |
| description = strv_join(argv + optind, " "); |
| if (!description) { |
| r = log_oom(); |
| goto finish; |
| } |
| |
| arg_description = description; |
| } |
| |
| r = bus_open_transport(arg_transport, arg_host, arg_user, &bus); |
| if (r < 0) { |
| log_error("Failed to create bus connection: %s", strerror(-r)); |
| goto finish; |
| } |
| |
| 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", bus_error_message(&error, r)); |
| |
| finish: |
| return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |