X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Frun%2Frun.c;h=18a4920f0371fd91bb5d1c0e3e775241554e73f6;hp=9f8bda48af35f9ffdb8adac48f0a9f4384641f51;hb=68313d3dfa2082dae8a06643d639e0200afc19fc;hpb=c2756a68401102786be343712c0c35acbd73d28d diff --git a/src/run/run.c b/src/run/run.c index 9f8bda48a..18a4920f0 100644 --- a/src/run/run.c +++ b/src/run/run.c @@ -20,22 +20,136 @@ ***/ #include +#include #include "sd-bus.h" #include "bus-internal.h" #include "bus-message.h" #include "strv.h" +#include "build.h" +#include "unit-name.h" +#include "path-util.h" + +static bool arg_scope = false; +static bool arg_user = 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 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" + " --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", + program_invocation_short_name); + + return 0; +} -static int start_transient_service( - sd_bus *bus, - const char *name, - char **argv, - sd_bus_error *error) { +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_USER, + ARG_SCOPE, + ARG_UNIT, + ARG_DESCRIPTION, + ARG_SLICE, + ARG_SEND_SIGHUP, + }; + + 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 }, + { "remain-after-exit", no_argument, NULL, 'r' }, + { "send-sighup", no_argument, NULL, ARG_SEND_SIGHUP }, + { NULL, 0, NULL, 0 }, + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "+hr", 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 ARG_SEND_SIGHUP: + arg_send_sighup = true; + break; + + case 'r': + arg_remain_after_exit = true; + break; + + case '?': + return -EINVAL; + + default: + log_error("Unknown option code %c", c); + return -EINVAL; + } + } - _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL; - char **i; + 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", @@ -53,6 +167,67 @@ static int start_transient_service( 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; + } + + 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; + + 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_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit); + if (r < 0) + return r; + r = sd_bus_message_open_container(m, 'r', "sv"); if (r < 0) return r; @@ -111,42 +286,87 @@ static int start_transient_service( if (r < 0) return r; - r = sd_bus_message_close_container(m); + 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; - return sd_bus_send_with_reply_and_block(bus, m, 0, error, &reply); + 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 *name = NULL; + _cleanup_free_ char *description = NULL, *command = NULL; int r; log_parse_environment(); log_open(); - if (argc < 2) { - log_error("Missing command line."); - r = -EINVAL; + r = parse_argv(argc, argv); + if (r <= 0) goto fail; - } - r = sd_bus_open_user(&bus); + r = find_binary(argv[optind], &command); if (r < 0) { - log_error("Failed to create new bus: %s", strerror(-r)); + log_error("Failed to find executable %s: %s", argv[optind], strerror(-r)); goto fail; } + argv[optind] = command; - if (asprintf(&name, "run-%lu.service", (unsigned long) getpid()) < 0) { - r = log_oom(); + 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; } - r = start_transient_service(bus, name, argv + 1, &error); + 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 service: %s", error.message); + log_error("Failed start transient unit: %s", error.message ? error.message : strerror(-r)); sd_bus_error_free(&error); goto fail; }