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systemctl: add new --show-transaction switch

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This new switch uses the new method call EnqueueUnitJob() for enqueuing
a job and showing the jobs it enqueued.

Fixes: #2297
This commit is contained in:
Lennart Poettering 2019-03-22 20:58:13 +01:00
parent 94369fc066
commit 85d9b5981b
1 changed files with 127 additions and 55 deletions
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182
src/systemctl/systemctl.c
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@ -114,6 +114,7 @@ static bool arg_dry_run = false;
static bool arg_quiet = false;
static bool arg_full = false;
static bool arg_recursive = false;
static bool arg_show_transaction = false;
static int arg_force = 0;
static bool arg_ask_password = false;
static bool arg_runtime = false;
@ -728,7 +729,6 @@ static int get_unit_list_recursive(
*_machines = NULL;
*_unit_infos = TAKE_PTR(unit_infos);
*_replies = TAKE_PTR(replies);
return c;
@ -2741,25 +2741,26 @@ static int check_triggering_units(sd_bus *bus, const char *name) {
}
static const struct {
const char *verb;
const char *method;
const char *verb; /* systemctl verb */
const char *method; /* Name of the specific D-Bus method */
const char *job_type; /* Job type when passing to the generic EnqueueUnitJob() method */
} unit_actions[] = {
{ "start", "StartUnit" },
{ "stop", "StopUnit" },
{ "condstop", "StopUnit" },
{ "reload", "ReloadUnit" },
{ "restart", "RestartUnit" },
{ "try-restart", "TryRestartUnit" },
{ "condrestart", "TryRestartUnit" },
{ "reload-or-restart", "ReloadOrRestartUnit" },
{ "try-reload-or-restart", "ReloadOrTryRestartUnit" },
{ "reload-or-try-restart", "ReloadOrTryRestartUnit" },
{ "condreload", "ReloadOrTryRestartUnit" },
{ "force-reload", "ReloadOrTryRestartUnit" }
{ "start", "StartUnit", "start" },
{ "stop", "StopUnit", "stop" },
{ "condstop", "StopUnit", "stop" }, /* legacy alias */
{ "reload", "ReloadUnit", "reload" },
{ "restart", "RestartUnit", "restart" },
{ "try-restart", "TryRestartUnit", "try-restart" },
{ "condrestart", "TryRestartUnit", "try-restart" }, /* legacy alias */
{ "reload-or-restart", "ReloadOrRestartUnit", "reload-or-restart" },
{ "try-reload-or-restart", "ReloadOrTryRestartUnit", "reload-or-try-restart" },
{ "reload-or-try-restart", "ReloadOrTryRestartUnit", "reload-or-try-restart" }, /* legacy alias */
{ "condreload", "ReloadOrTryRestartUnit", "reload-or-try-restart" }, /* legacy alias */
{ "force-reload", "ReloadOrTryRestartUnit", "reload-or-try-restart" }, /* legacy alias */
};
static const char *verb_to_method(const char *verb) {
uint i;
size_t i;
for (i = 0; i < ELEMENTSOF(unit_actions); i++)
if (streq_ptr(unit_actions[i].verb, verb))
@ -2768,14 +2769,14 @@ static const char *verb_to_method(const char *verb) {
return "StartUnit";
}
static const char *method_to_verb(const char *method) {
uint i;
static const char *verb_to_job_type(const char *verb) {
size_t i;
for (i = 0; i < ELEMENTSOF(unit_actions); i++)
if (streq_ptr(unit_actions[i].method, method))
return unit_actions[i].verb;
if (streq_ptr(unit_actions[i].verb, verb))
return unit_actions[i].job_type;
return "n/a";
return "start";
}
typedef struct {
@ -2932,7 +2933,8 @@ static int wait_context_watch(
static int start_unit_one(
sd_bus *bus,
const char *method,
const char *method, /* When using classic per-job bus methods */
const char *job_type, /* When using new-style EnqueueUnitJob() */
const char *name,
const char *mode,
sd_bus_error *error,
@ -2941,6 +2943,7 @@ static int start_unit_one(
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
const char *path;
bool done = false;
int r;
assert(method);
@ -2957,44 +2960,80 @@ static int start_unit_one(
log_debug("%s dbus call org.freedesktop.systemd1.Manager %s(%s, %s)",
arg_dry_run ? "Would execute" : "Executing",
method, name, mode);
if (arg_dry_run)
return 0;
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
method,
error,
&reply,
"ss", name, mode);
if (r < 0) {
const char *verb;
if (arg_show_transaction) {
_cleanup_(sd_bus_error_free) sd_bus_error enqueue_error = SD_BUS_ERROR_NULL;
/* There's always a fallback possible for legacy actions. */
if (arg_action != ACTION_SYSTEMCTL)
return r;
/* Use the new, fancy EnqueueUnitJob() API if the user wants us to print the transaction */
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
"EnqueueUnitJob",
&enqueue_error,
&reply,
"sss",
name, job_type, mode);
if (r < 0) {
if (!sd_bus_error_has_name(&enqueue_error, SD_BUS_ERROR_UNKNOWN_METHOD)) {
(void) sd_bus_error_move(error, &enqueue_error);
goto fail;
}
verb = method_to_verb(method);
/* Hmm, the API is not yet available. Let's use the classic API instead (see below). */
log_notice("--show-transaction not supported by this service manager, proceeding without.");
} else {
const char *u, *jt;
uint32_t id;
log_error("Failed to %s %s: %s", verb, name, bus_error_message(error, r));
r = sd_bus_message_read(reply, "uosos", &id, &path, &u, NULL, &jt);
if (r < 0)
return bus_log_parse_error(r);
if (!sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) &&
!sd_bus_error_has_name(error, BUS_ERROR_UNIT_MASKED) &&
!sd_bus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE))
log_error("See %s logs and 'systemctl%s status%s %s' for details.",
arg_scope == UNIT_FILE_SYSTEM ? "system" : "user",
arg_scope == UNIT_FILE_SYSTEM ? "" : " --user",
name[0] == '-' ? " --" : "",
name);
log_info("Enqueued anchor job %" PRIu32 " %s/%s.", id, u, jt);
return r;
r = sd_bus_message_enter_container(reply, 'a', "(uosos)");
if (r < 0)
return bus_log_parse_error(r);
for (;;) {
r = sd_bus_message_read(reply, "(uosos)", &id, NULL, &u, NULL, &jt);
if (r < 0)
return bus_log_parse_error(r);
if (r == 0)
break;
log_info("Enqueued auxiliary job %" PRIu32 " %s/%s.", id, u, jt);
}
r = sd_bus_message_exit_container(reply);
if (r < 0)
return bus_log_parse_error(r);
done = true;
}
}
r = sd_bus_message_read(reply, "o", &path);
if (r < 0)
return bus_log_parse_error(r);
if (!done) {
r = sd_bus_call_method(
bus,
"org.freedesktop.systemd1",
"/org/freedesktop/systemd1",
"org.freedesktop.systemd1.Manager",
method,
error,
&reply,
"ss", name, mode);
if (r < 0)
goto fail;
r = sd_bus_message_read(reply, "o", &path);
if (r < 0)
return bus_log_parse_error(r);
}
if (need_daemon_reload(bus, name) > 0)
warn_unit_file_changed(name);
@ -3007,6 +3046,24 @@ static int start_unit_one(
}
return 0;
fail:
/* There's always a fallback possible for legacy actions. */
if (arg_action != ACTION_SYSTEMCTL)
return r;
log_error_errno(r, "Failed to %s %s: %s", job_type, name, bus_error_message(error, r));
if (!sd_bus_error_has_name(error, BUS_ERROR_NO_SUCH_UNIT) &&
!sd_bus_error_has_name(error, BUS_ERROR_UNIT_MASKED) &&
!sd_bus_error_has_name(error, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE))
log_error("See %s logs and 'systemctl%s status%s %s' for details.",
arg_scope == UNIT_FILE_SYSTEM ? "system" : "user",
arg_scope == UNIT_FILE_SYSTEM ? "" : " --user",
name[0] == '-' ? " --" : "",
name);
return r;
}
static int expand_names(sd_bus *bus, char **names, const char* suffix, char ***ret) {
@ -3063,7 +3120,6 @@ static int expand_names(sd_bus *bus, char **names, const char* suffix, char ***r
}
*ret = TAKE_PTR(mangled);
return 0;
}
@ -3122,7 +3178,7 @@ static const char** make_extra_args(const char *extra_args[static 4]) {
static int start_unit(int argc, char *argv[], void *userdata) {
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_(wait_context_free) WaitContext wait_context = {};
const char *method, *mode, *one_name, *suffix = NULL;
const char *method, *job_type, *mode, *one_name, *suffix = NULL;
_cleanup_free_ char **stopped_units = NULL; /* Do not use _cleanup_strv_free_ */
_cleanup_strv_free_ char **names = NULL;
int r, ret = EXIT_SUCCESS;
@ -3148,27 +3204,34 @@ static int start_unit(int argc, char *argv[], void *userdata) {
action = verb_to_action(argv[0]);
if (action != _ACTION_INVALID) {
/* A command in style "systemctl reboot", "systemctl poweroff", … */
method = "StartUnit";
job_type = "start";
mode = action_table[action].mode;
one_name = action_table[action].target;
} else {
if (streq(argv[0], "isolate")) {
/* A "systemctl isolate <unit1> <unit2> …" command */
method = "StartUnit";
job_type = "start";
mode = "isolate";
suffix = ".target";
} else {
/* A command in style of "systemctl start <unit1> <unit2> …", "sysemctl stop <unit1> <unit2> …" and so on */
method = verb_to_method(argv[0]);
job_type = verb_to_job_type(argv[0]);
mode = arg_job_mode;
}
one_name = NULL;
}
} else {
/* A SysV legacy command such as "halt", "reboot", "poweroff", … */
assert(arg_action >= 0 && arg_action < _ACTION_MAX);
assert(action_table[arg_action].target);
assert(action_table[arg_action].mode);
method = "StartUnit";
job_type = "start";
mode = action_table[arg_action].mode;
one_name = action_table[arg_action].target;
}
@ -3201,9 +3264,11 @@ static int start_unit(int argc, char *argv[], void *userdata) {
NULL);
if (r < 0)
return log_error_errno(r, "Failed to enable subscription: %m");
r = sd_event_default(&wait_context.event);
if (r < 0)
return log_error_errno(r, "Failed to allocate event loop: %m");
r = sd_bus_attach_event(bus, wait_context.event, 0);
if (r < 0)
return log_error_errno(r, "Failed to attach bus to event loop: %m");
@ -3212,7 +3277,7 @@ static int start_unit(int argc, char *argv[], void *userdata) {
STRV_FOREACH(name, names) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
r = start_unit_one(bus, method, *name, mode, &error, w, arg_wait ? &wait_context : NULL);
r = start_unit_one(bus, method, job_type, *name, mode, &error, w, arg_wait ? &wait_context : NULL);
if (ret == EXIT_SUCCESS && r < 0)
ret = translate_bus_error_to_exit_status(r, &error);
@ -7534,6 +7599,8 @@ static int systemctl_help(void) {
" --reverse Show reverse dependencies with 'list-dependencies'\n"
" --job-mode=MODE Specify how to deal with already queued jobs, when\n"
" queueing a new job\n"
" -T --show-transaction\n"
" When enqueuing a unit job, show full transaction\n"
" --show-types When showing sockets, explicitly show their type\n"
" --value When showing properties, only print the value\n"
" -i --ignore-inhibitors\n"
@ -7941,6 +8008,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
{ "boot-loader-entry", required_argument, NULL, ARG_BOOT_LOADER_ENTRY },
{ "now", no_argument, NULL, ARG_NOW },
{ "message", required_argument, NULL, ARG_MESSAGE },
{ "show-transaction", no_argument, NULL, 'T' },
{}
};
@ -7952,7 +8020,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
/* we default to allowing interactive authorization only in systemctl (not in the legacy commands) */
arg_ask_password = true;
while ((c = getopt_long(argc, argv, "ht:p:alqfs:H:M:n:o:ir.::", options, NULL)) >= 0)
while ((c = getopt_long(argc, argv, "ht:p:alqfs:H:M:n:o:iTr.::", options, NULL)) >= 0)
switch (c) {
@ -8289,6 +8357,10 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
return log_oom();
break;
case 'T':
arg_show_transaction = true;
break;
case '.':
/* Output an error mimicking getopt, and print a hint afterwards */
log_error("%s: invalid option -- '.'", program_invocation_name);