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From cacf7a619cdccd9a6da6c2fe7361eac121b9ea0b Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 22 Mar 2019 20:58:13 +0100
Subject: [PATCH] systemctl: add new --show-transaction switch
This new switch uses the new method call EnqueueUnitJob() for enqueuing
a job and showing the jobs it enqueued.
Fixes: #2297
(cherry picked from commit 85d9b5981ba6b7ee3955f95fa6cf3bb8cdf3444d)
Resolves: #846319
---
src/systemctl/systemctl.c | 183 ++++++++++++++++++++++++++------------
1 file changed, 128 insertions(+), 55 deletions(-)
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index e7a8fd559f..8bec798373 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -126,6 +126,7 @@ 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;
@@ -734,7 +735,6 @@ static int get_unit_list_recursive(
*_machines = NULL;
*_unit_infos = TAKE_PTR(unit_infos);
-
*_replies = TAKE_PTR(replies);
return c;
@@ -2688,25 +2688,26 @@ 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))
@@ -2715,14 +2716,14 @@ 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 {
@@ -2805,7 +2806,8 @@ static int on_properties_changed(sd_bus_message *m, void *userdata, sd_bus_error
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,
@@ -2814,6 +2816,7 @@ 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);
@@ -2859,44 +2862,81 @@ 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_copy(error, &enqueue_error);
+ sd_bus_error_free(&enqueue_error);
+ goto fail;
+ }
+
+ /* 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;
- verb = method_to_verb(method);
+ r = sd_bus_message_read(reply, "uosos", &id, &path, &u, NULL, &jt);
+ if (r < 0)
+ return bus_log_parse_error(r);
- log_error("Failed to %s %s: %s", verb, name, bus_error_message(error, r));
+ log_info("Enqueued anchor job %" PRIu32 " %s/%s.", id, u, jt);
- 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);
+ 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;
- return r;
+ 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);
@@ -2909,6 +2949,24 @@ 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) {
@@ -2965,7 +3023,6 @@ static int expand_names(sd_bus *bus, char **names, const char* suffix, char ***r
}
*ret = TAKE_PTR(mangled);
-
return 0;
}
@@ -3024,7 +3081,7 @@ 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_strv_free_ char **names = NULL;
int r, ret = EXIT_SUCCESS;
sd_bus *bus;
@@ -3050,27 +3107,34 @@ 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;
}
@@ -3105,9 +3169,11 @@ 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");
@@ -3116,7 +3182,7 @@ 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);
}
@@ -7167,6 +7233,8 @@ static void 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"
@@ -7482,6 +7550,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
{ "firmware-setup", no_argument, NULL, ARG_FIRMWARE_SETUP },
{ "now", no_argument, NULL, ARG_NOW },
{ "message", required_argument, NULL, ARG_MESSAGE },
+ { "show-transaction", no_argument, NULL, 'T' },
{}
};
@@ -7494,7 +7563,7 @@ 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) {
@@ -7815,6 +7884,10 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
return log_oom();
break;
+ case 'T':
+ arg_show_transaction = true;
+ break;
+
case '?':
return -EINVAL;
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