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From 7569756d005d4f780fffd2504eb6f461982833f2 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Sat, 13 Oct 2018 14:38:46 +0200
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Subject: [PATCH] systemctl: clean up start_unit_one() error handling
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Let's split exit code handling in two: "r" is only used for errno-style
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errors, and "ret" is used for exit() codes. Then, let's use EXIT_SUCCESS
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for checking whether the latter is already used.
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This way it should always be clear what kind of error we are processing,
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and when we propaate one into the other.
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Moreover this allows us to drop "q" form all inner loops, avoiding
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confusion when to use "q" and when "r" to store received errors.
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Fixes: #9704
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(cherry picked from commit 0e8d9c0c4d7e71487c486f626c59853cfb031d16)
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Related: #846319
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---
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src/systemctl/systemctl.c | 32 +++++++++++++++-----------------
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1 file changed, 15 insertions(+), 17 deletions(-)
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diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
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index 1929692480..4af9deb98d 100644
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--- a/src/systemctl/systemctl.c
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+++ b/src/systemctl/systemctl.c
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@@ -3004,12 +3004,12 @@ static enum action verb_to_action(const char *verb) {
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static int start_unit(int argc, char *argv[], void *userdata) {
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_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
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+ _cleanup_(wait_context_free) WaitContext wait_context = {};
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const char *method, *mode, *one_name, *suffix = NULL;
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_cleanup_strv_free_ char **names = NULL;
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+ int r, ret = EXIT_SUCCESS;
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sd_bus *bus;
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- _cleanup_(wait_context_free) WaitContext wait_context = {};
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char **name;
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- int r = 0;
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if (arg_wait && !STR_IN_SET(argv[0], "start", "restart")) {
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log_error("--wait may only be used with the 'start' or 'restart' commands.");
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@@ -3096,16 +3096,15 @@ static int start_unit(int argc, char *argv[], void *userdata) {
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STRV_FOREACH(name, names) {
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_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
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- int q;
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- q = start_unit_one(bus, method, *name, mode, &error, w, arg_wait ? &wait_context : NULL);
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- if (r >= 0 && q < 0)
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- r = translate_bus_error_to_exit_status(q, &error);
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+ r = start_unit_one(bus, method, *name, mode, &error, w, arg_wait ? &wait_context : NULL);
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+ if (ret == EXIT_SUCCESS && r < 0)
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+ ret = translate_bus_error_to_exit_status(r, &error);
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}
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if (!arg_no_block) {
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- int q, arg_count = 0;
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const char* extra_args[4] = {};
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+ int arg_count = 0;
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if (arg_scope != UNIT_FILE_SYSTEM)
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extra_args[arg_count++] = "--user";
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@@ -3119,9 +3118,9 @@ static int start_unit(int argc, char *argv[], void *userdata) {
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extra_args[arg_count++] = arg_host;
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}
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- q = bus_wait_for_jobs(w, arg_quiet, extra_args);
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- if (q < 0)
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- return q;
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+ r = bus_wait_for_jobs(w, arg_quiet, extra_args);
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+ if (r < 0)
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+ return r;
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/* When stopping units, warn if they can still be triggered by
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* another active unit (socket, path, timer) */
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@@ -3130,16 +3129,15 @@ static int start_unit(int argc, char *argv[], void *userdata) {
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check_triggering_units(bus, *name);
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}
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- if (r >= 0 && arg_wait && !set_isempty(wait_context.unit_paths)) {
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- int q;
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- q = sd_event_loop(wait_context.event);
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- if (q < 0)
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- return log_error_errno(q, "Failed to run event loop: %m");
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+ if (ret == EXIT_SUCCESS && arg_wait && !set_isempty(wait_context.unit_paths)) {
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+ r = sd_event_loop(wait_context.event);
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+ if (r < 0)
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+ return log_error_errno(r, "Failed to run event loop: %m");
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if (wait_context.any_failed)
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- r = EXIT_FAILURE;
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+ ret = EXIT_FAILURE;
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}
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- return r;
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+ return ret;
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}
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#if ENABLE_LOGIND
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