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From aa23eb11cab247e713a19957eaaa80f7b5454ddc Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Sat, 24 Sep 2016 20:58:04 -0400
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Subject: [PATCH] systemctl: suppress errors with "show" for nonexistent units
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and properties
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Show is documented to be program-parseable, and printing the warning about
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about a non-existent unit, while useful for humans, broke a lot of scripts.
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Restore previous behaviour of returning success and printing empty or useless
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stuff for units which do not exist, and printing empty values for properties
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which do not exists.
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With SYSTEMD_LOG_LEVEL=debug, hints are printed, but the return value is
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still 0.
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This undoes parts of e33a06a and 3dced37b7 and fixes #3856.
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We might consider adding an explicit switch to fail on missing units/properties
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(e.g. --ensure-exists or similar), and make -P foobar equivalent to
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--ensure-exists --property=foobar.
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Cherry-picked from: bd5b9f0a12dd9c1947b11534e99c395ddf44caa9
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Resolves: #1380686
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---
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src/systemctl/systemctl.c | 9 ++++++---
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1 file changed, 6 insertions(+), 3 deletions(-)
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diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
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index 0644784..a578897 100644
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--- a/src/systemctl/systemctl.c
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+++ b/src/systemctl/systemctl.c
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@@ -4272,12 +4272,14 @@ static int show_one(
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return log_error_errno(r, "Failed to map properties: %s", bus_error_message(&error, r));
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if (streq_ptr(info.load_state, "not-found") && streq_ptr(info.active_state, "inactive")) {
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- log_error("Unit %s could not be found.", unit);
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+ log_full(streq(verb, "status") ? LOG_ERR : LOG_DEBUG,
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+ "Unit %s could not be found.", unit);
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if (streq(verb, "status"))
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return EXIT_PROGRAM_OR_SERVICES_STATUS_UNKNOWN;
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- return -ENOENT;
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+ if (!streq(verb, "show"))
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+ return -ENOENT;
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}
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r = sd_bus_message_rewind(reply, true);
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@@ -4343,10 +4345,11 @@ static int show_one(
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if (show_properties) {
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char **pp;
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+ int not_found_level = streq(verb, "show") ? LOG_DEBUG : LOG_WARNING;
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STRV_FOREACH(pp, arg_properties) {
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if (!set_contains(found_properties, *pp)) {
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- log_warning("Property %s does not exist.", *pp);
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+ log_full(not_found_level, "Property %s does not exist.", *pp);
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r = -ENXIO;
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}
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}
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