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systemctl: give a nice hint about org.freedesktop.LogControl1 when applicable

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This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-09-11 16:00:22 +02:00
parent d94bab0805
commit e6e691aebf
1 changed files with 37 additions and 13 deletions
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50
src/systemctl/systemctl.c
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@ -6299,6 +6299,18 @@ static int switch_root(int argc, char *argv[], void *userdata) {
return 0;
}
static void give_log_control1_hint(const char *name) {
_cleanup_free_ char *link = NULL;
if (arg_quiet)
return;
(void) terminal_urlify_man("org.freedesktop.LogControl1", "5", &link);
log_notice("Hint: the service must declare BusName= and implement the appropriate D-Bus interface.\n"
" See the %s for details.", link ?: "org.freedesktop.LogControl1(5) man page");
}
static int log_setting_internal(sd_bus *bus, const BusLocator* bloc, const char *verb, const char *value) {
assert(bus);
assert(STR_IN_SET(verb, "log-level", "log-target", "service-log-level", "service-log-target"));
@ -6317,24 +6329,34 @@ static int log_setting_internal(sd_bus *bus, const BusLocator* bloc, const char
r = bus_set_property(bus, bloc,
level ? "LogLevel" : "LogTarget",
&error, "s", value);
if (r < 0)
return log_error_errno(r, "Failed to set log %s of %s to %s: %s",
level ? "level" : "target",
bloc->destination, value, bus_error_message(&error, r));
if (r >= 0)
return 0;
log_error_errno(r, "Failed to set log %s of %s to %s: %s",
level ? "level" : "target",
bloc->destination, value, bus_error_message(&error, r));
} else {
_cleanup_free_ char *t = NULL;
r = bus_get_property_string(bus, bloc,
level ? "LogLevel" : "LogTarget",
&error, &t);
if (r < 0)
return log_error_errno(r, "Failed to get log %s of %s: %s",
level ? "level" : "target",
bloc->destination, bus_error_message(&error, r));
puts(t);
if (r >= 0) {
puts(t);
return 0;
}
log_error_errno(r, "Failed to get log %s of %s: %s",
level ? "level" : "target",
bloc->destination, bus_error_message(&error, r));
}
return 0;
if (sd_bus_error_has_names(&error, SD_BUS_ERROR_UNKNOWN_METHOD,
SD_BUS_ERROR_UNKNOWN_OBJECT,
SD_BUS_ERROR_UNKNOWN_INTERFACE,
SD_BUS_ERROR_UNKNOWN_PROPERTY))
give_log_control1_hint(bloc->destination);
return r;
}
static int log_setting(int argc, char *argv[], void *userdata) {
@ -6372,9 +6394,11 @@ static int service_name_to_dbus(sd_bus *bus, const char *name, char **ret_dbus_n
return log_error_errno(r, "Failed to obtain BusName= property of %s: %s",
name, bus_error_message(&error, r));
if (isempty(bus_name))
return log_error_errno(SYNTHETIC_ERRNO(ENOLINK),
"Unit %s doesn't declare BusName=.", name);
if (isempty(bus_name)) {
log_error("Unit %s doesn't declare BusName=.", name);
give_log_control1_hint(name);
return -ENOLINK;
}
*ret_dbus_name = TAKE_PTR(bus_name);
return 0;