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varlink: add generic impl. of io.systemd.service.SetLogLevel()

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This commit is contained in:
David Tardon 2023-10-31 09:30:25 +01:00
parent ca46756cd8
commit 1263055121
2 changed files with 42 additions and 0 deletions
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41
src/shared/varlink-io.systemd.service.c
View File

@ -1,5 +1,7 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <unistd.h>
#include "varlink-io.systemd.service.h"
static VARLINK_DEFINE_METHOD(Ping);
@ -27,3 +29,42 @@ int varlink_method_ping(Varlink *link, JsonVariant *parameters, VarlinkMethodFla
return varlink_reply(link, NULL);
}
int varlink_method_set_log_level(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata) {
static const JsonDispatch dispatch_table[] = {
{"level", JSON_VARIANT_INTEGER, json_dispatch_int64, 0, JSON_MANDATORY},
{}
};
int64_t level;
uid_t uid;
int r;
assert(link);
assert(parameters);
/* NOTE: The method does have 1 parameter, but we must compare to 2 here, because
* json_variant_elements() breaks abstraction and exposes internal structure of JsonObject. */
if (json_variant_elements(parameters) != 2)
return varlink_error_invalid_parameter(link, parameters);
r = json_dispatch(parameters, dispatch_table, NULL, 0, &level);
if (r < 0)
return r;
if (LOG_PRI(level) != level)
return varlink_error_invalid_parameter(link, parameters);
r = varlink_get_peer_uid(link, &uid);
if (r < 0)
return r;
if (uid != getuid() && uid != 0)
return varlink_error(link, VARLINK_ERROR_PERMISSION_DENIED, parameters);
log_debug("Received io.systemd.service.SetLogLevel(%" PRIi64 ")", level);
log_set_max_level(level);
return varlink_reply(link, NULL);
}

1
src/shared/varlink-io.systemd.service.h
View File

@ -7,3 +7,4 @@
extern const VarlinkInterface vl_interface_io_systemd_service;
int varlink_method_ping(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata);
int varlink_method_set_log_level(Varlink *link, JsonVariant *parameters, VarlinkMethodFlags flags, void *userdata);