From: Francis Deslauriers <francis.deslauriers@efficios.com>
Date: Thu, 15 Apr 2021 19:46:18 +0000 (-0400)
Subject: Allow users to create trigger with their uid
X-Git-Tag: v2.13.0-rc1~49
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=d84c8ae3fc703d9043eec97f1a5e61bef994da7b

Allow users to create trigger with their uid

Currently, the `add-trigger` prints the following if a user uses the
`--user-id` with its own uid:
  Error: Failed to set trigger's user identity.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: Ie0a642b3faf2259a892def3cb19a899e61cb4705
---

diff --git a/src/common/trigger.c b/src/common/trigger.c
index ec96fc80b..215501401 100644
--- a/src/common/trigger.c
+++ b/src/common/trigger.c
@@ -704,6 +704,7 @@ enum lttng_trigger_status lttng_trigger_set_owner_uid(
 		struct lttng_trigger *trigger, uid_t uid)
 {
 	enum lttng_trigger_status ret = LTTNG_TRIGGER_STATUS_OK;
+	const uid_t euid = geteuid();
 	const struct lttng_credentials creds = {
 		.uid = LTTNG_OPTIONAL_INIT_VALUE(uid),
 		.gid = LTTNG_OPTIONAL_INIT_UNSET,
@@ -715,7 +716,7 @@ enum lttng_trigger_status lttng_trigger_set_owner_uid(
 	}
 
 	/* Client-side validation only to report a clearer error. */
-	if (geteuid() != 0) {
+	if (euid != 0 && euid != uid) {
 		ret = LTTNG_TRIGGER_STATUS_PERMISSION_DENIED;
 		goto end;
 	}