From: Lennart Poettering <lennart@poettering.net>
Date: Sun, 24 Dec 2017 17:50:17 +0000 (+0100)
Subject: process-util: debug log if PR_SET_NAME fails.
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=453bb6df25ef3999e6782b6ed846e0c78a1b49a5;p=elogind.git

process-util: debug log if PR_SET_NAME fails.
---

diff --git a/src/basic/process-util.c b/src/basic/process-util.c
index 5a00fca83..cb92bab0f 100644
--- a/src/basic/process-util.c
+++ b/src/basic/process-util.c
@@ -305,8 +305,10 @@ int rename_process(const char name[]) {
 
         l = strlen(name);
 
-        /* First step, change the comm field. */
-        (void) prctl(PR_SET_NAME, name);
+        /* First step, change the comm field. The main thread's comm is identical to the process comm. This means we
+         * can use PR_SET_NAME, which sets the thread name for the calling thread. */
+        if (prctl(PR_SET_NAME, name) < 0)
+                log_debug_errno(errno, "PR_SET_NAME failed: %m");
         if (l > 15) /* Linux process names can be 15 chars at max */
                 truncated = true;