git: 77c0992af4e3 - stable/13 - syslog: fix PID of forking process

The branch stable/13 has been updated by eugen:

URL: https://cgit.FreeBSD.org/src/commit/?id=77c0992af4e3b013915ae84ef3d831f470ea5dd5

commit 77c0992af4e3b013915ae84ef3d831f470ea5dd5
Author:     Eugene Grosbein <eugen@FreeBSD.org>
AuthorDate: 2023-01-03 08:53:47 +0000
Commit:     Eugene Grosbein <eugen@FreeBSD.org>
CommitDate: 2023-01-06 04:40:42 +0000

    syslog: fix PID of forking process
    
    Do not cache PID for a process that does not fabricate it,
    calls openlog() before forking and does not call exec() thereafter.
    
    PR:             268666
    Fixes:          e9ae9fa93745669b7dd0341d333257ad6cfe8e37
    Tested by:      kp
    
    (cherry picked from commit 2ce3ef55035093cac7839e71e9ff91f5562ebc29)
---
 lib/libc/gen/syslog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/libc/gen/syslog.c b/lib/libc/gen/syslog.c
index fe3a2c902015..1209c5b88b82 100644
--- a/lib/libc/gen/syslog.c
+++ b/lib/libc/gen/syslog.c
@@ -223,7 +223,7 @@ vsyslog1(int pri, const char *fmt, va_list ap)
 	 * specified, as it provides valuable information. Many
 	 * applications tend not to use this, even though they should.
 	 */
-	if (LogPid == -1)
+	if (LogTagLength <= 0)
 		LogPid = getpid();
 	(void)fprintf(fp, "%d ", (int)LogPid);
 	/* Message ID. */