--- /usr/src/lib/libc/gen/syslog.c	2020/05/29 02:51:45	1.1
+++ /usr/src/lib/libc/gen/syslog.c	2020/05/29 03:34:37
@@ -201,15 +201,18 @@
 	}
 	/*
 	 * Application name, process ID, message ID and structured data.
-	 * Provide the process ID regardless of whether LOG_PID has been
-	 * specified, as it provides valuable information. Many
-	 * applications tend not to use this, even though they should.
 	 */
+
 	if (LogTag == NULL)
 		LogTag = _getprogname();
-	(void)fprintf(fp, "%s %d - - ",
-	    LogTag == NULL ? "-" : LogTag, getpid());
 
+	(void)fprintf(fp, "%s ", LogTag == NULL ? "-" : LogTag);
+
+	if (LogStat & LOG_PID)
+		(void)fprintf(fp, "%d - - ", getpid());
+	else
+		(void)fprintf(fp, "- - - ");
+ 
 	/* Check to see if we can skip expanding the %m */
 	if (strstr(fmt, "%m")) {
 
@@ -437,7 +440,17 @@
 {
 	if (ident != NULL)
 		LogTag = ident;
-	LogStat = logstat;
+
+	/*
+	 * Include the process ID by default: it provides valuable
+	 * information. Many applications tend not to use this, even
+	 * though they should.
+	 * Disable LOG_PID only if it is specifically masked.
+	 */
+	LogStat = logstat | LOG_PID;
+	if (logstat != 0 && (logstat &~ LOG_PID) == ~LOG_PID)
+		LogStat = 0;
+
 	if (logfac != 0 && (logfac &~ LOG_FACMASK) == 0)
 		LogFacility = logfac;
 
--- /usr/src/usr.bin/logger/logger.c	2020/05/28 22:17:28	1.1
+++ /usr/src/usr.bin/logger/logger.c	2020/05/29 04:07:28
@@ -171,8 +171,15 @@
 	if (tag == NULL)
 		tag = getlogin();
 	/* setup for logging */
-	if (host == NULL)
+	if (host == NULL) {
+		/*
+		 * LOG_PID is default for syslog(3) as of r332100.
+		 * To disable LOG_PID, set flags to its mask.
+		 */
+		if (( logflags & LOG_PID ) != LOG_PID)
+			logflags = ~logflags;
 		openlog(tag, logflags, 0);
+	}
 	(void) fclose(stdout);
 
 	(void )time(&now);