From 06cfdceb6c8993e73b4daaf984e0785ea75ddc34 Mon Sep 17 00:00:00 2001
From: cognet <cognet@FreeBSD.org>
Date: Tue, 21 Feb 2006 13:01:00 +0000
Subject: In wall and who, check that the utmp entry isn't stalled, as it is
 done in w. Apparently with the new pts code stalled entries are printed, when
 they are not with the BSD ptys.

Submitted by:	Michal Mertl <mime at traveller dot cz>
---
 usr.bin/who/who.c | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

(limited to 'usr.bin/who/who.c')

diff --git a/usr.bin/who/who.c b/usr.bin/who/who.c
index 27b6896..f94fcdb 100644
--- a/usr.bin/who/who.c
+++ b/usr.bin/who/who.c
@@ -27,6 +27,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <sys/param.h>
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <sys/stat.h>
@@ -203,14 +204,31 @@ row(struct utmp *ut)
 	putchar('\n');
 }
 
+static int
+ttystat(char *line, int sz)
+{
+	struct stat sb;
+	char ttybuf[MAXPATHLEN];
+
+	(void)snprintf(ttybuf, sizeof(ttybuf), "%s%.*s", _PATH_DEV, sz, line);
+	if (stat(ttybuf, &sb) == 0) {
+		return (0);
+	} else
+		return (-1);
+}
+
 static void
 process_utmp(FILE *fp)
 {
 	struct utmp ut;
 
-	while (fread(&ut, sizeof(ut), 1, fp) == 1)
-		if (*ut.ut_name != '\0')
-			row(&ut);
+	while (fread(&ut, sizeof(ut), 1, fp) == 1) {
+		if (*ut.ut_name == '\0')
+			continue;
+		if (ttystat(ut.ut_line, UT_LINESIZE) != 0)
+			continue;
+		row(&ut);
+	}
 }
 
 static void
-- 
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