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-rw-r--r--misc/getttyent.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/misc/getttyent.c b/misc/getttyent.c
index 3295a6edac..dfc57d5ce8 100644
--- a/misc/getttyent.c
+++ b/misc/getttyent.c
@@ -33,6 +33,7 @@ static char sccsid[] = "@(#)getttyent.c 8.1 (Berkeley) 6/4/93";
#include <ttyent.h>
#include <stdio.h>
+#include <stdio_ext.h>
#include <ctype.h>
#include <string.h>
@@ -190,8 +191,11 @@ setttyent()
if (tf) {
(void)rewind(tf);
return (1);
- } else if ((tf = fopen(_PATH_TTYS, "r")))
+ } else if ((tf = fopen(_PATH_TTYS, "r"))) {
+ /* We do the locking ourselves. */
+ __fsetlocking (tf, FSETLOCKING_BYCALLER);
return (1);
+ }
return (0);
}