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-rw-r--r--login/getutline_r.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/login/getutline_r.c b/login/getutline_r.c
index 0956164eab..965d46ce8f 100644
--- a/login/getutline_r.c
+++ b/login/getutline_r.c
@@ -47,6 +47,7 @@ getutline_r (const struct utmp *line, struct utmp **utmp,
       if (read (utmp_data->ut_fd, &utmp_data->ubuf, sizeof (struct utmp))
 	  != sizeof (struct utmp))
 	{
+	  utmp_data->loc_utmp = 0; /* Mark UTMP_DATA->ubuf invalid.  */
 	  errno = ESRCH;
 	  return -1;
 	}