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authorMiles Bader <miles@gnu.org>1996-07-26 21:03:47 +0000
committerMiles Bader <miles@gnu.org>1996-07-26 21:03:47 +0000
commit4627647c99b7c269e1a325bd2beb1467589fb074 (patch)
tree8637d974f66c2bf55ed3add7276d8b20d6a0c834 /login
parentd4eaba51e77c56a64525896723991aaa033c74f3 (diff)
downloadglibc-4627647c99b7c269e1a325bd2beb1467589fb074.tar.gz
glibc-4627647c99b7c269e1a325bd2beb1467589fb074.tar.xz
glibc-4627647c99b7c269e1a325bd2beb1467589fb074.zip
Fri Jul 26 16:10:43 1996 Miles Bader <miles@gnu.ai.mit.edu>
	* login/pututline_r.c (pututline_r): Only call getutid_r if ID has a
	valid ut_id field.
	* login/getutid_r.c (getutid_r): Mark UTMP_DATA->loc_utmp invalid
	if a search fails.
Diffstat (limited to 'login')
-rw-r--r--login/pututline_r.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/login/pututline_r.c b/login/pututline_r.c
index 42994e899f..ada6059aae 100644
--- a/login/pututline_r.c
+++ b/login/pututline_r.c
@@ -62,8 +62,9 @@ pututline_r (const struct utmp *id, struct utmp_data *utmp_data)
   /* Check whether we need to reposition.  Repositioning is necessary
      either if the data in UTMP_DATA is not valid or if the ids don't
      match: */
-  if (utmp_data->loc_utmp < (off_t) sizeof (struct utmp)
-      || strncmp(utmp_data->ubuf.ut_id, id->ut_id, sizeof (id->ut_id)) != 0)
+  if (id->ut_id[0]
+      && (utmp_data->loc_utmp < (off_t) sizeof (struct utmp)
+	  || strncmp(utmp_data->ubuf.ut_id, id->ut_id, sizeof (id->ut_id)) != 0))
     {
       /* We must not overwrite the data in UTMP_DATA since ID may be
 	 aliasing it.  */