* lib/idcache.c: Undo most recent patch, dated 2006-11-06.

It mishandled the case where the group was missing.
Problem reported by Greg Schafer.
* modules/idcache: Likewise.

ChangeLog

@@ -1,3 +1,10 @@
+2006-11-20  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* lib/idcache.c: Undo most recent patch, dated 2006-11-06.
+	It mishandled the case where the group was missing.
+	Problem reported by Greg Schafer.
+	* modules/idcache: Likewise.
+
 2006-11-18  Jim Meyering  <jim@meyering.net>
 
 	* check-module (%exempt_header): Add exception for some

lib/idcache.c

@@ -19,7 +19,6 @@
 
 #include <config.h>
 
-#include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
@@ -41,8 +40,8 @@ struct userid
       uid_t u;
       gid_t g;
     } id;
+  char *name;
   struct userid *next;
-  char name[FLEXIBLE_ARRAY_MEMBER];
 };
 
 static struct userid *user_alist;
@@ -57,17 +56,15 @@ getuser (uid_t uid)
 {
   register struct userid *tail;
   struct passwd *pwent;
-  char const *name;
 
   for (tail = user_alist; tail; tail = tail->next)
     if (tail->id.u == uid)
       return tail->name;
 
   pwent = getpwuid (uid);
-  name = pwent ? pwent->pw_name : "";
-  tail = xmalloc (offsetof (struct userid, name) + strlen (name) + 1);
+  tail = xmalloc (sizeof *tail);
   tail->id.u = uid;
-  strcpy (tail->name, name);
+  tail->name = pwent ? xstrdup (pwent->pw_name) : NULL;
 
   /* Add to the head of the list, so most recently used is first.  */
   tail->next = user_alist;
@@ -107,8 +104,8 @@ getuidbyname (const char *user)
     }
 #endif
 
-  tail = xmalloc (offsetof (struct userid, name) + strlen (user) + 1);
-  strcpy (tail->name, user);
+  tail = xmalloc (sizeof *tail);
+  tail->name = xstrdup (user);
 
   /* Add to the head of the list, so most recently used is first.  */
   if (pwent)
@@ -135,17 +132,15 @@ getgroup (gid_t gid)
 {
   register struct userid *tail;
   struct group *grent;
-  char const *name;
 
   for (tail = group_alist; tail; tail = tail->next)
     if (tail->id.g == gid)
       return tail->name;
 
   grent = getgrgid (gid);
-  name = grent ? grent->gr_name : NULL;
-  tail = xmalloc (offsetof (struct userid, name) + strlen (name) + 1);
+  tail = xmalloc (sizeof *tail);
   tail->id.g = gid;
-  strcpy (tail->name, name);
+  tail->name = grent ? xstrdup (grent->gr_name) : NULL;
 
   /* Add to the head of the list, so most recently used is first.  */
   tail->next = group_alist;
@@ -185,8 +180,8 @@ getgidbyname (const char *group)
     }
 #endif
 
-  tail = xmalloc (offsetof (struct userid, name) + strlen (group) + 1);
-  strcpy (tail->name, group);
+  tail = xmalloc (sizeof *tail);
+  tail->name = xstrdup (group);
 
   /* Add to the head of the list, so most recently used is first.  */
   if (grent)

modules/idcache

@@ -6,7 +6,6 @@ lib/idcache.c
 m4/idcache.m4
 
 Depends-on:
-flexmember
 xalloc
 
 configure.ac: