X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Feuidaccess.c;h=772cf6f1fb1b9d8001743246241be5874050372b;hb=11a85c350e8b872d617843487e1c77ea157880be;hp=e2b19c4c9a309e8bf9d87d6fb78ba17f6a0c8911;hpb=af46584e6a90f542ea5255b4771a7497ff66931a;p=gnulib.git

diff --git a/lib/euidaccess.c b/lib/euidaccess.c
index e2b19c4c9..772cf6f1f 100644
--- a/lib/euidaccess.c
+++ b/lib/euidaccess.c
@@ -1,30 +1,35 @@
 /* euidaccess -- check if effective user id can access file
-   Copyright (C) 1990, 1991, 1995 Free Software Foundation, Inc.
 
-This file is part of the GNU C Library.
+   Copyright (C) 1990, 1991, 1995, 1998, 2000, 2003 Free Software
+   Foundation, Inc.
 
-The GNU C Library is free software; you can redistribute it and/or
-modify it under the terms of the GNU Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+   This file is part of the GNU C Library.
 
-The GNU C Library is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-Library General Public License for more details.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
 
-You should have received a copy of the GNU Library General Public
-License along with the GNU C Library; see the file COPYING.LIB.  If
-not, write to the Free Software Foundation, Inc., 675 Mass Ave,
-Cambridge, MA 02139, USA.  */
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 /* Written by David MacKenzie and Torbjorn Granlund.
    Adapted for GNU C library by Roland McGrath.  */
 
-#ifdef HAVE_CONFIG_H
+#if HAVE_CONFIG_H
 # include <config.h>
 #endif
 
+#ifndef _LIBC
+# include "euidaccess.h"
+#endif
+
 #include <sys/types.h>
 #include <sys/stat.h>
 
@@ -66,6 +71,9 @@ gid_t getegid ();
 #ifndef errno
 extern int errno;
 #endif
+#ifndef __set_errno
+# define __set_errno(val) errno = (val)
+#endif
 
 #if defined(EACCES) && !defined(EACCESS)
 # define EACCESS EACCES
@@ -93,6 +101,7 @@ extern int errno;
 #ifdef _LIBC
 
 # define group_member __group_member
+# define euidaccess __euidaccess
 
 #else
 
@@ -102,6 +111,14 @@ static uid_t uid;
 /* The user's real group id. */
 static gid_t gid;
 
+# if HAVE_GETGROUPS
+int group_member ();
+# else
+#  define group_member(gid)	0
+# endif
+
+#endif
+
 /* The user's effective user id. */
 static uid_t euid;
 
@@ -109,15 +126,7 @@ static uid_t euid;
 static gid_t egid;
 
 /* Nonzero if UID, GID, EUID, and EGID have valid values. */
-static int have_ids = 0;
-
-# ifdef HAVE_GETGROUPS
-int group_member ();
-# else
-#  define group_member(gid)	0
-# endif
-
-#endif
+static int have_ids;
 
 
 /* Return 0 if the user has permission of type MODE on file PATH;
@@ -127,16 +136,15 @@ int group_member ();
    filesystem, text busy, etc. */
 
 int
-euidaccess (path, mode)
-     const char *path;
-     int mode;
+euidaccess (const char *path, int mode)
 {
   struct stat stats;
   int granted;
 
 #ifdef	_LIBC
-  uid_t uid = getuid (), euid = geteuid ();
-  gid_t gid = getgid (), egid = getegid ();
+  if (! __libc_enable_secure)
+    /* If we are not set-uid or set-gid, access does the same.  */
+    return __access (path, mode);
 #else
   if (have_ids == 0)
     {
@@ -146,11 +154,11 @@ euidaccess (path, mode)
       euid = geteuid ();
       egid = getegid ();
     }
-#endif
 
   if (uid == euid && gid == egid)
     /* If we are not set-uid or set-gid, access does the same.  */
     return access (path, mode);
+#endif
 
   if (stat (path, &stats))
     return -1;
@@ -163,6 +171,16 @@ euidaccess (path, mode)
   if (mode == F_OK)
     return 0;			/* The file exists. */
 
+#ifdef	_LIBC
+  /* Now we need the IDs.  */
+  if (have_ids == 0)
+    {
+      have_ids = 1;
+      euid = __geteuid ();
+      egid = __getegid ();
+    }
+#endif
+
   /* The super-user can read and write any file, and execute any file
      that anyone can execute. */
   if (euid == 0 && ((mode & X_OK) == 0
@@ -177,6 +195,38 @@ euidaccess (path, mode)
     granted = (stats.st_mode & mode);
   if (granted == mode)
     return 0;
-  errno = EACCESS;
+  __set_errno (EACCESS);
   return -1;
 }
+#undef euidaccess
+#ifdef weak_alias
+weak_alias (__euidaccess, euidaccess)
+#endif
+
+#ifdef TEST
+# include <stdio.h>
+# include <errno.h>
+# include "error.h"
+
+char *program_name;
+
+int
+main (int argc, char **argv)
+{
+  char *file;
+  int mode;
+  int err;
+
+  program_name = argv[0];
+  if (argc < 3)
+    abort ();
+  file = argv[1];
+  mode = atoi (argv[2]);
+
+  err = euidaccess (file, mode);
+  printf ("%d\n", err);
+  if (err != 0)
+    error (0, errno, "%s", file);
+  exit (0);
+}
+#endif