/* euidaccess -- check if effective user id can access file
- Copyright (C) 1990, 1991, 1995 Free Software Foundation, Inc.
+ Copyright (C) 1990, 1991, 1995, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
/* 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 errno
extern int errno;
#endif
+#ifndef __set_errno
+# define __set_errno(val) errno = (val)
+#endif
#if defined(EACCES) && !defined(EACCESS)
# define EACCESS EACCES
#ifdef _LIBC
# define group_member __group_member
+# define euidaccess __euidaccess
#else
/* 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;
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;
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)
{
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;
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
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
+\f
+#ifdef TEST
+# include <stdio.h>
+# include <errno.h>
+# include "error.h"
+
+char *program_name;
+
+int
+main (argc, argv)
+ 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