/* 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
-#include <config.h>
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifndef _LIBC
+# include "euidaccess.h"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#ifdef S_IEXEC
-#ifndef S_IXUSR
-#define S_IXUSR S_IEXEC
-#endif
-#ifndef S_IXGRP
-#define S_IXGRP (S_IEXEC >> 3)
-#endif
-#ifndef S_IXOTH
-#define S_IXOTH (S_IEXEC >> 6)
-#endif
+# ifndef S_IXUSR
+# define S_IXUSR S_IEXEC
+# endif
+# ifndef S_IXGRP
+# define S_IXGRP (S_IEXEC >> 3)
+# endif
+# ifndef S_IXOTH
+# define S_IXOTH (S_IEXEC >> 6)
+# endif
#endif /* S_IEXEC */
#if defined (HAVE_UNISTD_H) || defined (_LIBC)
-#include <unistd.h>
+# include <unistd.h>
#endif
#ifdef _POSIX_VERSION
-#include <limits.h>
-#if !defined(NGROUPS_MAX) || NGROUPS_MAX < 1
-#undef NGROUPS_MAX
-#define NGROUPS_MAX sysconf (_SC_NGROUPS_MAX)
-#endif /* NGROUPS_MAX */
+# include <limits.h>
+# if !defined(NGROUPS_MAX) || NGROUPS_MAX < 1
+# undef NGROUPS_MAX
+# define NGROUPS_MAX sysconf (_SC_NGROUPS_MAX)
+# endif /* NGROUPS_MAX */
#else /* not _POSIX_VERSION */
uid_t getuid ();
gid_t getgid ();
uid_t geteuid ();
gid_t getegid ();
-#include <sys/param.h>
-#if !defined(NGROUPS_MAX) && defined(NGROUPS)
-#define NGROUPS_MAX NGROUPS
-#endif /* not NGROUPS_MAX and NGROUPS */
+# include <sys/param.h>
+# if !defined(NGROUPS_MAX) && defined(NGROUPS)
+# define NGROUPS_MAX NGROUPS
+# endif /* not NGROUPS_MAX and NGROUPS */
#endif /* not POSIX_VERSION */
#include <errno.h>
#ifndef errno
extern int errno;
#endif
+#ifndef __set_errno
+# define __set_errno(val) errno = (val)
+#endif
#if defined(EACCES) && !defined(EACCESS)
-#define EACCESS EACCES
+# define EACCESS EACCES
#endif
#ifndef F_OK
-#define F_OK 0
-#define X_OK 1
-#define W_OK 2
-#define R_OK 4
+# define F_OK 0
+# define X_OK 1
+# define W_OK 2
+# define R_OK 4
+#endif
+
+#if !defined (S_IROTH) && defined (R_OK)
+# define S_IROTH R_OK
+#endif
+
+#if !defined (S_IWOTH) && defined (W_OK)
+# define S_IWOTH W_OK
#endif
+#if !defined (S_IXOTH) && defined (X_OK)
+# define S_IXOTH X_OK
+#endif
#ifdef _LIBC
-#define group_member __group_member
+# 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 (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
projects / gnulib.git / blobdiff