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Sync with the GNU C library.

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This commit is contained in:
Jim Meyering
2000-01-07 14:29:26 +00:00
parent b830d441bb
commit 5693e5c586
1 changed files with 63 additions and 14 deletions
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77
lib/euidaccess.c
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@@ -1,5 +1,5 @@
/* euidaccess -- check if effective user id can access file
Copyright (C) 1990, 1991, 1995, 1998 Free Software Foundation, Inc.
Copyright (C) 1990, 1991, 1995, 1998, 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -66,6 +66,9 @@ 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 +96,7 @@ extern int errno;
#ifdef _LIBC
# define group_member __group_member
# define euidaccess __euidaccess
#else
@@ -102,15 +106,6 @@ static uid_t uid;
/* The user's real group id. */
static gid_t gid;
/* The user's effective user id. */
static uid_t euid;
/* The user's effective group id. */
static gid_t egid;
/* Nonzero if UID, GID, EUID, and EGID have valid values. */
static int have_ids = 0;
# if HAVE_GETGROUPS
int group_member ();
# else
@@ -119,6 +114,15 @@ int group_member ();
#endif
/* The user's effective user id. */
static uid_t euid;
/* The user's effective group id. */
static gid_t egid;
/* Nonzero if UID, GID, EUID, and EGID have valid values. */
static int have_ids;
/* Return 0 if the user has permission of type MODE on file PATH;
otherwise, return -1 and set `errno' to EACCESS.
@@ -133,8 +137,9 @@ euidaccess (const char *path, int mode)
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)
{
@@ -144,11 +149,11 @@ euidaccess (const char *path, int 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;
@@ -161,6 +166,16 @@ euidaccess (const char *path, int 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
@@ -175,6 +190,40 @@ euidaccess (const char *path, int 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 (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