diff options
Diffstat (limited to 'sysdeps/posix/euidaccess.c')
| -rw-r--r-- | sysdeps/posix/euidaccess.c | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/sysdeps/posix/euidaccess.c b/sysdeps/posix/euidaccess.c deleted file mode 100644 index 0c6f4d0c54..0000000000 --- a/sysdeps/posix/euidaccess.c +++ /dev/null @@ -1,215 +0,0 @@ -/* Check if effective user id can access file - Copyright (C) 1990-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* Written by David MacKenzie and Torbjorn Granlund. - Adapted for GNU C library by Roland McGrath. */ - -#ifdef HAVE_CONFIG_H -# include <config.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 -#endif /* S_IEXEC */ - -#if defined HAVE_UNISTD_H || defined _LIBC -# include <unistd.h> -#endif - -#ifndef _POSIX_VERSION -uid_t getuid (); -gid_t getgid (); -uid_t geteuid (); -gid_t getegid (); -#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 -#endif - -#ifndef F_OK -# 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 euidaccess __euidaccess - -#else - -/* The user's real user id. */ -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; - -# ifdef HAVE_GETGROUPS -int group_member (); -# else -# define group_member(gid) 0 -# endif - -#endif - - -/* Return 0 if the user has permission of type MODE on file PATH; - otherwise, return -1 and set `errno' to EACCESS. - Like access, except that it uses the effective user and group - id's instead of the real ones, and it does not check for read-only - filesystem, text busy, etc. */ - -int -euidaccess (const char *path, int mode) -{ - struct stat64 stats; - int granted; - -#ifdef _LIBC - uid_t euid; - gid_t egid; -#else - if (have_ids == 0) - { - have_ids = 1; - uid = getuid (); - gid = getgid (); - euid = geteuid (); - egid = getegid (); - } - - if (uid == euid && gid == egid) - /* If we are not set-uid or set-gid, access does the same. */ - return access (path, mode); -#endif - - if (stat64 (path, &stats)) - return -1; - - mode &= (X_OK | W_OK | R_OK); /* Clear any bogus bits. */ -#if R_OK != S_IROTH || W_OK != S_IWOTH || X_OK != S_IXOTH - ?error Oops, portability assumptions incorrect. -#endif - - if (mode == F_OK) - return 0; /* The file exists. */ - -#ifdef _LIBC - /* Now we need the IDs. */ - euid = __geteuid (); - egid = __getegid (); - - if (__getuid () == euid && __getgid () == egid) - /* If we are not set-uid or set-gid, access does the same. */ - return __access (path, mode); -#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 - || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))) - return 0; - - if (euid == stats.st_uid) - granted = (unsigned int) (stats.st_mode & (mode << 6)) >> 6; - else if (egid == stats.st_gid || group_member (stats.st_gid)) - granted = (unsigned int) (stats.st_mode & (mode << 3)) >> 3; - else - granted = (stats.st_mode & mode); - /* XXX Add support for ACLs. */ - if (granted == mode) - return 0; - __set_errno (EACCESS); - return -1; -} -#undef euidaccess -#undef eaccess -#ifdef weak_alias -weak_alias (__euidaccess, euidaccess) -weak_alias (__euidaccess, eaccess) -#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 |