/* Copyright (C) 2000 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <errno.h> #include <unistd.h> #include <sysdep.h> #include <sys/syscall.h> #include <linux/posix_types.h> #include "kernel-features.h" extern int __syscall_fchown (int __fd, __kernel_uid_t __owner, __kernel_gid_t __group); #ifdef __NR_fchown32 extern int __syscall_fchown32 (int __fd, __kernel_uid32_t __owner, __kernel_gid32_t __group); # if __ASSUME_32BITUIDS == 0 /* This variable is shared with all files that need to check for 32bit uids. */ extern int __libc_missing_32bit_uids; # endif #endif /* __NR_fchown32 */ int __fchown (int fd, uid_t owner, gid_t group) { #if __ASSUME_32BITUIDS > 0 return INLINE_SYSCALL (fchown32, 3, fd, owner, group); #else # ifdef __NR_fchown32 if (__libc_missing_32bit_uids <= 0) { int result; int saved_errno = errno; result = INLINE_SYSCALL (fchown32, 3, fd, owner, group); if (result == 0 || errno != ENOSYS) return result; __set_errno (saved_errno); __libc_missing_32bit_uids = 1; } # endif /* __NR_fchown32 */ if (((owner + 1) > (uid_t) ((__kernel_uid_t) -1U)) || ((group + 1) > (gid_t) ((__kernel_gid_t) -1U))) { __set_errno (EINVAL); return -1; } return INLINE_SYSCALL (fchown, 3, fd, owner, group); #endif } weak_alias (__fchown, fchown)