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41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
136 lines
3.5 KiB
C
136 lines
3.5 KiB
C
/* Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <sysdep.h>
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#include <sys/syscall.h>
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#include "../kernel-features.h"
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extern int __syscall_fcntl (int __fd, int __cmd, ...);
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#ifdef __NR_fcntl64
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extern int __syscall_fcntl64 (int __fd, int __cmd, ...);
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#endif
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#if __ASSUME_FCNTL64 == 0
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/* This variable is shared with all files that check for fcntl64. */
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int __have_no_fcntl64;
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#endif
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int
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__libc_fcntl (int fd, int cmd, ...)
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{
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va_list ap;
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void *arg;
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va_start (ap, cmd);
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arg = va_arg (ap, void *);
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va_end (ap);
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#if __ASSUME_FCNTL64 > 0
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return INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
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#else
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# ifdef __NR_fcntl64
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if (! __have_no_fcntl64)
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{
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int result = INLINE_SYSCALL (fcntl64, 3, fd, cmd, arg);
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if (result >= 0 || errno != ENOSYS)
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return result;
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__have_no_fcntl64 = 1;
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}
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# endif
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switch (cmd)
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{
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case F_GETLK64:
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/* Convert arg from flock64 to flock and back. */
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{
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struct flock fl;
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struct flock64 *fl64 = arg;
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int res;
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fl.l_start = (off_t)fl64->l_start;
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/* Check if we can represent the values with the smaller type. */
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if ((off64_t) fl.l_start != fl64->l_start)
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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fl.l_len = (off_t) fl64->l_len;
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/* Check if we can represent the values with the smaller type. */
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if ((off64_t) fl.l_len != fl64->l_len)
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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fl.l_type = fl64->l_type;
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fl.l_whence = fl64->l_whence;
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fl.l_pid = fl64->l_pid;
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res = INLINE_SYSCALL (fcntl, 3, fd, F_GETLK, &fl);
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if (res != 0)
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return res;
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/* Everything ok, convert back. */
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fl64->l_type = fl.l_type;
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fl64->l_whence = fl.l_whence;
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fl64->l_start = fl.l_start;
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fl64->l_len = fl.l_len;
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fl64->l_pid = fl.l_pid;
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return 0;
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}
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case F_SETLK64:
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case F_SETLKW64:
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/* Try to convert arg from flock64 to flock. */
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{
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struct flock fl;
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struct flock64 *fl64 = arg;
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fl.l_start = (off_t) fl64->l_start;
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/* Check if we can represent the values with the smaller type. */
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if ((off64_t) fl.l_start != fl64->l_start)
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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fl.l_len = (off_t)fl64->l_len;
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/* Check if we can represent the values with the smaller type. */
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if ((off64_t) fl.l_len != fl64->l_len)
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{
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__set_errno (EOVERFLOW);
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return -1;
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}
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fl.l_type = fl64->l_type;
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fl.l_whence = fl64->l_whence;
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fl.l_pid = fl64->l_pid;
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assert (F_SETLK - F_SETLKW == F_SETLK64 - F_SETLKW64);
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return INLINE_SYSCALL (fcntl, 3, fd, cmd + F_SETLK - F_SETLK64, &fl);
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}
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default:
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return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
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}
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return -1;
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#endif /* __ASSUME_FCNTL64 */
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}
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weak_alias (__libc_fcntl, __fcntl)
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weak_alias (__libc_fcntl, fcntl)
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