diff options
Diffstat (limited to 'lib/libpthread/uthread/uthread_lseek.c')
| -rw-r--r-- | lib/libpthread/uthread/uthread_lseek.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/libpthread/uthread/uthread_lseek.c b/lib/libpthread/uthread/uthread_lseek.c new file mode 100644 index 00000000000..152d707938b --- /dev/null +++ b/lib/libpthread/uthread/uthread_lseek.c @@ -0,0 +1,56 @@ +/* $OpenBSD: uthread_lseek.c,v 1.1 2007/06/05 18:11:49 kurt Exp $ */ +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <unistd.h> +#include <sys/syscall.h> +#ifdef _THREAD_SAFE +#include <pthread.h> +#include "pthread_private.h" + +off_t __syscall(quad_t, ...); + +/* + * This function provides 64-bit offset padding that + * is not supplied by GCC 1.X but is supplied by GCC 2.X. + */ +off_t +lseek(int fd, off_t offset, int whence) +{ + off_t retval; + + if (_FD_LOCK(fd, FD_RDWR, NULL) != 0) { + retval = -1; + } else { + retval = __syscall((quad_t)SYS_lseek, fd, 0, offset, whence); + _FD_UNLOCK(fd, FD_RDWR); + } + return retval; +} +#endif |