487 lines
11 KiB
C
487 lines
11 KiB
C
/*
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* Copyright (c) 2000 Jason Evans <jasone@freebsd.org>.
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* Copyright (c) 2002 Daniel M. Eischen <deischen@freebsd.org>
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* Copyright (c) 2003 Jeff Roberson <jeff@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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#include <sys/fcntl.h>
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#include <sys/mman.h>
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#include <sys/param.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/uio.h>
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#include <sys/wait.h>
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#include <aio.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "thr_private.h"
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extern int __creat(const char *, mode_t);
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extern int __sleep(unsigned int);
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extern int __sys_nanosleep(const struct timespec *, struct timespec *);
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extern int __sys_select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
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extern int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
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extern int __system(const char *);
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extern int __tcdrain(int);
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extern pid_t __wait(int *);
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extern pid_t __sys_wait4(pid_t, int *, int, struct rusage *);
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extern pid_t __waitpid(pid_t, int *, int);
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__weak_reference(_aio_suspend, aio_suspend);
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int
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_aio_suspend(const struct aiocb * const iocbs[], int niocb, const struct
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timespec *timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_aio_suspend(iocbs, niocb, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_close, close);
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int
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_close(int fd)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_close(fd);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_creat, creat);
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int
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_creat(const char *path, mode_t mode)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __creat(path, mode);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_fcntl, fcntl);
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int
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_fcntl(int fd, int cmd,...)
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{
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int ret;
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va_list ap;
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_thread_enter_cancellation_point();
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va_start(ap, cmd);
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switch (cmd) {
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case F_DUPFD:
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case F_SETFD:
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case F_SETFL:
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ret = __sys_fcntl(fd, cmd, va_arg(ap, int));
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break;
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case F_GETFD:
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case F_GETFL:
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ret = __sys_fcntl(fd, cmd);
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break;
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default:
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ret = __sys_fcntl(fd, cmd, va_arg(ap, void *));
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}
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va_end(ap);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_fsync, fsync);
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int
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_fsync(int fd)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_fsync(fd);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_msync, msync);
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int
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_msync(void *addr, size_t len, int flags)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_msync(addr, len, flags);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_nanosleep, nanosleep);
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int
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_nanosleep(const struct timespec * time_to_sleep, struct timespec *
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time_remaining)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_nanosleep(time_to_sleep, time_remaining);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_open, open);
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int
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_open(const char *path, int flags,...)
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{
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int ret;
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int mode = 0;
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va_list ap;
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_thread_enter_cancellation_point();
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/* Check if the file is being created: */
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if (flags & O_CREAT) {
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/* Get the creation mode: */
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va_start(ap, flags);
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mode = va_arg(ap, int);
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va_end(ap);
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}
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ret = __sys_open(path, flags, mode);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_poll, poll);
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int
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_poll(struct pollfd *fds, unsigned int nfds, int timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_poll(fds, nfds, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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extern int __pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask);
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int
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pselect(int count, fd_set *rfds, fd_set *wfds, fd_set *efds,
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const struct timespec *timo, const sigset_t *mask)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __pselect(count, rfds, wfds, efds, timo, mask);
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_thread_leave_cancellation_point();
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return (ret);
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}
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__weak_reference(_read, read);
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ssize_t
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_read(int fd, void *buf, size_t nbytes)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_read(fd, buf, nbytes);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_readv, readv);
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ssize_t
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_readv(int fd, const struct iovec *iov, int iovcnt)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_readv(fd, iov, iovcnt);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_select, select);
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int
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_select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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struct timeval *timeout)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_sigaction, sigaction);
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int
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_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
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{
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struct sigaction *tmpact;
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struct sigaction oldact, wrapperact;
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int error;
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/* Detect invalid signals. Signal SIGTHR is silently ignored */
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if (sig < 1 || sig > NSIG) {
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errno = EINVAL;
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return (-1);
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}
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if (sig == SIGTHR)
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return (0);
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/*
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* If act is not NULL the library's signal wrapper is passed into the
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* kernel only if the action is not SIG_DFL or SIG_IGN.
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* On the other hand if act is NULL the caller only wants
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* the old value so there is no need to call into the kernel.
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*/
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error = 0;
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tmpact = NULL;
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proc_sigact_copyout(sig, &oldact);
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if (act != NULL) {
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proc_sigact_copyin(sig, act);
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tmpact = proc_sigact_sigaction(sig);
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if (tmpact->sa_handler != SIG_DFL &&
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tmpact->sa_handler != SIG_IGN) {
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bcopy((const void *)tmpact, (void *)&wrapperact,
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sizeof(struct sigaction));
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tmpact->sa_flags &= SA_SIGINFO;
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wrapperact.sa_sigaction = &_thread_sig_wrapper;
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tmpact = &wrapperact;
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}
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error = __sys_sigaction(sig, tmpact, NULL);
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}
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if (error == 0) {
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/* If successful, return the old sigaction to the user */
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if (oact != NULL )
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bcopy((const void *)&oldact, (void *)oact,
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sizeof(struct sigaction));
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} else {
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/*
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* The only time error is non-zero is if the syscall failed,
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* which means the sigaction in the process global list
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* was altered before the syscall. Return it to it's old value.
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*/
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proc_sigact_copyin(sig, &oldact);
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}
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return (error);
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}
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__weak_reference(_sleep, sleep);
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unsigned int
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_sleep(unsigned int seconds)
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{
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unsigned int ret;
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_thread_enter_cancellation_point();
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ret = __sleep(seconds);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_system, system);
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int
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_system(const char *string)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __system(string);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_tcdrain, tcdrain);
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int
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_tcdrain(int fd)
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{
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int ret;
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_thread_enter_cancellation_point();
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ret = __tcdrain(fd);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_wait, wait);
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pid_t
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_wait(int *istat)
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{
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pid_t ret;
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_thread_enter_cancellation_point();
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ret = __wait(istat);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_wait4, wait4);
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pid_t
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_wait4(pid_t pid, int *istat, int options, struct rusage *rusage)
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{
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pid_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_wait4(pid, istat, options, rusage);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_waitpid, waitpid);
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pid_t
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_waitpid(pid_t wpid, int *status, int options)
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{
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pid_t ret;
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_thread_enter_cancellation_point();
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ret = __waitpid(wpid, status, options);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_write, write);
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ssize_t
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_write(int fd, const void *buf, size_t nbytes)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_write(fd, buf, nbytes);
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_thread_leave_cancellation_point();
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return ret;
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}
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__weak_reference(_writev, writev);
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ssize_t
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_writev(int fd, const struct iovec *iov, int iovcnt)
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{
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ssize_t ret;
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_thread_enter_cancellation_point();
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ret = __sys_writev(fd, iov, iovcnt);
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_thread_leave_cancellation_point();
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return ret;
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}
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