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/* Wrapper around system calls to provide cancellation points.
Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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,
see <http://www.gnu.org/licenses/>. */
#include <fcntl.h>
#include <sys/mman.h>
#include <pthread.h>
#include <unistd.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdlib.h>
#include <termios.h>
#include <sys/epoll.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#ifndef __PIC__
/* We need a hook to force this file to be linked in when static
libpthread is used. */
const char __pthread_provide_wrappers = 0;
#endif
/* Using private interface to libc (__libc_foo) to implement
* cancellable versions of some libc functions */
#define CANCELABLE_SYSCALL(res_type, name, param_list, params) \
res_type __libc_##name param_list; \
res_type \
__attribute__ ((weak)) \
name param_list \
{ \
res_type result; \
int oldtype; \
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
result = __libc_##name params; \
pthread_setcanceltype (oldtype, NULL); \
return result; \
}
#define CANCELABLE_SYSCALL_VA(res_type, name, param_list, params, last_arg) \
res_type __libc_##name param_list; \
res_type \
__attribute__ ((weak)) \
name param_list \
{ \
res_type result; \
int oldtype; \
va_list ap; \
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
va_start (ap, last_arg); \
result = __libc_##name params; \
va_end (ap); \
pthread_setcanceltype (oldtype, NULL); \
return result; \
}
/* close(2). */
CANCELABLE_SYSCALL (int, close, (int fd), (fd))
/* fcntl(2). */
CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...),
(fd, cmd, va_arg (ap, long int)), cmd)
#if __WORDSIZE == 32
/* fcntl64(2). */
CANCELABLE_SYSCALL_VA (int, fcntl64, (int fd, int cmd, ...),
(fd, cmd, va_arg (ap, long int)), cmd)
#endif
/* fsync(2). */
CANCELABLE_SYSCALL (int, fsync, (int fd), (fd))
/* lseek(2). */
CANCELABLE_SYSCALL (off_t, lseek, (int fd, off_t offset, int whence),
(fd, offset, whence))
/* lseek64(2). */
CANCELABLE_SYSCALL (off64_t, lseek64, (int fd, off64_t offset, int whence),
(fd, offset, whence))
#if defined(__NR_msync) && defined(__ARCH_USE_MMU__)
/* msync(2). */
CANCELABLE_SYSCALL (int, msync, (void *addr, size_t length, int flags),
(addr, length, flags))
#endif
/* nanosleep(2). */
libpthread_hidden_proto(nanosleep)
CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time,
struct timespec *remaining),
(requested_time, remaining))
libpthread_hidden_def(nanosleep)
/* open(2). */
CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...),
(pathname, flags, va_arg (ap, mode_t)), flags)
/* open64(3). */
CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),
(pathname, flags, va_arg (ap, mode_t)), flags)
/* pause(2). */
CANCELABLE_SYSCALL (int, pause, (void), ())
/* Enable this if enabling these in syscalls.c */
/* pread(3). */
CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count,
off_t offset),
(fd, buf, count, offset))
#if defined __NR_pread64
/* pread64(3). */
CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,
off64_t offset),
(fd, buf, count, offset))
#endif
/* pwrite(3). */
CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,
off_t offset),
(fd, buf, n, offset))
#if defined __NR_pwrited64
/* pwrite64(3). */
CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,
off64_t offset),
(fd, buf, n, offset))
#endif
/* read(2). */
CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),
(fd, buf, count))
/* system(3). */
CANCELABLE_SYSCALL (int, system, (const char *line), (line))
/* tcdrain(2). */
CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd))
/* wait(2). */
CANCELABLE_SYSCALL (__pid_t, wait, (__WAIT_STATUS_DEFN stat_loc), (stat_loc))
/* waitpid(2). */
libpthread_hidden_proto(waitpid)
CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc,
int options),
(pid, stat_loc, options))
libpthread_hidden_def(waitpid)
/* write(2). */
CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n),
(fd, buf, n))
#if defined __UCLIBC_HAS_SOCKET__
/* The following system calls are thread cancellation points specified
in XNS. */
/* accept(2). */
CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr,
socklen_t *addr_len),
(fd, addr, addr_len))
#if defined __UCLIBC_LINUX_SPECIFIC__
/* accept4(2). */
CANCELABLE_SYSCALL (int, accept4, (int fd, __SOCKADDR_ARG addr,
socklen_t *addr_len, int flags),
(fd, addr, addr_len, flags))
#endif
/* connect(2). */
CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,
socklen_t len),
(fd, addr, len))
/* recv(2). */
CANCELABLE_SYSCALL (ssize_t, recv, (int fd, __ptr_t buf, size_t n, int flags),
(fd, buf, n, flags))
/* recvfrom(2). */
CANCELABLE_SYSCALL (ssize_t, recvfrom, (int fd, __ptr_t buf, size_t n, int flags,
__SOCKADDR_ARG addr, socklen_t *addr_len),
(fd, buf, n, flags, addr, addr_len))
/* recvmsg(2). */
CANCELABLE_SYSCALL (ssize_t, recvmsg, (int fd, struct msghdr *message, int flags),
(fd, message, flags))
/* send(2). */
CANCELABLE_SYSCALL (ssize_t, send, (int fd, const __ptr_t buf, size_t n,
int flags),
(fd, buf, n, flags))
/* sendmsg(2). */
CANCELABLE_SYSCALL (ssize_t, sendmsg, (int fd, const struct msghdr *message,
int flags),
(fd, message, flags))
/* sendto(2). */
CANCELABLE_SYSCALL (ssize_t, sendto, (int fd, const __ptr_t buf, size_t n,
int flags, __CONST_SOCKADDR_ARG addr,
socklen_t addr_len),
(fd, buf, n, flags, addr, addr_len))
#endif /* __UCLIBC_HAS_SOCKET__ */
#ifdef __UCLIBC_HAS_EPOLL__
# include <sys/epoll.h>
# ifdef __NR_epoll_wait
CANCELABLE_SYSCALL (int, epoll_wait, (int epfd, struct epoll_event *events, int maxevents, int timeout),
(epfd, events, maxevents, timeout))
# endif
# ifdef __NR_epoll_pwait
CANCELABLE_SYSCALL (int, epoll_pwait, (int epfd, struct epoll_event *events, int maxevents, int timeout,
const sigset_t *set),
(epfd, events, maxevents, timeout, set))
# endif
#endif
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