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/* Wrapper arpund system calls to provide cancelation 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,

   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

   Boston, MA 02111-1307, USA.  */

#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/resource.h>

#include <sys/wait.h>

#include <sys/socket.h>

#include "libc-symbols.h"

#ifndef SHARED

/* We need a hook to force this file to be linked in when static

   libpthread is used.  */

const int __pthread_provide_wrappers = 0;

#endif

#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2

#define ELIX_2_PLUS

#endif

#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3

#define ELIX_3_PLUS

#endif

#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))

strong_alias (close, __close)

/* fcntl(2).  */

CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...),

                       (fd, cmd, va_arg (ap, long int)), cmd)

strong_alias (fcntl, __fcntl)

/* 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))

strong_alias (lseek, __lseek)

#ifdef ELIX_2_PLUS

/* lseek64(2).  */

CANCELABLE_SYSCALL (loff_t, lseek64, (int fd, loff_t offset, int whence),

                    (fd, offset, whence))

#endif

/* msync(2).  */

CANCELABLE_SYSCALL (int, msync, (__ptr_t addr, size_t length, int flags),

                    (addr, length, flags))

/* nanosleep(2).  */

CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time,

                                     struct timespec *remaining),

                    (requested_time, remaining))

/* open(2).  */

CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...),

                       (pathname, flags, va_arg (ap, int)), flags)

strong_alias (open, __open)

#ifdef ELIX_2_PLUS

/* open64(3).  */

CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),

                       (pathname, flags, va_arg (ap, int)), flags)

strong_alias (open64, __open64)

#endif

/* pause(2).  */

CANCELABLE_SYSCALL (int, pause, (void), ())

/* pread(3).  */

CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count,

                                     off_t offset),

                    (fd, buf, count, offset))

#ifdef ELIX_2_PLUS

/* pread64(3).  */

CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,

                                       loff_t offset),

                    (fd, buf, count, offset))

strong_alias (pread64, __pread64)

#endif

/* pwrite(3).  */

CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,

                                      off_t offset),

                    (fd, buf, n, offset))

#ifdef ELIX_2_PLUS

/* pwrite64(3).  */

CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,

                                        loff_t offset),

                    (fd, buf, n, offset))

strong_alias (pwrite64, __pwrite64)

#endif

/* read(2).  */

CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),

                    (fd, buf, count))

strong_alias (read, __read)

#ifdef ELIX_3_PLUS

/* system(3).  */

CANCELABLE_SYSCALL (int, system, (const char *line), (line))

#endif

/* tcdrain(2).  */

CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd))

#ifdef ELIX_3_PLUS

/* wait(2).  */

CANCELABLE_SYSCALL (__pid_t, wait, (int *stat_loc), (stat_loc))

strong_alias (wait, __wait)

#endif

#ifdef ELIX_3_PLUS

/* waitpid(2).  */

CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc,

                                       int options),

                    (pid, stat_loc, options))

#endif

/* for libpthread usage */

CANCELABLE_SYSCALL (__pid_t, __waitpid, (__pid_t pid, int *stat_loc,

                                       int options),

                    (pid, stat_loc, options))

/* write(2).  */

CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n),

                    (fd, buf, n))

strong_alias (write, __write)

/* 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))

/* connect(2).  */

CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,

                                     socklen_t len),

                    (fd, addr, len))

strong_alias (connect, __connect)

/* 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))

strong_alias (send, __send)

/* 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))