252 lines
6.9 KiB
C
252 lines
6.9 KiB
C
/* Wrapper arpund system calls to provide cancelation points.
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Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <pthread.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <sys/resource.h>
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#include <sys/wait.h>
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#include <sys/socket.h>
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#include "libc-symbols.h"
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#ifndef SHARED
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/* We need a hook to force this file to be linked in when static
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libpthread is used. */
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const int __pthread_provide_wrappers = 0;
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#endif
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#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
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#define ELIX_2_PLUS
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#endif
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#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3
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#define ELIX_3_PLUS
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#endif
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#define CANCELABLE_SYSCALL(res_type, name, param_list, params) \
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res_type __libc_##name param_list; \
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res_type \
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__attribute__ ((weak)) \
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name param_list \
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{ \
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res_type result; \
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int oldtype; \
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pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
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result = __libc_##name params; \
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pthread_setcanceltype (oldtype, NULL); \
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return result; \
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}
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#define CANCELABLE_SYSCALL_VA(res_type, name, param_list, params, last_arg) \
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res_type __libc_##name param_list; \
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res_type \
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__attribute__ ((weak)) \
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name param_list \
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{ \
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res_type result; \
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int oldtype; \
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va_list ap; \
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pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
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va_start (ap, last_arg); \
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result = __libc_##name params; \
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va_end (ap); \
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pthread_setcanceltype (oldtype, NULL); \
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return result; \
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}
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/* close(2). */
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CANCELABLE_SYSCALL (int, close, (int fd), (fd))
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strong_alias (close, __close)
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/* fcntl(2). */
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CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...),
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(fd, cmd, va_arg (ap, long int)), cmd)
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strong_alias (fcntl, __fcntl)
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/* fsync(2). */
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CANCELABLE_SYSCALL (int, fsync, (int fd), (fd))
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/* lseek(2). */
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CANCELABLE_SYSCALL (off_t, lseek, (int fd, off_t offset, int whence),
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(fd, offset, whence))
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strong_alias (lseek, __lseek)
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#ifdef ELIX_2_PLUS
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/* lseek64(2). */
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CANCELABLE_SYSCALL (loff_t, lseek64, (int fd, loff_t offset, int whence),
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(fd, offset, whence))
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#endif
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/* msync(2). */
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CANCELABLE_SYSCALL (int, msync, (__ptr_t addr, size_t length, int flags),
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(addr, length, flags))
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/* nanosleep(2). */
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CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time,
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struct timespec *remaining),
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(requested_time, remaining))
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/* open(2). */
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CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...),
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(pathname, flags, va_arg (ap, int)), flags)
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strong_alias (open, __open)
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#ifdef ELIX_2_PLUS
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/* open64(3). */
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CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),
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(pathname, flags, va_arg (ap, int)), flags)
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strong_alias (open64, __open64)
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#endif
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/* pause(2). */
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CANCELABLE_SYSCALL (int, pause, (void), ())
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/* pread(3). */
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CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count,
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off_t offset),
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(fd, buf, count, offset))
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#ifdef ELIX_2_PLUS
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/* pread64(3). */
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CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,
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loff_t offset),
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(fd, buf, count, offset))
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strong_alias (pread64, __pread64)
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#endif
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/* pwrite(3). */
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CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,
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off_t offset),
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(fd, buf, n, offset))
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#ifdef ELIX_2_PLUS
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/* pwrite64(3). */
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CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,
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loff_t offset),
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(fd, buf, n, offset))
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strong_alias (pwrite64, __pwrite64)
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#endif
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/* read(2). */
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CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),
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(fd, buf, count))
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strong_alias (read, __read)
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#ifdef ELIX_3_PLUS
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/* system(3). */
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CANCELABLE_SYSCALL (int, system, (const char *line), (line))
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#endif
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/* tcdrain(2). */
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CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd))
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#ifdef ELIX_3_PLUS
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/* wait(2). */
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CANCELABLE_SYSCALL (__pid_t, wait, (int *stat_loc), (stat_loc))
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strong_alias (wait, __wait)
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#endif
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#ifdef ELIX_3_PLUS
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/* waitpid(2). */
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CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc,
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int options),
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(pid, stat_loc, options))
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#endif
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/* for libpthread usage */
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CANCELABLE_SYSCALL (__pid_t, __waitpid, (__pid_t pid, int *stat_loc,
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int options),
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(pid, stat_loc, options))
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/* write(2). */
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CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n),
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(fd, buf, n))
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strong_alias (write, __write)
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/* The following system calls are thread cancellation points specified
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in XNS. */
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/* accept(2). */
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CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr,
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socklen_t *addr_len),
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(fd, addr, addr_len))
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/* connect(2). */
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CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,
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socklen_t len),
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(fd, addr, len))
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strong_alias (connect, __connect)
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/* recv(2). */
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CANCELABLE_SYSCALL (ssize_t, recv, (int fd, __ptr_t buf, size_t n, int flags),
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(fd, buf, n, flags))
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/* recvfrom(2). */
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CANCELABLE_SYSCALL (ssize_t, recvfrom, (int fd, __ptr_t buf, size_t n, int flags,
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__SOCKADDR_ARG addr, socklen_t *addr_len),
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(fd, buf, n, flags, addr, addr_len))
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/* recvmsg(2). */
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CANCELABLE_SYSCALL (ssize_t, recvmsg, (int fd, struct msghdr *message, int flags),
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(fd, message, flags))
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/* send(2). */
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CANCELABLE_SYSCALL (ssize_t, send, (int fd, const __ptr_t buf, size_t n,
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int flags),
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(fd, buf, n, flags))
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strong_alias (send, __send)
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/* sendmsg(2). */
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CANCELABLE_SYSCALL (ssize_t, sendmsg, (int fd, const struct msghdr *message,
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int flags),
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(fd, message, flags))
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/* sendto(2). */
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CANCELABLE_SYSCALL (ssize_t, sendto, (int fd, const __ptr_t buf, size_t n,
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int flags, __CONST_SOCKADDR_ARG addr,
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socklen_t addr_len),
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(fd, buf, n, flags, addr, addr_len))
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