/* 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. */ #define __FORCE_GLIBC #include <features.h> #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 <sys/syscall.h> #ifndef __PIC__ /* We need a hook to force this file to be linked in when static libpthread is used. */ const int __pthread_provide_wrappers = 0; #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)) /* fcntl(2). */ CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...), (fd, cmd, va_arg (ap, long int)), cmd) /* 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)) #ifdef __UCLIBC_HAS_LFS__ /* lseek64(2). */ CANCELABLE_SYSCALL (off64_t, lseek64, (int fd, off64_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, mode_t)), flags) #ifdef __UCLIBC_HAS_LFS__ /* open64(3). */ CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...), (pathname, flags, va_arg (ap, mode_t)), flags) #endif /* 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 __UCLIBC_HAS_LFS__ && 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 __UCLIBC_HAS_LFS__ && 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). */ 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)) /* 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)) /* 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))