| /* 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)) |