/* 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