[thirdparty/glibc.git] / linuxthreads / wrapsyscall.c

/* 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>


#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


#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)


/* lseek64(2).  */
CANCELABLE_SYSCALL (off64_t, lseek64, (int fd, off64_t offset, int whence),
		    (fd, offset, whence))


/* 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)
strong_alias (open, __open)


/* open64(3).  */
CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),
		       (pathname, flags, va_arg (ap, mode_t)), flags)
strong_alias (open64, __open64)


/* 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))


/* pread64(3).  */
CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,
				       off64_t offset),
		    (fd, buf, count, offset))
strong_alias (pread64, __pread64)


/* pwrite(3).  */
CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,
				      off_t offset),
		    (fd, buf, n, offset))


/* pwrite64(3).  */
CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,
					off64_t offset),
		    (fd, buf, n, offset))
strong_alias (pwrite64, __pwrite64)


/* read(2).  */
CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),
		    (fd, buf, count))
strong_alias (read, __read)


/* 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))
strong_alias (wait, __wait)


/* 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))
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, (ssize_t 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, (ssize_t 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))
Commit	Line	Data
5afdca00	1	/* Wrapper arpund system calls to provide cancelation points.
c2063191	2	Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc.
5afdca00 UD	3	This file is part of the GNU C Library.
	4	Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Library General Public License as
	8	published by the Free Software Foundation; either version 2 of the
	9	License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Library General Public License for more details.
	15
	16	You should have received a copy of the GNU Library General Public
	17	License along with the GNU C Library; see the file COPYING.LIB. If not,
	18	write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	#include <fcntl.h>
628a0aa1	22	#include <sys/mman.h>
5afdca00 UD	23	#include <pthread.h>
	24	#include <unistd.h>
	25	#include <stdarg.h>
	26	#include <stddef.h>
628a0aa1 UD	27	#include <stdlib.h>
628a0aa1 UD	28	#include <termios.h>
5afdca00 UD	29	#include <sys/resource.h>
	30	#include <sys/wait.h>
	31	#include <sys/socket.h>
	32
	33
b5567b2a	34	#ifndef SHARED
5afdca00 UD	35	/* We need a hook to force this file to be linked in when static
	36	libpthread is used. */
	37	const int __pthread_provide_wrappers = 0;
	38	#endif
	39
	40
	41	#define CANCELABLE_SYSCALL(res_type, name, param_list, params) \
	42	res_type __libc_##name param_list; \
	43	res_type \
f218b5f5	44	__attribute__ ((weak)) \
5afdca00 UD	45	name param_list \
	46	{ \
	47	res_type result; \
	48	int oldtype; \
	49	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
	50	result = __libc_##name params; \
	51	pthread_setcanceltype (oldtype, NULL); \
	52	return result; \
	53	}
	54
	55	#define CANCELABLE_SYSCALL_VA(res_type, name, param_list, params, last_arg) \
	56	res_type __libc_##name param_list; \
	57	res_type \
f218b5f5	58	__attribute__ ((weak)) \
5afdca00 UD	59	name param_list \
	60	{ \
	61	res_type result; \
	62	int oldtype; \
	63	va_list ap; \
	64	pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \
	65	va_start (ap, last_arg); \
	66	result = __libc_##name params; \
	67	va_end (ap); \
	68	pthread_setcanceltype (oldtype, NULL); \
	69	return result; \
	70	}
	71
	72
	73	/* close(2). */
	74	CANCELABLE_SYSCALL (int, close, (int fd), (fd))
	75	strong_alias (close, __close)
	76
	77
	78	/* fcntl(2). */
	79	CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...),
	80	(fd, cmd, va_arg (ap, long int)), cmd)
	81	strong_alias (fcntl, __fcntl)
	82
	83
	84	/* fsync(2). */
	85	CANCELABLE_SYSCALL (int, fsync, (int fd), (fd))
	86
	87
	88	/* lseek(2). */
	89	CANCELABLE_SYSCALL (off_t, lseek, (int fd, off_t offset, int whence),
	90	(fd, offset, whence))
	91	strong_alias (lseek, __lseek)
	92
	93
778c59c8 UD	94	/* lseek64(2). */
	95	CANCELABLE_SYSCALL (off64_t, lseek64, (int fd, off64_t offset, int whence),
	96	(fd, offset, whence))
	97
	98
5afdca00	99	/* msync(2). */
628a0aa1 UD	100	CANCELABLE_SYSCALL (int, msync, (__ptr_t addr, size_t length, int flags),
628a0aa1 UD	101	(addr, length, flags))
5afdca00 UD	102
	103
	104	/* nanosleep(2). */
	105	CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time,
	106	struct timespec *remaining),
	107	(requested_time, remaining))
	108
	109
	110	/* open(2). */
	111	CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...),
	112	(pathname, flags, va_arg (ap, mode_t)), flags)
	113	strong_alias (open, __open)
	114
	115
778c59c8 UD	116	/* open64(3). */
	117	CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...),
	118	(pathname, flags, va_arg (ap, mode_t)), flags)
	119	strong_alias (open64, __open64)
	120
	121
5afdca00 UD	122	/* pause(2). */
	123	CANCELABLE_SYSCALL (int, pause, (void), ())
	124
	125
778c59c8 UD	126	/* pread(3). */
	127	CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count,
	128	off_t offset),
	129	(fd, buf, count, offset))
	130
	131
	132	/* pread64(3). */
	133	CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count,
	134	off64_t offset),
	135	(fd, buf, count, offset))
	136	strong_alias (pread64, __pread64)
	137
	138
	139	/* pwrite(3). */
	140	CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n,
	141	off_t offset),
	142	(fd, buf, n, offset))
	143
	144
	145	/* pwrite64(3). */
	146	CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n,
	147	off64_t offset),
	148	(fd, buf, n, offset))
	149	strong_alias (pwrite64, __pwrite64)
	150
	151
5afdca00 UD	152	/* read(2). */
	153	CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count),
	154	(fd, buf, count))
	155	strong_alias (read, __read)
	156
	157
	158	/* system(3). */
	159	CANCELABLE_SYSCALL (int, system, (const char *line), (line))
	160
	161
	162	/* tcdrain(2). */
	163	CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd))
	164
	165
	166	/* wait(2). */
	167	CANCELABLE_SYSCALL (__pid_t, wait, (__WAIT_STATUS_DEFN stat_loc), (stat_loc))
	168	strong_alias (wait, __wait)
	169
	170
	171	/* waitpid(2). */
	172	CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc,
	173	int options),
	174	(pid, stat_loc, options))
	175
	176
	177	/* write(2). */
	178	CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n),
	179	(fd, buf, n))
	180	strong_alias (write, __write)
	181
	182
	183	/* The following system calls are thread cancellation points specified
	184	in XNS. */
	185
	186	/* accept(2). */
	187	CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr,
	188	socklen_t *addr_len),
	189	(fd, addr, addr_len))
	190
	191	/* connect(2). */
	192	CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr,
	193	socklen_t len),
	194	(fd, addr, len))
	195	strong_alias (connect, __connect)
	196
	197	/* recv(2). */
c2063191	198	CANCELABLE_SYSCALL (ssize_t, recv, (int fd, __ptr_t buf, size_t n, int flags),
5afdca00 UD	199	(fd, buf, n, flags))
	200
	201	/* recvfrom(2). */
c2063191 AJ	202	CANCELABLE_SYSCALL (ssize_t, recvfrom, (int fd, __ptr_t buf, size_t n, int flags,
c2063191 AJ	203	__SOCKADDR_ARG addr, socklen_t *addr_len),
5afdca00 UD	204	(fd, buf, n, flags, addr, addr_len))
	205
	206	/* recvmsg(2). */
c2063191	207	CANCELABLE_SYSCALL (ssize_t, recvmsg, (int fd, struct msghdr *message, int flags),
5afdca00 UD	208	(fd, message, flags))
	209
	210	/* send(2). */
c2063191 AJ	211	CANCELABLE_SYSCALL (ssize_t, send, (ssize_t fd, const __ptr_t buf, size_t n,
c2063191 AJ	212	int flags),
5afdca00 UD	213	(fd, buf, n, flags))
	214	strong_alias (send, __send)
	215
	216	/* sendmsg(2). */
c2063191 AJ	217	CANCELABLE_SYSCALL (ssize_t, sendmsg, (int fd, const struct msghdr *message,
c2063191 AJ	218	int flags),
5afdca00 UD	219	(fd, message, flags))
	220
	221	/* sendto(2). */
c2063191 AJ	222	CANCELABLE_SYSCALL (ssize_t, sendto, (ssize_t fd, const __ptr_t buf, size_t n,
	223	int flags, __CONST_SOCKADDR_ARG addr,
	224	socklen_t addr_len),
5afdca00	225	(fd, buf, n, flags, addr, addr_len))