io.c - platform/external/strace - Gitiles

 /*
  * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
  * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
  * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *	$Id$
  */

 #include "defs.h"

 #include <fcntl.h>
 #if HAVE_SYS_UIO_H
 #include <sys/uio.h>
 #endif

 #ifdef HAVE_LONG_LONG_OFF_T
 /*
  * Hacks for systems that have a long long off_t
  */

 #define sys_pread64	sys_pread
 #define sys_pwrite64	sys_pwrite
 #endif

 int
 sys_read(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 	} else {
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 int
 sys_write(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 #if HAVE_SYS_UIO_H
 void
 tprint_iov(tcp, len, addr)
 struct tcb * tcp;
 int len;
 long addr;
 {
 	struct iovec *iov;
 	int i;


 	if (!len) {
 		tprintf("[]");
 		return;
 	}

 	if ((iov = (struct iovec *) malloc(len * sizeof *iov)) == NULL) {
 		fprintf(stderr, "No memory");
 		return;
 	}
 	if (umoven(tcp, addr,
 		   len * sizeof *iov, (char *) iov) < 0) {
 		tprintf("%#lx", tcp->u_arg[1]);
 	} else {
 		tprintf("[");
 		for (i = 0; i < len; i++) {
 			if (i)
 				tprintf(", ");
 			tprintf("{");
 			printstr(tcp, (long) iov[i].iov_base,
 				iov[i].iov_len);
 			tprintf(", %lu}", (unsigned long)iov[i].iov_len);
 		}
 		tprintf("]");
 	}
 	free((char *) iov);
 }

 int
 sys_readv(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 	} else {
 		if (syserror(tcp)) {
 			tprintf("%#lx, %lu",
 					tcp->u_arg[1], tcp->u_arg[2]);
 			return 0;
 		}
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }

 int
 sys_writev(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 		tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
 		tprintf(", %lu", tcp->u_arg[2]);
 	}
 	return 0;
 }
 #endif

 #if defined(SVR4)

 int
 sys_pread(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 	} else {
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 #if UNIXWARE
 		/* off_t is signed int */
 		tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 #else
 		tprintf(", %lu, %llu", tcp->u_arg[2],
 			LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 #endif
 	}
 	return 0;
 }

 int
 sys_pwrite(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 #if UNIXWARE
 		/* off_t is signed int */
 		tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
 #else
 		tprintf(", %lu, %llu", tcp->u_arg[2],
 			LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 #endif
 	}
 	return 0;
 }
 #endif /* SVR4 */

 #ifdef FREEBSD
 #include <sys/types.h>
 #include <sys/socket.h>

 int
 sys_sendfile(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, %ld, %llu, %lu", tcp->u_arg[0], tcp->u_arg[1],
 			LONG_LONG(tcp->u_arg[2], tcp->u_arg[3]),
 			tcp->u_arg[4]);
 	} else {
 		off_t offset;

 		if (!tcp->u_arg[5])
 			tprintf(", NULL");
 		else {
 			struct sf_hdtr hdtr;

 			if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
 				tprintf(", %#lx", tcp->u_arg[5]);
 			else {
 				tprintf(", { ");
 				tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers);
 				tprintf(", %u, ", hdtr.hdr_cnt);
 				tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers);
 				tprintf(", %u }", hdtr.hdr_cnt);
 			}
 		}
 		if (!tcp->u_arg[6])
 			tprintf(", NULL");
 		else if (umove(tcp, tcp->u_arg[6], &offset) < 0)
 			tprintf(", %#lx", tcp->u_arg[6]);
 		else
 			tprintf(", [%llu]", offset);
 		tprintf(", %lu", tcp->u_arg[7]);
 	}
 	return 0;
 }
 #endif /* FREEBSD */

 #ifdef LINUX

 /* The SH4 ABI does allow long longs in odd-numbered registers, but
    does not allow them to be split between registers and memory - and
    there are only four argument registers for normal functions.  As a
    result pread takes an extra padding argument before the offset.  This
    was changed late in the 2.4 series (around 2.4.20).  */
 #if defined(SH)
 #define PREAD_OFFSET_ARG 4
 #else
 #define PREAD_OFFSET_ARG 3
 #endif

 int
 sys_pread(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 	} else {
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 		ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
 		tprintf(", %lu, %llu", tcp->u_arg[2],
 			*(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
 	}
 	return 0;
 }

 int
 sys_pwrite(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
 		tprintf(", %lu, %llu", tcp->u_arg[2],
 			*(unsigned long long *)&tcp->u_arg[PREAD_OFFSET_ARG]);
 	}
 	return 0;
 }

 int
 sys_sendfile(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		off_t offset;

 		tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 		if (!tcp->u_arg[2])
 			tprintf("NULL");
 		else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
 			tprintf("%#lx", tcp->u_arg[2]);
 		else
 			tprintf("[%lu]", offset);
 		tprintf(", %lu", tcp->u_arg[3]);
 	}
 	return 0;
 }

 int
 sys_sendfile64(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		loff_t offset;

 		tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
 		if (!tcp->u_arg[2])
 			tprintf("NULL");
 		else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
 			tprintf("%#lx", tcp->u_arg[2]);
 		else
 			tprintf("[%llu]", (unsigned long long int) offset);
 		tprintf(", %lu", tcp->u_arg[3]);
 	}
 	return 0;
 }

 #endif /* LINUX */

 #if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
 int
 sys_pread64(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 	} else {
 		ALIGN64 (tcp, 3);
 		if (syserror(tcp))
 			tprintf("%#lx", tcp->u_arg[1]);
 		else
 			printstr(tcp, tcp->u_arg[1], tcp->u_rval);
 		tprintf(", %lu, %#llx", tcp->u_arg[2],
 			LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 	}
 	return 0;
 }

 int
 sys_pwrite64(tcp)
 struct tcb *tcp;
 {
 	if (entering(tcp)) {
 		ALIGN64 (tcp, 3);
 		tprintf("%ld, ", tcp->u_arg[0]);
 		printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 		tprintf(", %lu, %#llx", tcp->u_arg[2],
 			LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
 	}
 	return 0;
 }
 #endif

 int
 sys_ioctl(tcp)
 struct tcb *tcp;
 {
 	const struct ioctlent *iop;

 	if (entering(tcp)) {
 		tprintf("%ld, ", tcp->u_arg[0]);
 		iop = ioctl_lookup(tcp->u_arg[1]);
 		if (iop) {
 			tprintf("%s", iop->symbol);
 			while ((iop = ioctl_next_match(iop)))
 				tprintf(" or %s", iop->symbol);
 		} else
 			tprintf("%#lx", tcp->u_arg[1]);
 		ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
 	}
 	else {
 		int ret;
 		if (!(ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2])))
 			tprintf(", %#lx", tcp->u_arg[2]);
 		else
 			return ret - 1;
 	}
 	return 0;
 }
	/*
	* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
	* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
	* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
	* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	* $Id$
	*/

	#include "defs.h"

	#include <fcntl.h>
	#if HAVE_SYS_UIO_H
	#include <sys/uio.h>
	#endif

	#ifdef HAVE_LONG_LONG_OFF_T
	/*
	* Hacks for systems that have a long long off_t
	*/

	#define sys_pread64 sys_pread
	#define sys_pwrite64 sys_pwrite
	#endif

	int
	sys_read(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	} else {
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	int
	sys_write(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	#if HAVE_SYS_UIO_H
	void
	tprint_iov(tcp, len, addr)
	struct tcb * tcp;
	int len;
	long addr;
	{
	struct iovec *iov;
	int i;


	if (!len) {
	tprintf("[]");
	return;
	}

	if ((iov = (struct iovec ) malloc(len sizeof *iov)) == NULL) {
	fprintf(stderr, "No memory");
	return;
	}
	if (umoven(tcp, addr,
	len * sizeof iov, (char ) iov) < 0) {
	tprintf("%#lx", tcp->u_arg[1]);
	} else {
	tprintf("[");
	for (i = 0; i < len; i++) {
	if (i)
	tprintf(", ");
	tprintf("{");
	printstr(tcp, (long) iov[i].iov_base,
	iov[i].iov_len);
	tprintf(", %lu}", (unsigned long)iov[i].iov_len);
	}
	tprintf("]");
	}
	free((char *) iov);
	}

	int
	sys_readv(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	} else {
	if (syserror(tcp)) {
	tprintf("%#lx, %lu",
	tcp->u_arg[1], tcp->u_arg[2]);
	return 0;
	}
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}

	int
	sys_writev(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	tprint_iov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
	tprintf(", %lu", tcp->u_arg[2]);
	}
	return 0;
	}
	#endif

	#if defined(SVR4)

	int
	sys_pread(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	} else {
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	#if UNIXWARE
	/* off_t is signed int */
	tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
	#else
	tprintf(", %lu, %llu", tcp->u_arg[2],
	LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
	#endif
	}
	return 0;
	}

	int
	sys_pwrite(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	#if UNIXWARE
	/* off_t is signed int */
	tprintf(", %lu, %ld", tcp->u_arg[2], tcp->u_arg[3]);
	#else
	tprintf(", %lu, %llu", tcp->u_arg[2],
	LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
	#endif
	}
	return 0;
	}
	#endif /* SVR4 */

	#ifdef FREEBSD
	#include <sys/types.h>
	#include <sys/socket.h>

	int
	sys_sendfile(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, %ld, %llu, %lu", tcp->u_arg[0], tcp->u_arg[1],
	LONG_LONG(tcp->u_arg[2], tcp->u_arg[3]),
	tcp->u_arg[4]);
	} else {
	off_t offset;

	if (!tcp->u_arg[5])
	tprintf(", NULL");
	else {
	struct sf_hdtr hdtr;

	if (umove(tcp, tcp->u_arg[5], &hdtr) < 0)
	tprintf(", %#lx", tcp->u_arg[5]);
	else {
	tprintf(", { ");
	tprint_iov(tcp, hdtr.hdr_cnt, hdtr.headers);
	tprintf(", %u, ", hdtr.hdr_cnt);
	tprint_iov(tcp, hdtr.trl_cnt, hdtr.trailers);
	tprintf(", %u }", hdtr.hdr_cnt);
	}
	}
	if (!tcp->u_arg[6])
	tprintf(", NULL");
	else if (umove(tcp, tcp->u_arg[6], &offset) < 0)
	tprintf(", %#lx", tcp->u_arg[6]);
	else
	tprintf(", [%llu]", offset);
	tprintf(", %lu", tcp->u_arg[7]);
	}
	return 0;
	}
	#endif /* FREEBSD */

	#ifdef LINUX

	/* The SH4 ABI does allow long longs in odd-numbered registers, but
	does not allow them to be split between registers and memory - and
	there are only four argument registers for normal functions. As a
	result pread takes an extra padding argument before the offset. This
	was changed late in the 2.4 series (around 2.4.20). */
	#if defined(SH)
	#define PREAD_OFFSET_ARG 4
	#else
	#define PREAD_OFFSET_ARG 3
	#endif

	int
	sys_pread(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	} else {
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
	tprintf(", %lu, %llu", tcp->u_arg[2],
	(unsigned long long )&tcp->u_arg[PREAD_OFFSET_ARG]);
	}
	return 0;
	}

	int
	sys_pwrite(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	ALIGN64 (tcp, PREAD_OFFSET_ARG); /* PowerPC alignment restriction */
	tprintf(", %lu, %llu", tcp->u_arg[2],
	(unsigned long long )&tcp->u_arg[PREAD_OFFSET_ARG]);
	}
	return 0;
	}

	int
	sys_sendfile(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	off_t offset;

	tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
	if (!tcp->u_arg[2])
	tprintf("NULL");
	else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
	tprintf("%#lx", tcp->u_arg[2]);
	else
	tprintf("[%lu]", offset);
	tprintf(", %lu", tcp->u_arg[3]);
	}
	return 0;
	}

	int
	sys_sendfile64(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	loff_t offset;

	tprintf("%ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
	if (!tcp->u_arg[2])
	tprintf("NULL");
	else if (umove(tcp, tcp->u_arg[2], &offset) < 0)
	tprintf("%#lx", tcp->u_arg[2]);
	else
	tprintf("[%llu]", (unsigned long long int) offset);
	tprintf(", %lu", tcp->u_arg[3]);
	}
	return 0;
	}

	#endif /* LINUX */

	#if _LFS64_LARGEFILE \|\| HAVE_LONG_LONG_OFF_T
	int
	sys_pread64(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	} else {
	ALIGN64 (tcp, 3);
	if (syserror(tcp))
	tprintf("%#lx", tcp->u_arg[1]);
	else
	printstr(tcp, tcp->u_arg[1], tcp->u_rval);
	tprintf(", %lu, %#llx", tcp->u_arg[2],
	LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
	}
	return 0;
	}

	int
	sys_pwrite64(tcp)
	struct tcb *tcp;
	{
	if (entering(tcp)) {
	ALIGN64 (tcp, 3);
	tprintf("%ld, ", tcp->u_arg[0]);
	printstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	tprintf(", %lu, %#llx", tcp->u_arg[2],
	LONG_LONG(tcp->u_arg[3], tcp->u_arg[4]));
	}
	return 0;
	}
	#endif

	int
	sys_ioctl(tcp)
	struct tcb *tcp;
	{
	const struct ioctlent *iop;

	if (entering(tcp)) {
	tprintf("%ld, ", tcp->u_arg[0]);
	iop = ioctl_lookup(tcp->u_arg[1]);
	if (iop) {
	tprintf("%s", iop->symbol);
	while ((iop = ioctl_next_match(iop)))
	tprintf(" or %s", iop->symbol);
	} else
	tprintf("%#lx", tcp->u_arg[1]);
	ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2]);
	}
	else {
	int ret;
	if (!(ret = ioctl_decode(tcp, tcp->u_arg[1], tcp->u_arg[2])))
	tprintf(", %#lx", tcp->u_arg[2]);
	else
	return ret - 1;
	}
	return 0;
	}