1/*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 *	$Id: desc.c,v 1.22 2005/06/01 19:22:07 roland Exp $
31 */
32
33#include "defs.h"
34
35#include <fcntl.h>
36#include <sys/file.h>
37#ifdef LINUX
38#include <inttypes.h>
39#endif
40#ifdef HAVE_SYS_EPOLL_H
41#include <sys/epoll.h>
42#endif
43#ifdef HAVE_LIBAIO_H
44#include <libaio.h>
45#endif
46
47#if HAVE_LONG_LONG_OFF_T
48/*
49 * Hacks for systems that have a long long off_t
50 */
51#define flock64	flock		/* Horrid hack */
52#define printflock printflock64	/* Horrider hack */
53#endif
54
55
56static const struct xlat fcntlcmds[] = {
57	{ F_DUPFD,	"F_DUPFD"	},
58	{ F_GETFD,	"F_GETFD"	},
59	{ F_SETFD,	"F_SETFD"	},
60	{ F_GETFL,	"F_GETFL"	},
61	{ F_SETFL,	"F_SETFL"	},
62	{ F_GETLK,	"F_GETLK"	},
63	{ F_SETLK,	"F_SETLK"	},
64	{ F_SETLKW,	"F_SETLKW"	},
65	{ F_GETOWN,	"F_GETOWN"	},
66	{ F_SETOWN,	"F_SETOWN"	},
67#ifdef F_RSETLK
68	{ F_RSETLK,	"F_RSETLK"	},
69#endif
70#ifdef F_RSETLKW
71	{ F_RSETLKW,	"F_RSETLKW"	},
72#endif
73#ifdef F_RGETLK
74	{ F_RGETLK,	"F_RGETLK"	},
75#endif
76#ifdef F_CNVT
77	{ F_CNVT,	"F_CNVT"	},
78#endif
79#ifdef F_SETSIG
80	{ F_SETSIG,	"F_SETSIG"	},
81#endif
82#ifdef F_GETSIG
83	{ F_GETSIG,	"F_GETSIG"	},
84#endif
85#ifdef F_CHKFL
86	{ F_CHKFL,	"F_CHKFL"	},
87#endif
88#ifdef F_DUP2FD
89	{ F_DUP2FD,	"F_DUP2FD"	},
90#endif
91#ifdef F_ALLOCSP
92	{ F_ALLOCSP,	"F_ALLOCSP"	},
93#endif
94#ifdef F_ISSTREAM
95	{ F_ISSTREAM,	"F_ISSTREAM"	},
96#endif
97#ifdef F_PRIV
98	{ F_PRIV,	"F_PRIV"	},
99#endif
100#ifdef F_NPRIV
101	{ F_NPRIV,	"F_NPRIV"	},
102#endif
103#ifdef F_QUOTACL
104	{ F_QUOTACL,	"F_QUOTACL"	},
105#endif
106#ifdef F_BLOCKS
107	{ F_BLOCKS,	"F_BLOCKS"	},
108#endif
109#ifdef F_BLKSIZE
110	{ F_BLKSIZE,	"F_BLKSIZE"	},
111#endif
112#ifdef F_GETOWN
113	{ F_GETOWN,	"F_GETOWN"	},
114#endif
115#ifdef F_SETOWN
116	{ F_SETOWN,	"F_SETOWN"	},
117#endif
118#ifdef F_REVOKE
119	{ F_REVOKE,	"F_REVOKE"	},
120#endif
121#ifdef F_SETLK
122	{ F_SETLK,	"F_SETLK"	},
123#endif
124#ifdef F_SETLKW
125	{ F_SETLKW,	"F_SETLKW"	},
126#endif
127#ifdef F_FREESP
128	{ F_FREESP,	"F_FREESP"	},
129#endif
130#ifdef F_GETLK
131	{ F_GETLK,	"F_GETLK"	},
132#endif
133#ifdef F_SETLK64
134	{ F_SETLK64,	"F_SETLK64"	},
135#endif
136#ifdef F_SETLKW64
137	{ F_SETLKW64,	"F_SETLKW64"	},
138#endif
139#ifdef F_FREESP64
140	{ F_FREESP64,	"F_FREESP64"	},
141#endif
142#ifdef F_GETLK64
143	{ F_GETLK64,	"F_GETLK64"	},
144#endif
145#ifdef F_SHARE
146	{ F_SHARE,	"F_SHARE"	},
147#endif
148#ifdef F_UNSHARE
149	{ F_UNSHARE,	"F_UNSHARE"	},
150#endif
151	{ 0,		NULL		},
152};
153
154static const struct xlat fdflags[] = {
155#ifdef FD_CLOEXEC
156	{ FD_CLOEXEC,	"FD_CLOEXEC"	},
157#endif
158	{ 0,		NULL		},
159};
160
161#ifdef LOCK_SH
162
163static const struct xlat flockcmds[] = {
164	{ LOCK_SH,	"LOCK_SH"	},
165	{ LOCK_EX,	"LOCK_EX"	},
166	{ LOCK_NB,	"LOCK_NB"	},
167	{ LOCK_UN,	"LOCK_UN"	},
168	{ 0,		NULL		},
169};
170
171#endif /* LOCK_SH */
172
173static const struct xlat lockfcmds[] = {
174	{ F_RDLCK,	"F_RDLCK"	},
175	{ F_WRLCK,	"F_WRLCK"	},
176	{ F_UNLCK,	"F_UNLCK"	},
177#ifdef F_EXLCK
178	{ F_EXLCK,	"F_EXLCK"	},
179#endif
180#ifdef F_SHLCK
181	{ F_SHLCK,	"F_SHLCK"	},
182#endif
183	{ 0,		NULL		},
184};
185
186static const struct xlat whence[] = {
187	{ SEEK_SET,	"SEEK_SET"	},
188	{ SEEK_CUR,	"SEEK_CUR"	},
189	{ SEEK_END,	"SEEK_END"	},
190	{ 0,		NULL		},
191};
192
193#ifndef HAVE_LONG_LONG_OFF_T
194/* fcntl/lockf */
195static void
196printflock(tcp, addr, getlk)
197struct tcb *tcp;
198long addr;
199int getlk;
200{
201	struct flock fl;
202
203	if (umove(tcp, addr, &fl) < 0) {
204		tprintf("{...}");
205		return;
206	}
207	tprintf("{type=");
208	printxval(lockfcmds, fl.l_type, "F_???");
209	tprintf(", whence=");
210	printxval(whence, fl.l_whence, "SEEK_???");
211	tprintf(", start=%ld, len=%ld", fl.l_start, fl.l_len);
212	if (getlk)
213		tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
214	else
215		tprintf("}");
216}
217#endif
218
219#if _LFS64_LARGEFILE || HAVE_LONG_LONG_OFF_T
220/* fcntl/lockf */
221static void
222printflock64(tcp, addr, getlk)
223struct tcb *tcp;
224long addr;
225int getlk;
226{
227	struct flock64 fl;
228
229	if (umove(tcp, addr, &fl) < 0) {
230		tprintf("{...}");
231		return;
232	}
233	tprintf("{type=");
234	printxval(lockfcmds, fl.l_type, "F_???");
235	tprintf(", whence=");
236	printxval(whence, fl.l_whence, "SEEK_???");
237	tprintf(", start=%lld, len=%lld", (long long) fl.l_start, (long long) fl.l_len);
238	if (getlk)
239		tprintf(", pid=%lu}", (unsigned long) fl.l_pid);
240	else
241		tprintf("}");
242}
243#endif
244
245static char *
246sprintflags(xlat, flags)
247const struct xlat *xlat;
248int flags;
249{
250	static char outstr[1024];
251	char *sep;
252
253	strcpy(outstr, "flags ");
254	sep = "";
255	for (; xlat->str; xlat++) {
256		if ((flags & xlat->val) == xlat->val) {
257			sprintf(outstr + strlen(outstr),
258				"%s%s", sep, xlat->str);
259			sep = "|";
260			flags &= ~xlat->val;
261		}
262	}
263	if (flags)
264		sprintf(outstr + strlen(outstr),
265			"%s%#x", sep, flags);
266	return outstr;
267}
268
269int
270sys_fcntl(tcp)
271struct tcb *tcp;
272{
273	extern const struct xlat openmodes[];
274
275	if (entering(tcp)) {
276		tprintf("%ld, ", tcp->u_arg[0]);
277		printxval(fcntlcmds, tcp->u_arg[1], "F_???");
278		switch (tcp->u_arg[1]) {
279		case F_SETFD:
280			tprintf(", ");
281			printflags(fdflags, tcp->u_arg[2], "FD_???");
282			break;
283		case F_SETOWN: case F_DUPFD:
284			tprintf(", %ld", tcp->u_arg[2]);
285			break;
286		case F_SETFL:
287			tprintf(", ");
288			printflags(openmodes, tcp->u_arg[2] + 1, "O_???");
289			break;
290		case F_SETLK: case F_SETLKW:
291#ifdef F_FREESP
292		case F_FREESP:
293#endif
294			tprintf(", ");
295			printflock(tcp, tcp->u_arg[2], 0);
296			break;
297#if _LFS64_LARGEFILE
298#ifdef F_FREESP64
299		case F_FREESP64:
300#endif
301		/* Linux glibc defines SETLK64 as SETLK,
302		   even though the kernel has different values - as does Solaris. */
303#if defined(F_SETLK64) && F_SETLK64+0!=F_SETLK
304		case F_SETLK64:
305#endif
306#if defined(F_SETLKW64) && F_SETLKW64+0!=F_SETLKW
307		case F_SETLKW64:
308#endif
309			tprintf(", ");
310			printflock64(tcp, tcp->u_arg[2], 0);
311			break;
312#endif
313 		}
314	}
315	else {
316		switch (tcp->u_arg[1]) {
317		case F_DUPFD:
318		case F_SETFD: case F_SETFL:
319		case F_SETLK: case F_SETLKW:
320		case F_SETOWN: case F_GETOWN:
321			break;
322		case F_GETFD:
323			if (tcp->u_rval == 0)
324				return 0;
325			tcp->auxstr = sprintflags(fdflags, tcp->u_rval);
326			return RVAL_HEX|RVAL_STR;
327		case F_GETFL:
328			tcp->auxstr = sprintflags(openmodes, tcp->u_rval + 1);
329			return RVAL_HEX|RVAL_STR;
330		case F_GETLK:
331			tprintf(", ");
332			printflock(tcp, tcp->u_arg[2], 1);
333			break;
334#if _LFS64_LARGEFILE
335#if defined(F_GETLK64) && F_GETLK64+0!=F_GETLK
336		case F_GETLK64:
337#endif
338			tprintf(", ");
339			printflock64(tcp, tcp->u_arg[2], 1);
340			break;
341#endif
342 		default:
343			tprintf(", %#lx", tcp->u_arg[2]);
344			break;
345		}
346	}
347	return 0;
348}
349
350#ifdef LOCK_SH
351
352int
353sys_flock(tcp)
354struct tcb *tcp;
355{
356	if (entering(tcp)) {
357		tprintf("%ld, ", tcp->u_arg[0]);
358		printflags(flockcmds, tcp->u_arg[1], "LOCK_???");
359	}
360	return 0;
361}
362#endif /* LOCK_SH */
363
364int
365sys_close(tcp)
366struct tcb *tcp;
367{
368	if (entering(tcp)) {
369		tprintf("%ld", tcp->u_arg[0]);
370	}
371	return 0;
372}
373
374int
375sys_dup(tcp)
376struct tcb *tcp;
377{
378	if (entering(tcp)) {
379		tprintf("%ld", tcp->u_arg[0]);
380	}
381	return 0;
382}
383
384int
385sys_dup2(tcp)
386struct tcb *tcp;
387{
388	if (entering(tcp)) {
389		tprintf("%ld, %ld", tcp->u_arg[0], tcp->u_arg[1]);
390	}
391	return 0;
392}
393
394int
395sys_getdtablesize(tcp)
396struct tcb *tcp;
397{
398	return 0;
399}
400
401static int
402decode_select(tcp, args, bitness)
403struct tcb *tcp;
404long *args;
405int bitness;
406{
407	int i, j, nfds;
408	unsigned int fdsize = ((((args[0] + 7) / 8) + sizeof(long) - 1)
409			       & -sizeof(long));
410	fd_set *fds;
411	struct timeval tv;
412#ifdef ALPHA
413	struct timeval32 {
414		unsigned tv_sec;
415		unsigned tv_usec;
416	} *tv32;
417#endif
418	static char outstr[1024];
419	char *sep;
420	long arg;
421
422	if (entering(tcp)) {
423		fds = (fd_set *) malloc(fdsize);
424		if (fds == NULL)
425			fprintf(stderr, "out of memory\n");
426		nfds = args[0];
427		tprintf("%d", nfds);
428		for (i = 0; i < 3; i++) {
429			arg = args[i+1];
430			if (arg == 0) {
431				tprintf(", NULL");
432				continue;
433			}
434			if (fds == NULL || !verbose(tcp)) {
435				tprintf(", %#lx", arg);
436				continue;
437			}
438			if (umoven(tcp, arg, fdsize, (char *) fds) < 0) {
439				tprintf(", [?]");
440				continue;
441			}
442			tprintf(", [");
443			for (j = 0, sep = ""; j < nfds; j++) {
444				if (FD_ISSET(j, fds)) {
445					tprintf("%s%u", sep, j);
446					sep = " ";
447				}
448			}
449			tprintf("]");
450		}
451		free(fds);
452		if (!args[4])
453			tprintf(", NULL");
454		else if (!verbose(tcp))
455			tprintf(", %#lx", args[4]);
456		else if (umove(tcp, args[4], &tv) < 0)
457			tprintf(", {...}");
458		else {
459#ifdef ALPHA
460			if (bitness) {
461				tv32=(struct timeval32*)&tv;
462				tprintf(", {%u, %u}", tv32->tv_sec, tv32->tv_usec);
463			} else
464#endif
465				tprintf(", {%lu, %lu}",
466					(long) tv.tv_sec, (long) tv.tv_usec);
467		}
468	}
469	else
470	{
471		unsigned int cumlen = 0;
472		char *sep = "";
473
474		if (syserror(tcp))
475			return 0;
476
477		if ((nfds = tcp->u_rval) == 0) {
478			tcp->auxstr = "Timeout";
479			return RVAL_STR;
480		}
481
482		fds = (fd_set *) malloc(fdsize);
483		if (fds == NULL)
484			fprintf(stderr, "out of memory\n");
485
486		outstr[0] = '\0';
487		for (i = 0; i < 3; i++) {
488			int first = 1;
489			char str[20];
490
491			tcp->auxstr = outstr;
492			arg = args[i+1];
493			if (fds == NULL || !arg ||
494			    umoven(tcp, arg, fdsize, (char *) fds) < 0)
495				continue;
496			for (j = 0; j < args[0]; j++) {
497				if (FD_ISSET(j, fds)) {
498					if (first) {
499						sprintf(str, "%s%s [%u", sep,
500							i == 0 ? "in" :
501							i == 1 ? "out" :
502							"except", j);
503						first = 0;
504						sep = ", ";
505					}
506					else
507						sprintf(str, " %u", j);
508					cumlen += strlen(str);
509					if (cumlen < sizeof(outstr))
510						strcat(outstr, str);
511					nfds--;
512				}
513			}
514			if (cumlen)
515				strcat(outstr, "]");
516			if (nfds == 0)
517				break;
518		}
519		free(fds);
520#ifdef LINUX
521		/* This contains no useful information on SunOS.  */
522		if (args[4]) {
523			char str[64];
524
525			if (umove(tcp, args[4], &tv) >= 0) {
526#ifdef ALPHA
527				if (bitness) {
528					tv32=(struct timeval32*)&tv;
529					sprintf(str, "%sleft {%u, %u}", sep,
530						tv32->tv_sec, tv32->tv_usec);
531				} else
532#endif
533					sprintf(str, "%sleft {%lu, %lu}", sep,
534						(long) tv.tv_sec, (long) tv.tv_usec);
535
536				if ((cumlen += strlen(str)) < sizeof(outstr))
537					strcat(outstr, str);
538			}
539		}
540#endif /* LINUX */
541		return RVAL_STR;
542	}
543	return 0;
544}
545
546#ifdef LINUX
547
548int
549sys_oldselect(tcp)
550struct tcb *tcp;
551{
552	long args[5];
553
554	if (umoven(tcp, tcp->u_arg[0], sizeof args, (char *) args) < 0) {
555		tprintf("[...]");
556		return 0;
557	}
558	return decode_select(tcp, args, 0);
559}
560
561#ifdef ALPHA
562int
563sys_osf_select(tcp)
564struct tcb *tcp;
565{
566	long *args = tcp->u_arg;
567	return decode_select(tcp, args, 1);
568}
569#endif
570
571static struct xlat epollctls[] = {
572#ifdef EPOLL_CTL_ADD
573	{ EPOLL_CTL_ADD,	"EPOLL_CTL_ADD"	},
574#endif
575#ifdef EPOLL_CTL_MOD
576	{ EPOLL_CTL_MOD,	"EPOLL_CTL_MOD"	},
577#endif
578#ifdef EPOLL_CTL_DEL
579	{ EPOLL_CTL_DEL,	"EPOLL_CTL_DEL"	},
580#endif
581	{ 0,			NULL		}
582};
583
584static struct xlat epollevents[] = {
585#ifdef EPOLLIN
586	{ EPOLLIN,	"EPOLLIN"	},
587#endif
588#ifdef EPOLLPRI
589	{ EPOLLPRI,	"EPOLLPRI"	},
590#endif
591#ifdef EPOLLOUT
592	{ EPOLLOUT,	"EPOLLOUT"	},
593#endif
594#ifdef EPOLLRDNORM
595	{ EPOLLRDNORM,	"EPOLLRDNORM"	},
596#endif
597#ifdef EPOLLRDBAND
598	{ EPOLLRDBAND,	"EPOLLRDBAND"	},
599#endif
600#ifdef EPOLLWRNORM
601	{ EPOLLWRNORM,	"EPOLLWRNORM"	},
602#endif
603#ifdef EPOLLWRBAND
604	{ EPOLLWRBAND,	"EPOLLWRBAND"	},
605#endif
606#ifdef EPOLLMSG
607	{ EPOLLMSG,	"EPOLLMSG"	},
608#endif
609#ifdef EPOLLERR
610	{ EPOLLERR,	"EPOLLERR"	},
611#endif
612#ifdef EPOLLHUP
613	{ EPOLLHUP,	"EPOLLHUP"	},
614#endif
615#ifdef EPOLLONESHOT
616	{ EPOLLONESHOT,	"EPOLLONESHOT"	},
617#endif
618#ifdef EPOLLET
619	{ EPOLLET,	"EPOLLET"	},
620#endif
621	{ 0,		NULL		}
622};
623
624int
625sys_epoll_create(tcp)
626struct tcb *tcp;
627{
628	if (entering(tcp))
629		tprintf("%ld", tcp->u_arg[0]);
630	return 0;
631}
632
633#ifdef HAVE_SYS_EPOLL_H
634static void
635print_epoll_event(ev)
636struct epoll_event *ev;
637{
638	tprintf("{");
639	printflags(epollevents, ev->events, "EPOLL???");
640	/* We cannot know what format the program uses, so print u32 and u64
641	   which will cover every value.  */
642	tprintf(", {u32=%" PRIu32 ", u64=%" PRIu64 "}}",
643		ev->data.u32, ev->data.u64);
644}
645#endif
646
647int
648sys_epoll_ctl(tcp)
649struct tcb *tcp;
650{
651	if (entering(tcp)) {
652		tprintf("%ld, ", tcp->u_arg[0]);
653                printxval(epollctls, tcp->u_arg[1], "EPOLL_CTL_???");
654		tprintf(", %ld, ", tcp->u_arg[2]);
655		if (tcp->u_arg[3] == 0)
656			tprintf("NULL");
657		else {
658#ifdef HAVE_SYS_EPOLL_H
659			struct epoll_event ev;
660			if (umove(tcp, tcp->u_arg[3], &ev) == 0)
661				print_epoll_event(&ev);
662			else
663#endif
664				tprintf("{...}");
665		}
666	}
667	return 0;
668}
669
670int
671sys_epoll_wait(tcp)
672struct tcb *tcp;
673{
674	if (entering(tcp))
675		tprintf("%ld, ", tcp->u_arg[0]);
676	else {
677		if (syserror(tcp))
678			tprintf("%lx", tcp->u_arg[1]);
679		else if (tcp->u_rval == 0)
680			tprintf("{}");
681		else {
682#ifdef HAVE_SYS_EPOLL_H
683			struct epoll_event ev, *start, *cur, *end;
684			int failed = 0;
685
686			tprintf("{");
687			start = (struct epoll_event *) tcp->u_arg[1];
688			end = start + tcp->u_rval;
689			for (cur = start; cur < end; ++cur) {
690				if (cur > start)
691					tprintf(", ");
692				if (umove(tcp, (long) cur, &ev) == 0)
693					print_epoll_event(&ev);
694				else {
695					tprintf("?");
696					failed = 1;
697					break;
698				}
699			}
700			tprintf("}");
701			if (failed)
702				tprintf(" %#lx", (long) start);
703#else
704			tprintf("{...}");
705#endif
706		}
707		tprintf(", %ld, %ld", tcp->u_arg[2], tcp->u_arg[3]);
708	}
709	return 0;
710}
711
712int
713sys_io_setup(tcp)
714struct tcb *tcp;
715{
716	if (entering(tcp))
717		tprintf("%ld, ", tcp->u_arg[0]);
718	else {
719		if (syserror(tcp))
720			tprintf("0x%0lx", tcp->u_arg[1]);
721		else {
722			unsigned long user_id;
723			if (umove(tcp, tcp->u_arg[1], &user_id) == 0)
724				tprintf("{%lu}", user_id);
725			else
726				tprintf("{...}");
727		}
728	}
729	return 0;
730}
731
732int
733sys_io_destroy(tcp)
734struct tcb *tcp;
735{
736	if (entering(tcp))
737		tprintf("%lu", tcp->u_arg[0]);
738	return 0;
739}
740
741int
742sys_io_submit(tcp)
743struct tcb *tcp;
744{
745	long nr;
746	if (entering(tcp)) {
747		tprintf("%lu, %ld, ", tcp->u_arg[0], tcp->u_arg[1]);
748		nr = tcp->u_arg[1];
749		/* and if nr is negative? */
750		if (nr == 0)
751			tprintf("{}");
752		else {
753#ifdef HAVE_LIBAIO_H
754			long i;
755			struct iocb *iocbp, **iocbs = (void *)tcp->u_arg[2];
756
757			for (i = 0; i < nr; i++, iocbs++) {
758				struct iocb iocb;
759				if (i == 0)
760					tprintf("{");
761				else
762					tprintf(", ");
763
764				if (umove(tcp, (unsigned long)iocbs, &iocbp) ||
765				    umove(tcp, (unsigned long)iocbp, &iocb)) {
766					tprintf("{...}");
767					continue;
768				}
769				tprintf("{%p, %u, %hu, %hu, %d}",
770					iocb.data, iocb.key,
771					iocb.aio_lio_opcode,
772					iocb.aio_reqprio, iocb.aio_fildes);
773			}
774			if (i)
775				tprintf("}");
776#else
777			tprintf("{...}");
778#endif
779		}
780	}
781	return 0;
782}
783
784int
785sys_io_cancel(tcp)
786struct tcb *tcp;
787{
788	if (entering(tcp)) {
789#ifdef HAVE_LIBAIO_H
790		struct iocb iocb;
791#endif
792		tprintf("%lu, ", tcp->u_arg[0]);
793#ifdef HAVE_LIBAIO_H
794		if (umove(tcp, tcp->u_arg[1], &iocb) == 0) {
795			tprintf("{%p, %u, %hu, %hu, %d}, ",
796				iocb.data, iocb.key,
797				iocb.aio_lio_opcode,
798				iocb.aio_reqprio, iocb.aio_fildes);
799		} else
800#endif
801			tprintf("{...}, ");
802	} else {
803		if (tcp->u_rval < 0)
804			tprintf("{...}");
805		else {
806#ifdef HAVE_LIBAIO_H
807			struct io_event event;
808			if (umove(tcp, tcp->u_arg[2], &event) == 0)
809				tprintf("{%p, %p, %ld, %ld}",
810					event.data, event.obj,
811					event.res, event.res2);
812			else
813#endif
814				tprintf("{...}");
815		}
816	}
817	return 0;
818}
819
820int
821sys_io_getevents(tcp)
822struct tcb *tcp;
823{
824	if (entering(tcp)) {
825		tprintf("%ld, %ld, %ld, ", tcp->u_arg[0], tcp->u_arg[1],
826			tcp->u_arg[2]);
827	} else {
828		if (tcp->u_rval == 0) {
829			tprintf("{}");
830		} else  {
831#ifdef HAVE_LIBAIO_H
832			struct io_event *events = (void *)tcp->u_arg[3];
833			long i, nr = tcp->u_rval;
834
835			for (i = 0; i < nr; i++, events++) {
836				struct io_event event;
837
838				if (i == 0)
839					tprintf("{");
840				else
841					tprintf(", ");
842
843				if (umove(tcp, (unsigned long)events, &event) != 0) {
844					tprintf("{...}");
845					continue;
846				}
847				tprintf("{%p, %p, %ld, %ld}", event.data,
848					event.obj, event.res, event.res2);
849			}
850			tprintf("}, ");
851#else
852				tprintf("{...}");
853#endif
854		}
855
856		if (tcp->u_arg[4] == 0)
857			tprintf("NULL");
858		else {
859			struct timespec to;
860			if (umove(tcp, tcp->u_arg[4], &to) == 0)
861				tprintf("{%lu, %lu}", to.tv_sec, to.tv_nsec);
862			else
863				tprintf("{...}");
864		}
865	}
866	return 0;
867}
868#endif /* LINUX */
869
870int
871sys_select(tcp)
872struct tcb *tcp;
873{
874	long *args = tcp->u_arg;
875	return decode_select(tcp, args, 0);
876}
877