xref: /netbsd-src/usr.bin/ktruss/dump.c (revision 404fbe5fb94ca1e054339640cabb2801ce52dd30) 
1 /*	$NetBSD: dump.c,v 1.32 2009/01/11 03:05:23 christos Exp $	*/
2 
3 /*-
4  * Copyright (c) 1988, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. Neither the name of the University nor the names of its contributors
16  *    may be used to endorse or promote products derived from this software
17  *    without specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29  * SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
33 #ifndef lint
34 __COPYRIGHT("@(#) Copyright (c) 1988, 1993\
35  The Regents of the University of California.  All rights reserved.");
36 #endif /* not lint */
37 
38 #ifndef lint
39 #if 0
40 static char sccsid[] = "@(#)kdump.c	8.4 (Berkeley) 4/28/95";
41 #endif
42 __RCSID("$NetBSD: dump.c,v 1.32 2009/01/11 03:05:23 christos Exp $");
43 #endif /* not lint */
44 
45 #include <sys/param.h>
46 #define	_KERNEL
47 #include <sys/errno.h>
48 #undef _KERNEL
49 #include <sys/ioctl.h>
50 #include <sys/time.h>
51 #include <sys/uio.h>
52 #include <sys/ktrace.h>
53 #include <sys/ptrace.h>
54 #include <sys/queue.h>
55 
56 #include <err.h>
57 #include <signal.h>
58 #include <stdarg.h>
59 #include <stddef.h>
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <unistd.h>
64 #include <vis.h>
65 
66 #include "ktrace.h"
67 #include "misc.h"
68 #include "setemul.h"
69 
70 int timestamp, decimal, fancy = 1, tail, maxdata;
71 
72 int width;			/* Keep track of current columns. */
73 
74 #include <sys/syscall.h>
75 
76 static const char *const ptrace_ops[] = {
77 	"PT_TRACE_ME",	"PT_READ_I",	"PT_READ_D",	"PT_READ_U",
78 	"PT_WRITE_I",	"PT_WRITE_D",	"PT_WRITE_U",	"PT_CONTINUE",
79 	"PT_KILL",	"PT_ATTACH",	"PT_DETACH",
80 };
81 
82 struct ktr_entry {
83 	TAILQ_ENTRY(ktr_entry) kte_list;
84 	struct ktr_header kte_kth;
85 };
86 
87 TAILQ_HEAD(kteq, ktr_entry) ktependq = TAILQ_HEAD_INITIALIZER(ktependq);
88 
89 void	argprint(const char *, register_t **, int *);
90 void	dumpheader(struct ktr_header *);
91 int	dumprecord(int, FILE *);
92 void	flushpendq(struct ktr_entry *);
93 int	fread_tail(void *, int, int, FILE *);
94 void	genioprint(struct ktr_header *);
95 struct ktr_entry *
96 	getpendq(struct ktr_header *, int, struct kteq *);
97 struct ktr_entry *
98 	getrecord(FILE *);
99 void	indent(int);
100 void	ioctldecode(u_long);
101 void	ktrcsw(struct ktr_entry *);
102 void	ktremul(struct ktr_entry *);
103 void	ktrgenio(struct ktr_entry *);
104 void	ktrnamei(struct ktr_entry *);
105 void	ktrpsig(struct ktr_entry *);
106 void	ktrsyscall(struct ktr_entry *);
107 void	ktrsysret(struct ktr_entry *);
108 void	nameiargprint(const char *, struct ktr_header *, register_t **, int *);
109 void	nameiprint(struct ktr_header *);
110 void	newline(void);
111 void	putpendq(struct ktr_entry *);
112 void	syscallnameprint(int);
113 void	syscallprint(struct ktr_header *);
114 void	sysretprint(struct ktr_header *);
115 int	wprintf(const char *, ...);
116 void	*xrealloc(void *, size_t *, size_t);
117 
118 int
119 wprintf(const char *fmt, ...)
120 {
121 	va_list ap;
122 	int w;
123 
124 	va_start(ap, fmt);
125 	w = vprintf(fmt, ap);
126 	if (w == -1)
127 		warn("vprintf");
128 	else
129 		width += w;
130 	va_end(ap);
131 	return (w);
132 }
133 
134 void
135 newline(void)
136 {
137 
138 	if (width > 0) {
139 		printf("\n");
140 		width = 0;
141 	}
142 }
143 
144 void
145 indent(int col)
146 {
147 
148 	while (width < col)
149 		if (wprintf(" ") < 0)
150 			break;
151 }
152 
153 void *
154 xrealloc(void *p, size_t *siz, size_t req)
155 {
156 
157 	if (*siz < req) {
158 		if (*siz == 0)
159 			*siz = 1;
160 		while (*siz < req)
161 			*siz <<= 1;
162 		p = realloc(p, *siz);
163 		if (p == NULL)
164 			err(EXIT_FAILURE, "realloc: %lu bytes",
165 			    (u_long)*siz);
166 	}
167 	return (p);
168 }
169 
170 struct ktr_entry *
171 getrecord(FILE *fp)
172 {
173 	struct ktr_entry *kte;
174 	struct ktr_header *kth;
175 	char *cp;
176 	size_t siz, len;
177 
178 	siz = 0;
179 	kte = xrealloc(NULL, &siz, sizeof(struct ktr_entry));
180 	kth = &kte->kte_kth;
181 	if (fread_tail(kth, sizeof(struct ktr_header), 1, fp) == 0) {
182 		free(kte);
183 		return (NULL);
184 	}
185 
186 	if (kth->ktr_len < 0)
187 		errx(EXIT_FAILURE, "bogus length 0x%x", kth->ktr_len);
188 	len = kth->ktr_len;
189 	if (len > 0) {
190 		/* + 1 to ensure room for NUL terminate */
191 		kte = xrealloc(kte, &siz, sizeof(struct ktr_entry) + len + 1);
192 		if (fread_tail(cp = (char *)(&kte->kte_kth + 1),
193 		    len, 1, fp) == 0)
194 			errx(EXIT_FAILURE, "data too short");
195 		cp[len] = 0;
196 	}
197 
198 	return (kte);
199 }
200 
201 #define	KTE_TYPE(kte)		((kte)->kte_kth.ktr_type)
202 #define	KTE_PID(kte)		((kte)->kte_kth.ktr_pid)
203 #define	KTE_LID(kte)		((kte)->kte_kth.ktr_lid)
204 #define	KTE_MATCH(kte, type, pid, lid)				\
205 	(KTE_TYPE(kte) == (type) && KTE_PID(kte) == (pid) &&	\
206 	KTE_LID(kte) == (lid))
207 
208 void
209 putpendq(struct ktr_entry *kte)
210 {
211 
212 	TAILQ_INSERT_TAIL(&ktependq, kte, kte_list);
213 }
214 
215 void
216 flushpendq(struct ktr_entry *us)
217 {
218 	struct ktr_entry *kte, *kte_next;
219 	int pid = KTE_PID(us);
220 
221 	for (kte = TAILQ_FIRST(&ktependq); kte != NULL; kte = kte_next) {
222 		kte_next = TAILQ_NEXT(kte, kte_list);
223 		if (KTE_PID(kte) == pid) {
224 			TAILQ_REMOVE(&ktependq, kte, kte_list);
225 			free(kte);
226 		}
227 	}
228 }
229 
230 struct ktr_entry *
231 getpendq(struct ktr_header *us, int type, struct kteq *kteq)
232 {
233 	struct ktr_entry *kte, *kte_next;
234 	int pid = us->ktr_pid, lid = us->ktr_lid;
235 
236 	if (kteq != NULL)
237 		TAILQ_INIT(kteq);
238 	for (kte = TAILQ_FIRST(&ktependq); kte != NULL; kte = kte_next) {
239 		kte_next = TAILQ_NEXT(kte, kte_list);
240 		if (KTE_MATCH(kte, type, pid, lid)) {
241 			TAILQ_REMOVE(&ktependq, kte, kte_list);
242 			if (kteq != NULL)
243 				TAILQ_INSERT_TAIL(kteq, kte, kte_list);
244 			else
245 				break;
246 		}
247 	}
248 
249 	return (kteq ? TAILQ_FIRST(kteq) : kte);
250 }
251 
252 int
253 dumprecord(int trpoints, FILE *fp)
254 {
255 	struct ktr_entry *kte;
256 	struct ktr_header *kth;
257 
258 	kte = getrecord(fp);
259 	if (kte == NULL)
260 		return (0);
261 
262 	kth = &kte->kte_kth;
263 	if ((trpoints & (1 << kth->ktr_type)) == 0) {
264 		free(kte);
265 		goto out;
266 	}
267 
268 	/* Update context to match currently processed record. */
269 	ectx_sanify(kth->ktr_pid);
270 
271 	switch (kth->ktr_type) {
272 	case KTR_SYSCALL:
273 		ktrsyscall(kte);
274 		break;
275 	case KTR_SYSRET:
276 		ktrsysret(kte);
277 		break;
278 	case KTR_NAMEI:
279 		putpendq(kte);
280 		break;
281 	case KTR_GENIO:
282 		putpendq(kte);
283 		break;
284 	case KTR_PSIG:
285 		ktrpsig(kte);
286 		break;
287 	case KTR_CSW:
288 		ktrcsw(kte);
289 		break;
290 	case KTR_EMUL:
291 		ktremul(kte);
292 		break;
293 	default:
294 		/*
295 		 * XXX: Other types added recently.
296 		 */
297 		free(kte);
298 		break;
299 	}
300 	newline();
301 
302 out:
303 	return (1);
304 }
305 
306 void
307 dumpfile(const char *file, int fd, int trpoints)
308 {
309 	FILE *fp;
310 
311 	if (file == NULL || *file == 0) {
312 		if ((fp = fdopen(fd, "r")) == NULL)
313 			err(EXIT_FAILURE, "fdopen(%d)", fd);
314 	} else if (strcmp(file, "-") == 0)
315 		fp = stdin;
316 	else if ((fp = fopen(file, "r")) == NULL)
317 		err(EXIT_FAILURE, "fopen: %s", file);
318 
319 	for (width = 0; dumprecord(trpoints, fp) != 0;)
320 		if (tail)
321 			(void)fflush(stdout);
322 
323 	newline();
324 
325 	/*
326 	 * XXX: Dump pending KTR_SYSCALL if any?
327 	 */
328 }
329 
330 int
331 fread_tail(void *buf, int size, int num, FILE *fp)
332 {
333 	int i;
334 
335 	while ((i = fread(buf, size, num, fp)) == 0 && tail) {
336 		(void)sleep(1);
337 		clearerr(fp);
338 	}
339 	return (i);
340 }
341 
342 void
343 dumpheader(struct ktr_header *kth)
344 {
345 	union timeholder {
346 		struct timeval tv;
347 		struct timespec ts;
348 	};
349 	static union timeholder prevtime;
350 	union timeholder temp;
351 
352 	wprintf("%6d ", kth->ktr_pid);
353 	if (kth->ktr_version > KTRFAC_VERSION(KTRFACv0))
354 		wprintf("%6d ", kth->ktr_lid);
355 	wprintf("%-8.*s ", MAXCOMLEN, kth->ktr_comm);
356 	if (timestamp) {
357 		if (timestamp == 2) {
358 			switch (kth->ktr_version) {
359 			case KTRFAC_VERSION(KTRFACv0):
360 				if (prevtime.tv.tv_sec == 0)
361 					temp.tv.tv_sec = temp.tv.tv_usec = 0;
362 				else
363 					timersub(&kth->ktr_otv,
364 					    &prevtime.tv, &temp.tv);
365 				prevtime.tv.tv_sec = kth->ktr_otv.tv_sec;
366 				prevtime.tv.tv_usec = kth->ktr_otv.tv_usec;
367 				break;
368 
369 			case KTRFAC_VERSION(KTRFACv1):
370 				if (prevtime.ts.tv_sec == 0)
371 					temp.ts.tv_sec = temp.ts.tv_nsec = 0;
372 				else
373 					timespecsub(&kth->ktr_time,
374 					    &prevtime.ts, &temp.ts);
375 				prevtime.ts.tv_sec = kth->ktr_ots.tv_sec;
376 				prevtime.ts.tv_nsec = kth->ktr_ots.tv_nsec;
377 				break;
378 
379 			case KTRFAC_VERSION(KTRFACv2):
380 				if (prevtime.ts.tv_sec == 0)
381 					temp.ts.tv_sec = temp.ts.tv_nsec = 0;
382 				else
383 					timespecsub(&kth->ktr_time,
384 					    &prevtime.ts, &temp.ts);
385 				prevtime.ts.tv_sec = kth->ktr_ts.tv_sec;
386 				prevtime.ts.tv_nsec = kth->ktr_ts.tv_nsec;
387 				break;
388 			}
389 		} else {
390 			switch (kth->ktr_version) {
391 			case KTRFAC_VERSION(KTRFACv0):
392 				temp.tv.tv_sec = kth->ktr_otv.tv_sec;
393 				temp.tv.tv_usec = kth->ktr_otv.tv_usec;
394 				break;
395 			case KTRFAC_VERSION(KTRFACv1):
396 				temp.ts.tv_sec = kth->ktr_ots.tv_sec;
397 				temp.ts.tv_nsec = kth->ktr_ots.tv_nsec;
398 				break;
399 			case KTRFAC_VERSION(KTRFACv2):
400 				temp.ts.tv_sec = kth->ktr_ts.tv_sec;
401 				temp.ts.tv_nsec = kth->ktr_ts.tv_nsec;
402 				break;
403 			}
404 		}
405 		if (kth->ktr_version == KTRFAC_VERSION(KTRFACv0))
406 			wprintf("%lld.%06ld ",
407 			    (long long)temp.tv.tv_sec, (long)temp.tv.tv_usec);
408 		else
409 			wprintf("%lld.%09ld ",
410 			    (long long)temp.ts.tv_sec, (long)temp.ts.tv_nsec);
411 	}
412 }
413 
414 void
415 ioctldecode(u_long cmd)
416 {
417 	char dirbuf[4], *dir = dirbuf;
418 
419 	if (cmd & IOC_OUT)
420 		*dir++ = 'W';
421 	if (cmd & IOC_IN)
422 		*dir++ = 'R';
423 	*dir = '\0';
424 
425 	wprintf(decimal ? ", _IO%s('%c',%ld" : ", _IO%s('%c',%#lx",
426 	    dirbuf, (int) ((cmd >> 8) & 0xff), cmd & 0xff);
427 	if ((cmd & IOC_VOID) == 0)
428 		wprintf(decimal ? ",%ld)" : ",%#lx)",
429 		    (cmd >> 16) & 0xff);
430 	else
431 		wprintf(")");
432 }
433 
434 void
435 nameiargprint(const char *prefix, struct ktr_header *kth,
436     register_t **ap, int *argsize)
437 {
438 	struct ktr_entry *kte;
439 
440 	if (*argsize == 0)
441 		errx(EXIT_FAILURE, "argument expected");
442 	/*
443 	 * XXX: binary emulation mode.
444 	 */
445 	kte = getpendq(kth, KTR_NAMEI, NULL);
446 	if (kte == NULL)
447 		argprint(prefix, ap, argsize);
448 	else {
449 		wprintf("%s", prefix);
450 		nameiprint(&kte->kte_kth);
451 		free(kte);
452 		(*ap)++;
453 		*argsize -= sizeof(register_t);
454 	}
455 }
456 
457 void
458 syscallnameprint(int code)
459 {
460 
461 	if (code >= cur_emul->nsysnames || code < 0)
462 		wprintf("[%d]", code);
463 	else
464 		wprintf("%s", cur_emul->sysnames[code]);
465 }
466 
467 void
468 argprint(const char *prefix, register_t **ap, int *argsize)
469 {
470 
471 	if (decimal)
472 		wprintf("%s%ld", prefix, (long)**ap);
473 	else
474 		wprintf("%s%#lx", prefix, (long)**ap);
475 	(*ap)++;
476 	*argsize -= sizeof(register_t);
477 }
478 
479 void
480 syscallprint(struct ktr_header *kth)
481 {
482 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
483 	register_t *ap;
484 	const char *s;
485 	int argsize;
486 
487 	syscallnameprint(ktr->ktr_code);
488 
489 	/*
490 	 * Arguments processing.
491 	 */
492 	argsize = ktr->ktr_argsize;
493 	if (argsize == 0) {
494 		wprintf("(");
495 		goto noargument;
496 	}
497 
498 	ap = (register_t *)(ktr + 1);
499 	if (!fancy)
500 		goto print_first;
501 
502 	switch (ktr->ktr_code) {
503 	/*
504 	 * All these have a path as the first param.
505 	 * The order is same as syscalls.master.
506 	 */
507 	case SYS_open:
508 	case SYS_link:
509 	case SYS_unlink:
510 	case SYS_chdir:
511 	case SYS___mknod50:
512 	case SYS_chmod:
513 	case SYS_chown:
514 	case SYS_unmount:
515 	case SYS_access:
516 	case SYS_chflags:
517 	case SYS_acct:
518 	case SYS_revoke:
519 	case SYS_symlink:
520 	case SYS_readlink:
521 	case SYS_execve:
522 	case SYS_chroot:
523 	case SYS_rename:
524 	case SYS_mkfifo:
525 	case SYS_mkdir:
526 	case SYS_rmdir:
527 	case SYS___utimes50:
528 	case SYS_quotactl:
529 	case SYS_statvfs1:
530 	case SYS_compat_30_getfh:
531 	case SYS_pathconf:
532 	case SYS_truncate:
533 	case SYS_undelete:
534 	case SYS___posix_rename:
535 	case SYS_lchmod:
536 	case SYS_lchown:
537 	case SYS___lutimes50:
538 	case SYS___stat50:
539 	case SYS___lstat50:
540 	case SYS___posix_chown:
541 	case SYS___posix_lchown:
542 	case SYS_lchflags:
543 	case SYS___getfh30:
544 		nameiargprint("(", kth, &ap, &argsize);
545 
546 		/*
547 		 * 2nd argument is also pathname.
548 		 */
549 		switch (ktr->ktr_code) {
550 		case SYS_link:
551 		case SYS_rename:
552 		case SYS___posix_rename:
553 			nameiargprint(", ", kth, &ap, &argsize);
554 			break;
555 		}
556 		break;
557 
558 	case SYS_compat_16___sigaction14 :
559 		wprintf("(%s", signals[(int)*ap].name);
560 		ap++;
561 		argsize -= sizeof(register_t);
562 		break;
563 
564 	case SYS_ioctl :
565 		argprint("(", &ap, &argsize);
566 		if ((s = ioctlname(*ap)) != NULL)
567 			wprintf(", %s", s);
568 		else
569 			ioctldecode(*ap);
570 		ap++;
571 		argsize -= sizeof(register_t);
572 		break;
573 
574 	case SYS_ptrace :
575 		if ((long)*ap >= 0 &&
576 		    *ap < sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
577 			wprintf("(%s", ptrace_ops[*ap]);
578 		else
579 			wprintf("(%ld", (long)*ap);
580 		ap++;
581 		argsize -= sizeof(register_t);
582 		break;
583 
584 	default:
585 print_first:
586 		argprint("(", &ap, &argsize);
587 		break;
588 	}
589 
590 	/* Print rest of argument. */
591 	while (argsize > 0)
592 		argprint(", ", &ap, &argsize);
593 
594 noargument:
595 	wprintf(")");
596 }
597 
598 void
599 ktrsyscall(struct ktr_entry *kte)
600 {
601 	struct ktr_header *kth = &kte->kte_kth;
602 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
603 
604 	switch (ktr->ktr_code) {
605 	case SYS_exit:
606 		dumpheader(kth);
607 		syscallprint(kth);
608 		break;
609 	default:
610 		putpendq(kte);
611 		return;
612 	}
613 
614 	free(kte);
615 }
616 
617 void
618 sysretprint(struct ktr_header *kth)
619 {
620 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
621 	register_t ret = ktr->ktr_retval;
622 	int error = ktr->ktr_error;
623 
624 	indent(50);
625 	if (error == EJUSTRETURN)
626 		wprintf(" JUSTRETURN");
627 	else if (error == ERESTART)
628 		wprintf(" RESTART");
629 	else if (error) {
630 		wprintf(" Err#%d", error);
631 		if (error < MAXERRNOS && error >= -2)
632 			wprintf(" %s", errnos[error].name);
633 	} else
634 		switch (ktr->ktr_code) {
635 		case SYS_mmap:
636 			wprintf(" = %p", (long)ret);
637 			break;
638 		default:
639 			wprintf(" = %ld", (long)ret);
640 			if (kth->ktr_len > offsetof(struct ktr_sysret,
641 			    ktr_retval_1) && ktr->ktr_retval_1 != 0)
642 				wprintf(", %ld", (long)ktr->ktr_retval_1);
643 			break;
644 		}
645 }
646 
647 void
648 ktrsysret(struct ktr_entry *kte)
649 {
650 	struct ktr_header *kth = &kte->kte_kth;
651 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
652 	struct ktr_entry *genio;
653 	struct ktr_entry *syscall_ent;
654 
655 	dumpheader(kth);
656 
657 	/* Print syscall name and arguments. */
658 	syscall_ent = getpendq(kth, KTR_SYSCALL, NULL);
659 	if (syscall_ent == NULL) {
660 		/*
661 		 * Possibilly a child of fork/vfork, or tracing of
662 		 * process started during system call.
663 		 */
664 		syscallnameprint(ktr->ktr_code);
665 	} else {
666 		syscallprint(&syscall_ent->kte_kth);
667 		free(syscall_ent);
668 	}
669 
670 	/* Print return value and an error if any. */
671 	sysretprint(kth);
672 
673 	genio = getpendq(kth, KTR_GENIO, NULL);
674 	if (genio != NULL) {
675 		genioprint(&genio->kte_kth);
676 		free(genio);
677 	}
678 
679 #if 0 /* Why? */
680 	flushpendq(kte);
681 #endif
682 	free(kte);
683 }
684 
685 void
686 nameiprint(struct ktr_header *kth)
687 {
688 
689 	wprintf("\"%.*s\"", kth->ktr_len, (char *)(kth + 1));
690 }
691 
692 #ifdef notused
693 void
694 ktrnamei(struct ktr_entry *kte)
695 {
696 	struct ktr_header *kth = &kte->kte_kth;
697 
698 	dumpheader(kth);
699 	wprintf("namei(");
700 	nameiprint(kth);
701 	wprintf(")");
702 
703 	free(kte);
704 }
705 #endif
706 
707 void
708 ktremul(struct ktr_entry *kte)
709 {
710 	struct ktr_header *kth = &kte->kte_kth;
711 	char *emul = (char *)(kth + 1);
712 
713 	dumpheader(kth);
714 	wprintf("emul(%s)", emul);
715 	setemul(emul, kth->ktr_pid, 1);
716 
717 	free(kte);
718 }
719 
720 void
721 genioprint(struct ktr_header *kth)
722 {
723 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
724 	static int screenwidth = 0;
725 	int datalen = kth->ktr_len - sizeof(struct ktr_genio);
726 	/*
727 	 * Need to be unsigned type so that positive value is passed
728 	 * to vis(), which will call isgraph().
729 	 */
730 	unsigned char *dp = (unsigned char *)(ktr + 1);
731 	int w;
732 	char visbuf[5];
733 
734 	if (screenwidth == 0) {
735 		struct winsize ws;
736 
737 		if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
738 		    ws.ws_col > 8)
739 			screenwidth = ws.ws_col;
740 		else
741 			screenwidth = 80;
742 	}
743 
744 	if (maxdata && datalen > maxdata)
745 		datalen = maxdata;
746 	newline();
747 	wprintf("       \"");
748 	for (; datalen > 0; datalen--, dp++) {
749 		(void) vis(visbuf, *dp, VIS_NL|VIS_TAB|VIS_CSTYLE,
750 		    /* We put NUL at the end of buffer when reading */
751 		    *(dp + 1));
752 		visbuf[4] = '\0';
753 		w = strlen(visbuf);
754 		if (width + w + 2 >= screenwidth)
755 			break;
756 		wprintf("%s", visbuf);
757 		if (width + 2 >= screenwidth)
758 			break;
759 	}
760 	wprintf("\"");
761 }
762 
763 #ifdef notused
764 void
765 ktrgenio(struct ktr_entry *kte)
766 {
767 	struct ktr_header *kth = &kte->kte_kth;
768 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
769 
770 	dumpheader(kth);
771 	wprintf("genio fd %d %s",
772 	    ktr->ktr_fd, ktr->ktr_rw ? "write" : "read");
773 	genioprint(kth);
774 
775 	free(kte);
776 }
777 #endif
778 
779 void
780 ktrpsig(struct ktr_entry *kte)
781 {
782 	struct ktr_header *kth = &kte->kte_kth;
783 	struct ktr_psig *psig = (struct ktr_psig *)(kth + 1);
784 
785 	dumpheader(kth);
786 	wprintf("SIG%s ", sys_signame[psig->signo]);
787 	if (psig->action == SIG_DFL)
788 		wprintf("SIG_DFL");
789 	else {
790 		wprintf("caught handler=0x%lx mask=0x%lx code=0x%x",
791 		    (u_long)psig->action, (unsigned long)psig->mask.__bits[0],
792 		    psig->code);
793 	}
794 
795 	free(kte);
796 }
797 
798 void
799 ktrcsw(struct ktr_entry *kte)
800 {
801 	struct ktr_header *kth = &kte->kte_kth;
802 	struct ktr_csw *cs = (struct ktr_csw *)(kth + 1);
803 
804 	dumpheader(kth);
805 	wprintf("%s %s", cs->out ? "stop" : "resume",
806 	    cs->user ? "user" : "kernel");
807 
808 	free(kte);
809 }
810