xref: /netbsd-src/usr.bin/ktruss/dump.c (revision 2980e352a13e8f0b545a366830c411e7a542ada8) 
1 /*	$NetBSD: dump.c,v 1.29 2008/07/21 14:19:23 lukem 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 1.29 2008/07/21 14:19:23 lukem 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 > KTRFACv0)
354 		wprintf("%6d ", kth->ktr_lid);
355 	wprintf("%-8.*s ", MAXCOMLEN, kth->ktr_comm);
356 	if (timestamp) {
357 		if (timestamp == 2) {
358 			if (kth->ktr_version == KTRFACv0) {
359 				if (prevtime.tv.tv_sec == 0)
360 					temp.tv.tv_sec = temp.tv.tv_usec = 0;
361 				else
362 					timersub(&kth->ktr_tv,
363 					    &prevtime.tv, &temp.tv);
364 				prevtime.tv = kth->ktr_tv;
365 			} else {
366 				if (prevtime.ts.tv_sec == 0)
367 					temp.ts.tv_sec = temp.ts.tv_nsec = 0;
368 				else
369 					timespecsub(&kth->ktr_time,
370 					    &prevtime.ts, &temp.ts);
371 				prevtime.ts = kth->ktr_time;
372 			}
373 		} else {
374 			if (kth->ktr_version == KTRFACv0)
375 				temp.tv = kth->ktr_tv;
376 			else
377 				temp.ts = kth->ktr_time;
378 		}
379 		if (kth->ktr_version == KTRFACv0)
380 			wprintf("%ld.%06ld ",
381 			    (long)temp.tv.tv_sec, (long)temp.tv.tv_usec);
382 		else
383 			wprintf("%ld.%09ld ",
384 			    (long)temp.ts.tv_sec, (long)temp.ts.tv_nsec);
385 	}
386 }
387 
388 void
389 ioctldecode(u_long cmd)
390 {
391 	char dirbuf[4], *dir = dirbuf;
392 
393 	if (cmd & IOC_OUT)
394 		*dir++ = 'W';
395 	if (cmd & IOC_IN)
396 		*dir++ = 'R';
397 	*dir = '\0';
398 
399 	wprintf(decimal ? ", _IO%s('%c',%ld" : ", _IO%s('%c',%#lx",
400 	    dirbuf, (int) ((cmd >> 8) & 0xff), cmd & 0xff);
401 	if ((cmd & IOC_VOID) == 0)
402 		wprintf(decimal ? ",%ld)" : ",%#lx)",
403 		    (cmd >> 16) & 0xff);
404 	else
405 		wprintf(")");
406 }
407 
408 void
409 nameiargprint(const char *prefix, struct ktr_header *kth,
410     register_t **ap, int *argsize)
411 {
412 	struct ktr_entry *kte;
413 
414 	if (*argsize == 0)
415 		errx(EXIT_FAILURE, "argument expected");
416 	/*
417 	 * XXX: binary emulation mode.
418 	 */
419 	kte = getpendq(kth, KTR_NAMEI, NULL);
420 	if (kte == NULL)
421 		argprint(prefix, ap, argsize);
422 	else {
423 		wprintf("%s", prefix);
424 		nameiprint(&kte->kte_kth);
425 		free(kte);
426 		(*ap)++;
427 		*argsize -= sizeof(register_t);
428 	}
429 }
430 
431 void
432 syscallnameprint(int code)
433 {
434 
435 	if (code >= cur_emul->nsysnames || code < 0)
436 		wprintf("[%d]", code);
437 	else
438 		wprintf("%s", cur_emul->sysnames[code]);
439 }
440 
441 void
442 argprint(const char *prefix, register_t **ap, int *argsize)
443 {
444 
445 	if (decimal)
446 		wprintf("%s%ld", prefix, (long)**ap);
447 	else
448 		wprintf("%s%#lx", prefix, (long)**ap);
449 	(*ap)++;
450 	*argsize -= sizeof(register_t);
451 }
452 
453 void
454 syscallprint(struct ktr_header *kth)
455 {
456 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
457 	register_t *ap;
458 	const char *s;
459 	int argsize;
460 
461 	syscallnameprint(ktr->ktr_code);
462 
463 	/*
464 	 * Arguments processing.
465 	 */
466 	argsize = ktr->ktr_argsize;
467 	if (argsize == 0) {
468 		wprintf("(");
469 		goto noargument;
470 	}
471 
472 	ap = (register_t *)(ktr + 1);
473 	if (!fancy)
474 		goto print_first;
475 
476 	switch (ktr->ktr_code) {
477 	/*
478 	 * All these have a path as the first param.
479 	 * The order is same as syscalls.master.
480 	 */
481 	case SYS_open:
482 	case SYS_link:
483 	case SYS_unlink:
484 	case SYS_chdir:
485 	case SYS_mknod:
486 	case SYS_chmod:
487 	case SYS_chown:
488 	case SYS_unmount:
489 	case SYS_access:
490 	case SYS_chflags:
491 	case SYS_acct:
492 	case SYS_revoke:
493 	case SYS_symlink:
494 	case SYS_readlink:
495 	case SYS_execve:
496 	case SYS_chroot:
497 	case SYS_rename:
498 	case SYS_mkfifo:
499 	case SYS_mkdir:
500 	case SYS_rmdir:
501 	case SYS_utimes:
502 	case SYS_quotactl:
503 	case SYS_statvfs1:
504 	case SYS_compat_30_getfh:
505 	case SYS_pathconf:
506 	case SYS_truncate:
507 	case SYS_undelete:
508 	case SYS___posix_rename:
509 	case SYS_lchmod:
510 	case SYS_lchown:
511 	case SYS_lutimes:
512 	case SYS___stat30:
513 	case SYS___lstat30:
514 	case SYS___posix_chown:
515 	case SYS___posix_lchown:
516 	case SYS_lchflags:
517 	case SYS___getfh30:
518 		nameiargprint("(", kth, &ap, &argsize);
519 
520 		/*
521 		 * 2nd argument is also pathname.
522 		 */
523 		switch (ktr->ktr_code) {
524 		case SYS_link:
525 		case SYS_rename:
526 		case SYS___posix_rename:
527 			nameiargprint(", ", kth, &ap, &argsize);
528 			break;
529 		}
530 		break;
531 
532 	case SYS_compat_16___sigaction14 :
533 		wprintf("(%s", signals[(int)*ap].name);
534 		ap++;
535 		argsize -= sizeof(register_t);
536 		break;
537 
538 	case SYS_ioctl :
539 		argprint("(", &ap, &argsize);
540 		if ((s = ioctlname(*ap)) != NULL)
541 			wprintf(", %s", s);
542 		else
543 			ioctldecode(*ap);
544 		ap++;
545 		argsize -= sizeof(register_t);
546 		break;
547 
548 	case SYS_ptrace :
549 		if ((long)*ap >= 0 &&
550 		    *ap < sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
551 			wprintf("(%s", ptrace_ops[*ap]);
552 		else
553 			wprintf("(%ld", (long)*ap);
554 		ap++;
555 		argsize -= sizeof(register_t);
556 		break;
557 
558 	default:
559 print_first:
560 		argprint("(", &ap, &argsize);
561 		break;
562 	}
563 
564 	/* Print rest of argument. */
565 	while (argsize > 0)
566 		argprint(", ", &ap, &argsize);
567 
568 noargument:
569 	wprintf(")");
570 }
571 
572 void
573 ktrsyscall(struct ktr_entry *kte)
574 {
575 	struct ktr_header *kth = &kte->kte_kth;
576 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
577 
578 	switch (ktr->ktr_code) {
579 	case SYS_exit:
580 		dumpheader(kth);
581 		syscallprint(kth);
582 		break;
583 	default:
584 		putpendq(kte);
585 		return;
586 	}
587 
588 	free(kte);
589 }
590 
591 void
592 sysretprint(struct ktr_header *kth)
593 {
594 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
595 	register_t ret = ktr->ktr_retval;
596 	int error = ktr->ktr_error;
597 
598 	indent(50);
599 	if (error == EJUSTRETURN)
600 		wprintf(" JUSTRETURN");
601 	else if (error == ERESTART)
602 		wprintf(" RESTART");
603 	else if (error) {
604 		wprintf(" Err#%d", error);
605 		if (error < MAXERRNOS && error >= -2)
606 			wprintf(" %s", errnos[error].name);
607 	} else
608 		switch (ktr->ktr_code) {
609 		case SYS_mmap:
610 			wprintf(" = %p", (long)ret);
611 			break;
612 		default:
613 			wprintf(" = %ld", (long)ret);
614 			if (kth->ktr_len > offsetof(struct ktr_sysret,
615 			    ktr_retval_1) && ktr->ktr_retval_1 != 0)
616 				wprintf(", %ld", (long)ktr->ktr_retval_1);
617 			break;
618 		}
619 }
620 
621 void
622 ktrsysret(struct ktr_entry *kte)
623 {
624 	struct ktr_header *kth = &kte->kte_kth;
625 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
626 	struct ktr_entry *genio;
627 	struct ktr_entry *syscall_ent;
628 
629 	dumpheader(kth);
630 
631 	/* Print syscall name and arguments. */
632 	syscall_ent = getpendq(kth, KTR_SYSCALL, NULL);
633 	if (syscall_ent == NULL) {
634 		/*
635 		 * Possibilly a child of fork/vfork, or tracing of
636 		 * process started during system call.
637 		 */
638 		syscallnameprint(ktr->ktr_code);
639 	} else {
640 		syscallprint(&syscall_ent->kte_kth);
641 		free(syscall_ent);
642 	}
643 
644 	/* Print return value and an error if any. */
645 	sysretprint(kth);
646 
647 	genio = getpendq(kth, KTR_GENIO, NULL);
648 	if (genio != NULL) {
649 		genioprint(&genio->kte_kth);
650 		free(genio);
651 	}
652 
653 #if 0 /* Why? */
654 	flushpendq(kte);
655 #endif
656 	free(kte);
657 }
658 
659 void
660 nameiprint(struct ktr_header *kth)
661 {
662 
663 	wprintf("\"%.*s\"", kth->ktr_len, (char *)(kth + 1));
664 }
665 
666 #ifdef notused
667 void
668 ktrnamei(struct ktr_entry *kte)
669 {
670 	struct ktr_header *kth = &kte->kte_kth;
671 
672 	dumpheader(kth);
673 	wprintf("namei(");
674 	nameiprint(kth);
675 	wprintf(")");
676 
677 	free(kte);
678 }
679 #endif
680 
681 void
682 ktremul(struct ktr_entry *kte)
683 {
684 	struct ktr_header *kth = &kte->kte_kth;
685 	char *emul = (char *)(kth + 1);
686 
687 	dumpheader(kth);
688 	wprintf("emul(%s)", emul);
689 	setemul(emul, kth->ktr_pid, 1);
690 
691 	free(kte);
692 }
693 
694 void
695 genioprint(struct ktr_header *kth)
696 {
697 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
698 	static int screenwidth = 0;
699 	int datalen = kth->ktr_len - sizeof(struct ktr_genio);
700 	/*
701 	 * Need to be unsigned type so that positive value is passed
702 	 * to vis(), which will call isgraph().
703 	 */
704 	unsigned char *dp = (unsigned char *)(ktr + 1);
705 	int w;
706 	char visbuf[5];
707 
708 	if (screenwidth == 0) {
709 		struct winsize ws;
710 
711 		if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
712 		    ws.ws_col > 8)
713 			screenwidth = ws.ws_col;
714 		else
715 			screenwidth = 80;
716 	}
717 
718 	if (maxdata && datalen > maxdata)
719 		datalen = maxdata;
720 	newline();
721 	wprintf("       \"");
722 	for (; datalen > 0; datalen--, dp++) {
723 		(void) vis(visbuf, *dp, VIS_NL|VIS_TAB|VIS_CSTYLE,
724 		    /* We put NUL at the end of buffer when reading */
725 		    *(dp + 1));
726 		visbuf[4] = '\0';
727 		w = strlen(visbuf);
728 		if (width + w + 2 >= screenwidth)
729 			break;
730 		wprintf("%s", visbuf);
731 		if (width + 2 >= screenwidth)
732 			break;
733 	}
734 	wprintf("\"");
735 }
736 
737 #ifdef notused
738 void
739 ktrgenio(struct ktr_entry *kte)
740 {
741 	struct ktr_header *kth = &kte->kte_kth;
742 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
743 
744 	dumpheader(kth);
745 	wprintf("genio fd %d %s",
746 	    ktr->ktr_fd, ktr->ktr_rw ? "write" : "read");
747 	genioprint(kth);
748 
749 	free(kte);
750 }
751 #endif
752 
753 void
754 ktrpsig(struct ktr_entry *kte)
755 {
756 	struct ktr_header *kth = &kte->kte_kth;
757 	struct ktr_psig *psig = (struct ktr_psig *)(kth + 1);
758 
759 	dumpheader(kth);
760 	wprintf("SIG%s ", sys_signame[psig->signo]);
761 	if (psig->action == SIG_DFL)
762 		wprintf("SIG_DFL");
763 	else {
764 		wprintf("caught handler=0x%lx mask=0x%lx code=0x%x",
765 		    (u_long)psig->action, (unsigned long)psig->mask.__bits[0],
766 		    psig->code);
767 	}
768 
769 	free(kte);
770 }
771 
772 void
773 ktrcsw(struct ktr_entry *kte)
774 {
775 	struct ktr_header *kth = &kte->kte_kth;
776 	struct ktr_csw *cs = (struct ktr_csw *)(kth + 1);
777 
778 	dumpheader(kth);
779 	wprintf("%s %s", cs->out ? "stop" : "resume",
780 	    cs->user ? "user" : "kernel");
781 
782 	free(kte);
783 }
784