Home | History | Annotate | Line # | Download | only in ktruss
dump.c revision 1.24 
      1 /*	$NetBSD: dump.c,v 1.24 2005/12/11 11:30:06 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\n\
     35 	The Regents of the University of California.  All rights reserved.\n");
     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 1.24 2005/12/11 11:30:06 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 	len = kth->ktr_len;
    187 	if (len < 0)
    188 		errx(EXIT_FAILURE, "bogus length 0x%lx", (long)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 /* XXX: lwp. */
    202 #define	KTE_TYPE(kte)		((kte)->kte_kth.ktr_type)
    203 #define	KTE_PID(kte)		((kte)->kte_kth.ktr_pid)
    204 #define	KTE_MATCH(kte, type, pid)				\
    205 	(KTE_TYPE(kte) == (type) && KTE_PID(kte) == (pid))
    206 
    207 void
    208 putpendq(struct ktr_entry *kte)
    209 {
    210 
    211 	TAILQ_INSERT_TAIL(&ktependq, kte, kte_list);
    212 }
    213 
    214 void
    215 flushpendq(struct ktr_entry *us)
    216 {
    217 	struct ktr_entry *kte, *kte_next;
    218 	int pid = KTE_PID(us);
    219 
    220 	for (kte = TAILQ_FIRST(&ktependq); kte != NULL; kte = kte_next) {
    221 		kte_next = TAILQ_NEXT(kte, kte_list);
    222 		if (KTE_PID(kte) == pid) {
    223 			TAILQ_REMOVE(&ktependq, kte, kte_list);
    224 			free(kte);
    225 		}
    226 	}
    227 }
    228 
    229 struct ktr_entry *
    230 getpendq(struct ktr_header *us, int type, struct kteq *kteq)
    231 {
    232 	struct ktr_entry *kte, *kte_next;
    233 	int pid = us->ktr_pid;
    234 
    235 	if (kteq != NULL)
    236 		TAILQ_INIT(kteq);
    237 	for (kte = TAILQ_FIRST(&ktependq); kte != NULL; kte = kte_next) {
    238 		kte_next = TAILQ_NEXT(kte, kte_list);
    239 		if (KTE_MATCH(kte, type, pid)) {
    240 			TAILQ_REMOVE(&ktependq, kte, kte_list);
    241 			if (kteq != NULL)
    242 				TAILQ_INSERT_TAIL(kteq, kte, kte_list);
    243 			else
    244 				break;
    245 		}
    246 	}
    247 
    248 	return (kteq ? TAILQ_FIRST(kteq) : kte);
    249 }
    250 
    251 int
    252 dumprecord(int trpoints, FILE *fp)
    253 {
    254 	struct ktr_entry *kte;
    255 	struct ktr_header *kth;
    256 
    257 	kte = getrecord(fp);
    258 	if (kte == NULL)
    259 		return (0);
    260 
    261 	kth = &kte->kte_kth;
    262 	if ((trpoints & (1 << kth->ktr_type)) == 0) {
    263 		free(kte);
    264 		goto out;
    265 	}
    266 
    267 	/* Update context to match currently processed record. */
    268 	ectx_sanify(kth->ktr_pid);
    269 
    270 	switch (kth->ktr_type) {
    271 	case KTR_SYSCALL:
    272 		ktrsyscall(kte);
    273 		break;
    274 	case KTR_SYSRET:
    275 		ktrsysret(kte);
    276 		break;
    277 	case KTR_NAMEI:
    278 		putpendq(kte);
    279 		break;
    280 	case KTR_GENIO:
    281 		putpendq(kte);
    282 		break;
    283 	case KTR_PSIG:
    284 		ktrpsig(kte);
    285 		break;
    286 	case KTR_CSW:
    287 		ktrcsw(kte);
    288 		break;
    289 	case KTR_EMUL:
    290 		ktremul(kte);
    291 		break;
    292 	default:
    293 		/*
    294 		 * XXX: Other types added recently.
    295 		 */
    296 		free(kte);
    297 		break;
    298 	}
    299 	newline();
    300 
    301 out:
    302 	return (1);
    303 }
    304 
    305 void
    306 dumpfile(const char *file, int fd, int trpoints)
    307 {
    308 	FILE *fp;
    309 
    310 	if (file == NULL || *file == 0) {
    311 		if ((fp = fdopen(fd, "r")) == NULL)
    312 			err(EXIT_FAILURE, "fdopen(%d)", fd);
    313 	} else if (strcmp(file, "-") == 0)
    314 		fp = stdin;
    315 	else if ((fp = fopen(file, "r")) == NULL)
    316 		err(EXIT_FAILURE, "fopen: %s", file);
    317 
    318 	for (width = 0; dumprecord(trpoints, fp) != 0;)
    319 		if (tail)
    320 			(void)fflush(stdout);
    321 
    322 	newline();
    323 
    324 	/*
    325 	 * XXX: Dump pending KTR_SYSCALL if any?
    326 	 */
    327 }
    328 
    329 int
    330 fread_tail(void *buf, int size, int num, FILE *fp)
    331 {
    332 	int i;
    333 
    334 	while ((i = fread(buf, size, num, fp)) == 0 && tail) {
    335 		(void)sleep(1);
    336 		clearerr(fp);
    337 	}
    338 	return (i);
    339 }
    340 
    341 void
    342 dumpheader(struct ktr_header *kth)
    343 {
    344 	union timeholder {
    345 		struct timeval tv;
    346 		struct timespec ts;
    347 	};
    348 	static union timeholder prevtime;
    349 	union timeholder temp;
    350 
    351 	wprintf("%6d ", kth->ktr_pid);
    352 	if (kth->ktr_version > KTRFACv0)
    353 		wprintf("%6d ", kth->ktr_lid);
    354 	wprintf("%-8.*s ", MAXCOMLEN, kth->ktr_comm);
    355 	if (timestamp) {
    356 		if (timestamp == 2) {
    357 			if (kth->ktr_version == KTRFACv0) {
    358 				if (prevtime.tv.tv_sec == 0)
    359 					temp.tv.tv_sec = temp.tv.tv_usec = 0;
    360 				else
    361 					timersub(&kth->ktr_tv,
    362 					    &prevtime.tv, &temp.tv);
    363 				prevtime.tv = kth->ktr_tv;
    364 			} else {
    365 				if (prevtime.ts.tv_sec == 0)
    366 					temp.ts.tv_sec = temp.ts.tv_nsec = 0;
    367 				else
    368 					timespecsub(&kth->ktr_time,
    369 					    &prevtime.ts, &temp.ts);
    370 				prevtime.ts = kth->ktr_time;
    371 			}
    372 		} else {
    373 			if (kth->ktr_version == KTRFACv0)
    374 				temp.tv = kth->ktr_tv;
    375 			else
    376 				temp.ts = kth->ktr_time;
    377 		}
    378 		if (kth->ktr_version == KTRFACv0)
    379 			wprintf("%ld.%06ld ",
    380 			    (long)temp.tv.tv_sec, (long)temp.tv.tv_usec);
    381 		else
    382 			wprintf("%ld.%09ld ",
    383 			    (long)temp.ts.tv_sec, (long)temp.ts.tv_nsec);
    384 	}
    385 }
    386 
    387 void
    388 ioctldecode(u_long cmd)
    389 {
    390 	char dirbuf[4], *dir = dirbuf;
    391 
    392 	if (cmd & IOC_OUT)
    393 		*dir++ = 'W';
    394 	if (cmd & IOC_IN)
    395 		*dir++ = 'R';
    396 	*dir = '\0';
    397 
    398 	wprintf(decimal ? ", _IO%s('%c',%ld" : ", _IO%s('%c',%#lx",
    399 	    dirbuf, (int) ((cmd >> 8) & 0xff), cmd & 0xff);
    400 	if ((cmd & IOC_VOID) == 0)
    401 		wprintf(decimal ? ",%ld)" : ",%#lx)",
    402 		    (cmd >> 16) & 0xff);
    403 	else
    404 		wprintf(")");
    405 }
    406 
    407 void
    408 nameiargprint(const char *prefix, struct ktr_header *kth,
    409     register_t **ap, int *argsize)
    410 {
    411 	struct ktr_entry *kte;
    412 
    413 	if (*argsize == 0)
    414 		errx(EXIT_FAILURE, "argument expected");
    415 	/*
    416 	 * XXX: binary emulation mode.
    417 	 */
    418 	kte = getpendq(kth, KTR_NAMEI, NULL);
    419 	if (kte == NULL)
    420 		argprint(prefix, ap, argsize);
    421 	else {
    422 		wprintf("%s", prefix);
    423 		nameiprint(&kte->kte_kth);
    424 		free(kte);
    425 		(*ap)++;
    426 		*argsize -= sizeof(register_t);
    427 	}
    428 }
    429 
    430 void
    431 syscallnameprint(int code)
    432 {
    433 
    434 	if (code >= cur_emul->nsysnames || code < 0)
    435 		wprintf("[%d]", code);
    436 	else
    437 		wprintf("%s", cur_emul->sysnames[code]);
    438 }
    439 
    440 void
    441 argprint(const char *prefix, register_t **ap, int *argsize)
    442 {
    443 
    444 	if (decimal)
    445 		wprintf("%s%ld", prefix, (long)**ap);
    446 	else
    447 		wprintf("%s%#lx", prefix, (long)**ap);
    448 	(*ap)++;
    449 	*argsize -= sizeof(register_t);
    450 }
    451 
    452 void
    453 syscallprint(struct ktr_header *kth)
    454 {
    455 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
    456 	register_t *ap;
    457 	const char *s;
    458 	int argsize;
    459 
    460 	syscallnameprint(ktr->ktr_code);
    461 
    462 	/*
    463 	 * Arguments processing.
    464 	 */
    465 	argsize = ktr->ktr_argsize;
    466 	if (argsize == 0) {
    467 		wprintf("(");
    468 		goto noargument;
    469 	}
    470 
    471 	ap = (register_t *)(ktr + 1);
    472 	if (!fancy)
    473 		goto print_first;
    474 
    475 	switch (ktr->ktr_code) {
    476 	/*
    477 	 * All these have a path as the first param.
    478 	 * The order is same as syscalls.master.
    479 	 */
    480 	case SYS_open:
    481 	case SYS_link:
    482 	case SYS_unlink:
    483 	case SYS_chdir:
    484 	case SYS_mknod:
    485 	case SYS_chmod:
    486 	case SYS_chown:
    487 	case SYS_unmount:
    488 	case SYS_access:
    489 	case SYS_chflags:
    490 	case SYS_acct:
    491 	case SYS_revoke:
    492 	case SYS_symlink:
    493 	case SYS_readlink:
    494 	case SYS_execve:
    495 	case SYS_chroot:
    496 	case SYS_rename:
    497 	case SYS_mkfifo:
    498 	case SYS_mkdir:
    499 	case SYS_rmdir:
    500 	case SYS_utimes:
    501 	case SYS_quotactl:
    502 	case SYS_statvfs1:
    503 	case SYS_getfh:
    504 	case SYS_pathconf:
    505 	case SYS_truncate:
    506 	case SYS_undelete:
    507 	case SYS___posix_rename:
    508 	case SYS_lchmod:
    509 	case SYS_lchown:
    510 	case SYS_lutimes:
    511 	case SYS___stat30:
    512 	case SYS___lstat30:
    513 	case SYS___posix_chown:
    514 	case SYS___posix_lchown:
    515 	case SYS_lchflags:
    516 		nameiargprint("(", kth, &ap, &argsize);
    517 
    518 		/*
    519 		 * 2nd argument is also pathname.
    520 		 */
    521 		switch (ktr->ktr_code) {
    522 		case SYS_link:
    523 		case SYS_rename:
    524 		case SYS___posix_rename:
    525 			nameiargprint(", ", kth, &ap, &argsize);
    526 			break;
    527 		}
    528 		break;
    529 
    530 	case SYS_compat_16___sigaction14 :
    531 		wprintf("(%s", signals[(int)*ap].name);
    532 		ap++;
    533 		argsize -= sizeof(register_t);
    534 		break;
    535 
    536 	case SYS_ioctl :
    537 		argprint("(", &ap, &argsize);
    538 		if ((s = ioctlname(*ap)) != NULL)
    539 			wprintf(", %s", s);
    540 		else
    541 			ioctldecode(*ap);
    542 		ap++;
    543 		argsize -= sizeof(register_t);
    544 		break;
    545 
    546 	case SYS_ptrace :
    547 		if (*ap >= 0 &&
    548 		    *ap < sizeof(ptrace_ops) / sizeof(ptrace_ops[0]))
    549 			wprintf("(%s", ptrace_ops[*ap]);
    550 		else
    551 			wprintf("(%ld", (long)*ap);
    552 		ap++;
    553 		argsize -= sizeof(register_t);
    554 		break;
    555 
    556 	default:
    557 print_first:
    558 		argprint("(", &ap, &argsize);
    559 		break;
    560 	}
    561 
    562 	/* Print rest of argument. */
    563 	while (argsize > 0)
    564 		argprint(", ", &ap, &argsize);
    565 
    566 noargument:
    567 	wprintf(")");
    568 }
    569 
    570 void
    571 ktrsyscall(struct ktr_entry *kte)
    572 {
    573 	struct ktr_header *kth = &kte->kte_kth;
    574 	struct ktr_syscall *ktr = (struct ktr_syscall *)(kth + 1);
    575 
    576 	switch (ktr->ktr_code) {
    577 	case SYS_exit:
    578 		dumpheader(kth);
    579 		syscallprint(kth);
    580 		break;
    581 	default:
    582 		putpendq(kte);
    583 		return;
    584 	}
    585 
    586 	free(kte);
    587 }
    588 
    589 void
    590 sysretprint(struct ktr_header *kth)
    591 {
    592 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
    593 	register_t ret = ktr->ktr_retval;
    594 	int error = ktr->ktr_error;
    595 
    596 	indent(50);
    597 	if (error == EJUSTRETURN)
    598 		wprintf(" JUSTRETURN");
    599 	else if (error == ERESTART)
    600 		wprintf(" RESTART");
    601 	else if (error) {
    602 		wprintf(" Err#%d", error);
    603 		if (error < MAXERRNOS && error >= -2)
    604 			wprintf(" %s", errnos[error].name);
    605 	} else
    606 		switch (ktr->ktr_code) {
    607 		case SYS_mmap:
    608 			wprintf(" = %p", (long)ret);
    609 			break;
    610 		default:
    611 			wprintf(" = %ld", (long)ret);
    612 			if (kth->ktr_len > offsetof(struct ktr_sysret,
    613 			    ktr_retval_1) && ktr->ktr_retval_1 != 0)
    614 				wprintf(", %ld", (long)ktr->ktr_retval_1);
    615 			break;
    616 		}
    617 }
    618 
    619 void
    620 ktrsysret(struct ktr_entry *kte)
    621 {
    622 	struct ktr_header *kth = &kte->kte_kth;
    623 	struct ktr_sysret *ktr = (struct ktr_sysret *)(kth + 1);
    624 	struct ktr_entry *genio;
    625 	struct ktr_entry *syscall_ent;
    626 
    627 	dumpheader(kth);
    628 
    629 	/* Print syscall name and arguments. */
    630 	syscall_ent = getpendq(kth, KTR_SYSCALL, NULL);
    631 	if (syscall_ent == NULL)
    632 		/*
    633 		 * Possibilly a child of fork/vfork, or tracing of
    634 		 * process started during system call.
    635 		 */
    636 		syscallnameprint(ktr->ktr_code);
    637 	else {
    638 		syscallprint(&syscall_ent->kte_kth);
    639 		free(syscall_ent);
    640 	}
    641 
    642 	/* Print return value and an error if any. */
    643 	sysretprint(kth);
    644 
    645 	genio = getpendq(kth, KTR_GENIO, NULL);
    646 	if (genio != NULL) {
    647 		genioprint(&genio->kte_kth);
    648 		free(genio);
    649 	}
    650 
    651 	flushpendq(kte);
    652 	free(kte);
    653 }
    654 
    655 void
    656 nameiprint(struct ktr_header *kth)
    657 {
    658 
    659 	wprintf("\"%.*s\"", kth->ktr_len, (char *)(kth + 1));
    660 }
    661 
    662 #ifdef notused
    663 void
    664 ktrnamei(struct ktr_entry *kte)
    665 {
    666 	struct ktr_header *kth = &kte->kte_kth;
    667 
    668 	dumpheader(kth);
    669 	wprintf("namei(");
    670 	nameiprint(kth);
    671 	wprintf(")");
    672 
    673 	free(kte);
    674 }
    675 #endif
    676 
    677 void
    678 ktremul(struct ktr_entry *kte)
    679 {
    680 	struct ktr_header *kth = &kte->kte_kth;
    681 	char *emul = (char *)(kth + 1);
    682 
    683 	dumpheader(kth);
    684 	wprintf("emul(%s)", emul);
    685 	setemul(emul, kth->ktr_pid, 1);
    686 
    687 	free(kte);
    688 }
    689 
    690 void
    691 genioprint(struct ktr_header *kth)
    692 {
    693 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
    694 	static int screenwidth = 0;
    695 	int datalen = kth->ktr_len - sizeof(struct ktr_genio);
    696 	/*
    697 	 * Need to be unsigned type so that positive value is passed
    698 	 * to vis(), which will call isgraph().
    699 	 */
    700 	unsigned char *dp = (unsigned char *)(ktr + 1);
    701 	int w;
    702 	char visbuf[5];
    703 
    704 	if (screenwidth == 0) {
    705 		struct winsize ws;
    706 
    707 		if (fancy && ioctl(fileno(stderr), TIOCGWINSZ, &ws) != -1 &&
    708 		    ws.ws_col > 8)
    709 			screenwidth = ws.ws_col;
    710 		else
    711 			screenwidth = 80;
    712 	}
    713 
    714 	if (maxdata && datalen > maxdata)
    715 		datalen = maxdata;
    716 	newline();
    717 	wprintf("       \"");
    718 	for (; datalen > 0; datalen--, dp++) {
    719 		(void) vis(visbuf, *dp, VIS_NL|VIS_TAB|VIS_CSTYLE,
    720 		    /* We put NUL at the end of buffer when reading */
    721 		    *(dp + 1));
    722 		visbuf[4] = '\0';
    723 		w = strlen(visbuf);
    724 		if (width + w + 2 >= screenwidth)
    725 			break;
    726 		wprintf("%s", visbuf);
    727 		if (width + 2 >= screenwidth)
    728 			break;
    729 	}
    730 	wprintf("\"");
    731 }
    732 
    733 #ifdef notused
    734 void
    735 ktrgenio(struct ktr_entry *kte)
    736 {
    737 	struct ktr_header *kth = &kte->kte_kth;
    738 	struct ktr_genio *ktr = (struct ktr_genio *)(kth + 1);
    739 
    740 	dumpheader(kth);
    741 	wprintf("genio fd %d %s",
    742 	    ktr->ktr_fd, ktr->ktr_rw ? "write" : "read");
    743 	genioprint(kth);
    744 
    745 	free(kte);
    746 }
    747 #endif
    748 
    749 void
    750 ktrpsig(struct ktr_entry *kte)
    751 {
    752 	struct ktr_header *kth = &kte->kte_kth;
    753 	struct ktr_psig *psig = (struct ktr_psig *)(kth + 1);
    754 
    755 	dumpheader(kth);
    756 	wprintf("SIG%s ", sys_signame[psig->signo]);
    757 	if (psig->action == SIG_DFL)
    758 		wprintf("SIG_DFL");
    759 	else {
    760 		wprintf("caught handler=0x%lx mask=0x%lx code=0x%x",
    761 		    (u_long)psig->action, (unsigned long)psig->mask.__bits[0],
    762 		    psig->code);
    763 	}
    764 
    765 	free(kte);
    766 }
    767 
    768 void
    769 ktrcsw(struct ktr_entry *kte)
    770 {
    771 	struct ktr_header *kth = &kte->kte_kth;
    772 	struct ktr_csw *cs = (struct ktr_csw *)(kth + 1);
    773 
    774 	dumpheader(kth);
    775 	wprintf("%s %s", cs->out ? "stop" : "resume",
    776 	    cs->user ? "user" : "kernel");
    777 
    778 	free(kte);
    779 }
    780