xref: /dragonfly/lib/libc/db/test/dbtest.c (revision 9bb2a92d)
1 /*-
2  * Copyright (c) 1992, 1993, 1994
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. All advertising materials mentioning features or use of this software
14  *    must display the following acknowledgement:
15  *	This product includes software developed by the University of
16  *	California, Berkeley and its contributors.
17  * 4. Neither the name of the University nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  *
33  * @(#) Copyright (c) 1992, 1993, 1994 The Regents of the University of California.  All rights reserved.
34  * @(#)dbtest.c	8.17 (Berkeley) 9/1/94
35  * $FreeBSD: src/lib/libc/db/test/dbtest.c,v 1.3.8.1 2000/08/21 22:44:47 jhb Exp $
36  * $DragonFly: src/lib/libc/db/test/dbtest.c,v 1.3 2003/11/12 20:21:23 eirikn Exp $
37  */
38 
39 #include <sys/param.h>
40 #include <sys/stat.h>
41 
42 #include <ctype.h>
43 #include <errno.h>
44 #include <fcntl.h>
45 #include <limits.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50 
51 #include <db.h>
52 
53 enum S { COMMAND, COMPARE, GET, PUT, REMOVE, SEQ, SEQFLAG, KEY, DATA };
54 
55 void	 compare (DBT *, DBT *);
56 DBTYPE	 dbtype (char *);
57 void	 dump (DB *, int);
58 void	 err (const char *, ...);
59 void	 get (DB *, DBT *);
60 void	 getdata (DB *, DBT *, DBT *);
61 void	 put (DB *, DBT *, DBT *);
62 void	 rem (DB *, DBT *);
63 char	*sflags (int);
64 void	 synk (DB *);
65 void	*rfile (char *, size_t *);
66 void	 seq (DB *, DBT *);
67 u_int	 setflags (char *);
68 void	*setinfo (DBTYPE, char *);
69 void	 usage (void);
70 void	*xmalloc (char *, size_t);
71 
72 DBTYPE type;				/* Database type. */
73 void *infop;				/* Iflags. */
74 u_long lineno;				/* Current line in test script. */
75 u_int flags;				/* Current DB flags. */
76 int ofd = STDOUT_FILENO;		/* Standard output fd. */
77 
78 DB *XXdbp;				/* Global for gdb. */
79 int XXlineno;				/* Fast breakpoint for gdb. */
80 
81 int
82 main(argc, argv)
83 	int argc;
84 	char *argv[];
85 {
86 	extern int optind;
87 	extern char *optarg;
88 	enum S command, state;
89 	DB *dbp;
90 	DBT data, key, keydata;
91 	size_t len;
92 	int ch, oflags, sflag;
93 	char *fname, *infoarg, *p, *t, buf[8 * 1024];
94 
95 	infoarg = NULL;
96 	fname = NULL;
97 	oflags = O_CREAT | O_RDWR;
98 	sflag = 0;
99 	while ((ch = getopt(argc, argv, "f:i:lo:s")) != EOF)
100 		switch (ch) {
101 		case 'f':
102 			fname = optarg;
103 			break;
104 		case 'i':
105 			infoarg = optarg;
106 			break;
107 		case 'l':
108 			oflags |= DB_LOCK;
109 			break;
110 		case 'o':
111 			if ((ofd = open(optarg,
112 			    O_WRONLY|O_CREAT|O_TRUNC, 0666)) < 0)
113 				err("%s: %s", optarg, strerror(errno));
114 			break;
115 		case 's':
116 			sflag = 1;
117 			break;
118 		case '?':
119 		default:
120 			usage();
121 		}
122 	argc -= optind;
123 	argv += optind;
124 
125 	if (argc != 2)
126 		usage();
127 
128 	/* Set the type. */
129 	type = dbtype(*argv++);
130 
131 	/* Open the descriptor file. */
132         if (strcmp(*argv, "-") && freopen(*argv, "r", stdin) == NULL)
133 	    err("%s: %s", *argv, strerror(errno));
134 
135 	/* Set up the db structure as necessary. */
136 	if (infoarg == NULL)
137 		infop = NULL;
138 	else
139 		for (p = strtok(infoarg, ",\t "); p != NULL;
140 		    p = strtok(0, ",\t "))
141 			if (*p != '\0')
142 				infop = setinfo(type, p);
143 
144 	/*
145 	 * Open the DB.  Delete any preexisting copy, you almost never
146 	 * want it around, and it often screws up tests.
147 	 */
148 	if (fname == NULL) {
149 		p = getenv("TMPDIR");
150 		if (p == NULL)
151 			p = "/var/tmp";
152 		(void)snprintf(buf, sizeof(buf), "%s/__dbtest", p);
153 		fname = buf;
154 		(void)unlink(buf);
155 	} else  if (!sflag)
156 		(void)unlink(fname);
157 
158 	if ((dbp = dbopen(fname,
159 	    oflags, S_IRUSR | S_IWUSR, type, infop)) == NULL)
160 		err("dbopen: %s", strerror(errno));
161 	XXdbp = dbp;
162 
163 	state = COMMAND;
164 	for (lineno = 1;
165 	    (p = fgets(buf, sizeof(buf), stdin)) != NULL; ++lineno) {
166 		/* Delete the newline, displaying the key/data is easier. */
167 		if (ofd == STDOUT_FILENO && (t = strchr(p, '\n')) != NULL)
168 			*t = '\0';
169 		if ((len = strlen(buf)) == 0 || isspace(*p) || *p == '#')
170 			continue;
171 
172 		/* Convenient gdb break point. */
173 		if (XXlineno == lineno)
174 			XXlineno = 1;
175 		switch (*p) {
176 		case 'c':			/* compare */
177 			if (state != COMMAND)
178 				err("line %lu: not expecting command", lineno);
179 			state = KEY;
180 			command = COMPARE;
181 			break;
182 		case 'e':			/* echo */
183 			if (state != COMMAND)
184 				err("line %lu: not expecting command", lineno);
185 			/* Don't display the newline, if CR at EOL. */
186 			if (p[len - 2] == '\r')
187 				--len;
188 			if (write(ofd, p + 1, len - 1) != len - 1 ||
189 			    write(ofd, "\n", 1) != 1)
190 				err("write: %s", strerror(errno));
191 			break;
192 		case 'g':			/* get */
193 			if (state != COMMAND)
194 				err("line %lu: not expecting command", lineno);
195 			state = KEY;
196 			command = GET;
197 			break;
198 		case 'p':			/* put */
199 			if (state != COMMAND)
200 				err("line %lu: not expecting command", lineno);
201 			state = KEY;
202 			command = PUT;
203 			break;
204 		case 'r':			/* remove */
205 			if (state != COMMAND)
206 				err("line %lu: not expecting command", lineno);
207                         if (flags == R_CURSOR) {
208 				rem(dbp, &key);
209 				state = COMMAND;
210                         } else {
211 				state = KEY;
212 				command = REMOVE;
213 			}
214 			break;
215 		case 'S':			/* sync */
216 			if (state != COMMAND)
217 				err("line %lu: not expecting command", lineno);
218 			synk(dbp);
219 			state = COMMAND;
220 			break;
221 		case 's':			/* seq */
222 			if (state != COMMAND)
223 				err("line %lu: not expecting command", lineno);
224 			if (flags == R_CURSOR) {
225 				state = KEY;
226 				command = SEQ;
227 			} else
228 				seq(dbp, &key);
229 			break;
230 		case 'f':
231 			flags = setflags(p + 1);
232 			break;
233 		case 'D':			/* data file */
234 			if (state != DATA)
235 				err("line %lu: not expecting data", lineno);
236 			data.data = rfile(p + 1, &data.size);
237 			goto ldata;
238 		case 'd':			/* data */
239 			if (state != DATA)
240 				err("line %lu: not expecting data", lineno);
241 			data.data = xmalloc(p + 1, len - 1);
242 			data.size = len - 1;
243 ldata:			switch (command) {
244 			case COMPARE:
245 				compare(&keydata, &data);
246 				break;
247 			case PUT:
248 				put(dbp, &key, &data);
249 				break;
250 			default:
251 				err("line %lu: command doesn't take data",
252 				    lineno);
253 			}
254 			if (type != DB_RECNO)
255 				free(key.data);
256 			free(data.data);
257 			state = COMMAND;
258 			break;
259 		case 'K':			/* key file */
260 			if (state != KEY)
261 				err("line %lu: not expecting a key", lineno);
262 			if (type == DB_RECNO)
263 				err("line %lu: 'K' not available for recno",
264 				    lineno);
265 			key.data = rfile(p + 1, &key.size);
266 			goto lkey;
267 		case 'k':			/* key */
268 			if (state != KEY)
269 				err("line %lu: not expecting a key", lineno);
270 			if (type == DB_RECNO) {
271 				static recno_t recno;
272 				recno = atoi(p + 1);
273 				key.data = &recno;
274 				key.size = sizeof(recno);
275 			} else {
276 				key.data = xmalloc(p + 1, len - 1);
277 				key.size = len - 1;
278 			}
279 lkey:			switch (command) {
280 			case COMPARE:
281 				getdata(dbp, &key, &keydata);
282 				state = DATA;
283 				break;
284 			case GET:
285 				get(dbp, &key);
286 				if (type != DB_RECNO)
287 					free(key.data);
288 				state = COMMAND;
289 				break;
290 			case PUT:
291 				state = DATA;
292 				break;
293 			case REMOVE:
294 				rem(dbp, &key);
295 				if ((type != DB_RECNO) && (flags != R_CURSOR))
296 					free(key.data);
297 				state = COMMAND;
298 				break;
299 			case SEQ:
300 				seq(dbp, &key);
301 				if ((type != DB_RECNO) && (flags != R_CURSOR))
302 					free(key.data);
303 				state = COMMAND;
304 				break;
305 			default:
306 				err("line %lu: command doesn't take a key",
307 				    lineno);
308 			}
309 			break;
310 		case 'o':
311 			dump(dbp, p[1] == 'r');
312 			break;
313 		default:
314 			err("line %lu: %s: unknown command character",
315 			    lineno, p);
316 		}
317 	}
318 #ifdef STATISTICS
319 	/*
320 	 * -l must be used (DB_LOCK must be set) for this to be
321 	 * used, otherwise a page will be locked and it will fail.
322 	 */
323 	if (type == DB_BTREE && oflags & DB_LOCK)
324 		__bt_stat(dbp);
325 #endif
326 	if (dbp->close(dbp))
327 		err("db->close: %s", strerror(errno));
328 	(void)close(ofd);
329 	exit(0);
330 }
331 
332 #define	NOOVERWRITE	"put failed, would overwrite key\n"
333 
334 void
335 compare(db1, db2)
336 	DBT *db1, *db2;
337 {
338 	register size_t len;
339 	register u_char *p1, *p2;
340 
341 	if (db1->size != db2->size)
342 		printf("compare failed: key->data len %lu != data len %lu\n",
343 		    db1->size, db2->size);
344 
345 	len = MIN(db1->size, db2->size);
346 	for (p1 = db1->data, p2 = db2->data; len--;)
347 		if (*p1++ != *p2++) {
348 			printf("compare failed at offset %d\n",
349 			    p1 - (u_char *)db1->data);
350 			break;
351 		}
352 }
353 
354 void
355 get(dbp, kp)
356 	DB *dbp;
357 	DBT *kp;
358 {
359 	DBT data;
360 
361 	switch (dbp->get(dbp, kp, &data, flags)) {
362 	case 0:
363 		(void)write(ofd, data.data, data.size);
364 		if (ofd == STDOUT_FILENO)
365 			(void)write(ofd, "\n", 1);
366 		break;
367 	case -1:
368 		err("line %lu: get: %s", lineno, strerror(errno));
369 		/* NOTREACHED */
370 	case 1:
371 #define	NOSUCHKEY	"get failed, no such key\n"
372 		if (ofd != STDOUT_FILENO)
373 			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
374 		else
375 			(void)fprintf(stderr, "%d: %.*s: %s",
376 			    lineno, MIN(kp->size, 20), kp->data, NOSUCHKEY);
377 #undef	NOSUCHKEY
378 		break;
379 	}
380 }
381 
382 void
383 getdata(dbp, kp, dp)
384 	DB *dbp;
385 	DBT *kp, *dp;
386 {
387 	switch (dbp->get(dbp, kp, dp, flags)) {
388 	case 0:
389 		return;
390 	case -1:
391 		err("line %lu: getdata: %s", lineno, strerror(errno));
392 		/* NOTREACHED */
393 	case 1:
394 		err("line %lu: getdata failed, no such key", lineno);
395 		/* NOTREACHED */
396 	}
397 }
398 
399 void
400 put(dbp, kp, dp)
401 	DB *dbp;
402 	DBT *kp, *dp;
403 {
404 	switch (dbp->put(dbp, kp, dp, flags)) {
405 	case 0:
406 		break;
407 	case -1:
408 		err("line %lu: put: %s", lineno, strerror(errno));
409 		/* NOTREACHED */
410 	case 1:
411 		(void)write(ofd, NOOVERWRITE, sizeof(NOOVERWRITE) - 1);
412 		break;
413 	}
414 }
415 
416 void
417 rem(dbp, kp)
418 	DB *dbp;
419 	DBT *kp;
420 {
421 	switch (dbp->del(dbp, kp, flags)) {
422 	case 0:
423 		break;
424 	case -1:
425 		err("line %lu: rem: %s", lineno, strerror(errno));
426 		/* NOTREACHED */
427 	case 1:
428 #define	NOSUCHKEY	"rem failed, no such key\n"
429 		if (ofd != STDOUT_FILENO)
430 			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
431 		else if (flags != R_CURSOR)
432 			(void)fprintf(stderr, "%d: %.*s: %s",
433 			    lineno, MIN(kp->size, 20), kp->data, NOSUCHKEY);
434 		else
435 			(void)fprintf(stderr,
436 			    "%d: rem of cursor failed\n", lineno);
437 #undef	NOSUCHKEY
438 		break;
439 	}
440 }
441 
442 void
443 synk(dbp)
444 	DB *dbp;
445 {
446 	switch (dbp->sync(dbp, flags)) {
447 	case 0:
448 		break;
449 	case -1:
450 		err("line %lu: synk: %s", lineno, strerror(errno));
451 		/* NOTREACHED */
452 	}
453 }
454 
455 void
456 seq(dbp, kp)
457 	DB *dbp;
458 	DBT *kp;
459 {
460 	DBT data;
461 
462 	switch (dbp->seq(dbp, kp, &data, flags)) {
463 	case 0:
464 		(void)write(ofd, data.data, data.size);
465 		if (ofd == STDOUT_FILENO)
466 			(void)write(ofd, "\n", 1);
467 		break;
468 	case -1:
469 		err("line %lu: seq: %s", lineno, strerror(errno));
470 		/* NOTREACHED */
471 	case 1:
472 #define	NOSUCHKEY	"seq failed, no such key\n"
473 		if (ofd != STDOUT_FILENO)
474 			(void)write(ofd, NOSUCHKEY, sizeof(NOSUCHKEY) - 1);
475 		else if (flags == R_CURSOR)
476 			(void)fprintf(stderr, "%d: %.*s: %s",
477 			    lineno, MIN(kp->size, 20), kp->data, NOSUCHKEY);
478 		else
479 			(void)fprintf(stderr,
480 			    "%d: seq (%s) failed\n", lineno, sflags(flags));
481 #undef	NOSUCHKEY
482 		break;
483 	}
484 }
485 
486 void
487 dump(dbp, rev)
488 	DB *dbp;
489 	int rev;
490 {
491 	DBT key, data;
492 	int flags, nflags;
493 
494 	if (rev) {
495 		flags = R_LAST;
496 		nflags = R_PREV;
497 	} else {
498 		flags = R_FIRST;
499 		nflags = R_NEXT;
500 	}
501 	for (;; flags = nflags)
502 		switch (dbp->seq(dbp, &key, &data, flags)) {
503 		case 0:
504 			(void)write(ofd, data.data, data.size);
505 			if (ofd == STDOUT_FILENO)
506 				(void)write(ofd, "\n", 1);
507 			break;
508 		case 1:
509 			goto done;
510 		case -1:
511 			err("line %lu: (dump) seq: %s",
512 			    lineno, strerror(errno));
513 			/* NOTREACHED */
514 		}
515 done:	return;
516 }
517 
518 u_int
519 setflags(s)
520 	char *s;
521 {
522 	char *p, *index();
523 
524 	for (; isspace(*s); ++s);
525 	if (*s == '\n' || *s == '\0')
526 		return (0);
527 	if ((p = index(s, '\n')) != NULL)
528 		*p = '\0';
529 	if (!strcmp(s, "R_CURSOR"))		return (R_CURSOR);
530 	if (!strcmp(s, "R_FIRST"))		return (R_FIRST);
531 	if (!strcmp(s, "R_IAFTER")) 		return (R_IAFTER);
532 	if (!strcmp(s, "R_IBEFORE")) 		return (R_IBEFORE);
533 	if (!strcmp(s, "R_LAST")) 		return (R_LAST);
534 	if (!strcmp(s, "R_NEXT")) 		return (R_NEXT);
535 	if (!strcmp(s, "R_NOOVERWRITE"))	return (R_NOOVERWRITE);
536 	if (!strcmp(s, "R_PREV"))		return (R_PREV);
537 	if (!strcmp(s, "R_SETCURSOR"))		return (R_SETCURSOR);
538 
539 	err("line %lu: %s: unknown flag", lineno, s);
540 	/* NOTREACHED */
541 }
542 
543 char *
544 sflags(flags)
545 	int flags;
546 {
547 	switch (flags) {
548 	case R_CURSOR:		return ("R_CURSOR");
549 	case R_FIRST:		return ("R_FIRST");
550 	case R_IAFTER:		return ("R_IAFTER");
551 	case R_IBEFORE:		return ("R_IBEFORE");
552 	case R_LAST:		return ("R_LAST");
553 	case R_NEXT:		return ("R_NEXT");
554 	case R_NOOVERWRITE:	return ("R_NOOVERWRITE");
555 	case R_PREV:		return ("R_PREV");
556 	case R_SETCURSOR:	return ("R_SETCURSOR");
557 	}
558 
559 	return ("UNKNOWN!");
560 }
561 
562 DBTYPE
563 dbtype(s)
564 	char *s;
565 {
566 	if (!strcmp(s, "btree"))
567 		return (DB_BTREE);
568 	if (!strcmp(s, "hash"))
569 		return (DB_HASH);
570 	if (!strcmp(s, "recno"))
571 		return (DB_RECNO);
572 	err("%s: unknown type (use btree, hash or recno)", s);
573 	/* NOTREACHED */
574 }
575 
576 void *
577 setinfo(type, s)
578 	DBTYPE type;
579 	char *s;
580 {
581 	static BTREEINFO ib;
582 	static HASHINFO ih;
583 	static RECNOINFO rh;
584 	char *eq, *index();
585 
586 	if ((eq = index(s, '=')) == NULL)
587 		err("%s: illegal structure set statement", s);
588 	*eq++ = '\0';
589 	if (!isdigit(*eq))
590 		err("%s: structure set statement must be a number", s);
591 
592 	switch (type) {
593 	case DB_BTREE:
594 		if (!strcmp("flags", s)) {
595 			ib.flags = atoi(eq);
596 			return (&ib);
597 		}
598 		if (!strcmp("cachesize", s)) {
599 			ib.cachesize = atoi(eq);
600 			return (&ib);
601 		}
602 		if (!strcmp("maxkeypage", s)) {
603 			ib.maxkeypage = atoi(eq);
604 			return (&ib);
605 		}
606 		if (!strcmp("minkeypage", s)) {
607 			ib.minkeypage = atoi(eq);
608 			return (&ib);
609 		}
610 		if (!strcmp("lorder", s)) {
611 			ib.lorder = atoi(eq);
612 			return (&ib);
613 		}
614 		if (!strcmp("psize", s)) {
615 			ib.psize = atoi(eq);
616 			return (&ib);
617 		}
618 		break;
619 	case DB_HASH:
620 		if (!strcmp("bsize", s)) {
621 			ih.bsize = atoi(eq);
622 			return (&ih);
623 		}
624 		if (!strcmp("ffactor", s)) {
625 			ih.ffactor = atoi(eq);
626 			return (&ih);
627 		}
628 		if (!strcmp("nelem", s)) {
629 			ih.nelem = atoi(eq);
630 			return (&ih);
631 		}
632 		if (!strcmp("cachesize", s)) {
633 			ih.cachesize = atoi(eq);
634 			return (&ih);
635 		}
636 		if (!strcmp("lorder", s)) {
637 			ih.lorder = atoi(eq);
638 			return (&ih);
639 		}
640 		break;
641 	case DB_RECNO:
642 		if (!strcmp("flags", s)) {
643 			rh.flags = atoi(eq);
644 			return (&rh);
645 		}
646 		if (!strcmp("cachesize", s)) {
647 			rh.cachesize = atoi(eq);
648 			return (&rh);
649 		}
650 		if (!strcmp("lorder", s)) {
651 			rh.lorder = atoi(eq);
652 			return (&rh);
653 		}
654 		if (!strcmp("reclen", s)) {
655 			rh.reclen = atoi(eq);
656 			return (&rh);
657 		}
658 		if (!strcmp("bval", s)) {
659 			rh.bval = atoi(eq);
660 			return (&rh);
661 		}
662 		if (!strcmp("psize", s)) {
663 			rh.psize = atoi(eq);
664 			return (&rh);
665 		}
666 		break;
667 	}
668 	err("%s: unknown structure value", s);
669 	/* NOTREACHED */
670 }
671 
672 void *
673 rfile(name, lenp)
674 	char *name;
675 	size_t *lenp;
676 {
677 	struct stat sb;
678 	void *p;
679 	int fd;
680 	char *np, *index();
681 
682 	for (; isspace(*name); ++name);
683 	if ((np = index(name, '\n')) != NULL)
684 		*np = '\0';
685 	if ((fd = open(name, O_RDONLY, 0)) < 0 ||
686 	    fstat(fd, &sb))
687 		err("%s: %s\n", name, strerror(errno));
688 #ifdef NOT_PORTABLE
689 	if (sb.st_size > (off_t)SIZE_T_MAX)
690 		err("%s: %s\n", name, strerror(E2BIG));
691 #endif
692 	if ((p = (void *)malloc((u_int)sb.st_size)) == NULL)
693 		err("%s", strerror(errno));
694 	(void)read(fd, p, (int)sb.st_size);
695 	*lenp = sb.st_size;
696 	(void)close(fd);
697 	return (p);
698 }
699 
700 void *
701 xmalloc(text, len)
702 	char *text;
703 	size_t len;
704 {
705 	void *p;
706 
707 	if ((p = (void *)malloc(len)) == NULL)
708 		err("%s", strerror(errno));
709 	memmove(p, text, len);
710 	return (p);
711 }
712 
713 void
714 usage()
715 {
716 	(void)fprintf(stderr,
717 	    "usage: dbtest [-l] [-f file] [-i info] [-o file] type script\n");
718 	exit(1);
719 }
720 
721 #if __STDC__
722 #include <stdarg.h>
723 #else
724 #include <varargs.h>
725 #endif
726 
727 void
728 #if __STDC__
729 err(const char *fmt, ...)
730 #else
731 err(fmt, va_alist)
732 	char *fmt;
733         va_dcl
734 #endif
735 {
736 	va_list ap;
737 #if __STDC__
738 	va_start(ap, fmt);
739 #else
740 	va_start(ap);
741 #endif
742 	(void)fprintf(stderr, "dbtest: ");
743 	(void)vfprintf(stderr, fmt, ap);
744 	va_end(ap);
745 	(void)fprintf(stderr, "\n");
746 	exit(1);
747 	/* NOTREACHED */
748 }
749