1/*	$NetBSD: unstr.c,v 1.16 2020/04/30 12:40:11 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1991, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Ken Arnold.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#include <sys/cdefs.h>
36#ifndef lint
37__COPYRIGHT("@(#) Copyright (c) 1991, 1993\
38 The Regents of the University of California.  All rights reserved.");
39#endif /* not lint */
40
41#ifndef lint
42#if 0
43static char sccsid[] = "@(#)unstr.c	8.1 (Berkeley) 5/31/93";
44#else
45__RCSID("$NetBSD: unstr.c,v 1.16 2020/04/30 12:40:11 christos Exp $");
46#endif
47#endif /* not lint */
48
49/*
50 *	This program un-does what "strfile" makes, thereby obtaining the
51 * original file again.  This can be invoked with the name of the output
52 * file, the input file, or both. If invoked with only a single argument
53 * ending in ".dat", it is pressumed to be the input file and the output
54 * file will be the same stripped of the ".dat".  If the single argument
55 * doesn't end in ".dat", then it is presumed to be the output file, and
56 * the input file is that name prepended by a ".dat".  If both are given
57 * they are treated literally as the input and output files.
58 *
59 *	Ken Arnold		Aug 13, 1978
60 */
61
62#include <sys/types.h>
63#include <sys/param.h>
64#include <sys/endian.h>
65#include <ctype.h>
66#include <err.h>
67#include <stdio.h>
68#include <stdlib.h>
69#include <string.h>
70#include "strfile.h"
71
72#ifndef MAXPATHLEN
73#define	MAXPATHLEN	1024
74#endif	/* MAXPATHLEN */
75
76char	*Infile,			/* name of input file */
77	Datafile[MAXPATHLEN],		/* name of data file */
78	Delimch;			/* delimiter character */
79
80FILE	*Inf, *Dataf;
81
82void	getargs(char *[]);
83int	main(int, char *[]);
84void	order_unstr(STRFILE *);
85
86/* ARGSUSED */
87int
88main(int ac __unused, char **av)
89{
90	static STRFILE	tbl;		/* description table */
91
92	getargs(av);
93	if ((Inf = fopen(Infile, "r")) == NULL)
94		err(EXIT_FAILURE, "fopen %s", Infile);
95	if ((Dataf = fopen(Datafile, "r")) == NULL)
96		err(EXIT_FAILURE, "fopen %s", Datafile);
97	(void) fread((char *) &tbl, sizeof tbl, 1, Dataf);
98	BE32TOH(tbl.str_version);
99	BE32TOH(tbl.str_numstr);
100	BE32TOH(tbl.str_longlen);
101	BE32TOH(tbl.str_shortlen);
102	BE32TOH(tbl.str_flags);
103	if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM))) {
104		fprintf(stderr, "nothing to do -- table in file order\n");
105		exit(1);
106	}
107	Delimch = tbl.str_delim;
108	order_unstr(&tbl);
109	(void) fclose(Inf);
110	(void) fclose(Dataf);
111	return EXIT_SUCCESS;
112}
113
114void
115getargs(char *av[])
116{
117	if (!*++av ||
118	    (size_t)snprintf(Datafile, sizeof(Datafile), "%s.dat", Infile) >
119	    sizeof(Datafile)) {
120		(void) fprintf(stderr, "Usage: %s datafile\n", getprogname());
121		exit(EXIT_FAILURE);
122	}
123	Infile = *av;
124}
125
126void
127order_unstr(STRFILE *tbl)
128{
129	unsigned int	i;
130	char	*sp;
131	off_t	pos;
132	char	buf[BUFSIZ];
133
134	for (i = 0; i < tbl->str_numstr; i++) {
135		(void) fread((char *) &pos, 1, sizeof pos, Dataf);
136		(void) fseek(Inf, be64toh(pos), SEEK_SET);
137		if (i != 0)
138			(void) printf("%c\n", Delimch);
139		for (;;) {
140			sp = fgets(buf, sizeof buf, Inf);
141			if (sp == NULL || STR_ENDSTRING(sp, *tbl))
142				break;
143			else
144				fputs(sp, stdout);
145		}
146	}
147}
148