1 /*-
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Ken Arnold.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #if 0
34 #ifndef lint
35 static const char copyright[] =
36 "@(#) Copyright (c) 1991, 1993\n\
37 The Regents of the University of California. All rights reserved.\n";
38 #endif /* not lint */
39
40 #ifndef lint
41 static const char sccsid[] = "@(#)unstr.c 8.1 (Berkeley) 5/31/93";
42 #endif /* not lint */
43 #endif
44 #include <sys/cdefs.h>
45 __FBSDID("$FreeBSD$");
46
47 /*
48 * This program un-does what "strfile" makes, thereby obtaining the
49 * original file again. This can be invoked with the name of the output
50 * file, the input file, or both. If invoked with only a single argument
51 * ending in ".dat", it is pressumed to be the input file and the output
52 * file will be the same stripped of the ".dat". If the single argument
53 * doesn't end in ".dat", then it is presumed to be the output file, and
54 * the input file is that name prepended by a ".dat". If both are given
55 * they are treated literally as the input and output files.
56 *
57 * Ken Arnold Aug 13, 1978
58 */
59
60 #include <sys/param.h>
61 #include <sys/endian.h>
62 #include <ctype.h>
63 #include <err.h>
64 #include <stdio.h>
65 #include <stdlib.h>
66 #include <string.h>
67
68 #include "strfile.h"
69
70 static char *Infile, /* name of input file */
71 Datafile[MAXPATHLEN], /* name of data file */
72 Delimch; /* delimiter character */
73
74 static FILE *Inf, *Dataf;
75
76 static void order_unstr(STRFILE *);
77
78 /* ARGSUSED */
79 int
main(int argc,char * argv[])80 main(int argc, char *argv[])
81 {
82 static STRFILE tbl; /* description table */
83
84 if (argc != 2) {
85 fprintf(stderr, "usage: unstr datafile\n");
86 exit(1);
87 }
88 Infile = argv[1];
89 strcpy(Datafile, Infile);
90 strcat(Datafile, ".dat");
91 if ((Inf = fopen(Infile, "r")) == NULL)
92 err(1, "%s", Infile);
93 if ((Dataf = fopen(Datafile, "r")) == NULL)
94 err(1, "%s", Datafile);
95 fread((char *)&tbl, sizeof(tbl), 1, Dataf);
96 tbl.str_version = be32toh(tbl.str_version);
97 tbl.str_numstr = be32toh(tbl.str_numstr);
98 tbl.str_longlen = be32toh(tbl.str_longlen);
99 tbl.str_shortlen = be32toh(tbl.str_shortlen);
100 tbl.str_flags = be32toh(tbl.str_flags);
101 if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM)))
102 errx(1, "nothing to do -- table in file order");
103 Delimch = tbl.str_delim;
104 order_unstr(&tbl);
105 fclose(Inf);
106 fclose(Dataf);
107 exit(0);
108 }
109
110 static void
order_unstr(STRFILE * tbl)111 order_unstr(STRFILE *tbl)
112 {
113 uint32_t i;
114 char *sp;
115 off_t pos;
116 char buf[BUFSIZ];
117
118 for (i = 0; i < tbl->str_numstr; i++) {
119 fread(&pos, 1, sizeof(pos), Dataf);
120 fseeko(Inf, be64toh(pos), SEEK_SET);
121 if (i != 0)
122 printf("%c\n", Delimch);
123 for (;;) {
124 sp = fgets(buf, sizeof(buf), Inf);
125 if (sp == NULL || STR_ENDSTRING(sp, *tbl))
126 break;
127 else
128 fputs(sp, stdout);
129 }
130 }
131 }
132