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 /*
34 * This program un-does what "strfile" makes, thereby obtaining the
35 * original file again. This can be invoked with the name of the output
36 * file, the input file, or both. If invoked with only a single argument
37 * ending in ".dat", it is pressumed to be the input file and the output
38 * file will be the same stripped of the ".dat". If the single argument
39 * doesn't end in ".dat", then it is presumed to be the output file, and
40 * the input file is that name prepended by a ".dat". If both are given
41 * they are treated literally as the input and output files.
42 *
43 * Ken Arnold Aug 13, 1978
44 */
45
46 #include <sys/param.h>
47 #include <sys/endian.h>
48 #include <ctype.h>
49 #include <err.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <string.h>
53
54 #include "strfile.h"
55
56 static char *Infile, /* name of input file */
57 Datafile[MAXPATHLEN], /* name of data file */
58 Delimch; /* delimiter character */
59
60 static FILE *Inf, *Dataf;
61
62 static void order_unstr(STRFILE *);
63
64 /* ARGSUSED */
65 int
main(int argc,char * argv[])66 main(int argc, char *argv[])
67 {
68 static STRFILE tbl; /* description table */
69
70 if (argc != 2) {
71 fprintf(stderr, "usage: unstr datafile\n");
72 exit(1);
73 }
74 Infile = argv[1];
75 if ((size_t)snprintf(Datafile, sizeof(Datafile), "%s.dat", Infile) >=
76 sizeof(Datafile))
77 errx(1, "%s name too long", Infile);
78 if ((Inf = fopen(Infile, "r")) == NULL)
79 err(1, "%s", Infile);
80 if ((Dataf = fopen(Datafile, "r")) == NULL)
81 err(1, "%s", Datafile);
82 if (fread((char *)&tbl, sizeof(tbl), 1, Dataf) != 1) {
83 if (feof(Dataf))
84 errx(1, "%s read EOF", Datafile);
85 else
86 err(1, "%s read", Datafile);
87 }
88 tbl.str_version = be32toh(tbl.str_version);
89 tbl.str_numstr = be32toh(tbl.str_numstr);
90 tbl.str_longlen = be32toh(tbl.str_longlen);
91 tbl.str_shortlen = be32toh(tbl.str_shortlen);
92 tbl.str_flags = be32toh(tbl.str_flags);
93 if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM)))
94 errx(1, "nothing to do -- table in file order");
95 Delimch = tbl.str_delim;
96 order_unstr(&tbl);
97 fclose(Inf);
98 fclose(Dataf);
99 exit(0);
100 }
101
102 static void
order_unstr(STRFILE * tbl)103 order_unstr(STRFILE *tbl)
104 {
105 uint32_t i;
106 char *sp;
107 off_t pos;
108 char buf[BUFSIZ];
109
110 for (i = 0; i < tbl->str_numstr; i++) {
111 fread(&pos, 1, sizeof(pos), Dataf);
112 fseeko(Inf, be64toh(pos), SEEK_SET);
113 if (i != 0)
114 printf("%c\n", Delimch);
115 for (;;) {
116 sp = fgets(buf, sizeof(buf), Inf);
117 if (sp == NULL || STR_ENDSTRING(sp, *tbl))
118 break;
119 else
120 fputs(sp, stdout);
121 }
122 }
123 }
124