1 /* $OpenBSD: unstr.c,v 1.15 2016/03/07 12:07:56 mestre Exp $ */
2 /* $NetBSD: unstr.c,v 1.3 1995/03/23 08:29:00 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1991, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Ken Arnold.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 /*
37 * This program un-does what "strfile" makes, thereby obtaining the
38 * original file again. This can be invoked with the name of the output
39 * file, the input file, or both. If invoked with only a single argument
40 * ending in ".dat", it is pressumed to be the input file and the output
41 * file will be the same stripped of the ".dat". If the single argument
42 * doesn't end in ".dat", then it is presumed to be the output file, and
43 * the input file is that name prepended by a ".dat". If both are given
44 * they are treated literally as the input and output files.
45 *
46 * Ken Arnold Aug 13, 1978
47 */
48
49 #include <ctype.h>
50 #include <err.h>
51 #include <limits.h>
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <unistd.h>
56
57 #include "strfile.h"
58
59 char *Infile, /* name of input file */
60 Datafile[PATH_MAX], /* name of data file */
61 Delimch; /* delimiter character */
62
63 FILE *Inf, *Dataf;
64
65 void getargs(char *[]);
66 void order_unstr(STRFILE *);
67
68 int
main(int ac,char * av[])69 main(int ac, char *av[])
70 {
71 static STRFILE tbl; /* description table */
72
73 if (pledge("stdio rpath wpath cpath", NULL) == -1)
74 err(1, "pledge");
75
76 getargs(av);
77 if ((Inf = fopen(Infile, "r")) == NULL)
78 err(1, "fopen `%s'", Infile);
79 if ((Dataf = fopen(Datafile, "r")) == NULL)
80 err(1, "fopen `%s'", Datafile);
81
82 if (pledge("stdio", NULL) == -1)
83 err(1, "pledge");
84
85 (void) fread(&tbl.str_version, sizeof(tbl.str_version), 1, Dataf);
86 (void) fread(&tbl.str_numstr, sizeof(tbl.str_numstr), 1, Dataf);
87 (void) fread(&tbl.str_longlen, sizeof(tbl.str_longlen), 1, Dataf);
88 (void) fread(&tbl.str_shortlen, sizeof(tbl.str_shortlen), 1, Dataf);
89 (void) fread(&tbl.str_flags, sizeof(tbl.str_flags), 1, Dataf);
90 (void) fread( tbl.stuff, sizeof(tbl.stuff), 1, Dataf);
91 if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM)))
92 errx(1, "nothing to do -- table in file order");
93 Delimch = tbl.str_delim;
94 order_unstr(&tbl);
95 (void) fclose(Inf);
96 (void) fclose(Dataf);
97 return 0;
98 }
99
100 void
getargs(char * av[])101 getargs(char *av[])
102 {
103 if (!*++av) {
104 (void) fprintf(stderr, "usage: %s datafile\n", getprogname());
105 exit(1);
106 }
107 Infile = *av;
108 (void) strlcpy(Datafile, Infile, sizeof(Datafile));
109 if (strlcat(Datafile, ".dat", sizeof(Datafile)) >= sizeof(Datafile))
110 errx(1, "`%s': filename too long", Infile);
111 }
112
113 void
order_unstr(STRFILE * tbl)114 order_unstr(STRFILE *tbl)
115 {
116 unsigned int i;
117 char *sp;
118 int32_t pos;
119 char buf[BUFSIZ];
120
121 for (i = 0; i < tbl->str_numstr; i++) {
122 (void) fread((char *) &pos, 1, sizeof pos, Dataf);
123 (void) fseek(Inf, ntohl(pos), SEEK_SET);
124 if (i != 0)
125 (void) printf("%c\n", Delimch);
126 for (;;) {
127 sp = fgets(buf, sizeof buf, Inf);
128 if (sp == NULL || STR_ENDSTRING(sp, *tbl))
129 break;
130 else
131 fputs(sp, stdout);
132 }
133 }
134 }
135