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      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
     43 static 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 
     76 char	*Infile,			/* name of input file */
     77 	Datafile[MAXPATHLEN],		/* name of data file */
     78 	Delimch;			/* delimiter character */
     79 
     80 FILE	*Inf, *Dataf;
     81 
     82 void	getargs(char *[]);
     83 int	main(int, char *[]);
     84 void	order_unstr(STRFILE *);
     85 
     86 /* ARGSUSED */
     87 int
     88 main(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 
    114 void
    115 getargs(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 
    126 void
    127 order_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