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/* $OpenBSD: unstr.c,v 1.11 2014/11/16 04:49:48 guenther Exp $ */
/* $NetBSD: unstr.c,v 1.3 1995/03/23 08:29:00 cgd Exp $ */
/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ken Arnold.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This program un-does what "strfile" makes, thereby obtaining the
* original file again. This can be invoked with the name of the output
* file, the input file, or both. If invoked with only a single argument
* ending in ".dat", it is pressumed to be the input file and the output
* file will be the same stripped of the ".dat". If the single argument
* doesn't end in ".dat", then it is presumed to be the output file, and
* the input file is that name prepended by a ".dat". If both are given
* they are treated literally as the input and output files.
*
* Ken Arnold Aug 13, 1978
*/
#include <ctype.h>
#include <err.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include "strfile.h"
char *Infile, /* name of input file */
Datafile[PATH_MAX], /* name of data file */
Delimch; /* delimiter character */
FILE *Inf, *Dataf;
void getargs(char *[]);
void order_unstr(STRFILE *);
/* ARGSUSED */
int
main(int ac, char *av[])
{
static STRFILE tbl; /* description table */
getargs(av);
if ((Inf = fopen(Infile, "r")) == NULL)
err(1, "fopen `%s'", Infile);
if ((Dataf = fopen(Datafile, "r")) == NULL)
err(1, "fopen `%s'", Datafile);
(void) fread(&tbl.str_version, sizeof(tbl.str_version), 1, Dataf);
(void) fread(&tbl.str_numstr, sizeof(tbl.str_numstr), 1, Dataf);
(void) fread(&tbl.str_longlen, sizeof(tbl.str_longlen), 1, Dataf);
(void) fread(&tbl.str_shortlen, sizeof(tbl.str_shortlen), 1, Dataf);
(void) fread(&tbl.str_flags, sizeof(tbl.str_flags), 1, Dataf);
(void) fread( tbl.stuff, sizeof(tbl.stuff), 1, Dataf);
if (!(tbl.str_flags & (STR_ORDERED | STR_RANDOM)))
errx(1, "nothing to do -- table in file order");
Delimch = tbl.str_delim;
order_unstr(&tbl);
(void) fclose(Inf);
(void) fclose(Dataf);
exit(0);
}
void
getargs(char *av[])
{
if (!*++av) {
(void) fprintf(stderr, "usage: unstr datafile\n");
exit(1);
}
Infile = *av;
(void) strlcpy(Datafile, Infile, sizeof(Datafile));
if (strlcat(Datafile, ".dat", sizeof(Datafile)) >= sizeof(Datafile))
errx(1, "`%s': filename too long", Infile);
}
void
order_unstr(STRFILE *tbl)
{
unsigned int i;
char *sp;
int32_t pos;
char buf[BUFSIZ];
for (i = 0; i < tbl->str_numstr; i++) {
(void) fread((char *) &pos, 1, sizeof pos, Dataf);
(void) fseek(Inf, ntohl(pos), SEEK_SET);
if (i != 0)
(void) printf("%c\n", Delimch);
for (;;) {
sp = fgets(buf, sizeof buf, Inf);
if (sp == NULL || STR_ENDSTRING(sp, *tbl))
break;
else
fputs(sp, stdout);
}
}
}
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