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/* $OpenBSD: extract.c,v 1.8 2009/10/27 23:59:35 deraadt Exp $ */
/* $NetBSD: extract.c,v 1.5 1995/03/26 03:27:53 glass Exp $ */
/*-
* Copyright (c) 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Hugh Smith at The University of Guelph.
*
* 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.
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <dirent.h>
#include <err.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "archive.h"
#include "extern.h"
/*
* extract --
* Extract files from the named archive - if member names given only
* extract those members otherwise extract all members. If 'o' option
* selected modify date of newly created file to be same as archive
* members date otherwise date is time of extraction. Does not modify
* archive.
*/
int
extract(char **argv)
{
char *file;
int afd, all, eval, tfd;
struct timeval tv[2];
struct stat sb;
CF cf;
eval = 0;
tv[0].tv_usec = tv[1].tv_usec = 0;
afd = open_archive(O_RDONLY);
/* Read from an archive, write to disk; pad on read. */
SETCF(afd, archive, 0, 0, RPAD);
for (all = !*argv; get_arobj(afd);) {
if (all)
file = chdr.name;
else if (!(file = files(argv))) {
skip_arobj(afd);
continue;
}
if (options & AR_U && !stat(file, &sb) &&
sb.st_mtime > chdr.date)
continue;
if (options & AR_CC) {
/* -C means do not overwrite existing files */
if ((tfd = open(file, O_WRONLY|O_CREAT|O_EXCL,
S_IWUSR)) < 0) {
skip_arobj(afd);
eval = 1;
continue;
}
} else {
if ((tfd = open(file, O_WRONLY|O_CREAT|O_TRUNC,
S_IWUSR)) < 0) {
warn("%s", file);
skip_arobj(afd);
eval = 1;
continue;
}
}
if (options & AR_V)
(void)printf("x - %s\n", file);
cf.wfd = tfd;
cf.wname = file;
copy_ar(&cf, chdr.size);
if (fchmod(tfd, (mode_t)chdr.mode)) {
warn("chmod: %s", file);
eval = 1;
}
if (options & AR_O) {
tv[0].tv_sec = tv[1].tv_sec = chdr.date;
if (futimes(tfd, tv)) {
warn("utimes: %s", file);
eval = 1;
}
}
(void)close(tfd);
if (!all && !*argv)
break;
}
close_archive(afd);
if (*argv) {
orphans(argv);
return (1);
}
return (0);
}
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