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/* vi: set sw=4 ts=4: */
/*
* Mini ar implementation for busybox
*
* Copyright (C) 2000 by Glenn McGrath
* Written by Glenn McGrath <bug1@optushome.com.au> 1 June 2000
*
* Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <fcntl.h>
#include <stdlib.h>
#include <getopt.h>
#include <unistd.h>
#include "busybox.h"
extern int ar_main(int argc, char **argv)
{
const int preserve_date = 1; /* preserve original dates */
const int verbose = 2; /* be verbose */
const int display = 4; /* display contents */
const int extract_to_file = 8; /* extract contents of archive */
const int extract_to_stdout = 16; /* extract to stdout */
int funct = 0, opt=0;
int srcFd=0, dstFd=0;
ar_headers_t head, *extract_list=NULL;
extract_list = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
while ((opt = getopt(argc, argv, "ovtpx")) != -1) {
switch (opt) {
case 'o':
funct |= preserve_date;
break;
case 'v':
funct |= verbose;
break;
case 't':
funct |= display;
break;
case 'p':
funct |= extract_to_stdout;
break;
case 'x':
funct |= extract_to_file;
break;
default:
show_usage();
}
}
/* check the src filename was specified */
if (optind == argc)
show_usage();
if ( (srcFd = open(argv[optind], O_RDONLY)) < 0)
error_msg_and_die("Cannot read %s", argv[optind]);
optind++;
head = get_ar_headers(srcFd);
/* find files to extract or display */
/* search through argv and build extract list */
for (;optind<argc; optind++) {
ar_headers_t *ar_entry;
ar_entry = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
ar_entry = &head;
while (ar_entry->next != NULL) {
if (strcmp(argv[optind], ar_entry->name) == 0) {
ar_headers_t *tmp;
tmp = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
*tmp = *extract_list;
*extract_list = *ar_entry;
extract_list->next = tmp;
break;
}
ar_entry=ar_entry->next;
}
}
/* if individual files not found extract all files */
if (extract_list->next==NULL) {
extract_list = &head;
}
/* find files to extract or display */
while (extract_list->next != NULL) {
if (funct & extract_to_file) {
dstFd = open(extract_list->name, O_WRONLY | O_CREAT, extract_list->mode);
}
else if (funct & extract_to_stdout) {
dstFd = fileno(stdout);
}
if ((funct & extract_to_file) || (funct & extract_to_stdout)) {
lseek(srcFd, extract_list->offset, SEEK_SET);
copy_file_chunk(srcFd, dstFd, (off_t) extract_list->size);
}
if (funct & verbose) {
printf("%s %d/%d %8d %s ", mode_string(extract_list->mode),
extract_list->uid, extract_list->gid,
(int) extract_list->size, time_string(extract_list->mtime));
}
if ((funct & display) || (funct & verbose)){
printf("%s\n", extract_list->name);
}
extract_list=extract_list->next;
}
return EXIT_SUCCESS;
}
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