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/*
* A minimalistic tar archiver for sigtool and freshclam.
* Copyright (C) 2015 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
* Copyright (C) 2007 Sourcefire, Inc.
* Author: Tomasz Kojm <tkojm@clamav.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
#if HAVE_CONFIG_H
#include "clamav-config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <zlib.h>
#include "libclamav/clamav.h"
#include "tar.h"
struct tar_header {
char name[100]; /* File name */
char mode[8]; /* File mode */
char uid[8]; /* UID */
char gid[8]; /* GID */
char size[12]; /* File size (octal) */
char mtime[12]; /* Last modification */
char chksum[8]; /* Header checksum */
char type[1]; /* File type */
char lname[100]; /* Linked file name */
char pad[255];
};
#define TARBLK 512
int tar_addfile(int fd, gzFile gzs, const char *file)
{
int s, bytes;
struct tar_header hdr;
STATBUF sb;
unsigned char buff[FILEBUFF], *pt;
unsigned int i, chksum = 0;
if((s = open(file, O_RDONLY|O_BINARY)) == -1)
return -1;
if(FSTAT(s, &sb) == -1) {
close(s);
return -1;
}
memset(&hdr, 0, TARBLK);
strncpy(hdr.name, file, 100);
hdr.name[99]='\0';
snprintf(hdr.size, 12, "%o", (unsigned int) sb.st_size);
pt = (unsigned char *) &hdr;
for(i = 0; i < TARBLK; i++)
chksum += *pt++;
snprintf(hdr.chksum, 8, "%06o", chksum + 256);
if(gzs) {
if(!gzwrite(gzs, &hdr, TARBLK)) {
close(s);
return -1;
}
} else {
if(write(fd, &hdr, TARBLK) != TARBLK) {
close(s);
return -1;
}
}
while((bytes = read(s, buff, FILEBUFF)) > 0) {
if(gzs) {
if(!gzwrite(gzs, buff, bytes)) {
close(s);
return -1;
}
} else {
if(write(fd, buff, bytes) != bytes) {
close(s);
return -1;
}
}
}
close(s);
if(sb.st_size % TARBLK) {
memset(&hdr, 0, TARBLK);
if(gzs) {
if(!gzwrite(gzs, &hdr, TARBLK - (sb.st_size % TARBLK)))
return -1;
} else {
if(write(fd, &hdr, TARBLK - (sb.st_size % TARBLK)) == -1)
return -1;
}
}
return 0;
}
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