121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
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/*
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* A minimalistic tar archiver for sigtool and freshclam.
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*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2007-2013 Sourcefire, Inc.
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*
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* Author: Tomasz Kojm <tkojm@clamav.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <zlib.h>
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// libclamav
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#include "clamav.h"
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#include "tar.h"
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struct tar_header {
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char name[100]; /* File name */
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char mode[8]; /* File mode */
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char uid[8]; /* UID */
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char gid[8]; /* GID */
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char size[12]; /* File size (octal) */
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char mtime[12]; /* Last modification */
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char chksum[8]; /* Header checksum */
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char type[1]; /* File type */
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char lname[100]; /* Linked file name */
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char pad[255];
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};
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#define TARBLK 512
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int tar_addfile(int fd, gzFile gzs, const char *file)
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{
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int s, bytes;
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struct tar_header hdr;
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STATBUF sb;
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unsigned char buff[FILEBUFF], *pt;
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unsigned int i, chksum = 0;
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if ((s = open(file, O_RDONLY | O_BINARY)) == -1)
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return -1;
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if (FSTAT(s, &sb) == -1) {
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close(s);
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return -1;
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}
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memset(&hdr, 0, TARBLK);
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strncpy(hdr.name, file, 100);
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hdr.name[99] = '\0';
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snprintf(hdr.size, 12, "%o", (unsigned int)sb.st_size);
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pt = (unsigned char *)&hdr;
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for (i = 0; i < TARBLK; i++)
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chksum += *pt++;
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snprintf(hdr.chksum, 8, "%06o", chksum + 256);
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if (gzs) {
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if (!gzwrite(gzs, &hdr, TARBLK)) {
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close(s);
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return -1;
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}
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} else {
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if (write(fd, &hdr, TARBLK) != TARBLK) {
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close(s);
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return -1;
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}
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}
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while ((bytes = read(s, buff, FILEBUFF)) > 0) {
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if (gzs) {
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if (!gzwrite(gzs, buff, bytes)) {
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close(s);
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return -1;
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}
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} else {
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if (write(fd, buff, bytes) != bytes) {
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close(s);
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return -1;
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}
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}
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}
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close(s);
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if (sb.st_size % TARBLK) {
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memset(&hdr, 0, TARBLK);
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if (gzs) {
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if (!gzwrite(gzs, &hdr, TARBLK - (sb.st_size % TARBLK)))
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return -1;
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} else {
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if (write(fd, &hdr, TARBLK - (sb.st_size % TARBLK)) == -1)
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return -1;
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}
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}
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return 0;
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}
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