116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*****************************************************************************
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*
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* $Id: unpacker.c,v 1.13 2005/08/27 18:53:33 mbse Exp $
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* Purpose ...............: Archive unpacker
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*
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*****************************************************************************
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* Copyright (C) 1997-2005
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*
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* Michiel Broek FIDO: 2:280/2802
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* Beekmansbos 10
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* 1971 BV IJmuiden
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* the Netherlands
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*
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* This file is part of MBSE BBS.
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*
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* This BBS is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2, or (at your option) any
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* later version.
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*
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* MBSE BBS is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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 MBSE BBS; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*****************************************************************************/
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#include "../config.h"
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#include "mbselib.h"
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char *unpacker(char *fn)
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{
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FILE *fp;
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unsigned char buf[8];
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if ((fp = fopen(fn,"r")) == NULL) {
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WriteError("$Could not open file %s", fn);
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return NULL;
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}
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if (fread(buf,1,sizeof(buf),fp) != sizeof(buf)) {
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WriteError("$Could not read head of the file %s", fn);
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fclose(fp);
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return NULL;
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}
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fclose(fp);
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if (memcmp(buf,"PK\003\004",4) == 0) return (char *)"ZIP";
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if (*buf == 0x1a) return (char *)"ARC";
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if (memcmp(buf+2,"-l",2) == 0) return (char *)"LHA";
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if (memcmp(buf,"ZOO",3) == 0) return (char *)"ZOO";
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if (memcmp(buf,"`\352",2) == 0) return (char *)"ARJ";
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if (memcmp(buf,"Rar!",4) == 0) return (char *)"RAR";
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if (memcmp(buf,"HA",2) == 0) return (char *)"HA";
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if (memcmp(buf,"UC2\0x1a",4) == 0) return (char *)"UC2";
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if (memcmp(buf,"BZ",2) == 0) return (char *)"BZIP";
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if (memcmp(buf,"MSCF",4) == 0) return (char *)"CAB"; /* M$ CAB files */
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if (memcmp(buf,"\037\213",2) == 0) return (char *)"GZIP"; /* gzip compressed data */
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if (memcmp(buf,"\037\235",2) == 0) return (char *)"CMP"; /* unix compressed data */
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if ((fp = fopen(fn,"r"))) {
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fseek(fp, 257, SEEK_SET);
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if (fread(buf, 1, sizeof(buf), fp) != sizeof(buf)) {
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/*
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* Here we don't complain about a read error, the file may be
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* smaller then 257 bytes so it is not a tar file anyway.
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*/
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fclose(fp);
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return NULL;
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}
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fclose(fp);
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}
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if (memcmp(buf,"ustar",5) == 0) return (char *)"TAR"; /* GNU/Posix tar */
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return NULL;
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}
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int getarchiver(char *unarc)
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{
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FILE *fp;
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char *filename;
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memset(&archiver, 0, sizeof(archiver));
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filename = calloc(PATH_MAX, sizeof(char));
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snprintf(filename, PATH_MAX -1, "%s/etc/archiver.data", getenv("MBSE_ROOT"));
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if ((fp = fopen(filename, "r")) == NULL) {
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WriteError("$Can't open %s", filename);
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free(filename);
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return FALSE;
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}
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free(filename);
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fread(&archiverhdr, sizeof(archiverhdr), 1, fp);
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while (fread(&archiver, archiverhdr.recsize, 1, fp) == 1) {
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if ((archiver.available) && (strcmp(archiver.name, unarc) == 0)) {
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fclose(fp);
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return TRUE;
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}
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}
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fclose(fp);
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return FALSE;
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}
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