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/* Copyright 1996-1999,2001,2002,2009 Alain Knaff.
* This file is part of mtools.
*
* Mtools 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 3 of the License, or
* (at your option) any later version.
*
* Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>.
*/
#include "sysincludes.h"
#include "msdos.h"
#include "mtools.h"
#include "file.h"
#include "llong.h"
/*
* Copy the data from source to target
*/
int copyfile(Stream_t *Source, Stream_t *Target)
{
char buffer[8*16384];
mt_off_t pos;
int ret;
ssize_t retw;
/* size_t len;*/
mt_size_t mt_len;
if (!Source){
fprintf(stderr,"Couldn't open source file\n");
return -1;
}
if (!Target){
fprintf(stderr,"Couldn't open target file\n");
return -1;
}
pos = 0;
GET_DATA(Source, 0, &mt_len, 0, 0);
while(1){
ret = READS(Source, buffer, (mt_off_t) pos, 8*16384);
if (ret < 0 ){
perror("file read");
return -1;
}
if(!ret)
break;
if(got_signal)
return -1;
if (ret == 0)
break;
if ((retw = force_write(Target, buffer,
(mt_off_t) pos, (size_t) ret)) != ret){
if(retw < 0 )
perror("write in copy");
else
fprintf(stderr,
"Short write %lu instead of %d\n",
(unsigned long) retw, ret);
if(errno == ENOSPC)
got_signal = 1;
return ret;
}
pos += ret;
}
return 0;
}
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