72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
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/* Copyright 1996-1999,2001,2002,2009 Alain Knaff.
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* This file is part of mtools.
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*
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* Mtools is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Mtools 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 Mtools. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "sysincludes.h"
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#include "msdos.h"
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#include "mtools.h"
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#include "file.h"
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#include "llong.h"
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/*
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* Copy the data from source to target
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*/
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mt_off_t copyfile(Stream_t *Source, Stream_t *Target)
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{
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char buffer[8*16384];
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mt_off_t pos;
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ssize_t ret;
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ssize_t retw;
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if (!Source){
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fprintf(stderr,"Couldn't open source file\n");
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return -1;
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}
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if (!Target){
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fprintf(stderr,"Couldn't open target file\n");
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return -1;
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}
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pos = 0;
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while(1){
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ret = READS(Source, buffer, 8*16384);
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if (ret < 0 ){
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perror("file read");
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return -1;
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}
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if(!ret)
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break;
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if(got_signal)
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return -1;
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if (ret == 0)
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break;
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if ((retw = force_write(Target, buffer, (size_t) ret)) != ret){
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if(retw < 0 )
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perror("write in copy");
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else
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fprintf(stderr,
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"Short write %zd instead of %zd\n",
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retw, ret);
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if(errno == ENOSPC)
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got_signal = 1;
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return ret;
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}
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pos += ret;
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}
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return pos;
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}
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