1/* Copyright 1996-1999,2001,2002,2009 Alain Knaff. 2 * This file is part of mtools. 3 * 4 * Mtools is free software: you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation, either version 3 of the License, or 7 * (at your option) any later version. 8 * 9 * Mtools is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with Mtools. If not, see <http://www.gnu.org/licenses/>. 16 */ 17#include "sysincludes.h" 18#include "msdos.h" 19#include "mtools.h" 20#include "file.h" 21#include "llong.h" 22 23/* 24 * Copy the data from source to target 25 */ 26 27int copyfile(Stream_t *Source, Stream_t *Target) 28{ 29 char buffer[8*16384]; 30 mt_off_t pos; 31 int ret, retw; 32/* size_t len;*/ 33 mt_size_t mt_len; 34 35 if (!Source){ 36 fprintf(stderr,"Couldn't open source file\n"); 37 return -1; 38 } 39 40 if (!Target){ 41 fprintf(stderr,"Couldn't open target file\n"); 42 return -1; 43 } 44 45 pos = 0; 46 GET_DATA(Source, 0, &mt_len, 0, 0); 47 while(1){ 48 ret = READS(Source, buffer, (mt_off_t) pos, 8*16384); 49 if (ret < 0 ){ 50 perror("file read"); 51 return -1; 52 } 53 if(!ret) 54 break; 55 if(got_signal) 56 return -1; 57 if (ret == 0) 58 break; 59 if ((retw = force_write(Target, buffer, (mt_off_t) pos, ret)) != ret){ 60 if(retw < 0 ) 61 perror("write in copy"); 62 else 63 fprintf(stderr, 64 "Short write %d instead of %d\n", retw, 65 ret); 66 if(errno == ENOSPC) 67 got_signal = 1; 68 return ret; 69 } 70 pos += ret; 71 } 72 return 0; 73} 74