63 lines
1.1 KiB
C
Executable file
63 lines
1.1 KiB
C
Executable file
#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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int copyfile(Stream_t *Source, Stream_t *Target)
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{
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char buffer[8*16384];
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int pos;
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int ret, retw;
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size_t len;
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mt_size_t mt_len;
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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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GET_DATA(Source, 0, &mt_len, 0, 0);
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if (mt_len & ~max_off_t_31) {
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fprintf(stderr, "File too big\n");
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return -1;
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}
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len = truncBytes32(mt_len);
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while(1){
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ret = READS(Source, buffer, (mt_off_t) pos, 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, (mt_off_t) pos, 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 %d instead of %d\n", retw,
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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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