45 lines
1.0 KiB
C
45 lines
1.0 KiB
C
#include <unistd.h>
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#include <ioall.h>
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#include "filecopy.h"
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#include "crc32.h"
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extern void notify_progress(int, int);
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int copy_file(int outfd, int infd, long long size, unsigned long *crc32)
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{
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char buf[4096];
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long long written = 0;
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int ret;
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int count;
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while (written < size) {
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if (size - written > sizeof(buf))
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count = sizeof buf;
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else
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count = size - written;
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ret = read(infd, buf, count);
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if (!ret)
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return COPY_FILE_READ_EOF;
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if (ret < 0)
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return COPY_FILE_READ_ERROR;
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/* acumulate crc32 if requested */
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if (crc32)
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*crc32 = Crc32_ComputeBuf(*crc32, buf, ret);
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if (!write_all(outfd, buf, ret))
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return COPY_FILE_WRITE_ERROR;
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notify_progress(ret, 0);
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written += ret;
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}
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return COPY_FILE_OK;
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}
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char * copy_file_status_to_str(int status)
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{
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switch (status) {
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case COPY_FILE_OK: return "OK";
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case COPY_FILE_READ_EOF: return "Unexpected end of data while reading";
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case COPY_FILE_READ_ERROR: return "Error reading";
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case COPY_FILE_WRITE_ERROR: return "Error writing";
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default: return "????????";
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}
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}
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