36 lines
688 B
36 lines
688 B
#include "cache.h" |
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int copy_fd(int ifd, int ofd) |
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{ |
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while (1) { |
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char buffer[8192]; |
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char *buf = buffer; |
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ssize_t len = xread(ifd, buffer, sizeof(buffer)); |
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if (!len) |
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break; |
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if (len < 0) { |
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int read_error; |
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read_error = errno; |
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close(ifd); |
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return error("copy-fd: read returned %s", |
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strerror(read_error)); |
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} |
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while (len) { |
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int written = xwrite(ofd, buf, len); |
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if (written > 0) { |
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buf += written; |
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len -= written; |
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} |
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else if (!written) { |
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close(ifd); |
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return error("copy-fd: write returned 0"); |
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} else { |
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close(ifd); |
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return error("copy-fd: write returned %s", |
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strerror(errno)); |
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} |
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} |
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} |
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close(ifd); |
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return 0; |
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}
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