39 lines
692 B
C
39 lines
692 B
C
#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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int len;
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char buffer[8192];
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char *buf = buffer;
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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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