Handle symlinks graciously
[git/git.git] / copy.c
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1#include "cache.h"
2
3int copy_fd(int ifd, int ofd)
4{
5 while (1) {
6 int len;
7 char buffer[8192];
8 char *buf = buffer;
1c15afb9 9 len = xread(ifd, buffer, sizeof(buffer));
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10 if (!len)
11 break;
12 if (len < 0) {
e6c64fc1 13 int read_error;
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14 read_error = errno;
15 close(ifd);
f3123c4a 16 return error("copy-fd: read returned %s",
e6c64fc1 17 strerror(read_error));
f3123c4a 18 }
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19 while (len) {
20 int written = xwrite(ofd, buf, len);
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21 if (written > 0) {
22 buf += written;
23 len -= written;
f3123c4a 24 }
1c15afb9 25 else if (!written)
f3123c4a 26 return error("copy-fd: write returned 0");
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27 else
28 return error("copy-fd: write returned %s",
29 strerror(errno));
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30 }
31 }
32 close(ifd);
33 return 0;
34}
35