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Commit | Line | Data |
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f3123c4a JH |
1 | #include "cache.h" |
2 | ||
3 | int 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)); |
f3123c4a JH |
10 | if (!len) |
11 | break; | |
12 | if (len < 0) { | |
e6c64fc1 | 13 | int read_error; |
e6c64fc1 JH |
14 | read_error = errno; |
15 | close(ifd); | |
f3123c4a | 16 | return error("copy-fd: read returned %s", |
e6c64fc1 | 17 | strerror(read_error)); |
f3123c4a | 18 | } |
1c15afb9 JH |
19 | while (len) { |
20 | int written = xwrite(ofd, buf, len); | |
f3123c4a JH |
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"); |
1c15afb9 JH |
27 | else |
28 | return error("copy-fd: write returned %s", | |
29 | strerror(errno)); | |
f3123c4a JH |
30 | } |
31 | } | |
32 | close(ifd); | |
33 | return 0; | |
34 | } | |
35 |