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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; | |
9 | len = read(ifd, buffer, sizeof(buffer)); | |
10 | if (!len) | |
11 | break; | |
12 | if (len < 0) { | |
e6c64fc1 | 13 | int read_error; |
f3123c4a JH |
14 | if (errno == EAGAIN) |
15 | continue; | |
e6c64fc1 JH |
16 | read_error = errno; |
17 | close(ifd); | |
f3123c4a | 18 | return error("copy-fd: read returned %s", |
e6c64fc1 | 19 | strerror(read_error)); |
f3123c4a JH |
20 | } |
21 | while (1) { | |
22 | int written = write(ofd, buf, len); | |
23 | if (written > 0) { | |
24 | buf += written; | |
25 | len -= written; | |
26 | if (!len) | |
27 | break; | |
28 | } | |
29 | if (!written) | |
30 | return error("copy-fd: write returned 0"); | |
31 | if (errno == EAGAIN || errno == EINTR) | |
32 | continue; | |
33 | return error("copy-fd: write returned %s", | |
34 | strerror(errno)); | |
35 | } | |
36 | } | |
37 | close(ifd); | |
38 | return 0; | |
39 | } | |
40 |