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