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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) { | |
f3123c4a JH |
6 | char buffer[8192]; |
7 | char *buf = buffer; | |
8a912bcb | 8 | ssize_t len = xread(ifd, buffer, sizeof(buffer)); |
f3123c4a JH |
9 | if (!len) |
10 | break; | |
11 | if (len < 0) { | |
e6c64fc1 | 12 | int read_error; |
e6c64fc1 JH |
13 | read_error = errno; |
14 | close(ifd); | |
f3123c4a | 15 | return error("copy-fd: read returned %s", |
e6c64fc1 | 16 | strerror(read_error)); |
f3123c4a | 17 | } |
1c15afb9 JH |
18 | while (len) { |
19 | int written = xwrite(ofd, buf, len); | |
f3123c4a JH |
20 | if (written > 0) { |
21 | buf += written; | |
22 | len -= written; | |
f3123c4a | 23 | } |
08337a97 SR |
24 | else if (!written) { |
25 | close(ifd); | |
f3123c4a | 26 | return error("copy-fd: write returned 0"); |
08337a97 SR |
27 | } else { |
28 | close(ifd); | |
1c15afb9 JH |
29 | return error("copy-fd: write returned %s", |
30 | strerror(errno)); | |
08337a97 | 31 | } |
f3123c4a JH |
32 | } |
33 | } | |
34 | close(ifd); | |
35 | return 0; | |
36 | } | |
1468bd47 DB |
37 | |
38 | int copy_file(const char *dst, const char *src, int mode) | |
39 | { | |
40 | int fdi, fdo, status; | |
41 | ||
42 | mode = (mode & 0111) ? 0777 : 0666; | |
43 | if ((fdi = open(src, O_RDONLY)) < 0) | |
44 | return fdi; | |
45 | if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) { | |
46 | close(fdi); | |
47 | return fdo; | |
48 | } | |
49 | status = copy_fd(fdi, fdo); | |
50 | if (close(fdo) != 0) | |
51 | return error("%s: write error: %s", dst, strerror(errno)); | |
52 | ||
53 | if (!status && adjust_shared_perm(dst)) | |
54 | return -1; | |
55 | ||
56 | return status; | |
57 | } |