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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 | char buffer[8192]; | |
7 | ssize_t len = xread(ifd, buffer, sizeof(buffer)); | |
8 | if (!len) | |
9 | break; | |
10 | if (len < 0) | |
11 | return COPY_READ_ERROR; | |
12 | if (write_in_full(ofd, buffer, len) < 0) | |
13 | return COPY_WRITE_ERROR; | |
14 | } | |
15 | return 0; | |
16 | } | |
17 | ||
18 | static int copy_times(const char *dst, const char *src) | |
19 | { | |
20 | struct stat st; | |
21 | struct utimbuf times; | |
22 | if (stat(src, &st) < 0) | |
23 | return -1; | |
24 | times.actime = st.st_atime; | |
25 | times.modtime = st.st_mtime; | |
26 | if (utime(dst, ×) < 0) | |
27 | return -1; | |
28 | return 0; | |
29 | } | |
30 | ||
31 | int copy_file(const char *dst, const char *src, int mode) | |
32 | { | |
33 | int fdi, fdo, status; | |
34 | ||
35 | mode = (mode & 0111) ? 0777 : 0666; | |
36 | if ((fdi = open(src, O_RDONLY)) < 0) | |
37 | return fdi; | |
38 | if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) { | |
39 | close(fdi); | |
40 | return fdo; | |
41 | } | |
42 | status = copy_fd(fdi, fdo); | |
43 | switch (status) { | |
44 | case COPY_READ_ERROR: | |
45 | error_errno("copy-fd: read returned"); | |
46 | break; | |
47 | case COPY_WRITE_ERROR: | |
48 | error_errno("copy-fd: write returned"); | |
49 | break; | |
50 | } | |
51 | close(fdi); | |
52 | if (close(fdo) != 0) | |
53 | return error_errno("%s: close error", dst); | |
54 | ||
55 | if (!status && adjust_shared_perm(dst)) | |
56 | return -1; | |
57 | ||
58 | return status; | |
59 | } | |
60 | ||
61 | int copy_file_with_time(const char *dst, const char *src, int mode) | |
62 | { | |
63 | int status = copy_file(dst, src, mode); | |
64 | if (!status) | |
65 | return copy_times(dst, src); | |
66 | return status; | |
67 | } |