| 1 | #include "git-compat-util.h" |
| 2 | #include "copy.h" |
| 3 | #include "path.h" |
| 4 | #include "gettext.h" |
| 5 | #include "strbuf.h" |
| 6 | #include "abspath.h" |
| 7 | |
| 8 | int copy_fd(int ifd, int ofd) |
| 9 | { |
| 10 | while (1) { |
| 11 | char buffer[8192]; |
| 12 | ssize_t len = xread(ifd, buffer, sizeof(buffer)); |
| 13 | if (!len) |
| 14 | break; |
| 15 | if (len < 0) |
| 16 | return COPY_READ_ERROR; |
| 17 | if (write_in_full(ofd, buffer, len) < 0) |
| 18 | return COPY_WRITE_ERROR; |
| 19 | } |
| 20 | return 0; |
| 21 | } |
| 22 | |
| 23 | static int copy_times(const char *dst, const char *src) |
| 24 | { |
| 25 | struct stat st; |
| 26 | struct utimbuf times; |
| 27 | if (stat(src, &st) < 0) |
| 28 | return -1; |
| 29 | times.actime = st.st_atime; |
| 30 | times.modtime = st.st_mtime; |
| 31 | if (utime(dst, ×) < 0) |
| 32 | return -1; |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | int copy_file(struct repository *repo, |
| 37 | const char *dst, const char *src, int mode) |
| 38 | { |
| 39 | int fdi, fdo, status; |
| 40 | |
| 41 | mode = (mode & 0111) ? 0777 : 0666; |
| 42 | if ((fdi = open(src, O_RDONLY)) < 0) |
| 43 | return fdi; |
| 44 | if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) { |
| 45 | close(fdi); |
| 46 | return fdo; |
| 47 | } |
| 48 | status = copy_fd(fdi, fdo); |
| 49 | switch (status) { |
| 50 | case COPY_READ_ERROR: |
| 51 | error_errno("copy-fd: read returned"); |
| 52 | break; |
| 53 | case COPY_WRITE_ERROR: |
| 54 | error_errno("copy-fd: write returned"); |
| 55 | break; |
| 56 | } |
| 57 | close(fdi); |
| 58 | if (close(fdo) != 0) |
| 59 | return error_errno("%s: close error", dst); |
| 60 | |
| 61 | if (!status && adjust_shared_perm(repo, dst)) |
| 62 | return -1; |
| 63 | |
| 64 | return status; |
| 65 | } |
| 66 | |
| 67 | int copy_file_with_time(struct repository *repo, |
| 68 | const char *dst, const char *src, int mode) |
| 69 | { |
| 70 | int status = copy_file(repo, dst, src, mode); |
| 71 | if (!status) |
| 72 | return copy_times(dst, src); |
| 73 | return status; |
| 74 | } |