| #include "cache.h" | |
| int copy_fd(int ifd, int ofd) | |
| { | |
| while (1) { | |
| char buffer[8192]; | |
| ssize_t len = xread(ifd, buffer, sizeof(buffer)); | |
| if (!len) | |
| break; | |
| if (len < 0) | |
| return COPY_READ_ERROR; | |
| if (write_in_full(ofd, buffer, len) < 0) | |
| return COPY_WRITE_ERROR; | |
| } | |
| return 0; | |
| } | |
| static int copy_times(const char *dst, const char *src) | |
| { | |
| struct stat st; | |
| struct utimbuf times; | |
| if (stat(src, &st) < 0) | |
| return -1; | |
| times.actime = st.st_atime; | |
| times.modtime = st.st_mtime; | |
| if (utime(dst, ×) < 0) | |
| return -1; | |
| return 0; | |
| } | |
| int copy_file(const char *dst, const char *src, int mode) | |
| { | |
| int fdi, fdo, status; | |
| mode = (mode & 0111) ? 0777 : 0666; | |
| if ((fdi = open(src, O_RDONLY)) < 0) | |
| return fdi; | |
| if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) { | |
| close(fdi); | |
| return fdo; | |
| } | |
| status = copy_fd(fdi, fdo); | |
| switch (status) { | |
| case COPY_READ_ERROR: | |
| error_errno("copy-fd: read returned"); | |
| break; | |
| case COPY_WRITE_ERROR: | |
| error_errno("copy-fd: write returned"); | |
| break; | |
| } | |
| close(fdi); | |
| if (close(fdo) != 0) | |
| return error_errno("%s: close error", dst); | |
| if (!status && adjust_shared_perm(dst)) | |
| return -1; | |
| return status; | |
| } | |
| int copy_file_with_time(const char *dst, const char *src, int mode) | |
| { | |
| int status = copy_file(dst, src, mode); | |
| if (!status) | |
| return copy_times(dst, src); | |
| return status; | |
| } |
