| #include "cache.h" |
| |
| int copy_fd(int ifd, int ofd) |
| { |
| while (1) { |
| char buffer[8192]; |
| char *buf = buffer; |
| ssize_t len = xread(ifd, buffer, sizeof(buffer)); |
| if (!len) |
| break; |
| if (len < 0) { |
| int read_error = errno; |
| close(ifd); |
| return error("copy-fd: read returned %s", |
| strerror(read_error)); |
| } |
| while (len) { |
| int written = xwrite(ofd, buf, len); |
| if (written > 0) { |
| buf += written; |
| len -= written; |
| } |
| else if (!written) { |
| close(ifd); |
| return error("copy-fd: write returned 0"); |
| } else { |
| int write_error = errno; |
| close(ifd); |
| return error("copy-fd: write returned %s", |
| strerror(write_error)); |
| } |
| } |
| } |
| close(ifd); |
| 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); |
| if (close(fdo) != 0) |
| return error("%s: close error: %s", dst, strerror(errno)); |
| |
| if (!status && adjust_shared_perm(dst)) |
| return -1; |
| |
| return status; |
| } |