diff options
Diffstat (limited to 'copy.c')
| -rw-r--r-- | copy.c | 50 |
1 files changed, 45 insertions, 5 deletions
@@ -3,15 +3,13 @@ int copy_fd(int ifd, int ofd) { while (1) { - int len; char buffer[8192]; char *buf = buffer; - len = xread(ifd, buffer, sizeof(buffer)); + ssize_t len = xread(ifd, buffer, sizeof(buffer)); if (!len) break; if (len < 0) { - int read_error; - read_error = errno; + int read_error = errno; close(ifd); return error("copy-fd: read returned %s", strerror(read_error)); @@ -26,9 +24,10 @@ int copy_fd(int ifd, int ofd) close(ifd); return error("copy-fd: write returned 0"); } else { + int write_error = errno; close(ifd); return error("copy-fd: write returned %s", - strerror(errno)); + strerror(write_error)); } } } @@ -36,3 +35,44 @@ int copy_fd(int ifd, int ofd) 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); + if (close(fdo) != 0) + return error("%s: close error: %s", dst, strerror(errno)); + + 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; +} |