diff options
Diffstat (limited to 'src/util.c')
| -rw-r--r-- | src/util.c | 14 |
1 files changed, 11 insertions, 3 deletions
@@ -388,7 +388,7 @@ create_backup (char const *to, const struct stat *to_st, bool leave_original) try_makedirs_errno = ENOENT; safe_unlink (bakname); - while ((fd = safe_open (bakname, O_CREAT | O_WRONLY | O_TRUNC, 0666)) < 0) + while ((fd = safe_open (bakname, O_CREAT | O_EXCL | O_WRONLY | O_TRUNC, 0666)) < 0) { if (errno != try_makedirs_errno) pfatal ("Can't create file %s", quotearg (bakname)); @@ -579,10 +579,13 @@ create_file (char const *file, int open_flags, mode_t mode, static void copy_to_fd (const char *from, int tofd) { + int from_flags = O_RDONLY | O_BINARY; int fromfd; ssize_t i; - if ((fromfd = safe_open (from, O_RDONLY | O_BINARY, 0)) < 0) + if (! follow_symlinks) + from_flags |= O_NOFOLLOW; + if ((fromfd = safe_open (from, from_flags, 0)) < 0) pfatal ("Can't reopen file %s", quotearg (from)); while ((i = read (fromfd, buf, bufsize)) != 0) { @@ -625,6 +628,8 @@ copy_file (char const *from, char const *to, struct stat *tost, else { assert (S_ISREG (mode)); + if (! follow_symlinks) + to_flags |= O_NOFOLLOW; tofd = create_file (to, O_WRONLY | O_BINARY | to_flags, mode, to_dir_known_to_exist); copy_to_fd (from, tofd); @@ -640,9 +645,12 @@ copy_file (char const *from, char const *to, struct stat *tost, void append_to_file (char const *from, char const *to) { + int to_flags = O_WRONLY | O_APPEND | O_BINARY; int tofd; - if ((tofd = safe_open (to, O_WRONLY | O_BINARY | O_APPEND, 0)) < 0) + if (! follow_symlinks) + to_flags |= O_NOFOLLOW; + if ((tofd = safe_open (to, to_flags, 0)) < 0) pfatal ("Can't reopen file %s", quotearg (to)); copy_to_fd (from, tofd); if (close (tofd) != 0) |