diff options
| -rw-r--r-- | libbb/copy_file.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/libbb/copy_file.c b/libbb/copy_file.c index 7ddb9a23f..637b8179b 100644 --- a/libbb/copy_file.c +++ b/libbb/copy_file.c @@ -65,12 +65,28 @@ int copy_file(const char *source, const char *dest, int flags) DIR *dp; struct dirent *d; mode_t saved_umask = 0; + char *dstparent; + struct stat dstparent_stat; if (!(flags & FILEUTILS_RECUR)) { bb_error_msg("%s: omitting directory", source); return -1; } + dstparent = dirname(bb_xstrdup(dest)); + if (lstat(dstparent, &dstparent_stat) < 0) { + bb_perror_msg("unable to stat `%s'", dstparent); + free(dstparent); + return -1; + } + free(dstparent); + + if (source_stat.st_dev == dstparent_stat.st_dev && + source_stat.st_ino == dstparent_stat.st_ino) { + bb_error_msg("cannot copy a directory, `%s', into itself, `%s'", source, dest); + return -1; + } + /* Create DEST. */ if (dest_exists) { if (!S_ISDIR(dest_stat.st_mode)) { |