tar: add support for --overwrite. +70 bytes.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/archival/libunarchive/data_extract_all.c b/archival/libunarchive/data_extract_all.c
index ae242df64..874d37d94 100644
--- a/archival/libunarchive/data_extract_all.c
+++ b/archival/libunarchive/data_extract_all.c
@@ -72,8 +72,11 @@ void FAST_FUNC data_extract_all(archive_handle_t *archive_handle)
                 switch (file_header->mode & S_IFMT) {
                 case S_IFREG: {
                         /* Regular file */
+                        int flags = O_WRONLY | O_CREAT | O_EXCL;
+                        if (archive_handle->ah_flags & ARCHIVE_O_TRUNC)
+                                flags = O_WRONLY | O_CREAT | O_TRUNC;
                         dst_fd = xopen3(file_header->name,
-                                O_WRONLY | O_CREAT | O_EXCL,
+                                flags,
                                 file_header->mode
                                 );
                         bb_copyfd_exact_size(archive_handle->src_fd, dst_fd, file_header->size);