Fix bug when handling debian packages.

If we read the contents of compressed files within the ar archive,
e.g. control.tar.gz, then file position gets all out of whack, so
it has to be reset before reading thenext header.

1 files changed, 5 insertions, 3 deletions

diff --git a/archival/libunarchive/get_header_ar.c b/archival/libunarchive/get_header_ar.c
index 6c576a8da..25fc83781 100644
--- a/archival/libunarchive/get_header_ar.c
+++ b/archival/libunarchive/get_header_ar.c
@@ -45,7 +45,7 @@ extern char get_header_ar(archive_handle_t *archive_handle)
 	if (read(archive_handle->src_fd, ar.raw, 60) != 60) {
 		/* End Of File */
 		return(EXIT_FAILURE);
-		}
+	}
 
 	/* Some ar entries have a trailing '\n' after the previous data entry */
 	if (ar.raw[0] == '\n') {
@@ -55,7 +55,7 @@ extern char get_header_ar(archive_handle_t *archive_handle)
 		archive_handle->offset++;
 	}
 	archive_handle->offset += 60;
-		
+
 	/* align the headers based on the header magic */
 	if ((ar.formated.magic[0] != '`') || (ar.formated.magic[1] != '\n')) {
 		bb_error_msg_and_die("Invalid ar header");
@@ -115,7 +115,9 @@ extern char get_header_ar(archive_handle_t *archive_handle)
 		data_skip(archive_handle);			
 	}
 
-	archive_handle->offset += typed->size + 1;
+	archive_handle->offset += typed->size;
+	/* Set the file pointer to the correct spot, we may have been reading a compressed file */
+	lseek(archive_handle->src_fd, archive_handle->offset, SEEK_SET);
 
 	return(EXIT_SUCCESS);
 }