diff options
| -rw-r--r-- | archival/libunarchive/get_header_tar.c | 33 |
1 files changed, 24 insertions, 9 deletions
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c index fbca0f2..013450a 100644 --- a/archival/libunarchive/get_header_tar.c +++ b/archival/libunarchive/get_header_tar.c @@ -16,6 +16,11 @@ * FIXME: Better checking required in oldcompatability mode, * the file db.1.85.tar.gz from sleepycat.com has trailing garbage * GNU tar can handle it, busybox tar reports invalid tar header. + * + * References: + * GNU tar and star man pages, + * Opengroup's ustar interchange format, + * http://www.opengroup.org/onlinepubs/007904975/utilities/pax.html */ #include <stdio.h> @@ -122,6 +127,14 @@ extern char get_header_tar(archive_handle_t *archive_handle) /* Fix mode, used by the old format */ switch (tar.formated.typeflag) { + /* busybox identifies hard links as being regular files with 0 size and a link name */ + case '1': + file_header->mode &= (S_IFREG | 07777); + break; + case 'x': + case 'g': + bb_error_msg_and_die("pax is not tar"); + break; #ifdef CONFIG_FEATURE_TAR_OLDGNU_COMPATABILITY case 0: case '0': @@ -146,11 +159,11 @@ extern char get_header_tar(archive_handle_t *archive_handle) case '6': file_header->mode |= S_IFIFO; break; -#endif - /* hard links are detected as regular files with 0 size and a link name */ - case '1': - file_header->mode &= (S_IFREG | 07777); + case '7': + /* Reserved for high performance files, treat as normal file */ + file_header->mode |= S_IFREG; break; +#endif #ifdef CONFIG_FEATURE_TAR_GNU_EXTENSIONS case 'L': { longname = xmalloc(file_header->size + 1); @@ -169,13 +182,15 @@ extern char get_header_tar(archive_handle_t *archive_handle) file_header->name = linkname; return(get_header_tar(archive_handle)); } - case 'D': - case 'M': - case 'N': - case 'S': - case 'V': + case 'D': /* GNU dump dir */ + case 'M': /* Continuation of multi volume archive*/ + case 'N': /* Old GNU for names > 100 characters */ + case 'S': /* Sparse file */ + case 'V': /* Volume header */ bb_error_msg("Ignoring GNU extension type %c", tar.formated.typeflag); #endif + default: + bb_error_msg("Unknown typeflag: 0x%x", tar.formated.typeflag); } { /* Strip trailing '/' in directories */ /* Must be done after mode is set as '/' is used to check if its a directory */ |