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authorDenis Vlasenko2008-02-13 17:52:42 +0000
committerDenis Vlasenko2008-02-13 17:52:42 +0000
commit23ffb6a4a2a01fe41abe4e42d46fa16bdc2603fd (patch)
tree2627bf7cfc0d748ec007f0d6a2d23ad1ff985c59 /archival/libunarchive/get_header_tar.c
parent6dd03f04ea3292d10ce06feda2f0c8272be0fb83 (diff)
downloadbusybox-23ffb6a4a2a01fe41abe4e42d46fa16bdc2603fd.zip
busybox-23ffb6a4a2a01fe41abe4e42d46fa16bdc2603fd.tar.gz
tar: compat: handle tarballs with only one zero block at the end
Diffstat (limited to 'archival/libunarchive/get_header_tar.c')
-rw-r--r--archival/libunarchive/get_header_tar.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/archival/libunarchive/get_header_tar.c b/archival/libunarchive/get_header_tar.c
index 274bd46..7493d91 100644
--- a/archival/libunarchive/get_header_tar.c
+++ b/archival/libunarchive/get_header_tar.c
@@ -90,7 +90,15 @@ char get_header_tar(archive_handle_t *archive_handle)
again_after_align:
- xread(archive_handle->src_fd, &tar, 512);
+ i = full_read(archive_handle->src_fd, &tar, 512);
+ /* if GNU tar sees EOF in above read, it says:
+ * "tar: A lone zero block at N", where N = kilobyte
+ * where EOF was met (not EOF block, actual EOF!),
+ * and tar will exit with error code 0! Mimic exit(0): */
+ if (i == 0)
+ xfunc_error_retval = 0;
+ if (i != 512)
+ bb_error_msg_and_die("short read");
archive_handle->offset += 512;
/* If there is no filename its an empty header */