libtar: backup and restore posix capabilities
This patch also allows libtar to combine data from multiple extended
tar headers into a single header.
Change-Id: I82d13e89a3622ea665b60062b1904ddbedfa41b3
diff --git a/libtar/extract.c b/libtar/extract.c
index ba29a77..9e24e8e 100644
--- a/libtar/extract.c
+++ b/libtar/extract.c
@@ -20,6 +20,10 @@
#include <errno.h>
#include <utime.h>
+#include <sys/capability.h>
+#include <sys/xattr.h>
+#include <linux/xattr.h>
+
#ifdef STDC_HEADERS
# include <stdlib.h>
#endif
@@ -166,6 +170,16 @@
}
#endif
+ if((t->options & TAR_STORE_POSIX_CAP) && t->th_buf.has_cap_data)
+ {
+#if 1 //def DEBUG
+ printf("tar_extract_file(): restoring posix capabilities to file %s\n", realname);
+ print_caps(&t->th_buf.cap_data);
+#endif
+ if (setxattr(realname, XATTR_NAME_CAPS, &t->th_buf.cap_data, sizeof(struct vfs_cap_data), 0) < 0)
+ fprintf(stderr, "tar_extract_file(): failed to restore posix capabilities to file %s !!!\n", realname);
+ }
+
#ifdef LIBTAR_FILE_HASH
pn = th_get_pathname(t);
pathname_len = strlen(pn) + 1;