From 7118774ec94bb1a2e8ef7a5f8cbcb6b781ccfdd8 Mon Sep 17 00:00:00 2001
From: Ethan Yonker <dees_troy@teamw.in>
Date: Fri, 13 Jan 2017 13:30:10 -0600
Subject: 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
---
 libtar/extract.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'libtar/extract.c')

diff --git a/libtar/extract.c b/libtar/extract.c
index ba29a7771..9e24e8ee7 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 @@ tar_extract_file(TAR *t, const char *realname, const char *prefix, const int *pr
 	}
 #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;
-- 
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