!61 lxcfs_tools: hide error when isula info is abnormal

From: @vegbir 
Reviewed-by: @zhangsong234, @jingwoo 
Signed-off-by: @jingwoo

lxcfs-tools.spec

@@ -1,7 +1,7 @@
 #Basic Information
 Name:		lxcfs-tools
 Version:	0.3
-Release:	31
+Release:	32
 Summary:	toolkit for lxcfs to remount a running isulad
 License:    Mulan PSL v2
 URL:        https://gitee.com/openeuler/lxcfs-tools
@@ -13,11 +13,12 @@ Patch2: 0002-enable-external-linkmode-for-cgo-build.patch
 Patch3: 0003-retry-10-times-to-avoid-isulad-unavailable.patch
 Patch4: 0004-add-dt-test.patch
 Patch5: 0005-add-riscv64-to-syscall-build.patch
+
 %ifarch sw_64
-Patch6: lxcfs-tools-sw.patch
+Patch1000: lxcfs-tools-sw.patch
 %endif
 %ifarch loongarch64
-Patch7: add-loong64-support.patch
+Patch1001: add-loong64-support.patch
 %endif
 
 #Dependency
@@ -54,8 +55,8 @@ make tests
 %preun
 
 %post
-GRAPH=`isula info | grep -Eo "iSulad Root Dir:.+" | grep -Eo "\/.*"` 
-if [ "$GRAPH" == "" ]; then
+GRAPH=`isula info 2>/dev/null | grep -Eo "iSulad Root Dir:.+" | grep -Eo "\/.*"`
+if [ x"$GRAPH" == "x" ]; then
     GRAPH="/var/lib/isulad"
 fi
 
@@ -103,6 +104,12 @@ rm -rfv %{buildroot}
 
 
 %changelog
+* Wed Dec 27 2023 yangjiaqi <yangjiaqi16@huawei.com> - 0.3-32
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC:hide error when isula info is abnormal
+
 * Fri Aug 18 2023 panchenbo <panchenbo@kylinsec.com.cn> - 0.3-31
 - add loongarch64 support