[LTP] [PATCH] syscalls/sendmsg01: using 'ip' command to replace 'ifconfig'

[Zhouping L. <zl...@re...>]

'ip' tools is more general than 'ifconfig', and there are some
distros don't support to install 'ifconfig' tools under default,
which will cause such below error:

   sh: ifconfig: command not found
   sendmsg01    1  TBROK  :  ifconfig failed to bring up loop back device
   sendmsg01    2  TBROK  :  Remaining cases broken

the patch displaced 'ifconfig' using 'ip', and also the case need root
permission and checking capture unexpected signal.

Signed-off-by: Zhouping Liu <zl...@re...>
---
 testcases/kernel/syscalls/sendmsg/sendmsg01.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/testcases/kernel/syscalls/sendmsg/sendmsg01.c b/testcases/kernel/syscalls/sendmsg/sendmsg01.c
index e1424ca..2376e3e 100644
--- a/testcases/kernel/syscalls/sendmsg/sendmsg01.c
+++ b/testcases/kernel/syscalls/sendmsg/sendmsg01.c
@@ -573,6 +573,9 @@ static void setup(void)
 {
 
 	int ret = 0;
+
+	tst_require_root(NULL);
+	tst_sig(FORK, DEF_HANDLER, cleanup);
 	TEST_PAUSE;
 
 	/* initialize sockaddr's */
@@ -586,12 +589,12 @@ static void setup(void)
 	strcpy(sun1.sun_path, tmpsunpath);
 
 	/* this test will fail or in some cases hang if no eth or lo is
-	 * configured, so making sure in setup that atleast lo is up
+	 * configured, so making sure in setup that at least lo is up
 	 */
-	ret = system("ifconfig lo up 127.0.0.1");
+	ret = system("ip link set lo up");
 	if (WEXITSTATUS(ret) != 0) {
 		tst_brkm(TBROK, cleanup,
-			 "ifconfig failed to bring up loop back device");
+			 "ip failed to bring up loop back device");
 		tst_exit();
 	}
 
@@ -607,7 +610,6 @@ static void cleanup(void)
 	unlink(tmpsunpath);
 	TEST_CLEANUP;
 	tst_rmdir();
-
 }
 
 static void setup0(void)
-- 
1.7.11.7