linux-kernel - [PATCH bpf-next] samples: bpf: Use "grep -E" instead of "egrep"

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Message-Id: <1668765001-12477-1-git-send-email-yangtiezhu@loongson.cn>
Date:   Fri, 18 Nov 2022 17:50:01 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next] samples: bpf: Use "grep -E" instead of "egrep"

The latest version of grep claims the egrep is now obsolete so the build
now contains warnings that look like:
	egrep: warning: egrep is obsolescent; using grep -E
fix this up by moving the related file to use "grep -E" instead.

  sed -i "s/egrep/grep -E/g" `grep egrep -rwl samples/bpf`

Here are the steps to install the latest grep:

  wget http://ftp.gnu.org/gnu/grep/grep-3.8.tar.gz
  tar xf grep-3.8.tar.gz
  cd grep-3.8 && ./configure && make
  sudo make install
  export PATH=/usr/local/bin:$PATH

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 samples/bpf/test_cgrp2_tc.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/samples/bpf/test_cgrp2_tc.sh b/samples/bpf/test_cgrp2_tc.sh
index 12faf58..395573b 100755
--- a/samples/bpf/test_cgrp2_tc.sh
+++ b/samples/bpf/test_cgrp2_tc.sh
@@ -115,7 +115,7 @@ do_exit() {
     if [ "$DEBUG" == "yes" ] && [ "$MODE" != 'cleanuponly' ]
     then
 	echo "------ DEBUG ------"
-	echo "mount: "; mount | egrep '(cgroup2|bpf)'; echo
+	echo "mount: "; mount | grep -E '(cgroup2|bpf)'; echo
 	echo "$CGRP2_TC_LEAF: "; ls -l $CGRP2_TC_LEAF; echo
 	if [ -d "$BPF_FS_TC_SHARE" ]
 	then
-- 
2.1.0