[gentoo-commits] proj/netifrc:master commit in: net/

["Lars Wendler" <polynomial-c@gentoo.org>]

commit:     6632c348cce8be19c7a960cabb2f6f41ec4c6d51
Author:     Kerin Millar <kfm <AT> plushkava <DOT> net>
AuthorDate: Sun Jan 24 02:49:43 2021 +0000
Commit:     Lars Wendler <polynomial-c <AT> gentoo <DOT> org>
CommitDate: Sun Jan 24 10:21:20 2021 +0000
URL:        https://gitweb.gentoo.org/proj/netifrc.git/commit/?id=6632c348

Use sysfs to obtain the MAC address in net/iproute2.sh

Dispense with the hideous ip-link(8) parser. Instead, collect the MAC
address by reading from the relevant sysfs file. While at it, tidy up
the remainder of the function so that the control flow is easier to
ascertain at a glance. Note that the address will be rendered in upper
case, just as it was before.

Signed-off-by: Kerin Millar <kfm <AT> plushkava.net>
Closes: https://bugs.gentoo.org/766758
Signed-off-by: Lars Wendler <polynomial-c <AT> gentoo.org>

 net/iproute2.sh | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/net/iproute2.sh b/net/iproute2.sh
index 4c32acc..2289587 100644
--- a/net/iproute2.sh
+++ b/net/iproute2.sh
@@ -70,19 +70,16 @@ _set_flag()
 
 _get_mac_address()
 {
-	local mac=$(LC_ALL=C ip link show "${IFACE}" | sed -n \
-		-e 'y/abcdef/ABCDEF/' \
-		-e '/link\// s/^.*\<\(..:..:..:..:..:..\)\>.*/\1/p')
+	local mac=
+	read -r mac < /sys/class/net/"${IFACE}"/address || return 1
 
 	case "${mac}" in
-		00:00:00:00:00:00);;
-		44:44:44:44:44:44);;
-		FF:FF:FF:FF:FF:FF);;
-		"");;
-		*) echo "${mac}"; return 0;;
+		00:00:00:00:00:00) return 1 ;;
+		44:44:44:44:44:44) return 1 ;;
+		ff:ff:ff:ff:ff:ff) return 1 ;;
 	esac
 
-	return 1
+	printf '%s\n' "${mac}" | LC_ALL=C tr '[:lower:]' '[:upper:]'
 }
 
 _set_mac_address()