mirror of
https://github.com/systemd/systemd.git
synced 2024-11-05 06:52:22 +03:00
131 lines
3.1 KiB
Bash
131 lines
3.1 KiB
Bash
#!/bin/sh -e
|
|
#
|
|
# This script is run if the interface (recognized by its MAC address) lacks
|
|
# a rule for persistent naming.
|
|
#
|
|
# If there is already a persistent rule with that interface name then the
|
|
# current interface needs to be renamed.
|
|
#
|
|
# If the interface needs to be renamed, a NAME=value pair will be printed
|
|
# on stdout to allow udev to IMPORT it. Then a rule for the MAC address and
|
|
# interface name is written.
|
|
#
|
|
# (C) 2006 Marco d'Itri <md@Linux.IT>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU General Public License as published by the
|
|
# Free Software Foundation version 2 of the License.
|
|
|
|
RULES_FILE='/etc/udev/rules.d/70-persistent-net.rules'
|
|
|
|
. /lib/udev/rule_generator.functions
|
|
|
|
interface_name_taken() {
|
|
local value="$(find_all_rules 'NAME=' $INTERFACE)"
|
|
if [ "$value" ]; then
|
|
return 0
|
|
else
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
find_next_available() {
|
|
raw_find_next_available "$(find_all_rules 'NAME=' "$1")"
|
|
}
|
|
|
|
write_rule() {
|
|
local match="$1"
|
|
local name="$2"
|
|
local comment="$3"
|
|
|
|
{
|
|
if [ "$PRINT_HEADER" ]; then
|
|
PRINT_HEADER=
|
|
echo "# This file was automatically generated by the $0"
|
|
echo "# program, probably run by the persistent-net-generator.rules rules file."
|
|
echo "#"
|
|
echo "# You can modify it, as long as you keep each rule on a single line."
|
|
fi
|
|
|
|
echo ""
|
|
[ "$comment" ] && echo "# $comment"
|
|
echo "SUBSYSTEM==\"net\", $match, NAME=\"$name\""
|
|
} >> $RULES_FILE
|
|
}
|
|
|
|
# used only if $RULES_FILE is empty, like on installation
|
|
if [ "$1" = "all_interfaces" ]; then
|
|
if [ -e $RULES_FILE ]; then
|
|
printf "$RULES_FILE exists, persistent interface names\nnot saved.\n" >&2
|
|
exit 0
|
|
fi
|
|
|
|
if [ ! -e /sys/class/net/ ]; then
|
|
echo "/sys/class/net/ is not available, persistent interface names not saved." >&2
|
|
exit 0
|
|
fi
|
|
|
|
cd /sys/class/net/ || return 0
|
|
|
|
for INTERFACE in *; do
|
|
case $INTERFACE in
|
|
eth*|ath*|wlan*|ra*|sta*) ;;
|
|
*) continue ;;
|
|
esac
|
|
|
|
INTERFACE="$INTERFACE" DEVPATH="/class/net/$INTERFACE" \
|
|
/lib/udev/write_net_rules || true
|
|
done
|
|
|
|
exit 0
|
|
fi
|
|
|
|
if [ -z "$INTERFACE" ]; then
|
|
echo "Missing \$INTERFACE." >&2
|
|
exit 1
|
|
fi
|
|
|
|
if [ "$1" ]; then
|
|
MAC_ADDR="$1"
|
|
else
|
|
MAC_ADDR=$(sysread address)
|
|
fi
|
|
|
|
if [ -z "$MAC_ADDR" ]; then
|
|
echo "No MAC address for $INTERFACE." >&2
|
|
exit 1
|
|
fi
|
|
if [ "$MAC_ADDR" = "00:00:00:00:00:00" ]; then
|
|
echo "NULL MAC address for $INTERFACE." >&2
|
|
exit 1
|
|
fi
|
|
|
|
# Prevent concurrent processes from modifying the file at the same time.
|
|
lock_rules_file
|
|
|
|
# Check if the rules file is writeable.
|
|
choose_rules_file
|
|
|
|
# If a rule using the current name already exists then find a new name and
|
|
# report it to udev which will rename the interface.
|
|
basename=${INTERFACE%%[0-9]*}
|
|
if interface_name_taken; then
|
|
INTERFACE="$basename$(find_next_available "$basename[0-9]*")"
|
|
if [ ! -t 1 ]; then
|
|
echo "INTERFACE_NEW=$INTERFACE"
|
|
fi
|
|
fi
|
|
|
|
# the DRIVERS key is needed to not match bridges and VLAN sub-interfaces
|
|
match="DRIVERS==\"?*\", ATTRS{address}==\"$MAC_ADDR\""
|
|
if [ $basename = "ath" -o $basename = "wlan" ]; then
|
|
match="$match, ATTRS{type}==\"1\"" # do not match the wifi* interfaces
|
|
fi
|
|
|
|
write_rule "$match" "$INTERFACE" "$COMMENT"
|
|
|
|
unlock_rules_file
|
|
|
|
exit 0
|
|
|