wok-next view eudev/stuff/udev/write_net_rules @ rev 19893

Up: gpicview, harfbuzz, libfm-extra, libfm, libwmf, libxklavier, libxml++, libzip, lxappearance, lxlauncher, lxrandr, lxtask, pcmanfm, xarchiver; add: lxhotkey, webkit2gtk, webkitgtk.
author Aleksej Bobylev <al.bobylev@gmail.com>
date Wed Oct 11 21:43:20 2017 +0300 (2017-10-11)
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1 #!/bin/sh -e
3 # This script is run to create persistent network device naming rules
4 # based on properties of the device.
5 # If the interface needs to be renamed, INTERFACE_NEW=<name> will be printed
6 # on stdout to allow udev to IMPORT it.
8 # variables used to communicate:
9 # MATCHADDR MAC address used for the match
10 # MATCHID bus_id used for the match
11 # MATCHDEVID dev_id used for the match
12 # MATCHDRV driver name used for the match
13 # MATCHIFTYPE interface type match
14 # COMMENT comment to add to the generated rule
15 # INTERFACE_NAME requested name supplied by external tool
16 # INTERFACE_NEW new interface name returned by rule writer
18 # Copyright (C) 2006 Marco d'Itri <md@Linux.IT>
19 # Copyright (C) 2007 Kay Sievers <kay.sievers@vrfy.org>
20 #
21 # This program is free software: you can redistribute it and/or modify
22 # it under the terms of the GNU General Public License as published by
23 # the Free Software Foundation, either version 2 of the License, or
24 # (at your option) any later version.
25 #
26 # This program is distributed in the hope that it will be useful,
27 # but WITHOUT ANY WARRANTY; without even the implied warranty of
28 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
29 # GNU General Public License for more details.
30 #
31 # You should have received a copy of the GNU General Public License
32 # along with this program. If not, see <http://www.gnu.org/licenses/>.
34 # debug, if UDEV_LOG=<debug>
35 if [ -n "$UDEV_LOG" ]; then
36 if [ "$UDEV_LOG" -ge 7 ]; then
37 set -x
38 fi
39 fi
41 RULES_FILE='/etc/udev/rules.d/70-persistent-net.rules'
43 . /lib/udev/rule_generator.functions
45 interface_name_taken() {
46 local value="$(find_all_rules 'NAME=' $INTERFACE)"
47 if [ "$value" ]; then
48 return 0
49 else
50 return 1
51 fi
52 }
54 find_next_available() {
55 raw_find_next_available "$(find_all_rules 'NAME=' "$1")"
56 }
58 write_rule() {
59 local match="$1"
60 local name="$2"
61 local comment="$3"
63 {
64 if [ "$PRINT_HEADER" ]; then
65 PRINT_HEADER=
66 echo "# This file was automatically generated by the $0"
67 echo "# program, run by the persistent-net-generator.rules rules file."
68 echo "#"
69 echo "# You can modify it, as long as you keep each rule on a single"
70 echo "# line, and change only the value of the NAME= key."
71 fi
73 echo ""
74 [ "$comment" ] && echo "# $comment"
75 echo "SUBSYSTEM==\"net\", ACTION==\"add\"$match, NAME=\"$name\""
76 } >> $RULES_FILE
77 }
79 if [ -z "$INTERFACE" ]; then
80 echo "missing \$INTERFACE" >&2
81 exit 1
82 fi
84 # Prevent concurrent processes from modifying the file at the same time.
85 lock_rules_file
87 # Check if the rules file is writeable.
88 choose_rules_file
90 # the DRIVERS key is needed to not match bridges and VLAN sub-interfaces
91 if [ "$MATCHADDR" ]; then
92 match="$match, DRIVERS==\"?*\", ATTR{address}==\"$MATCHADDR\""
93 fi
95 if [ "$MATCHDRV" ]; then
96 match="$match, DRIVERS==\"$MATCHDRV\""
97 fi
99 if [ "$MATCHDEVID" ]; then
100 match="$match, ATTR{dev_id}==\"$MATCHDEVID\""
101 fi
103 if [ "$MATCHID" ]; then
104 match="$match, KERNELS==\"$MATCHID\""
105 fi
107 if [ "$MATCHIFTYPE" ]; then
108 match="$match, ATTR{type}==\"$MATCHIFTYPE\""
109 fi
111 if [ -z "$match" ]; then
112 echo "missing valid match" >&2
113 unlock_rules_file
114 exit 1
115 fi
117 basename=${INTERFACE%%[0-9]*}
119 if [ "$INTERFACE_NAME" ]; then
120 # external tools may request a custom name
121 COMMENT="$COMMENT (custom name provided by external tool)"
122 if [ "$INTERFACE_NAME" != "$INTERFACE" ]; then
123 INTERFACE=$INTERFACE_NAME;
124 echo "INTERFACE_NEW=$INTERFACE"
125 fi
126 else
127 # if a rule using the current name already exists, find a new name
128 if interface_name_taken; then
129 INTERFACE="$basename$(find_next_available "$basename[0-9]*")"
130 # prevent INTERFACE from being "eth" instead of "eth0"
131 [ "$INTERFACE" = "${INTERFACE%%[ \[\]0-9]*}" ] && INTERFACE=${INTERFACE}0
132 echo "INTERFACE_NEW=$INTERFACE"
133 fi
134 fi
136 write_rule "$match" "$INTERFACE" "$COMMENT"
138 unlock_rules_file
140 exit 0