用Bash解析dhcpd.lease文件 [英] Parse a dhcpd.lease File with Bash
问题描述
lease 192.168.20.4 {
starts 6 2009/06/27 00:40 ：00;
结束6 2009/06/27 12:40:00;
硬件以太网00：00：00：00：00：00;
uid 00：00：00：00：00：00;
client-hostnameexamle-workstation1;
}
我得到的所有信息都是MAC，我想要的是IP和客户端主机名。但也许，没有客户端主机名。该条目看起来像这样：
lease 192.168.20.5 {
starts 6 2009/06/27 00:40： 00;
结束6 2009/06/27 12:40:00;
硬件以太网00：00：00：00：00：00;
}
我的第一个想法是grep的租赁属性，硬件以太网属性和uid属性并将其全部放在一行上。然后解析它。
但是我的问题是，我有一个很多文件中分配了很多条目的大文件。树看起来像这样：
dhcpd-leases
- 192.168.20.0
- 192.168。 30.0
- 192.168.40.0
[...]
我得到的是MAC从另一个文件解析到列表中。因此，我从这个列表开始，希望用我的MAC grep属性IP，MAC：
用于ENTRY的$ MACLIST
VAR $（catdhcpd-leases / 10.148。$ NETWORK.2 / dhcpd.leases| grep -E$ MAC | lease | client-hostname）
echo $ VAR
完成
但是由于$ VAR中有许多entrys，文件无法解析它的权利。
可以帮助吗？
最好的问候
Peter
假设你的maclist文件看起来像这样（例如只有一个条目） $ p> $ cat maclist
00：00：00：00：00：01
和您的租约文件就像这样
$ cat file
lease 192.168.20.4 {
开始6 2009/06/27 00:40:00;
结束6 2009/06/27 12:40:00;
硬件以太网00：00：00：00：00：00;
uid 00：00：00：00：00：00;
client-hostnameexamle-workstation1;
}
租赁192.168.20.5 {
开始6 2009/06/27 00:40:00;
结束6 2009/06/27 12:40:00;
硬件以太网00：00：00：00：00：00;
}
租赁192.168.20.6 {
开始6 2009/06/27 00:40:00;
结束6 2009/06/27 12:40:00;
硬件以太网00：00：00：00：00：01;
uid 00：00：00：00：00：01;
client-hostnameexamle-workstation2;
}
租赁192.168.20.7 {
开始6 2009/06/27 00:40:00;
结束6 2009/06/27 12:40:00;
硬件以太网01：00：00：00：00：00;
}
您可以试试这个
（$（getline line<maclist）> 0）{
mac [line]
} $ {
' b = b $ b RS =}
FS =\\\
}
/ lease / {
for（i = 1; i <= NF; i ++）{
gsub（;，，$ i）
if（$ i〜/ lease /）{
m = split（$ i，IP，）
ip如果（$ i〜/ hardware /）{
m = split（$ i，hw，）
ether = hw [3] $，那么= IP [2]
}
}
if（$ i〜/ client-hostname /）{
m = split（$ i，ch，）
hostname = ch [2]
}
if（$ i〜/ uid /）{
m = split（$ i，ui，）
uid = ui [2]
}
}
if（mac in ether）{
printip：iphostname：hostnameether：etheruid：uid
}
}'文件
输出
$ ./shell.sh
hostname：examle-workstation2ether：00：00：00：00：00：01 uid：00：00：00：00：01
I Try to parse my dhcpd.lease File with Basel. A typical entry looks like this:
lease 192.168.20.4 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 00:00:00:00:00:00;
uid 00:00:00:00:00:00;
client-hostname "examle-workstation1";
}
All information i get is the MAC and what i want ist the IP and the client-hostname. But maybe, there is no client-hostname. The entry looks like this:
lease 192.168.20.5 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 00:00:00:00:00:00;
}
My first idea was to grep the lease attribute, the hardware ethernet attribute and the uid attribute and putt it all on one line. And then parse it.
But my problem is, i have a big file with many entries allocated in many files. The tree looks like this:
dhcpd-leases
-- 192.168.20.0
-- 192.168.30.0
-- 192.168.40.0
[...]
And all what i get ist the MACs parsed from another files in to a list. So i start with this list and want to grep the Attributes ip, mac with my MAC:
for ENTRY in $MACLIST
do
VAR$(cat "dhcpd-leases/10.148.$NETWORK.2/dhcpd.leases" | grep -E "$MAC|lease|client-hostname")
echo $VAR
done
But it because of the many entrys in the $VAR and the files im unable to Parse it out right.
Can somenone help?
Best regards Peter
assuming your maclist file look like this (just one entry for example)
$ cat maclist
00:00:00:00:00:01
and your lease file like this
$ cat file
lease 192.168.20.4 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 00:00:00:00:00:00;
uid 00:00:00:00:00:00;
client-hostname "examle-workstation1";
}
lease 192.168.20.5 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 00:00:00:00:00:00;
}
lease 192.168.20.6 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 00:00:00:00:00:01;
uid 00:00:00:00:00:01;
client-hostname "examle-workstation2";
}
lease 192.168.20.7 {
starts 6 2009/06/27 00:40:00;
ends 6 2009/06/27 12:40:00;
hardware ethernet 01:00:00:00:00:00;
}
you can try this
awk 'BEGIN{
while( (getline line < "maclist") > 0){
mac[line]
}
RS="}"
FS="\n"
}
/lease/{
for(i=1;i<=NF;i++){
gsub(";","",$i)
if ($i ~ /lease/) {
m=split($i, IP," ")
ip=IP[2]
}
if( $i ~ /hardware/ ){
m=split($i, hw," ")
ether=hw[3]
}
if ( $i ~ /client-hostname/){
m=split($i,ch, " ")
hostname=ch[2]
}
if ( $i ~ /uid/){
m=split($i,ui, " ")
uid=ui[2]
}
}
if ( ether in mac ){
print "ip: "ip " hostname: "hostname " ether: "ether " uid: "uid
}
} ' file
output
$ ./shell.sh
hostname: "examle-workstation2" ether: 00:00:00:00:00:01 uid: 00:00:00:00:00:01
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