使用sed设置IP地址列表的格式，如有必要，请添加子网掩码

Question

我有一个IP地址列表，如下所示：

208.69.112.145
54.230.228.48
104.21.75.86/31
104.16.139.76
172.67.210.123
104.21.54.226/31
45.146.81.248/31
205.251.219.56/30

需要转换成这样的格式：

route 208.69.112.145/32 reject;
route 54.230.228.48/32 reject;
route 104.21.75.86/31 reject;
route 104.16.139.76/32 reject;
route 172.67.210.123/32 reject;
route 104.21.54.226/31 reject;
route 45.146.81.248/31 reject;
route 205.251.219.56/30 reject;

因此每个地址都应该以route开头，以reject;结尾

除了没有子网掩码的线路外，应该为这些线路添加/32 reject;。

这是可行的，但它会将/32添加到每一行：

cat /ip.lst | sed 's_.*_route &/32 reject;_' > /ip.txt

Answer 1

您可以使用此sed

sed -E 's~^~route ~; s~\.[0-9]+$~&/32~; s~$~ reject;~' file

route 208.69.112.145/32 reject;
route 54.230.228.48/32 reject;
route 104.21.75.86/31 reject;
route 104.16.139.76/32 reject;
route 172.67.210.123/32 reject;
route 104.21.54.226/31 reject;
route 45.146.81.248/31 reject;
route 205.251.219.56/30 reject;

或者这个awk

awk -F/ '{print "route", $0 (NF==2 ? "" : "/32"), "reject;"}' file

route 208.69.112.145/32 reject;
route 54.230.228.48/32 reject;
route 104.21.75.86/31 reject;
route 104.16.139.76/32 reject;
route 172.67.210.123/32 reject;
route 104.21.54.226/31 reject;
route 45.146.81.248/31 reject;
route 205.251.219.56/30 reject;

Answer 2

仅当缺少32时才添加它。

sed '\_/[0-9][0-9]_!s_$_/32_; s_.*_route & reject;_'

希望你能明白这一点。