This is the output on my machine: 10.0.1.176 (enp0s25) 10.0.1.176 (enp0s25) 10.0.0.3 (wg0)
Notice the duplicate addresses for enp0s25. As I'm sure you know, as per the IP spec, a NIC can have multiple addresses, so long as they're on different subnets. Output of `ip -br address show enp0s25`: enp0s25 UP 10.0.1.176/24 metric 50 172.20.1.1/24 The underlying issue is that you call getifaddrs.3, which gives you a list of addresses(unique), and their corresponding NIC names(not necessarily unique), iterating over that & calling SIOCSIFADDR by ifname. One alternative is to just get the address from ifaddrs->ifa_addr. Jeremy On 03/26/23 01:08PM, Sean MacLennan wrote: > I started writing ipaddr almost 20 years ago after the umpteenth > time trying to parse ifconfig (and later ip) output in scripts. The > original version was get only and Linux only. > > It now supports Linux, QNX, and most BSDs. However, I rarely use BSD > these days... so the set functions may not work 100%. > > I thought there might be somebody in the suckless community that finds > it helpful. > > You need just the ip address of eth0? > % ipaddr eth0 > 192.168.1.173 > > Nice simple output. All error output goes to stderr, so you can get > just the IP or nothing. No awk/sed/cut needed. > > Also need the bitmask? > % ipaddr -b eth0 > 192.168.1.173/24 > > Maybe the netmask instead? > % ipaddr -im eth0 > 192.168.1.173 255.255.255.0 > > It can also be used to setup an interface: > % ipaddr eth0 192.168.0.33/24 192.168.0.1 > Will set the ip, netmask and default gateway. I could have also > specified the netmask the old way: 255.255.255.0. > > You can see ipaddr.c on github: > https://github.com/smaclennan/samtools/blob/master/ipaddr.c > > I can email the file to anybody who wants it. It is only 6k gzipped. > > Cheers, > Sean >
