commit 7b0b2065faf449f820b092afb74cf0af2dae79a3
from: Nicola Girardi <nicolagi@sdf.org>
via: Dan Cross <crossd@gmail.com>
date: Mon Oct 18 20:41:11 2021 UTC

cmd/auxstats: improve network device name matcher in Linux

commit - 0ac2a105ae58e86a8d224020f0a3c43358312e66
commit + 7b0b2065faf449f820b092afb74cf0af2dae79a3
blob - e402655115f19fb92b93a97aef7e0e47a45ce6ec
blob + 74491ac294fe02a14503503ccf6df95bcdcfe2ed
--- src/cmd/auxstats/Linux.c
+++ src/cmd/auxstats/Linux.c
@@ -120,9 +120,11 @@ xnet(int first)
 	vlong totb, totp, tote, totin, totou, totinb, totoub, b, p, e, in, ou, inb, oub;
 	char *q;
 	static int fd = -1;
+	static Reprog *netdev = nil;
 
 	if(first){
 		fd = open("/proc/net/dev", OREAD);
+		netdev = regcomp("^(eth[0-9]+|wlan[0-9]+|enp[0-9]+s[0-9]+f[0-9]+|wlp[0-9]+s[0-9]+)$");
 		return;
 	}
 
@@ -141,7 +143,7 @@ xnet(int first)
 		tokens(i);
 		if(ntok < 8+8)
 			continue;
-		if(strncmp(tok[0], "eth", 3) != 0 && strncmp(tok[0], "wlan", 4) != 0)
+		if(regexec(netdev, tok[0], nil, 0) != 1)
 			continue;
 		inb = atoll(tok[1]);
 		oub = atoll(tok[9]);