ref: dfb4b522830edab8f3856289d326d6cf5e930644
dir: /sys/src/libip/myetheraddr.c/
#include <u.h> #include <libc.h> #include <ip.h> int myetheraddr(uchar *to, char *dev) { int n, fd; char buf[256]; if(*dev == '/' || *dev == '#') snprint(buf, sizeof buf, "%s/addr", dev); else snprint(buf, sizeof buf, "/net/%s/addr", dev); fd = open(buf, OREAD|OCEXEC); if(fd < 0) return -1; n = read(fd, buf, sizeof buf -1 ); close(fd); if(n <= 0) return -1; buf[n] = 0; parseether(to, buf); return 0; }