ref: 347bb2a7a7110e55debd5ebe57ba03bbe315c5ba
dir: /sys/src/cmd/ip/dhcpd/dhcpleases.c/
#include <u.h> #include <libc.h> #include <bio.h> #include <ndb.h> #include <ip.h> #include <dat.h> extern char *binddir; long now; char *blog = "ipboot"; int minlease = MinLease; void main(void) { Dir *all; int i, nall, fd; Binding b; fmtinstall('E', eipfmt); fmtinstall('I', eipfmt); fmtinstall('V', eipfmt); fmtinstall('M', eipfmt); fd = open(binddir, OREAD); if(fd < 0) sysfatal("opening %s: %r", binddir); nall = dirreadall(fd, &all); if(nall < 0) sysfatal("reading %s: %r", binddir); close(fd); b.boundto = 0; b.lease = b.offer = 0; now = time(0); for(i = 0; i < nall; i++){ if(parseip(b.ip, all[i].name) == -1 || syncbinding(&b, 0) < 0) continue; if(b.lease > now) print("%I leased by %s until %s", b.ip, b.boundto, ctime(b.lease)); } exits(0); }