V7/usr/src/cmd/refer/glue2.c

Find at most related files.
including files from this version of Unix. 
 char refdir[50];
savedir()
{
if (refdir[0]==0)
	corout ("", refdir, "/bin/pwd", "", 50);
trimnl(refdir);
}
restodir()
{
chdir(refdir);
}