fdalloc            62 kernel/sysfile.c   if ((fd = fdalloc(f)) < 0)
fdalloc           368 kernel/sysfile.c   if ((f = filealloc()) == 0 || (fd = fdalloc(f)) < 0) {
fdalloc           513 kernel/sysfile.c   if ((fd0 = fdalloc(rf)) < 0 || (fd1 = fdalloc(wf)) < 0) {