stats helper
diff --git a/src/cmd/auxstats/Darwin.c b/src/cmd/auxstats/Darwin.c
new file mode 100644
index 0000000..da6c2a2
--- /dev/null
+++ b/src/cmd/auxstats/Darwin.c
@@ -0,0 +1,250 @@
+/*
+ * No idea whether this will work. It does compile.
+ */
+
+#include <u.h>
+#include <kvm.h>
+#include <nlist.h>
+#include <sys/types.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <sys/time.h>
+#include <sys/dkstat.h>
+#include <net/if.h>
+#include <net/if_var.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+#include <sys/ioctl.h>
+#include <limits.h>
+#include <libc.h>
+#include <bio.h>
+#include "dat.h"
+
+void xloadavg(int);
+void xcpu(int);
+void xswap(int);
+void xsysctl(int);
+void xnet(int);
+void xkvm(int);
+
+void (*statfn[])(int) =
+{
+ xkvm,
+ xloadavg,
+ xswap,
+ xcpu,
+ xsysctl,
+ xnet,
+ 0
+};
+
+static kvm_t *kvm;
+
+static struct nlist nl[] = {
+ { "_ifnet" },
+ { "_cp_time" },
+ { "" },
+};
+
+void
+kvminit(void)
+{
+ char buf[_POSIX2_LINE_MAX];
+
+ if(kvm)
+ return;
+ kvm = kvm_openfiles(nil, nil, nil, OREAD, buf);
+ if(kvm == nil)
+ return;
+ if(kvm_nlist(kvm, nl) < 0 || nl[0].n_type == 0){
+ kvm = nil;
+ return;
+ }
+}
+
+void
+xkvm(int first)
+{
+ if(first)
+ kvminit();
+}
+
+int
+kread(ulong addr, char *buf, int size)
+{
+ if(kvm_read(kvm, addr, buf, size) != size){
+ memset(buf, 0, size);
+ return -1;
+ }
+ return size;
+}
+
+void
+xnet(int first)
+{
+ ulong out, in, outb, inb, err;
+ static ulong ifnetaddr;
+ ulong addr;
+ struct ifnet ifnet;
+ struct ifnethead ifnethead;
+ char name[16];
+
+ if(first)
+ return;
+
+ if(ifnetaddr == 0){
+ ifnetaddr = nl[0].n_value;
+ if(ifnetaddr == 0)
+ return;
+ }
+
+ if(kread(ifnetaddr, (char*)&ifnethead, sizeof ifnethead) < 0)
+ return;
+
+ out = in = outb = inb = err = 0;
+ addr = (ulong)TAILQ_FIRST(&ifnethead);
+ while(addr){
+ if(kread(addr, (char*)&ifnet, sizeof ifnet) < 0
+ || kread((ulong)ifnet.if_name, name, 16) < 0)
+ return;
+ name[15] = 0;
+ addr = (ulong)TAILQ_NEXT(&ifnet, if_link);
+ out += ifnet.if_opackets;
+ in += ifnet.if_ipackets;
+ outb += ifnet.if_obytes;
+ inb += ifnet.if_ibytes;
+ err += ifnet.if_oerrors+ifnet.if_ierrors;
+ }
+ Bprint(&bout, "etherin %lud\n", in);
+ Bprint(&bout, "etherout %lud\n", out);
+ Bprint(&bout, "etherinb %lud\n", inb);
+ Bprint(&bout, "etheroutb %lud\n", outb);
+ Bprint(&bout, "ethererr %lud\n", err);
+ Bprint(&bout, "ether %lud\n", in+out);
+ Bprint(&bout, "etherb %lud\n", inb+outb);
+}
+
+
+int
+rsys(char *name, char *buf, int len)
+{
+ size_t l;
+
+ l = len;
+ if(sysctlbyname(name, buf, &l, nil, 0) < 0)
+ return -1;
+ buf[l] = 0;
+ return l;
+}
+
+vlong
+isys(char *name)
+{
+ ulong u;
+ size_t l;
+
+ l = sizeof u;
+ if(sysctlbyname(name, &u, &l, nil, 0) < 0)
+ return 0;
+ return u;
+}
+
+void
+xsysctl(int first)
+{
+ static int pgsize;
+ vlong t;
+
+ if(first){
+ pgsize = isys("vm.stats.vm.v_page_size");
+ if(pgsize == 0)
+ pgsize = 4096;
+ }
+ if((t = isys("vm.stats.vm.v_page_count")) != 0)
+ Bprint(&bout, "mem %lld %lld\n",
+ isys("vm.stats.vm.v_active_count")*pgsize,
+ t*pgsize);
+ Bprint(&bout, "context %lld 1000\n", isys("vm.stats.sys.v_swtch"));
+ Bprint(&bout, "syscall %lld 1000\n", isys("vm.stats.sys.v_syscall"));
+ Bprint(&bout, "intr %lld 1000\n", isys("vm.stats.sys.v_intr")+isys("vm.stats.sys.v_trap"));
+ Bprint(&bout, "fault %lld 1000\n", isys("vm.stats.vm.v_vm_faults"));
+ Bprint(&bout, "fork %lld 1000\n", isys("vm.stats.vm.v_forks")
+ +isys("vm.stats.vm.v_rforks")
+ +isys("vm.stats.vm.v_vforks"));
+}
+
+void
+xcpu(int first)
+{
+#if 0
+ static int stathz;
+ ulong x[20];
+ struct clockinfo *ci;
+ int n;
+
+ if(first){
+ if(rsys("kern.clockrate", (char*)&x, sizeof x) < sizeof ci)
+ stathz = 128;
+ else{
+ ci = (struct clockinfo*)x;
+ stathz = ci->stathz;
+ }
+ return;
+ }
+
+ if((n=rsys("kern.cp_time", (char*)x, sizeof x)) < 5*sizeof(ulong))
+ return;
+
+ Bprint(&bout, "user %lud %d\n", x[CP_USER]+x[CP_NICE], stathz);
+ Bprint(&bout, "sys %lud %d\n", x[CP_SYS], stathz);
+ Bprint(&bout, "cpu %lud %d\n", x[CP_USER]+x[CP_NICE]+x[CP_SYS], stathz);
+ Bprint(&bout, "idle %lud %d\n", x[CP_IDLE], stathz);
+#endif
+}
+
+void
+xloadavg(int first)
+{
+ double l[3];
+
+ if(first)
+ return;
+
+ if(getloadavg(l, 3) < 0)
+ return;
+ Bprint(&bout, "load %d 1000\n", (int)(l[0]*1000.0));
+}
+
+void
+xswap(int first)
+{
+#if 0
+ static struct kvm_swap s;
+ static ulong pgin, pgout;
+ int i, o;
+ static int pgsize;
+
+ if(first){
+ pgsize = getpagesize();
+ if(pgsize == 0)
+ pgsize = 4096;
+ return;
+ }
+
+ if(kvm == nil)
+ return;
+
+ i = isys("vm.stats.vm.v_swappgsin");
+ o = isys("vm.stats.vm.v_swappgsout");
+ if(i != pgin || o != pgout){
+ pgin = i;
+ pgout = o;
+ kvm_getswapinfo(kvm, &s, 1, 0);
+ }
+
+
+ Bprint(&bout, "swap %lld %lld\n", s.ksw_used*(vlong)pgsize, s.ksw_total*(vlong)pgsize);
+#endif
+}
+
