First passes at exposing prusage.

.gitignore

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+*.swp
+.DS_Store
+.idea
+nohup.out
+npm-debug.log
+node_modules
+*.pem
+*.srl

package.json

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+{
+  "name": "proc",
+  "version": "0.0.1",
+  "description": "Solaris process info",
+  "author": "Daniel D. Shaw <dshaw@dshaw.com> (http://dshaw.com)",
+  "main": "./build/Release/prusage",
+  "scripts": {
+  	"install": "node-waf configure clean build"
+  }
+}

prusage.cc

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+#include "node.h"
+
+#include <unistd.h> /* getpagesize() */
+#include <stdlib.h> /* getexecname() */
+#include <strings.h> /* strncpy() */
+
+#include <kstat.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/loadavg.h>
+#include <sys/socket.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+
+#if (!defined(_LP64)) && (_FILE_OFFSET_BITS - 0 == 64)
+#define PROCFS_FILE_OFFSET_BITS_HACK 1
+#undef _FILE_OFFSET_BITS
+#else
+#define PROCFS_FILE_OFFSET_BITS_HACK 0
+#endif
+
+#include <sys/procfs.h>
+
+#if (PROCFS_FILE_OFFSET_BITS_HACK - 0 == 1)
+#define _FILE_OFFSET_BITS 64
+#endif
+
+
+using namespace std;
+using namespace node;
+using namespace v8;
+
+
+static Handle<Value> GetMsnd(const Arguments &args);
+static Handle<Value> GetIoch(const Arguments &args);
+extern "C" void init (Handle<Object>);
+
+
+static Handle<Value> GetMsnd(const Arguments &args) {
+  HandleScope scope;
+  prusage_t prusage;
+  ulong_t msnd;
+  int fd;
+
+  if ((fd = open("/proc/self/usage", O_RDONLY)) < 0)
+    return scope.Close(Integer::New(-1));
+
+  if (read(fd, &prusage, sizeof (prusage_t)) != sizeof (prusage_t)) {
+    (void) close(fd);
+    return scope.Close(Integer::New(-1));
+  }
+
+  msnd = (ulong_t) prusage.pr_msnd;
+  (void) close(fd);
+
+  return scope.Close(Integer::New(msnd));
+}
+
+static Handle<Value> GetIoch(const Arguments &args) {
+  HandleScope scope;
+  prusage_t prusage;
+  ulong_t ioch;
+  int fd;
+
+  if ((fd = open("/proc/self/usage", O_RDONLY)) < 0)
+    return scope.Close(Integer::New(-1));
+
+  if (read(fd, &prusage, sizeof (prusage_t)) != sizeof (prusage_t)) {
+    (void) close(fd);
+    return scope.Close(Integer::New(-1));
+  }
+
+  ioch = (ulong_t) prusage.pr_ioch;
+  (void) close(fd);
+
+  return scope.Close(Integer::New(ioch));
+}
+
+extern "C" void init (Handle<Object> target) {
+  HandleScope scope;
+  NODE_SET_METHOD(target, "msnd", GetMsnd);
+  NODE_SET_METHOD(target, "ioch", GetIoch);
+}

test/usage.test.js

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+var net = require('net')
+  , usage = require('..');
+
+var msnd = usage.msnd()
+  , ioch = usage.ioch();
+
+console.dir(usage);
+
+var client;
+
+for (var i=0; i < 3; i++) {
+  client = net.connect(80, 'google.com', function() { //'connect' listener
+    console.log('client connected');
+    client.write('world!\r\n');
+  });
+  client.on('data', function(data) {
+    //console.log(data.toString(), 'msnd', msnd, 'ioch', ioch);
+    console.log('msnd', msnd, 'ioch', ioch);
+    client.end();
+  });
+  client.on('end', function() {
+    console.log('client disconnected');
+    console.log('msnd', msnd, 'ioch', ioch);
+  });
+}

wscript

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+srcdir = "."
+blddir = "build"
+VERSION = "0.0.1"
+
+def set_options(opt):
+  opt.tool_options("compiler_cxx")
+
+def configure(conf):
+  conf.check_tool("compiler_cxx")
+  conf.check_tool("node_addon")
+
+def build(bld):
+  obj = bld.new_task_gen("cxx", "shlib", "node_addon")
+  # without this, eio_custom doesn't keep a ref to the req->data
+  obj.cxxflags = ["-D_FILE_OFFSET_BITS=64", "-D_LARGEFILE_SOURCE"]
+  obj.target = "prusage"
+  obj.source = "prusage.cc"