1 files changed, 277 insertions, 0 deletions
diff --git a/ksim/systeminfo.cpp b/ksim/systeminfo.cpp
new file mode 100644
index 0000000..567477c
--- /dev/null
+++ b/ksim/systeminfo.cpp
@@ -0,0 +1,277 @@
+/*  System Information
+ *
+ *  Copyright (C) 2001  Robbie Ward <linuxphreak@gmx.co.uk>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "systeminfo.h"
+
+#ifdef __linux__
+#include <sys/sysinfo.h>
+#include <linux/kernel.h>
+#endif
+
+#ifdef HAVE_SYS_LOADAVG_H
+#include <sys/loadavg.h>
+#endif
+
+#ifdef __FreeBSD__
+#include <osreldate.h>
+#include <kvm.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <sys/conf.h>
+#if __FreeBSD_version < 400000
+#include <sys/rlist.h>
+#endif
+#include <sys/vmmeter.h>
+#include <sys/sysctl.h>
+#include <vm/vm_param.h>
+#include <iomanip>
+#include <iostream>
+#endif
+
+// Some global vars
+// expand as needed for other platforms
+int System::bytesToMegs( unsigned long value )
+{
+#ifdef __linux__
+  return ((((value / 1024) >> 10) | 11) + 1);
+#endif
+
+#ifdef __FreeBSD__
+  return (((value) + (1 << 19)) >> 20);
+#endif
+}
+
+System * System::m_self = 0; // initialize pointer
+System & System::self()
+{
+  if ( !m_self )
+  {
+    m_self = new System;
+    atexit( System::cleanup );
+  }
+
+  m_self->updateData();
+  return *m_self;
+}
+
+void System::cleanup()
+{
+  if ( !m_self )
+    return;
+
+  delete m_self;
+  m_self = 0;
+}
+
+double System::loadAverage( int load ) const
+{
+  int value = --load;
+  return loadAverages()[ value > 2 ? 2 : value ];
+}
+
+System::System()
+{
+  m_loads[ 0 ] = 0;
+  m_loads[ 1 ] = 0;
+  m_loads[ 2 ] = 0;
+
+  m_uptime = 0;
+  m_totalram = 0;
+  m_usedram = 0;
+  m_freeram = 0;
+  m_sharedram = 0;
+  m_bufferram = 0;
+  m_cacheram = 0;
+  m_totalhigh = 0;
+  m_freehigh = 0;
+  m_totalswap = 0;
+  m_usedswap = 0;
+  m_freeswap = 0;
+  m_procs = 0;
+
+  m_self = this;
+}
+
+System::~System()
+{
+}
+
+void System::updateData()
+{
+#ifdef __linux__
+  struct sysinfo system;
+  if (sysinfo(&system) < 0) {
+    fprintf(stderr, "Error calling sysinfo()\n");
+    return;
+  }
+
+  m_uptime = system.uptime;
+  m_totalram = system.totalram;
+  m_sharedram = system.sharedram;
+  m_bufferram = system.bufferram;
+  m_usedram = m_totalram - m_freeram;
+
+#ifdef HAVE_SYSINFO_HIGH
+  m_totalhigh = system.totalhigh;
+  m_freehigh = system.freehigh;
+#else
+#ifdef __GNUC__
+#warning "TODO: find alternative way to get total high and freehigh"
+#endif
+#endif
+
+  m_totalswap = system.totalswap;
+  m_freeswap = system.freeswap;
+  m_procs = system.procs;
+  m_cacheram = 0;
+
+  FILE *file = fopen("/proc/meminfo", "r");
+  char buffer[70];
+  if (file) {
+    while (fgets(buffer, sizeof(buffer), file)) {
+      sscanf(buffer, "Mem: %*d %*d %*d %*d %*d %lu", &m_cacheram);
+      if (m_cacheram != 0)
+        break;
+    }
+
+    fclose(file);
+  }
+
+  m_freeram = system.freeram;
+#endif
+
+#ifdef __FreeBSD__
+  struct timeval bootTime;
+  size_t size = sizeof(bootTime);
+
+  if (sysctlbyname("kern.boottime",
+        &bootTime, &size, NULL, 0) != -1 && bootTime.tv_sec != 0) {
+    m_uptime = time(0) - bootTime.tv_sec + 30;
+  }
+
+  char buf[80];
+  char *used;
+  char *total;
+  FILE *pipe;
+  static int psize = 0, pshift = 0;
+  static int name2oid[2] = { 0, 3 };
+  struct vmtotal vmt;
+  size_t vmtLength = sizeof(vmt);
+  static char name[] = "vfs.bufspace";
+  static int oidBufspace[CTL_MAXNAME + 2];
+  static size_t oidBufspaceLength = sizeof(oidBufspace);
+  size_t bufspaceLength = sizeof(int);
+  static int initialized = 0;
+  unsigned long memXUsed, memTotal;
+  size_t memLength = sizeof(memTotal);
+
+  if (pshift == 0) {
+    psize = getpagesize();
+    while (psize > 1) {
+      ++pshift;
+      psize >>= 1;
+    }
+  }
+
+  unsigned long xused1, xused2;
+  size_t xused1Length = sizeof(xused1);
+  size_t xused2Length = sizeof(xused2);
+  if (sysctlbyname("vm.stats.vm.v_active_count", &xused1, &xused1Length, NULL, 0) == 0
+     && sysctlbyname("vm.stats.vm.v_inactive_count", &xused2, &xused2Length, NULL, 0) == 0) {
+    memXUsed = (xused1 + xused2) << pshift;
+  }
+
+  unsigned long cacheRam;
+  size_t cacheSize = sizeof(cacheRam);
+  if (sysctlbyname("vm.stats.vm.v_active_count", &cacheRam, &cacheSize, NULL, 0) == 0) {
+    m_cacheram = cacheRam << pshift;
+  }
+
+  if (!m_totalram && sysctlbyname("hw.physmem", &memTotal, &memLength, NULL, 0) == 0)
+    m_totalram = memTotal;
+
+  if (sysctlbyname("vm.meter", &vmt, &vmtLength, NULL, 0) == 0)
+    m_sharedram = vmt.t_rmshr << pshift;
+
+  if (!initialized) {
+    if (sysctl(name2oid, 2, oidBufspace, &oidBufspaceLength,
+          name, strlen(name)) < 0)
+      return;
+
+    oidBufspaceLength /= sizeof(int);
+    ++initialized;
+  }
+
+  if (sysctl(oidBufspace, oidBufspaceLength,
+         &m_bufferram, &bufspaceLength, 0, 0) < 0)
+    return;
+
+  m_usedram = memXUsed - m_bufferram - m_cacheram;
+  m_freeram = memTotal - m_usedram;
+
+  //TODO: get the total and free high mem values
+  m_totalhigh = 0;
+  m_freehigh = 0;
+
+  if ((pipe = popen("/usr/sbin/swapinfo -k", "r")) == 0) {
+    fprintf(stderr, "Error reading swap info\n");
+    m_freeswap = m_totalswap = 1;
+    return;
+  }
+
+  fgets(buf, sizeof(buf), pipe);
+  fgets(buf, sizeof(buf), pipe);
+  fgets(buf, sizeof(buf), pipe);
+  fgets(buf, sizeof(buf), pipe);
+  pclose(pipe);
+
+  strtok(buf, " ");
+  total = strtok(NULL, " ");
+  used = strtok(NULL, " ");
+  unsigned long usedSwap = atol(used) * 1024;
+
+  m_totalswap = atol(total) * 1024;
+  m_freeswap = m_totalswap - usedSwap;
+
+  //TODO: get amount of procs
+  m_procs = 0;
+#endif
+
+#ifdef HAVE_GETLOADAVG
+  double load[3];
+  if (getloadavg(load, 3) != -1) {
+    m_loads[0] = load[0];
+    m_loads[1] = load[1];
+    m_loads[2] = load[2];
+  }
+#else
+#warning "TODO: Find an alternative method for getloadavg"
+#endif
+
+  m_usedswap = m_totalswap - m_freeswap;
+}