diff --git a/Action.c b/Action.c
new file mode 100644
index 00000000..23f0c840
--- /dev/null
+++ b/Action.c
@@ -0,0 +1,59 @@
+/*
+htop - Action.c
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Process.h"
+#include "Panel.h"
+#include "Action.h"
+
+/*{
+
+#include "IncSet.h"
+#include "Settings.h"
+#include "UsersTable.h"
+
+typedef enum {
+   HTOP_OK = 0x00,
+   HTOP_REFRESH = 0x01,
+   HTOP_RECALCULATE = 0x03, // implies HTOP_REFRESH
+   HTOP_SAVE_SETTINGS = 0x04,
+   HTOP_KEEP_FOLLOWING = 0x08,
+   HTOP_QUIT = 0x10,
+   HTOP_REDRAW_BAR = 0x20,
+   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
+} Htop_Reaction;
+
+typedef Htop_Reaction (*Htop_Action)();
+
+typedef struct State_ {
+   IncSet* inc;
+   Settings* settings;
+   UsersTable* ut;
+} State;
+
+typedef bool(*Action_ForeachProcessFn)(Process*, size_t);
+
+}*/
+
+bool Action_foreachProcess(Panel* panel, Action_ForeachProcessFn fn, int arg, bool* wasAnyTagged) {
+   bool ok = true;
+   bool anyTagged = false;
+   for (int i = 0; i < Panel_size(panel); i++) {
+      Process* p = (Process*) Panel_get(panel, i);
+      if (p->tag) {
+         ok = fn(p, arg) && ok;
+         anyTagged = true;
+      }
+   }
+   if (!anyTagged) {
+      Process* p = (Process*) Panel_getSelected(panel);
+      if (p) ok = fn(p, arg) && ok;
+   }
+   if (wasAnyTagged)
+      *wasAnyTagged = anyTagged;
+   return ok;
+}
+
diff --git a/Action.h b/Action.h
new file mode 100644
index 00000000..5a2ce1ce
--- /dev/null
+++ b/Action.h
@@ -0,0 +1,42 @@
+/* Do not edit this file. It was automatically generated. */
+
+#ifndef HEADER_Action
+#define HEADER_Action
+/*
+htop - Action.h
+(C) 2014 Hisham H. Muhammad
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+
+#include "IncSet.h"
+#include "Settings.h"
+#include "UsersTable.h"
+
+typedef enum {
+   HTOP_OK = 0x00,
+   HTOP_REFRESH = 0x01,
+   HTOP_RECALCULATE = 0x03, // implies HTOP_REFRESH
+   HTOP_SAVE_SETTINGS = 0x04,
+   HTOP_KEEP_FOLLOWING = 0x08,
+   HTOP_QUIT = 0x10,
+   HTOP_REDRAW_BAR = 0x20,
+   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
+} Htop_Reaction;
+
+typedef Htop_Reaction (*Htop_Action)();
+
+typedef struct State_ {
+   IncSet* inc;
+   Settings* settings;
+   UsersTable* ut;
+} State;
+
+typedef bool(*Action_ForeachProcessFn)(Process*, size_t);
+
+
+bool Action_foreachProcess(Panel* panel, Action_ForeachProcessFn fn, int arg, bool* wasAnyTagged);
+
+
+#endif
diff --git a/CRT.c b/CRT.c
index 14a30d0f..c06c3caf 100644
--- a/CRT.c
+++ b/CRT.c
@@ -7,7 +7,6 @@ in the source distribution for its full text.
 
 #include "CRT.h"
 
-#include "config.h"
 #include "String.h"
 #include "RichString.h"
 
@@ -16,9 +15,6 @@ in the source distribution for its full text.
 #include <signal.h>
 #include <stdlib.h>
 #include <string.h>
-#ifdef HAVE_EXECINFO_H
-#include <execinfo.h>
-#endif
 
 #define ColorPair(i,j) COLOR_PAIR((7-i)*8+j)
 
@@ -112,6 +108,8 @@ typedef enum ColorElements_ {
 
 void CRT_fatalError(const char* note) __attribute__ ((noreturn));
 
+void CRT_handleSIGSEGV(int sgn);
+
 }*/
 
 // TODO: centralize these in Settings.
@@ -134,27 +132,6 @@ char* CRT_termType;
 
 void *backtraceArray[128];
 
-static void CRT_handleSIGSEGV(int sgn) {
-   (void) sgn;
-   CRT_done();
-   #if __linux
-   fprintf(stderr, "\n\nhtop " VERSION " aborting. Please report bug at http://hisham.hm/htop\n");
-   #ifdef HAVE_EXECINFO_H
-   size_t size = backtrace(backtraceArray, sizeof(backtraceArray) / sizeof(void *));
-   fprintf(stderr, "\n Please include in your report the following backtrace: \n");
-   backtrace_symbols_fd(backtraceArray, size, 2);
-   fprintf(stderr, "\nAdditionally, in order to make the above backtrace useful,");
-   fprintf(stderr, "\nplease also run the following command to generate a disassembly of your binary:");
-   fprintf(stderr, "\n\n   objdump -d `which htop` > ~/htop.objdump");
-   fprintf(stderr, "\n\nand then attach the file ~/htop.objdump to your bug report.");
-   fprintf(stderr, "\n\nThank you for helping to improve htop!\n\n");
-   #endif
-   #else
-   fprintf(stderr, "\n\nhtop " VERSION " aborting. Unsupported platform.\n");
-   #endif
-   abort();
-}
-
 static void CRT_handleSIGTERM(int sgn) {
    (void) sgn;
    CRT_done();
diff --git a/CRT.h b/CRT.h
index 260d0874..b77a83a7 100644
--- a/CRT.h
+++ b/CRT.h
@@ -9,9 +9,6 @@ Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */
 
-#ifdef HAVE_EXECINFO_H
-#endif
-
 #define ColorPair(i,j) COLOR_PAIR((7-i)*8+j)
 
 #define COLORSCHEME_DEFAULT 0
@@ -103,6 +100,8 @@ typedef enum ColorElements_ {
 
 void CRT_fatalError(const char* note) __attribute__ ((noreturn));
 
+void CRT_handleSIGSEGV(int sgn);
+
 
 // TODO: centralize these in Settings.
 
diff --git a/Makefile.am b/Makefile.am
index 820e2e54..9eb31a79 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,7 +1,9 @@
 
 ACLOCAL_AMFLAGS = -I m4
+AUTOMAKE_OPTIONS = subdir-objects
 
 bin_PROGRAMS = htop
+
 dist_man_MANS = htop.1
 EXTRA_DIST = $(dist_man_MANS) htop.desktop htop.png scripts/MakeHeader.py \
 install-sh autogen.sh missing
@@ -10,7 +12,7 @@ applications_DATA = htop.desktop
 pixmapdir = $(datadir)/pixmaps
 pixmap_DATA = htop.png
 
-htop_CFLAGS = -pedantic -Wall -Wextra -std=c99 -rdynamic -D_XOPEN_SOURCE_EXTENDED -DSYSCONFDIR=\"$(sysconfdir)\"
+htop_CFLAGS = -pedantic -Wall -Wextra -std=c99 -rdynamic -D_XOPEN_SOURCE_EXTENDED -DSYSCONFDIR=\"$(sysconfdir)\" -I"$(my_htop_platform)"
 AM_CPPFLAGS = -DNDEBUG
 
 myhtopsources = AvailableMetersPanel.c CategoriesPanel.c CheckItem.c \
@@ -18,23 +20,42 @@ ClockMeter.c ColorsPanel.c ColumnsPanel.c CPUMeter.c CRT.c \
 DisplayOptionsPanel.c FunctionBar.c Hashtable.c Header.c htop.c ListItem.c \
 LoadAverageMeter.c MemoryMeter.c Meter.c MetersPanel.c Object.c Panel.c \
 BatteryMeter.c Process.c ProcessList.c RichString.c ScreenManager.c Settings.c \
-IOPriorityPanel.c SignalsPanel.c String.c SwapMeter.c TasksMeter.c TraceScreen.c \
+SignalsPanel.c String.c SwapMeter.c TasksMeter.c TraceScreen.c \
 UptimeMeter.c UsersTable.c Vector.c AvailableColumnsPanel.c AffinityPanel.c \
-HostnameMeter.c OpenFilesScreen.c Affinity.c IOPriority.c IncSet.c
+HostnameMeter.c OpenFilesScreen.c Affinity.c IncSet.c Action.c
 
 myhtopheaders = AvailableColumnsPanel.h AvailableMetersPanel.h \
 CategoriesPanel.h CheckItem.h ClockMeter.h ColorsPanel.h ColumnsPanel.h \
-IOPriorityPanel.h CPUMeter.h CRT.h DisplayOptionsPanel.h FunctionBar.h \
+CPUMeter.h CRT.h DisplayOptionsPanel.h FunctionBar.h \
 Hashtable.h Header.h htop.h ListItem.h LoadAverageMeter.h MemoryMeter.h \
 BatteryMeter.h Meter.h MetersPanel.h Object.h Panel.h ProcessList.h RichString.h \
 ScreenManager.h Settings.h SignalsPanel.h String.h SwapMeter.h TasksMeter.h \
 TraceScreen.h UptimeMeter.h UsersTable.h Vector.h Process.h AffinityPanel.h \
-HostnameMeter.h OpenFilesScreen.h Affinity.h IOPriority.h IncSet.h
+HostnameMeter.h OpenFilesScreen.h Affinity.h IncSet.h Action.h
+
+if HTOP_LINUX
+myhtopplatsources = linux/Platform.c linux/IOPriorityPanel.c linux/IOPriority.c \
+linux/LinuxProcessList.c linux/LinuxCRT.c
+
+myhtopplatheaders = linux/Platform.h linux/IOPriorityPanel.h linux/IOPriority.h \
+linux/LinuxProcessList.h linux/LinuxCRT.h
+endif
+
+if HTOP_UNSUPPORTED
+myhtopplatsources = unsupported/Platform.c unsupported/UnsupportedProcessList.c \
+unsupported/UnsupportedCRT.c
+
+myhtopplatheaders = unsupported/Platform.h unsupported/UnsupportedProcessList.h \
+unsupported/UnsupportedCRT.h
+endif
 
 SUFFIXES = .h
 
-BUILT_SOURCES = $(myhtopheaders)
-htop_SOURCES = $(myhtopheaders) $(myhtopsources) config.h
+BUILT_SOURCES = $(myhtopheaders) $(myhtopplatheaders)
+htop_SOURCES  = $(myhtopheaders) $(myhtopplatheaders) $(myhtopsources) $(myhtopplatsources) config.h
+
+target:
+	echo $(htop_SOURCES)
 
 profile:
 	$(MAKE) all CFLAGS="-pg" AM_CPPFLAGS="-pg -O2 -DNDEBUG"
@@ -47,3 +68,4 @@ debug:
 
 cppcheck:
 	cppcheck -q -v . --enable=all -DHAVE_CGROUP -DHAVE_OPENVZ -DHAVE_TASKSTATS
+
diff --git a/Process.c b/Process.c
index 5501b3e9..dd08521b 100644
--- a/Process.c
+++ b/Process.c
@@ -1,6 +1,6 @@
 /*
 htop - Process.c
-(C) 2004-2011 Hisham H. Muhammad
+(C) 2004-2014 Hisham H. Muhammad
 Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */
@@ -32,7 +32,7 @@ in the source distribution for its full text.
 #include <hwloc/linux.h>
 #endif
 
-// This works only with glibc 2.1+. On earlier versions
+// On Linux, this works only with glibc 2.1+. On earlier versions
 // the behavior is similar to have a hardcoded page size.
 #ifndef PAGE_SIZE
 #define PAGE_SIZE ( sysconf(_SC_PAGESIZE) )
@@ -42,7 +42,7 @@ in the source distribution for its full text.
 /*{
 #include "Object.h"
 #include "Affinity.h"
-#include "IOPriority.h"
+
 #include <sys/types.h>
 
 #define PROCESS_FLAG_IO 1
@@ -122,7 +122,6 @@ typedef struct Process_ {
    long int priority;
    long int nice;
    long int nlwp;
-   IOPriority ioPriority;
    char starttime_show[8];
    time_t starttime_ctime;
 
@@ -628,24 +627,6 @@ static void Process_writeField(Process* this, RichString* str, ProcessField fiel
    #ifdef HAVE_OOM
    case OOM: snprintf(buffer, n, Process_pidFormat, this->oom); break;
    #endif
-   case IO_PRIORITY: {
-      int klass = IOPriority_class(this->ioPriority);
-      if (klass == IOPRIO_CLASS_NONE) {
-         // see note [1] above
-         snprintf(buffer, n, "B%1d ", (int) (this->nice + 20) / 5);
-      } else if (klass == IOPRIO_CLASS_BE) {
-         snprintf(buffer, n, "B%1d ", IOPriority_data(this->ioPriority));
-      } else if (klass == IOPRIO_CLASS_RT) {
-         attr = CRT_colors[PROCESS_HIGH_PRIORITY];
-         snprintf(buffer, n, "R%1d ", IOPriority_data(this->ioPriority));
-      } else if (this->ioPriority == IOPriority_Idle) {
-         attr = CRT_colors[PROCESS_LOW_PRIORITY]; 
-         snprintf(buffer, n, "id ");
-      } else {
-         snprintf(buffer, n, "?? ");
-      }
-      break;
-   }
    default:
       snprintf(buffer, n, "- ");
    }
@@ -720,27 +701,6 @@ bool Process_changePriorityBy(Process* this, size_t delta) {
    return Process_setPriority(this, this->nice + delta);
 }
 
-IOPriority Process_updateIOPriority(Process* this) {
-   IOPriority ioprio = syscall(SYS_ioprio_get, IOPRIO_WHO_PROCESS, this->pid);
-   this->ioPriority = ioprio;
-   return ioprio;
-}
-
-bool Process_setIOPriority(Process* this, IOPriority ioprio) {
-   syscall(SYS_ioprio_set, IOPRIO_WHO_PROCESS, this->pid, ioprio);
-   return (Process_updateIOPriority(this) == ioprio);
-}
-
-/*
-[1] Note that before kernel 2.6.26 a process that has not asked for
-an io priority formally uses "none" as scheduling class, but the
-io scheduler will treat such processes as if it were in the best
-effort class. The priority within the best effort class will  be
-dynamically  derived  from  the  cpu  nice level of the process:
-io_priority = (cpu_nice + 20) / 5. -- From ionice(1) man page
-*/
-#define Process_effectiveIOPriority(p_) (IOPriority_class(p_->ioPriority) == IOPRIO_CLASS_NONE ? IOPriority_tuple(IOPRIO_CLASS_BE, (p_->nice + 20) / 5) : p_->ioPriority)
-
 #ifdef HAVE_LIBHWLOC
 
 Affinity* Process_getAffinity(Process* this) {
@@ -902,8 +862,6 @@ long Process_compare(const void* v1, const void* v2) {
    case OOM:
       return (p1->oom - p2->oom);
    #endif
-   case IO_PRIORITY:
-      return Process_effectiveIOPriority(p1) - Process_effectiveIOPriority(p2);
    default:
       return (p1->pid - p2->pid);
    }
diff --git a/Process.h b/Process.h
index 87196eee..c4ef808d 100644
--- a/Process.h
+++ b/Process.h
@@ -4,7 +4,7 @@
 #define HEADER_Process
 /*
 htop - Process.h
-(C) 2004-2011 Hisham H. Muhammad
+(C) 2004-2014 Hisham H. Muhammad
 Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */
@@ -12,7 +12,7 @@ in the source distribution for its full text.
 #ifdef HAVE_LIBHWLOC
 #endif
 
-// This works only with glibc 2.1+. On earlier versions
+// On Linux, this works only with glibc 2.1+. On earlier versions
 // the behavior is similar to have a hardcoded page size.
 #ifndef PAGE_SIZE
 #define PAGE_SIZE ( sysconf(_SC_PAGESIZE) )
@@ -21,7 +21,7 @@ in the source distribution for its full text.
 
 #include "Object.h"
 #include "Affinity.h"
-#include "IOPriority.h"
+
 #include <sys/types.h>
 
 #define PROCESS_FLAG_IO 1
@@ -101,7 +101,6 @@ typedef struct Process_ {
    long int priority;
    long int nice;
    long int nlwp;
-   IOPriority ioPriority;
    char starttime_show[8];
    time_t starttime_ctime;
 
@@ -202,20 +201,6 @@ bool Process_setPriority(Process* this, int priority);
 
 bool Process_changePriorityBy(Process* this, size_t delta);
 
-IOPriority Process_updateIOPriority(Process* this);
-
-bool Process_setIOPriority(Process* this, IOPriority ioprio);
-
-/*
-[1] Note that before kernel 2.6.26 a process that has not asked for
-an io priority formally uses "none" as scheduling class, but the
-io scheduler will treat such processes as if it were in the best
-effort class. The priority within the best effort class will  be
-dynamically  derived  from  the  cpu  nice level of the process:
-extern io_priority;
-*/
-#define Process_effectiveIOPriority(p_) (IOPriority_class(p_->ioPriority) == IOPRIO_CLASS_NONE ? IOPriority_tuple(IOPRIO_CLASS_BE, (p_->nice + 20) / 5) : p_->ioPriority)
-
 #ifdef HAVE_LIBHWLOC
 
 Affinity* Process_getAffinity(Process* this);
diff --git a/ProcessList.c b/ProcessList.c
index 7841e0a3..16a52a59 100644
--- a/ProcessList.c
+++ b/ProcessList.c
@@ -35,18 +35,6 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Process.h"
 
-#ifndef PROCDIR
-#define PROCDIR "/proc"
-#endif
-
-#ifndef PROCSTATFILE
-#define PROCSTATFILE PROCDIR "/stat"
-#endif
-
-#ifndef PROCMEMINFOFILE
-#define PROCMEMINFOFILE PROCDIR "/meminfo"
-#endif
-
 #ifndef MAX_NAME
 #define MAX_NAME 128
 #endif
@@ -155,6 +143,9 @@ typedef struct ProcessList_ {
 
 } ProcessList;
 
+ProcessList* ProcessList_new(UsersTable* ut, Hashtable* pidWhiteList);
+void ProcessList_scan(ProcessList* pl);
+
 }*/
 
 static ProcessField defaultHeaders[] = { PID, USER, PRIORITY, NICE, M_SIZE, M_RESIDENT, M_SHARE, STATE, PERCENT_CPU, PERCENT_MEM, TIME, COMM, 0 };
@@ -179,45 +170,18 @@ const char *ProcessList_treeStrUtf8[TREE_STR_COUNT] = {
    "\xe2\x94\x80", // TREE_STR_SHUT ─
 };
 
-static ssize_t xread(int fd, void *buf, size_t count) {
-  // Read some bytes. Retry on EINTR and when we don't get as many bytes as we requested.
-  size_t alreadyRead = 0;
-  for(;;) {
-     ssize_t res = read(fd, buf, count);
-     if (res == -1 && errno == EINTR) continue;
-     if (res > 0) {
-       buf = ((char*)buf)+res;
-       count -= res;
-       alreadyRead += res;
-     }
-     if (res == -1) return -1;
-     if (count == 0 || res == 0) return alreadyRead;
-  }
-}
-
-ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList) {
-   ProcessList* this;
-   this = calloc(1, sizeof(ProcessList));
+ProcessList* ProcessList_init(ProcessList* this, UsersTable* usersTable, Hashtable* pidWhiteList) {
    this->processes = Vector_new(Class(Process), true, DEFAULT_SIZE);
    this->processTable = Hashtable_new(140, false);
    this->usersTable = usersTable;
    this->pidWhiteList = pidWhiteList;
    
-   /* tree-view auxiliary buffers */
+   // tree-view auxiliary buffers
    this->processes2 = Vector_new(Class(Process), true, DEFAULT_SIZE);
    
-   FILE* file = fopen(PROCSTATFILE, "r");
-   if (file == NULL) {
-      CRT_fatalError("Cannot open " PROCSTATFILE);
-   }
-   char buffer[256];
-   int cpus = -1;
-   do {
-      cpus++;
-      fgets(buffer, 255, file);
-   } while (String_startsWith(buffer, "cpu"));
-   fclose(file);
-   this->cpuCount = MAX(cpus - 1, 1);
+   // set later by platform-specific code
+   this->cpuCount = 0;
+   this->cpus = NULL;
 
 #ifdef HAVE_LIBHWLOC
    this->topologyOk = false;
@@ -229,12 +193,6 @@ ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList) {
       this->topologyOk = true;
    }
 #endif
-   this->cpus = calloc(cpus, sizeof(CPUData));
-
-   for (int i = 0; i < cpus; i++) {
-      this->cpus[i].totalTime = 1;
-      this->cpus[i].totalPeriod = 1;
-   }
 
    this->fields = calloc(LAST_PROCESSFIELD+1, sizeof(ProcessField));
    // TODO: turn 'fields' into a Vector,
@@ -245,10 +203,6 @@ ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList) {
       this->flags |= Process_fieldFlags[defaultHeaders[i]];
    }
 
-   #ifdef HAVE_OPENVZ
-   this->flags |= PROCESS_FLAG_OPENVZ;
-   #endif
-
    this->sortKey = PERCENT_CPU;
    this->direction = 1;
    this->hideThreads = false;
@@ -304,7 +258,7 @@ void ProcessList_printHeader(ProcessList* this, RichString* header) {
    }
 }
 
-static void ProcessList_add(ProcessList* this, Process* p) {
+void ProcessList_add(ProcessList* this, Process* p) {
    assert(Vector_indexOf(this->processes, p, Process_pidCompare) == -1);
    assert(Hashtable_get(this->processTable, p->pid) == NULL);
    
@@ -316,7 +270,7 @@ static void ProcessList_add(ProcessList* this, Process* p) {
    assert(Hashtable_count(this->processTable) == Vector_count(this->processes));
 }
 
-static void ProcessList_remove(ProcessList* this, Process* p) {
+void ProcessList_remove(ProcessList* this, Process* p) {
    assert(Vector_indexOf(this->processes, p, Process_pidCompare) != -1);
    assert(Hashtable_get(this->processTable, p->pid) != NULL);
    Process* pp = Hashtable_remove(this->processTable, p->pid);
@@ -385,6 +339,7 @@ void ProcessList_sort(ProcessList* this) {
       // Take PID 1 as root and add to the new listing
       int vsize = Vector_size(this->processes);
       Process* init = (Process*) (Vector_take(this->processes, 0));
+      if (!init) return;
       // This assertion crashes on hardened kernels.
       // I wonder how well tree view works on those systems.
       // assert(init->pid == 1);
@@ -408,622 +363,6 @@ void ProcessList_sort(ProcessList* this) {
    }
 }
 
-static bool ProcessList_readStatFile(Process *process, const char* dirname, const char* name, char* command) {
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/stat", dirname, name);
-   int fd = open(filename, O_RDONLY);
-   if (fd == -1)
-      return false;
-
-   static char buf[MAX_READ+1];
-
-   int size = xread(fd, buf, MAX_READ);
-   close(fd);
-   if (size <= 0) return false;
-   buf[size] = '\0';
-
-   assert(process->pid == atoi(buf));
-   char *location = strchr(buf, ' ');
-   if (!location) return false;
-
-   location += 2;
-   char *end = strrchr(location, ')');
-   if (!end) return false;
-   
-   int commsize = end - location;
-   memcpy(command, location, commsize);
-   command[commsize] = '\0';
-   location = end + 2;
-
-   process->state = location[0];
-   location += 2;
-   process->ppid = strtol(location, &location, 10);
-   location += 1;
-   process->pgrp = strtoul(location, &location, 10);
-   location += 1;
-   process->session = strtoul(location, &location, 10);
-   location += 1;
-   process->tty_nr = strtoul(location, &location, 10);
-   location += 1;
-   process->tpgid = strtol(location, &location, 10);
-   location += 1;
-   process->flags = strtoul(location, &location, 10);
-   location += 1;
-   process->minflt = strtoull(location, &location, 10);
-   location += 1;
-   process->cminflt = strtoull(location, &location, 10);
-   location += 1;
-   process->majflt = strtoull(location, &location, 10);
-   location += 1;
-   process->cmajflt = strtoull(location, &location, 10);
-   location += 1;
-   process->utime = strtoull(location, &location, 10);
-   location += 1;
-   process->stime = strtoull(location, &location, 10);
-   location += 1;
-   process->cutime = strtoull(location, &location, 10);
-   location += 1;
-   process->cstime = strtoull(location, &location, 10);
-   location += 1;
-   process->priority = strtol(location, &location, 10);
-   location += 1;
-   process->nice = strtol(location, &location, 10);
-   location += 1;
-   process->nlwp = strtol(location, &location, 10);
-   location += 1;
-   for (int i=0; i<17; i++) location = strchr(location, ' ')+1;
-   process->exit_signal = strtol(location, &location, 10);
-   location += 1;
-   assert(location != NULL);
-   process->processor = strtol(location, &location, 10);
-   assert(location == NULL);
-
-   return true;
-}
-
-static bool ProcessList_statProcessDir(Process* process, const char* dirname, char* name, time_t curTime) {
-   char filename[MAX_NAME+1];
-   filename[MAX_NAME] = '\0';
-
-   snprintf(filename, MAX_NAME, "%s/%s", dirname, name);
-   struct stat sstat;
-   int statok = stat(filename, &sstat);
-   if (statok == -1)
-      return false;
-   process->st_uid = sstat.st_uid;
-  
-   struct tm date;
-   time_t ctime = sstat.st_ctime;
-   process->starttime_ctime = ctime;
-   (void) localtime_r((time_t*) &ctime, &date);
-   strftime(process->starttime_show, 7, ((ctime > curTime - 86400) ? "%R " : "%b%d "), &date);
-   
-   return true;
-}
-
-#ifdef HAVE_TASKSTATS
-
-static void ProcessList_readIoFile(Process* process, const char* dirname, char* name, unsigned long long now) {
-   char filename[MAX_NAME+1];
-   filename[MAX_NAME] = '\0';
-
-   snprintf(filename, MAX_NAME, "%s/%s/io", dirname, name);
-   int fd = open(filename, O_RDONLY);
-   if (fd == -1)
-      return;
-   
-   char buffer[1024];
-   ssize_t buflen = xread(fd, buffer, 1023);
-   close(fd);
-   if (buflen < 1) return;
-   buffer[buflen] = '\0';
-   unsigned long long last_read = process->io_read_bytes;
-   unsigned long long last_write = process->io_write_bytes;
-   char *buf = buffer;
-   char *line = NULL;
-   while ((line = strsep(&buf, "\n")) != NULL) {
-      switch (line[0]) {
-      case 'r':
-         if (line[1] == 'c' && strncmp(line+2, "har: ", 5) == 0)
-            process->io_rchar = strtoull(line+7, NULL, 10);
-         else if (strncmp(line+1, "ead_bytes: ", 11) == 0) {
-            process->io_read_bytes = strtoull(line+12, NULL, 10);
-            process->io_rate_read_bps = 
-               ((double)(process->io_read_bytes - last_read))/(((double)(now - process->io_rate_read_time))/1000);
-            process->io_rate_read_time = now;
-         }
-         break;
-      case 'w':
-         if (line[1] == 'c' && strncmp(line+2, "har: ", 5) == 0)
-            process->io_wchar = strtoull(line+7, NULL, 10);
-         else if (strncmp(line+1, "rite_bytes: ", 12) == 0) {
-            process->io_write_bytes = strtoull(line+13, NULL, 10);
-            process->io_rate_write_bps = 
-               ((double)(process->io_write_bytes - last_write))/(((double)(now - process->io_rate_write_time))/1000);
-            process->io_rate_write_time = now;
-         }
-         break;
-      case 's':
-         if (line[5] == 'r' && strncmp(line+1, "yscr: ", 6) == 0)
-            process->io_syscr = strtoull(line+7, NULL, 10);
-         else if (strncmp(line+1, "yscw: ", 6) == 0)
-            sscanf(line, "syscw: %32llu", &process->io_syscw);
-            process->io_syscw = strtoull(line+7, NULL, 10);
-         break;
-      case 'c':
-         if (strncmp(line+1, "ancelled_write_bytes: ", 22) == 0)
-           process->io_cancelled_write_bytes = strtoull(line+23, NULL, 10);
-      }
-   }
-}
-
-#endif
-
-static bool ProcessList_readStatmFile(Process* process, const char* dirname, const char* name) {
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/statm", dirname, name);
-   int fd = open(filename, O_RDONLY);
-   if (fd == -1)
-      return false;
-   char buf[256];
-   ssize_t rres = xread(fd, buf, 255);
-   close(fd);
-   if (rres < 1) return false;
-
-   char *p = buf;
-   errno = 0;
-   process->m_size = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_resident = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_share = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_trs = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_lrs = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_drs = strtol(p, &p, 10); if (*p == ' ') p++;
-   process->m_dt = strtol(p, &p, 10);
-   return (errno == 0);
-}
-
-#ifdef HAVE_OPENVZ
-
-static void ProcessList_readOpenVZData(ProcessList* this, Process* process, const char* dirname, const char* name) {
-   if ( (!(this->flags & PROCESS_FLAG_OPENVZ)) || (access("/proc/vz", R_OK) != 0)) {
-      process->vpid = process->pid;
-      process->ctid = 0;
-      this->flags |= ~PROCESS_FLAG_OPENVZ;
-      return;
-   }
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/stat", dirname, name);
-   FILE* file = fopen(filename, "r");
-   if (!file) 
-      return;
-   fscanf(file, 
-      "%*32u %*32s %*1c %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %*32u %*32u %*32u %*32u %*32u "
-      "%*32u %*32u %32u %32u",
-      &process->vpid, &process->ctid);
-   fclose(file);
-}
-
-#endif
-
-#ifdef HAVE_CGROUP
-
-static void ProcessList_readCGroupFile(Process* process, const char* dirname, const char* name) {
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/cgroup", dirname, name);
-   FILE* file = fopen(filename, "r");
-   if (!file) {
-      process->cgroup = strdup("");
-      return;
-   }
-   char buffer[256];
-   char *ok = fgets(buffer, 255, file);
-   if (ok) {
-      char* trimmed = String_trim(buffer);
-      int nFields;
-      char** fields = String_split(trimmed, ':', &nFields);
-      free(trimmed);
-      if (nFields >= 3) {
-         process->cgroup = strndup(fields[2] + 1, 10);
-      } else {
-         process->cgroup = strdup("");
-      }
-      String_freeArray(fields);
-   }
-   fclose(file);
-}
-
-#endif
-
-#ifdef HAVE_VSERVER
-
-static void ProcessList_readVServerData(Process* process, const char* dirname, const char* name) {
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/status", dirname, name);
-   FILE* file = fopen(filename, "r");
-   if (!file)
-      return;
-   char buffer[256];
-   process->vxid = 0;
-   while (fgets(buffer, 255, file)) {
-      if (String_startsWith(buffer, "VxID:")) {
-         int vxid;
-         int ok = sscanf(buffer, "VxID:\t%32d", &vxid);
-         if (ok >= 1) {
-            process->vxid = vxid;
-         }
-      }
-      #if defined HAVE_ANCIENT_VSERVER
-      else if (String_startsWith(buffer, "s_context:")) {
-         int vxid;
-         int ok = sscanf(buffer, "s_context:\t%32d", &vxid);
-         if (ok >= 1) {
-            process->vxid = vxid;
-         }
-      }
-      #endif
-   }
-   fclose(file);
-}
-
-#endif
-
-#ifdef HAVE_OOM
-
-static void ProcessList_readOomData(Process* process, const char* dirname, const char* name) {
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/oom_score", dirname, name);
-   FILE* file = fopen(filename, "r");
-   if (!file)
-      return;
-   char buffer[256];
-   if (fgets(buffer, 255, file)) {
-      unsigned int oom;
-      int ok = sscanf(buffer, "%32u", &oom);
-      if (ok >= 1) {
-         process->oom = oom;
-      }
-   }
-   fclose(file);
-}
-
-#endif
-
-static bool ProcessList_readCmdlineFile(Process* process, const char* dirname, const char* name) {
-   if (Process_isKernelThread(process))
-      return true;
-
-   char filename[MAX_NAME+1];
-   snprintf(filename, MAX_NAME, "%s/%s/cmdline", dirname, name);
-   int fd = open(filename, O_RDONLY);
-   if (fd == -1)
-      return false;
-         
-   char command[4096+1]; // max cmdline length on Linux
-   int amtRead = xread(fd, command, sizeof(command) - 1);
-   close(fd);
-   int tokenEnd = 0; 
-   if (amtRead > 0) {
-      for (int i = 0; i < amtRead; i++)
-         if (command[i] == '\0' || command[i] == '\n') {
-            if (tokenEnd == 0) {
-               tokenEnd = i;
-            }
-            command[i] = ' ';
-         }
-   }
-   if (tokenEnd == 0) {
-      tokenEnd = amtRead;
-   }
-   command[amtRead] = '\0';
-   free(process->comm);
-   process->comm = strdup(command);
-   process->basenameOffset = tokenEnd;
-
-   return true;
-}
-
-
-static bool ProcessList_processEntries(ProcessList* this, const char* dirname, Process* parent, double period, struct timeval tv) {
-   DIR* dir;
-   struct dirent* entry;
-
-   time_t curTime = tv.tv_sec;
-   #ifdef HAVE_TASKSTATS
-   unsigned long long now = tv.tv_sec*1000LL+tv.tv_usec/1000LL;
-   #endif
-
-   dir = opendir(dirname);
-   if (!dir) return false;
-   int cpus = this->cpuCount;
-   bool hideKernelThreads = this->hideKernelThreads;
-   bool hideUserlandThreads = this->hideUserlandThreads;
-   while ((entry = readdir(dir)) != NULL) {
-      char* name = entry->d_name;
-
-      // The RedHat kernel hides threads with a dot.
-      // I believe this is non-standard.
-      if ((!this->hideThreads) && name[0] == '.') {
-         name++;
-      }
-
-      // Just skip all non-number directories.
-      if (name[0] < '0' || name[0] > '9') {
-         continue;
-      }
-
-      // filename is a number: process directory
-      int pid = atoi(name);
-     
-      if (parent && pid == parent->pid)
-         continue;
-
-      if (pid <= 0) 
-         continue;
-
-      Process* process = NULL;
-      Process* existingProcess = (Process*) Hashtable_get(this->processTable, pid);
-
-      if (existingProcess) {
-         assert(Vector_indexOf(this->processes, existingProcess, Process_pidCompare) != -1);
-         process = existingProcess;
-         assert(process->pid == pid);
-      } else {
-         process = Process_new(this);
-         assert(process->comm == NULL);
-         process->pid = pid;
-         process->tgid = parent ? parent->pid : pid;
-      }
-
-      char subdirname[MAX_NAME+1];
-      snprintf(subdirname, MAX_NAME, "%s/%s/task", dirname, name);
-      ProcessList_processEntries(this, subdirname, process, period, tv);
-
-      #ifdef HAVE_TASKSTATS
-      if (this->flags & PROCESS_FLAG_IO)
-         ProcessList_readIoFile(process, dirname, name, now);
-      #endif
-
-      if (! ProcessList_readStatmFile(process, dirname, name))
-         goto errorReadingProcess;
-
-      process->show = ! ((hideKernelThreads && Process_isKernelThread(process)) || (hideUserlandThreads && Process_isUserlandThread(process)));
-
-      char command[MAX_NAME+1];
-      unsigned long long int lasttimes = (process->utime + process->stime);
-      if (! ProcessList_readStatFile(process, dirname, name, command))
-         goto errorReadingProcess;
-      if (this->flags & PROCESS_FLAG_IOPRIO)
-         Process_updateIOPriority(process);
-      float percent_cpu = (process->utime + process->stime - lasttimes) / period * 100.0;
-      process->percent_cpu = MAX(MIN(percent_cpu, cpus*100.0), 0.0);
-      if (isnan(process->percent_cpu)) process->percent_cpu = 0.0;
-      process->percent_mem = (process->m_resident * PAGE_SIZE_KB) / (double)(this->totalMem) * 100.0;
-
-      if(!existingProcess) {
-
-         if (! ProcessList_statProcessDir(process, dirname, name, curTime))
-            goto errorReadingProcess;
-
-         process->user = UsersTable_getRef(this->usersTable, process->st_uid);
-
-         #ifdef HAVE_OPENVZ
-         ProcessList_readOpenVZData(this, process, dirname, name);
-         #endif
-         
-         #ifdef HAVE_VSERVER
-         if (this->flags & PROCESS_FLAG_VSERVER)
-            ProcessList_readVServerData(process, dirname, name);
-         #endif
-
-         if (! ProcessList_readCmdlineFile(process, dirname, name))
-            goto errorReadingProcess;
-
-         ProcessList_add(this, process);
-      } else {
-         if (this->updateProcessNames) {
-            if (! ProcessList_readCmdlineFile(process, dirname, name))
-               goto errorReadingProcess;
-         }
-      }
-
-      #ifdef HAVE_CGROUP
-      if (this->flags & PROCESS_FLAG_CGROUP)
-         ProcessList_readCGroupFile(process, dirname, name);
-      #endif
-      
-      #ifdef HAVE_OOM
-      ProcessList_readOomData(process, dirname, name);
-      #endif
-
-      if (process->state == 'Z') {
-         free(process->comm);
-         process->basenameOffset = -1;
-         process->comm = strdup(command);
-      } else if (Process_isThread(process)) {
-         if (this->showThreadNames || Process_isKernelThread(process) || process->state == 'Z') {
-            free(process->comm);
-            process->basenameOffset = -1;
-            process->comm = strdup(command);
-         } else if (this->showingThreadNames) {
-            if (! ProcessList_readCmdlineFile(process, dirname, name))
-               goto errorReadingProcess;
-         }
-         if (Process_isKernelThread(process)) {
-            this->kernelThreads++;
-         } else {
-            this->userlandThreads++;
-         }
-      }
-
-      this->totalTasks++;
-      if (process->state == 'R')
-         this->runningTasks++;
-      process->updated = true;
-
-      continue;
-
-      // Exception handler.
-      errorReadingProcess: {
-         if (process->comm) {
-            free(process->comm);
-            process->basenameOffset = -1;
-            process->comm = NULL;
-         }
-         if (existingProcess)
-            ProcessList_remove(this, process);
-         else
-            Process_delete((Object*)process);
-      }
-   }
-   closedir(dir);
-   return true;
-}
-
-void ProcessList_scan(ProcessList* this) {
-   unsigned long long int usertime, nicetime, systemtime, idletime;
-   unsigned long long int swapFree = 0;
-
-   FILE* file = fopen(PROCMEMINFOFILE, "r");
-   if (file == NULL) {
-      CRT_fatalError("Cannot open " PROCMEMINFOFILE);
-   }
-   int cpus = this->cpuCount;
-   assert(cpus > 0);
-   {
-      char buffer[128];
-      while (fgets(buffer, 128, file)) {
-   
-         switch (buffer[0]) {
-         case 'M':
-            if (String_startsWith(buffer, "MemTotal:"))
-               sscanf(buffer, "MemTotal: %32llu kB", &this->totalMem);
-            else if (String_startsWith(buffer, "MemFree:"))
-               sscanf(buffer, "MemFree: %32llu kB", &this->freeMem);
-            else if (String_startsWith(buffer, "MemShared:"))
-               sscanf(buffer, "MemShared: %32llu kB", &this->sharedMem);
-            break;
-         case 'B':
-            if (String_startsWith(buffer, "Buffers:"))
-               sscanf(buffer, "Buffers: %32llu kB", &this->buffersMem);
-            break;
-         case 'C':
-            if (String_startsWith(buffer, "Cached:"))
-               sscanf(buffer, "Cached: %32llu kB", &this->cachedMem);
-            break;
-         case 'S':
-            if (String_startsWith(buffer, "SwapTotal:"))
-               sscanf(buffer, "SwapTotal: %32llu kB", &this->totalSwap);
-            if (String_startsWith(buffer, "SwapFree:"))
-               sscanf(buffer, "SwapFree: %32llu kB", &swapFree);
-            break;
-         }
-      }
-   }
-
-   this->usedMem = this->totalMem - this->freeMem;
-   this->usedSwap = this->totalSwap - swapFree;
-   fclose(file);
-
-   file = fopen(PROCSTATFILE, "r");
-   if (file == NULL) {
-      CRT_fatalError("Cannot open " PROCSTATFILE);
-   }
-   for (int i = 0; i <= cpus; i++) {
-      char buffer[256];
-      int cpuid;
-      unsigned long long int ioWait, irq, softIrq, steal, guest, guestnice;
-      unsigned long long int systemalltime, idlealltime, totaltime, virtalltime;
-      ioWait = irq = softIrq = steal = guest = guestnice = 0;
-      // Dependending on your kernel version,
-      // 5, 7, 8 or 9 of these fields will be set.
-      // The rest will remain at zero.
-      fgets(buffer, 255, file);
-      if (i == 0)
-         sscanf(buffer, "cpu  %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
-      else {
-         sscanf(buffer, "cpu%4d %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu %16llu", &cpuid, &usertime, &nicetime, &systemtime, &idletime, &ioWait, &irq, &softIrq, &steal, &guest, &guestnice);
-         assert(cpuid == i - 1);
-      }
-      // Guest time is already accounted in usertime
-      usertime = usertime - guest;
-      nicetime = nicetime - guestnice;
-      // Fields existing on kernels >= 2.6
-      // (and RHEL's patched kernel 2.4...)
-      idlealltime = idletime + ioWait;
-      systemalltime = systemtime + irq + softIrq;
-      virtalltime = guest + guestnice;
-      totaltime = usertime + nicetime + systemalltime + idlealltime + steal + virtalltime;
-      CPUData* cpuData = &(this->cpus[i]);
-      assert (usertime >= cpuData->userTime);
-      assert (nicetime >= cpuData->niceTime);
-      assert (systemtime >= cpuData->systemTime);
-      assert (idletime >= cpuData->idleTime);
-      assert (totaltime >= cpuData->totalTime);
-      assert (systemalltime >= cpuData->systemAllTime);
-      assert (idlealltime >= cpuData->idleAllTime);
-      assert (ioWait >= cpuData->ioWaitTime);
-      assert (irq >= cpuData->irqTime);
-      assert (softIrq >= cpuData->softIrqTime);
-      assert (steal >= cpuData->stealTime);
-      assert (virtalltime >= cpuData->guestTime);
-      cpuData->userPeriod = usertime - cpuData->userTime;
-      cpuData->nicePeriod = nicetime - cpuData->niceTime;
-      cpuData->systemPeriod = systemtime - cpuData->systemTime;
-      cpuData->systemAllPeriod = systemalltime - cpuData->systemAllTime;
-      cpuData->idleAllPeriod = idlealltime - cpuData->idleAllTime;
-      cpuData->idlePeriod = idletime - cpuData->idleTime;
-      cpuData->ioWaitPeriod = ioWait - cpuData->ioWaitTime;
-      cpuData->irqPeriod = irq - cpuData->irqTime;
-      cpuData->softIrqPeriod = softIrq - cpuData->softIrqTime;
-      cpuData->stealPeriod = steal - cpuData->stealTime;
-      cpuData->guestPeriod = virtalltime - cpuData->guestTime;
-      cpuData->totalPeriod = totaltime - cpuData->totalTime;
-      cpuData->userTime = usertime;
-      cpuData->niceTime = nicetime;
-      cpuData->systemTime = systemtime;
-      cpuData->systemAllTime = systemalltime;
-      cpuData->idleAllTime = idlealltime;
-      cpuData->idleTime = idletime;
-      cpuData->ioWaitTime = ioWait;
-      cpuData->irqTime = irq;
-      cpuData->softIrqTime = softIrq;
-      cpuData->stealTime = steal;
-      cpuData->guestTime = virtalltime;
-      cpuData->totalTime = totaltime;
-   }
-   double period = (double)this->cpus[0].totalPeriod / cpus; fclose(file);
-
-   // mark all process as "dirty"
-   for (int i = 0; i < Vector_size(this->processes); i++) {
-      Process* p = (Process*) Vector_get(this->processes, i);
-      p->updated = false;
-   }
-   
-   this->totalTasks = 0;
-   this->userlandThreads = 0;
-   this->kernelThreads = 0;
-   this->runningTasks = 0;
-
-   struct timeval tv;
-   gettimeofday(&tv, NULL);
-   ProcessList_processEntries(this, PROCDIR, NULL, period, tv);
-   
-   this->showingThreadNames = this->showThreadNames;
-   
-   for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
-      Process* p = (Process*) Vector_get(this->processes, i);
-      if (p->updated == false)
-         ProcessList_remove(this, p);
-      else
-         p->updated = false;
-   }
-
-}
 
 ProcessField ProcessList_keyAt(ProcessList* this, int at) {
    int x = 0;
@@ -1083,3 +422,4 @@ void ProcessList_rebuildPanel(ProcessList* this, bool flags, int following, cons
       }
    }
 }
+
diff --git a/ProcessList.h b/ProcessList.h
index fce7d03f..2bd5788a 100644
--- a/ProcessList.h
+++ b/ProcessList.h
@@ -15,18 +15,6 @@ in the source distribution for its full text.
 #include "Panel.h"
 #include "Process.h"
 
-#ifndef PROCDIR
-#define PROCDIR "/proc"
-#endif
-
-#ifndef PROCSTATFILE
-#define PROCSTATFILE PROCDIR "/stat"
-#endif
-
-#ifndef PROCMEMINFOFILE
-#define PROCMEMINFOFILE PROCDIR "/meminfo"
-#endif
-
 #ifndef MAX_NAME
 #define MAX_NAME 128
 #endif
@@ -135,12 +123,15 @@ typedef struct ProcessList_ {
 
 } ProcessList;
 
+ProcessList* ProcessList_new(UsersTable* ut, Hashtable* pidWhiteList);
+void ProcessList_scan(ProcessList* pl);
+
 
 extern const char *ProcessList_treeStrAscii[TREE_STR_COUNT];
 
 extern const char *ProcessList_treeStrUtf8[TREE_STR_COUNT];
 
-ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidWhiteList);
+ProcessList* ProcessList_init(ProcessList* this, UsersTable* usersTable, Hashtable* pidWhiteList);
 
 void ProcessList_delete(ProcessList* this);
 
@@ -150,39 +141,21 @@ void ProcessList_invertSortOrder(ProcessList* this);
 
 void ProcessList_printHeader(ProcessList* this, RichString* header);
 
+void ProcessList_add(ProcessList* this, Process* p);
+
+void ProcessList_remove(ProcessList* this, Process* p);
+
 Process* ProcessList_get(ProcessList* this, int idx);
 
 int ProcessList_size(ProcessList* this);
 
 void ProcessList_sort(ProcessList* this);
 
-#ifdef HAVE_TASKSTATS
-
-#endif
-
-#ifdef HAVE_OPENVZ
-
-#endif
-
-#ifdef HAVE_CGROUP
-
-#endif
-
-#ifdef HAVE_VSERVER
-
-#endif
-
-#ifdef HAVE_OOM
-
-#endif
-
-
-void ProcessList_scan(ProcessList* this);
-
 ProcessField ProcessList_keyAt(ProcessList* this, int at);
 
 void ProcessList_expandTree(ProcessList* this);
 
 void ProcessList_rebuildPanel(ProcessList* this, bool flags, int following, const char* incFilter);
 
+
 #endif
diff --git a/RichString.c b/RichString.c
index fb2f2578..51914b08 100644
--- a/RichString.c
+++ b/RichString.c
@@ -174,4 +174,4 @@ void RichString_appendn(RichString* this, int attrs, const char* data, int len)
 
 void RichString_write(RichString* this, int attrs, const char* data) {
    RichString_writeFrom(this, attrs, data, 0, strlen(data));
-}
\ No newline at end of file
+}
diff --git a/configure.ac b/configure.ac
index 63d34842..45279181 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,6 +22,19 @@ AC_DISABLE_SHARED
 AC_ENABLE_STATIC
 AC_PROG_LIBTOOL
 
+# Checks for platform.
+# ----------------------------------------------------------------------
+case "$target" in
+*linux*)
+   my_htop_platform=linux
+   ;;
+*)
+   my_htop_platform=unsupported
+   ;;
+esac
+AM_CONDITIONAL([HTOP_LINUX], [test "$my_htop_platform" = linux])
+AM_CONDITIONAL([HTOP_UNSUPPORTED], [test "$my_htop_platform" = unsupported])
+
 # Checks for libraries.
 # ----------------------------------------------------------------------
 AC_CHECK_LIB([m], [ceil], [], [missing_libraries="$missing_libraries libm"])
@@ -60,17 +73,25 @@ CFLAGS="$save_cflags"
 # Checks for features and flags.
 # ----------------------------------------------------------------------
 PROCDIR=/proc
+
+AC_ARG_ENABLE(proc, [AC_HELP_STRING([--enable-proc], [use Linux-compatible proc filesystem])], enable_proc="yes", enable_proc="no")
+if test "x$enable_proc" = xyes; then
+   AC_DEFINE(HAVE_PROC, 1, [Define if using a Linux-compatible proc filesystem.])
+fi
+
 AC_ARG_WITH(proc, [  --with-proc=DIR      Location of a Linux-compatible proc filesystem (default=/proc).],
 
-   if test -n "$withval"; then
-      AC_DEFINE_UNQUOTED(PROCDIR, "$withval", [Path of proc filesystem])
-      PROCDIR="$withval"
-   fi,
-   AC_DEFINE(PROCDIR, "/proc", [Path of proc filesystem]))
+if test -n "$withval"; then
+   AC_DEFINE_UNQUOTED(PROCDIR, "$withval", [Path of proc filesystem])
+   PROCDIR="$withval"
+fi,
+AC_DEFINE(PROCDIR, "/proc", [Path of proc filesystem]))
 
 if test "x$cross_compiling" = xno; then
-AC_CHECK_FILE($PROCDIR/stat,,AC_MSG_ERROR(Cannot find /proc/stat. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
-AC_CHECK_FILE($PROCDIR/meminfo,,AC_MSG_ERROR(Cannot find /proc/meminfo. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
+   if test "x$enable_proc" = xyes; then
+      AC_CHECK_FILE($PROCDIR/stat,,AC_MSG_ERROR(Cannot find $PROCDIR/stat. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
+      AC_CHECK_FILE($PROCDIR/meminfo,,AC_MSG_ERROR(Cannot find $PROCDIR/meminfo. Make sure you have a Linux-compatible /proc filesystem mounted. See the file README for help.))
+   fi
 fi
 
 AC_ARG_ENABLE(openvz, [AC_HELP_STRING([--enable-openvz], [enable OpenVZ support])], ,enable_openvz="no")
@@ -161,5 +182,6 @@ fi
 
 # We're done, let's go!
 # ----------------------------------------------------------------------
+AC_SUBST(my_htop_platform)
 AC_CONFIG_FILES([Makefile htop.1])
 AC_OUTPUT
diff --git a/htop.c b/htop.c
index 01393e61..e4b4ddf2 100644
--- a/htop.c
+++ b/htop.c
@@ -22,8 +22,9 @@ in the source distribution for its full text.
 #include "TraceScreen.h"
 #include "OpenFilesScreen.h"
 #include "AffinityPanel.h"
-#include "IOPriorityPanel.h"
+#include "Platform.h"
 #include "IncSet.h"
+#include "Action.h"
 #include "htop.h"
 
 #include <unistd.h>
@@ -43,31 +44,6 @@ in the source distribution for its full text.
 
 #define COPYRIGHT "(C) 2004-2014 Hisham Muhammad"
 
-/*{
-
-typedef enum {
-   HTOP_OK = 0x00,
-   HTOP_REFRESH = 0x01,
-   HTOP_RECALCULATE = 0x03, // implies HTOP_REFRESH
-   HTOP_SAVE_SETTINGS = 0x04,
-   HTOP_KEEP_FOLLOWING = 0x08,
-   HTOP_QUIT = 0x10,
-   HTOP_REDRAW_BAR = 0x20,
-   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
-} Htop_Reaction;
-
-typedef Htop_Reaction (*Htop_Action)();
-
-typedef struct State_ {
-   IncSet* inc;
-   Settings* settings;
-   UsersTable* ut;
-} State;
-
-typedef bool(*ForeachProcessFn)(Process*, size_t);
-
-}*/
-
 static void printVersionFlag() {
    fputs("htop " VERSION " - " COPYRIGHT "\n"
          "Released under the GNU GPL.\n\n",
@@ -211,28 +187,9 @@ static void Setup_run(Settings* settings, const Header* header) {
    ScreenManager_delete(scr);
 }
 
-static bool foreachProcess(Panel* panel, ForeachProcessFn fn, int arg, bool* wasAnyTagged) {
-   bool ok = true;
-   bool anyTagged = false;
-   for (int i = 0; i < Panel_size(panel); i++) {
-      Process* p = (Process*) Panel_get(panel, i);
-      if (p->tag) {
-         ok = fn(p, arg) && ok;
-         anyTagged = true;
-      }
-   }
-   if (!anyTagged) {
-      Process* p = (Process*) Panel_getSelected(panel);
-      if (p) ok = fn(p, arg) && ok;
-   }
-   if (wasAnyTagged)
-      *wasAnyTagged = anyTagged;
-   return ok;
-}
-
 static bool changePriority(Panel* panel, int delta) {
    bool anyTagged;
-   bool ok = foreachProcess(panel, (ForeachProcessFn) Process_changePriorityBy, delta, &anyTagged);
+   bool ok = Action_foreachProcess(panel, (Action_ForeachProcessFn) Process_changePriorityBy, delta, &anyTagged);
    if (!ok)
       beep();
    return anyTagged;
@@ -429,24 +386,6 @@ static Htop_Reaction actionInvertSortOrder(Panel* panel, ProcessList* pl) {
    return HTOP_REFRESH | HTOP_SAVE_SETTINGS;
 }
 
-static Htop_Reaction actionSetIOPriority(Panel* panel, ProcessList* pl, Header* header) {
-   (void) panel, (void) pl;
-   Process* p = (Process*) Panel_getSelected(panel);
-   if (!p) return HTOP_OK;
-   IOPriority ioprio = p->ioPriority;
-   Panel* ioprioPanel = IOPriorityPanel_new(ioprio);
-   const char* fuFunctions[] = {"Set    ", "Cancel ", NULL};
-   void* set = pickFromVector(panel, ioprioPanel, 21, fuFunctions, header);
-   if (set) {
-      IOPriority ioprio = IOPriorityPanel_getIOPriority(ioprioPanel);
-      bool ok = foreachProcess(panel, (ForeachProcessFn) Process_setIOPriority, (size_t) ioprio, NULL);
-      if (!ok)
-         beep();
-   }
-   Panel_delete((Object*)ioprioPanel);
-   return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
-}
-
 static Htop_Reaction actionSetSortColumn(Panel* panel, ProcessList* pl, Header* header) {
    return sortBy(panel, pl, header);
 }
@@ -479,11 +418,14 @@ static Htop_Reaction actionSetAffinity(Panel* panel, ProcessList* pl, Header* he
    void* set = pickFromVector(panel, affinityPanel, 15, fuFunctions, header);
    if (set) {
       Affinity* affinity = AffinityPanel_getAffinity(affinityPanel);
-      bool ok = foreachProcess(panel, (ForeachProcessFn) Process_setAffinity, (size_t) affinity, NULL);
+      bool ok = Action_foreachProcess(panel, (Action_ForeachProcessFn) Process_setAffinity, (size_t) affinity, NULL);
       if (!ok) beep();
       Affinity_delete(affinity);
    }
    Panel_delete((Object*)affinityPanel);
+#else
+   (void) panel;
+   (void) header;
 #endif
    return HTOP_REFRESH | HTOP_REDRAW_BAR | HTOP_UPDATE_PANELHDR;
 }
@@ -498,7 +440,7 @@ static Htop_Reaction actionKill(Panel* panel, ProcessList* pl, Header* header) {
          Panel_setHeader(panel, "Sending...");
          Panel_draw(panel, true);
          refresh();
-         foreachProcess(panel, (ForeachProcessFn) Process_sendSignal, (size_t) sgn->key, NULL);
+         Action_foreachProcess(panel, (Action_ForeachProcessFn) Process_sendSignal, (size_t) sgn->key, NULL);
          napms(500);
       }
    }
@@ -596,7 +538,7 @@ static Htop_Reaction actionTagAllChildren(Panel* panel) {
    return HTOP_OK;
 }
 
-void setBindings(Htop_Action* keys) {
+static void setBindings(Htop_Action* keys) {
    keys[KEY_RESIZE] = actionResize;
    keys['M'] = actionSortByMemory;
    keys['T'] = actionSortByTime;
@@ -615,7 +557,6 @@ void setBindings(Htop_Action* keys) {
    keys['['] = actionLowerPriority;
    keys[KEY_F(8)] = actionLowerPriority;
    keys['I'] = actionInvertSortOrder;
-   keys['i'] = actionSetIOPriority;
    keys[KEY_F(6)] = actionExpandCollapseOrSortColumn;
    keys[KEY_F(18)] = actionExpandCollapseOrSortColumn;
    keys['<'] = actionSetSortColumn;
@@ -761,17 +702,7 @@ int main(int argc, char** argv) {
       fprintf(stderr, "Error: could not read procfs (compiled to look in %s).\n", PROCDIR);
       exit(1);
    }
-
-   bool quit = false;
-   int sortTimeout = 0;
-   int resetSortTimeout = 5;
-   bool doRefresh = true;
-   bool forceRecalculate = false;
-   Settings* settings;
    
-   ProcessList* pl = NULL;
-   UsersTable* ut = UsersTable_new();
-
 #ifdef HAVE_LIBNCURSESW
    char *locale = setlocale(LC_ALL, NULL);
    if (locale == NULL || locale[0] == '\0')
@@ -786,13 +717,14 @@ int main(int argc, char** argv) {
       CRT_utf8 = false;
 #endif
 
-   pl = ProcessList_new(ut, pidWhiteList);
+   UsersTable* ut = UsersTable_new();
+   ProcessList* pl = ProcessList_new(ut, pidWhiteList);
    pl->userOnly = userOnly;
    pl->userId = userId;
    Process_getMaxPid();
    
    Header* header = Header_new(pl);
-   settings = Settings_new(pl, header, pl->cpuCount);
+   Settings* settings = Settings_new(pl, header, pl->cpuCount);
    int headerHeight = Header_calculateHeight(header);
 
    // FIXME: move delay code to settings
@@ -839,12 +771,19 @@ int main(int argc, char** argv) {
    
    Htop_Action keys[KEY_MAX] = { NULL };
    setBindings(keys);
+   Platform_setBindings(keys);
    
    State state = {
       .inc = inc,
       .settings = settings,
       .ut = ut,
    };
+
+   bool quit = false;
+   int sortTimeout = 0;
+   int resetSortTimeout = 5;
+   bool doRefresh = true;
+   bool forceRecalculate = false;
    
    while (!quit) {
       gettimeofday(&tv, NULL);
diff --git a/htop.h b/htop.h
index a1369431..77f6e2e8 100644
--- a/htop.h
+++ b/htop.h
@@ -13,33 +13,8 @@ in the source distribution for its full text.
 
 #define COPYRIGHT "(C) 2004-2014 Hisham Muhammad"
 
-
-typedef enum {
-   HTOP_OK = 0x00,
-   HTOP_REFRESH = 0x01,
-   HTOP_RECALCULATE = 0x03, // implies HTOP_REFRESH
-   HTOP_SAVE_SETTINGS = 0x04,
-   HTOP_KEEP_FOLLOWING = 0x08,
-   HTOP_QUIT = 0x10,
-   HTOP_REDRAW_BAR = 0x20,
-   HTOP_UPDATE_PANELHDR = 0x41, // implies HTOP_REFRESH
-} Htop_Reaction;
-
-typedef Htop_Reaction (*Htop_Action)();
-
-typedef struct State_ {
-   IncSet* inc;
-   Settings* settings;
-   UsersTable* ut;
-} State;
-
-typedef bool(*ForeachProcessFn)(Process*, size_t);
-
-
 // ----------------------------------------
 
-void setBindings(Htop_Action* keys);
-
 // ----------------------------------------
 
 int main(int argc, char** argv);