Merge branch 'highlight-new-old-processes'

Thanks to @adsr for the great work
Closes #241, closes #74
Massive rebase, so #keepfingerscrossed

CRT.c

@@ -112,6 +112,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
+      [PROCESS_NEW] = ColorPair(Black, Green),
+      [PROCESS_TOMB] = ColorPair(Black, Red),
       [PROCESS_THREAD] = ColorPair(Green, Black),
       [PROCESS_THREAD_BASENAME] = A_BOLD | ColorPair(Green, Black),
       [BAR_BORDER] = A_BOLD,
@@ -191,6 +193,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD,
       [PROCESS_HIGH_PRIORITY] = A_BOLD,
       [PROCESS_LOW_PRIORITY] = A_DIM,
+      [PROCESS_NEW] = A_BOLD,
+      [PROCESS_TOMB] = A_DIM,
       [PROCESS_THREAD] = A_BOLD,
       [PROCESS_THREAD_BASENAME] = A_REVERSE,
       [BAR_BORDER] = A_BOLD,
@@ -270,6 +274,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, White),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, White),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, White),
+      [PROCESS_NEW] = ColorPair(White, Green),
+      [PROCESS_TOMB] = ColorPair(White, Red),
       [PROCESS_THREAD] = ColorPair(Blue, White),
       [PROCESS_THREAD_BASENAME] = A_BOLD | ColorPair(Blue, White),
       [BAR_BORDER] = ColorPair(Blue, White),
@@ -349,6 +355,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
+      [PROCESS_NEW] = ColorPair(Black, Green),
+      [PROCESS_TOMB] = ColorPair(Black, Red),
       [PROCESS_THREAD] = ColorPair(Blue, Black),
       [PROCESS_THREAD_BASENAME] = A_BOLD | ColorPair(Blue, Black),
       [BAR_BORDER] = ColorPair(Blue, Black),
@@ -428,6 +436,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Blue),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Blue),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Blue),
+      [PROCESS_NEW] = ColorPair(Blue, Green),
+      [PROCESS_TOMB] = ColorPair(Blue, Red),
       [PROCESS_THREAD] = ColorPair(Green, Blue),
       [PROCESS_THREAD_BASENAME] = A_BOLD | ColorPair(Green, Blue),
       [BAR_BORDER] = A_BOLD | ColorPair(Yellow, Blue),
@@ -509,6 +519,8 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [PROCESS_D_STATE] = A_BOLD | ColorPair(Red, Black),
       [PROCESS_HIGH_PRIORITY] = ColorPair(Red, Black),
       [PROCESS_LOW_PRIORITY] = ColorPair(Green, Black),
+      [PROCESS_NEW] = ColorPair(Black, Green),
+      [PROCESS_TOMB] = ColorPair(Black, Red),
       [BAR_BORDER] = A_BOLD | ColorPair(Green, Black),
       [BAR_SHADOW] = ColorPair(Cyan, Black),
       [SWAP] = ColorPair(Red, Black),

CRT.h

@@ -73,6 +73,8 @@ typedef enum ColorElements_ {
    PROCESS_BASENAME,
    PROCESS_HIGH_PRIORITY,
    PROCESS_LOW_PRIORITY,
+   PROCESS_NEW,
+   PROCESS_TOMB,
    PROCESS_THREAD,
    PROCESS_THREAD_BASENAME,
    BAR_BORDER,

DisplayOptionsPanel.c

@@ -93,6 +93,7 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Also show CPU percentage numerically"), &(settings->showCPUUsage)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Also show CPU frequency"), &(settings->showCPUFrequency)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Enable the mouse"), &(settings->enableMouse)));
+   Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Highlight new and old processes"), &(settings->highlightChanges)));
    #ifdef HAVE_LIBHWLOC
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Show topology when selecting affinity by default"), &(settings->topologyAffinity)));
    #endif

Panel.c

@@ -273,16 +273,18 @@ void Panel_draw(Panel* this, bool focus) {
          Object_display(itemObj, &item);
          int itemLen = RichString_sizeVal(item);
          int amt = MINIMUM(itemLen - scrollH, this->w);
-         bool selected = (i == this->selected);
+         if (i == this->selected) {
-         if (selected) {
+            item.highlightAttr = selectionColor;
-            attrset(selectionColor);
+         }
-            RichString_setAttr(&item, selectionColor);
+         if (item.highlightAttr) {
+            attrset(item.highlightAttr);
+            RichString_setAttr(&item, item.highlightAttr);
             this->selectedLen = itemLen;
          }
          mvhline(y + line, x, ' ', this->w);
          if (amt > 0)
             RichString_printoffnVal(item, y + line, x, scrollH, amt);
-         if (selected)
+         if (item.highlightAttr)
             attrset(CRT_colors[RESET_COLOR]);
          RichString_end(item);
          line++;

Process.c

@@ -76,7 +76,7 @@ void Process_humanNumber(RichString* str, unsigned long long number, bool colori
       RichString_appendn(str, processColor, buffer, len);
    } else if (number < 100000) {
       //2 digit MB, 3 digit KB
-      len = snprintf(buffer, 10, "%2llu", number / 1000);
+      len = snprintf(buffer, 10, "%2llu", number/1000);
       RichString_appendn(str, processMegabytesColor, buffer, len);
       number %= 1000;
       len = snprintf(buffer, 10, "%03llu ", number);
@@ -89,7 +89,7 @@ void Process_humanNumber(RichString* str, unsigned long long number, bool colori
    } else if (number < 10000 * ONE_K) {
       //1 digit GB, 3 digit MB
       number /= ONE_K;
-      len = snprintf(buffer, 10, "%1llu", number / 1000);
+      len = snprintf(buffer, 10, "%1llu", number/1000);
       RichString_appendn(str, processGigabytesColor, buffer, len);
       number %= 1000;
       len = snprintf(buffer, 10, "%03lluM ", number);
@@ -97,7 +97,7 @@ void Process_humanNumber(RichString* str, unsigned long long number, bool colori
    } else if (number < 100000 * ONE_K) {
       //2 digit GB, 1 digit MB
       number /= 100 * ONE_K;
-      len = snprintf(buffer, 10, "%2llu", number / 10);
+      len = snprintf(buffer, 10, "%2llu", number/10);
       RichString_appendn(str, processGigabytesColor, buffer, len);
       number %= 10;
       len = snprintf(buffer, 10, ".%1lluG ", number);
@@ -110,14 +110,14 @@ void Process_humanNumber(RichString* str, unsigned long long number, bool colori
    } else if (number < 10000ULL * ONE_M) {
       //1 digit TB, 3 digit GB
       number /= ONE_M;
-      len = snprintf(buffer, 10, "%1llu", number / 1000);
+      len = snprintf(buffer, 10, "%1llu", number/1000);
       RichString_appendn(str, largeNumberColor, buffer, len);
       number %= 1000;
       len = snprintf(buffer, 10, "%03lluG ", number);
       RichString_appendn(str, processGigabytesColor, buffer, len);
    } else {
       //2 digit TB and above
-      len = snprintf(buffer, 10, "%4.1lfT ", (double)number / ONE_G);
+      len = snprintf(buffer, 10, "%4.1lfT ", (double)number/ONE_G);
       RichString_appendn(str, largeNumberColor, buffer, len);
    }
 }
@@ -144,18 +144,18 @@ void Process_colorNumber(RichString* str, unsigned long long number, bool colori
    } else if (number >= 100LL * ONE_DECIMAL_T) {
       xSnprintf(buffer, 13, "%11llu ", number / ONE_DECIMAL_M);
       RichString_appendn(str, largeNumberColor, buffer, 8);
-      RichString_appendn(str, processMegabytesColor, buffer + 8, 4);
+      RichString_appendn(str, processMegabytesColor, buffer+8, 4);
    } else if (number >= 10LL * ONE_DECIMAL_G) {
       xSnprintf(buffer, 13, "%11llu ", number / ONE_DECIMAL_K);
       RichString_appendn(str, largeNumberColor, buffer, 5);
-      RichString_appendn(str, processMegabytesColor, buffer + 5, 3);
+      RichString_appendn(str, processMegabytesColor, buffer+5, 3);
-      RichString_appendn(str, processColor, buffer + 8, 4);
+      RichString_appendn(str, processColor, buffer+8, 4);
    } else {
       xSnprintf(buffer, 13, "%11llu ", number);
       RichString_appendn(str, largeNumberColor, buffer, 2);
-      RichString_appendn(str, processMegabytesColor, buffer + 2, 3);
+      RichString_appendn(str, processMegabytesColor, buffer+2, 3);
-      RichString_appendn(str, processColor, buffer + 5, 3);
+      RichString_appendn(str, processColor, buffer+5, 3);
-      RichString_appendn(str, processShadowColor, buffer + 8, 4);
+      RichString_appendn(str, processShadowColor, buffer+8, 4);
    }
 }
 
@@ -291,11 +291,11 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
 
          for (int i = 0; i < 32; i++) {
             if (indent & (1U << i)) {
-               maxIndent = i + 1;
+               maxIndent = i+1;
             }
          }
 
-         for (int i = 0; i < maxIndent - 1; i++) {
+          for (int i = 0; i < maxIndent - 1; i++) {
             int written, ret;
             if (indent & (1 << i)) {
                ret = snprintf(buf, n, "%s  ", CRT_treeStr[TREE_STR_VERT]);
@@ -333,7 +333,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
    case PID: xSnprintf(buffer, n, Process_pidFormat, this->pid); break;
    case PPID: xSnprintf(buffer, n, Process_pidFormat, this->ppid); break;
    case PRIORITY: {
-      if (this->priority <= -100)
+      if(this->priority <= -100)
          xSnprintf(buffer, n, " RT ");
       else
          xSnprintf(buffer, n, "%3ld ", this->priority);
@@ -394,6 +394,14 @@ void Process_display(const Object* cast, RichString* out) {
       RichString_setAttr(out, CRT_colors[PROCESS_TAG]);
    }
 
+   if (this->settings->highlightChanges) {
+      if (Process_isTomb(this)) {
+         out->highlightAttr = CRT_colors[PROCESS_TOMB];
+      } else if (Process_isNew(this)) {
+         out->highlightAttr = CRT_colors[PROCESS_NEW];
+      }
+   }
+
    assert(out->chlen > 0);
 }
 
@@ -429,6 +437,18 @@ void Process_toggleTag(Process* this) {
    this->tag = this->tag == true ? false : true;
 }
 
+bool Process_isNew(const Process* this) {
+   assert(this->processList);
+   if (this->processList->scanTs >= this->seenTs) {
+      return this->processList->scanTs - this->seenTs <= this->processList->settings->highlightDelaySecs;
+   }
+   return false;
+}
+
+bool Process_isTomb(const Process* this) {
+    return this->tombTs > 0;
+}
+
 bool Process_setPriority(Process* this, int priority) {
    CRT_dropPrivileges();
    int old_prio = getpriority(PRIO_PROCESS, this->pid);

Process.h

@@ -9,18 +9,19 @@ in the source distribution for its full text.
 */
 
 #include <stdbool.h>
+#include <time.h>
 #include <sys/types.h>
 
 #include "Object.h"
 #include "RichString.h"
 
-
 #ifdef __ANDROID__
 #define SYS_ioprio_get __NR_ioprio_get
 #define SYS_ioprio_set __NR_ioprio_set
 #endif
 
 #define PROCESS_FLAG_IO 0x0001
+#define DEFAULT_HIGHLIGHT_SECS 5
 
 typedef enum ProcessFields {
    NULL_PROCESSFIELD = 0,
@@ -59,6 +60,7 @@ struct Settings_;
 typedef struct Process_ {
    Object super;
 
+   const struct ProcessList_* processList;
    const struct Settings_* settings;
 
    unsigned long long int time;
@@ -76,6 +78,7 @@ typedef struct Process_ {
    bool tag;
    bool showChildren;
    bool show;
+   bool wasShown;
    unsigned int pgrp;
    unsigned int session;
    unsigned int tty_nr;
@@ -99,6 +102,9 @@ typedef struct Process_ {
 
    int exit_signal;
 
+   time_t seenTs;
+   time_t tombTs;
+
    unsigned long int minflt;
    unsigned long int majflt;
 } Process;
@@ -119,7 +125,7 @@ extern ProcessFieldData Process_fields[];
 extern ProcessPidColumn Process_pidColumns[];
 extern char Process_pidFormat[20];
 
-typedef Process* (* Process_New)(const struct Settings_*);
+typedef Process*(*Process_New)(const struct Settings_*);
 typedef void (*Process_WriteField)(const Process*, RichString*, ProcessField);
 
 typedef struct ProcessClass_ {
@@ -172,6 +178,10 @@ void Process_init(Process* this, const struct Settings_* settings);
 
 void Process_toggleTag(Process* this);
 
+bool Process_isNew(const Process* this);
+
+bool Process_isTomb(const Process* this);
+
 bool Process_setPriority(Process* this, int priority);
 
 bool Process_changePriorityBy(Process* this, Arg delta);

ProcessList.c

@@ -9,6 +9,7 @@ in the source distribution for its full text.
 
 #include <assert.h>
 #include <string.h>
+#include <time.h>
 
 #include "CRT.h"
 #include "XUtils.h"
@@ -27,6 +28,8 @@ ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, Users
    // set later by platform-specific code
    this->cpuCount = 0;
 
+   this->scanTs = 0;
+
 #ifdef HAVE_LIBHWLOC
    this->topologyOk = false;
    if (hwloc_topology_init(&this->topology) == 0) {
@@ -85,6 +88,10 @@ void ProcessList_printHeader(ProcessList* this, RichString* header) {
 void ProcessList_add(ProcessList* this, Process* p) {
    assert(Vector_indexOf(this->processes, p, Process_pidCompare) == -1);
    assert(Hashtable_get(this->processTable, p->pid) == NULL);
+   p->processList = this;
+
+   // highlighting processes found in first scan by first scan marked "far in the past"
+   p->seenTs = this->scanTs;
 
    Vector_add(this->processes, p);
    Hashtable_put(this->processTable, p->pid, p);
@@ -145,10 +152,10 @@ static void ProcessList_buildTree(ProcessList* this, pid_t pid, int level, int i
          Vector_insert(this->processes2, 0, process);
       }
 
-      assert(Vector_size(this->processes2) == s + 1); (void)s;
+      assert(Vector_size(this->processes2) == s+1); (void)s;
 
       int nextIndent = indent | (1 << level);
-      ProcessList_buildTree(this, process->pid, level + 1, (i < size - 1) ? nextIndent : indent, direction, show ? process->showChildren : false);
+      ProcessList_buildTree(this, process->pid, level+1, (i < size - 1) ? nextIndent : indent, direction, show ? process->showChildren : false);
 
       if (i == size - 1) {
          process->indent = -nextIndent;
@@ -160,8 +167,8 @@ static void ProcessList_buildTree(ProcessList* this, pid_t pid, int level, int i
 }
 
 static long ProcessList_treeProcessCompare(const void* v1, const void* v2) {
-   const Process* p1 = (const Process*)v1;
+   const Process *p1 = (const Process*)v1;
-   const Process* p2 = (const Process*)v2;
+   const Process *p2 = (const Process*)v2;
 
    return p1->pid - p2->pid;
 }
@@ -304,6 +311,7 @@ Process* ProcessList_getProcess(ProcessList* this, pid_t pid, bool* preExisting,
 }
 
 void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
+   struct timespec now;
 
    // in pause mode only gather global data for meters (CPU/memory/...)
    if (pauseProcessUpdate) {
@@ -315,6 +323,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    for (int i = 0; i < Vector_size(this->processes); i++) {
       Process* p = (Process*) Vector_get(this->processes, i);
       p->updated = false;
+      p->wasShown = p->show;
       p->show = true;
    }
 
@@ -323,12 +332,34 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    this->kernelThreads = 0;
    this->runningTasks = 0;
 
+
+   // set scanTs
+   static bool firstScanDone = false;
+   if (!firstScanDone) {
+      this->scanTs = 0;
+      firstScanDone = true;
+   } else if (clock_gettime(CLOCK_MONOTONIC, &now) == 0) {
+      this->scanTs = now.tv_sec;
+   }
+
    ProcessList_goThroughEntries(this, false);
 
    for (int i = Vector_size(this->processes) - 1; i >= 0; i--) {
       Process* p = (Process*) Vector_get(this->processes, i);
-      if (p->updated == false) {
+      if (p->tombTs > 0) {
+         // remove tombed process
+         if (this->scanTs >= p->tombTs) {
          ProcessList_remove(this, p);
+         }
+      } else if (p->updated == false) {
+         // process no longer exists
+         if (this->settings->highlightChanges && p->wasShown) {
+            // mark tombed
+            p->tombTs = this->scanTs + this->settings->highlightDelaySecs;
+         } else {
+            // immediately remove
+            ProcessList_remove(this, p);
+         }
       } else {
          p->updated = false;
       }

ProcessList.h

@@ -70,6 +70,7 @@ typedef struct ProcessList_ {
 
    int cpuCount;
 
+   time_t scanTs;
 } ProcessList;
 
 ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId);

RichString.h

@@ -39,6 +39,7 @@ typedef struct RichString_ {
    int chlen;
    CharType* chptr;
    CharType chstr[RICHSTRING_MAXLEN + 1];
+   int highlightAttr;
 } RichString;
 
 void RichString_setAttrn(RichString* this, int attrs, int start, int finish);

ScreenManager.c

@@ -102,6 +102,7 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    struct timeval tv;
    gettimeofday(&tv, NULL);
    double newTime = ((double)tv.tv_sec * 10) + ((double)tv.tv_usec / 100000);
+
    *timedOut = (newTime - *oldTime > this->settings->delay);
    *rescan |= *timedOut;
 

Settings.c

@@ -157,6 +157,10 @@ static bool Settings_read(Settings* this, const char* fileName, int initialCpuCo
          this->highlightMegabytes = atoi(option[1]);
       } else if (String_eq(option[0], "highlight_threads")) {
          this->highlightThreads = atoi(option[1]);
+      } else if (String_eq(option[0], "highlight_changes")) {
+         this->highlightChanges = atoi(option[1]);
+      } else if (String_eq(option[0], "highlight_changes_delay_secs")) {
+         this->highlightDelaySecs = atoi(option[1]);
       } else if (String_eq(option[0], "header_margin")) {
          this->headerMargin = atoi(option[1]);
       } else if (String_eq(option[0], "expand_system_time")) {
@@ -265,6 +269,8 @@ bool Settings_write(Settings* this) {
    fprintf(fd, "highlight_base_name=%d\n", (int) this->highlightBaseName);
    fprintf(fd, "highlight_megabytes=%d\n", (int) this->highlightMegabytes);
    fprintf(fd, "highlight_threads=%d\n", (int) this->highlightThreads);
+   fprintf(fd, "highlight_changes=%d\n", (int) this->highlightChanges);
+   fprintf(fd, "highlight_changes_delay_secs=%d\n", (int) this->highlightDelaySecs);
    fprintf(fd, "tree_view=%d\n", (int) this->treeView);
    fprintf(fd, "header_margin=%d\n", (int) this->headerMargin);
    fprintf(fd, "detailed_cpu_time=%d\n", (int) this->detailedCPUTime);
@@ -306,6 +312,8 @@ Settings* Settings_new(int initialCpuCount) {
    this->updateProcessNames = false;
    this->showProgramPath = true;
    this->highlightThreads = true;
+   this->highlightChanges = false;
+   this->highlightDelaySecs = DEFAULT_HIGHLIGHT_SECS;
    #ifdef HAVE_LIBHWLOC
    this->topologyAffinity = false;
    #endif

Settings.h

@@ -47,6 +47,8 @@ typedef struct Settings_ {
    bool highlightBaseName;
    bool highlightMegabytes;
    bool highlightThreads;
+   bool highlightChanges;
+   int highlightDelaySecs;
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;

htop.1.in

@@ -4,7 +4,7 @@ htop \- interactive process viewer
 .SH "SYNOPSIS"
 .LP
 .B htop
-.RB [ \-dCFhpustv ]
+.RB [ \-dCFhpustvH ]
 .SH "DESCRIPTION"
 .LP
 .B htop
@@ -62,6 +62,9 @@ Output version information and exit
 .TP
 \fB\-t \-\-tree
 Show processes in tree view
+.TP
+\fB\-H \-\-highlight-changes=DELAY\fR
+Highlight new and old processes
 .SH "INTERACTIVE COMMANDS"
 .LP
 The following commands are supported while in

htop.c

@@ -50,8 +50,9 @@ static void printHelpFlag(void) {
          "-d --delay=DELAY            Set the delay between updates, in tenths of seconds\n"
          "-F --filter=FILTER          Show only the commands matching the given filter\n"
          "-h --help                   Print this help screen\n"
+         "-H --highlight-changes[=DELAY]  Highlight new and old processes\n"
          "-M --no-mouse               Disable the mouse\n"
-         "-p --pid=PID,[,PID,PID...]  Show only the given PIDs\n"
+         "-p --pid=PID[,PID,PID...]       Show only the given PIDs\n"
          "-s --sort-key=COLUMN        Sort by COLUMN (try --sort-key=help for a list)\n"
          "-t --tree                   Show the tree view by default\n"
          "-u --user[=USERNAME]        Show only processes for a given user (or $USER)\n"
@@ -76,6 +77,8 @@ typedef struct CommandLineSettings_ {
    bool enableMouse;
    bool treeView;
    bool allowUnicode;
+   bool highlightChanges;
+   int highlightDelaySecs;
 } CommandLineSettings;
 
 static CommandLineSettings parseArguments(int argc, char** argv) {
@@ -90,6 +93,8 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
       .enableMouse = true,
       .treeView = false,
       .allowUnicode = true,
+      .highlightChanges = false,
+      .highlightDelaySecs = -1,
    };
 
    static struct option long_opts[] =
@@ -106,12 +111,13 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
       {"tree",       no_argument,         0, 't'},
       {"pid",        required_argument,   0, 'p'},
       {"filter",     required_argument,   0, 'F'},
-      {0, 0, 0, 0}
+      {"highlight-changes", optional_argument, 0, 'H'},
+      {0,0,0,0}
    };
 
-   int opt, opti = 0;
+   int opt, opti=0;
    /* Parse arguments */
-   while ((opt = getopt_long(argc, argv, "hVMCs:td:u::Up:F:", long_opts, &opti))) {
+   while ((opt = getopt_long(argc, argv, "hVMCs:td:u::Up:F:H::", long_opts, &opti))) {
       if (opt == EOF) break;
       switch (opt) {
          case 'h':
@@ -186,11 +192,11 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
             char* saveptr;
             char* pid = strtok_r(argCopy, ",", &saveptr);
 
-            if (!flags.pidMatchList) {
+            if(!flags.pidMatchList) {
                flags.pidMatchList = Hashtable_new(8, false);
             }
 
-            while (pid) {
+            while(pid) {
                 unsigned int num_pid = atoi(pid);
                 //  deepcode ignore CastIntegerToAddress: we just want a non-NUll pointer here
                 Hashtable_put(flags.pidMatchList, num_pid, (void *) 1);
@@ -206,6 +212,24 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
 
             break;
          }
+         case 'H': {
+            const char *delay = optarg;
+            if (!delay && optind < argc && argv[optind] != NULL &&
+                (argv[optind][0] != '\0' && argv[optind][0] != '-')) {
+                delay = argv[optind++];
+            }
+            if (delay) {
+                if (sscanf(delay, "%16d", &(flags.highlightDelaySecs)) == 1) {
+                   if (flags.highlightDelaySecs < 1)
+                      flags.highlightDelaySecs = 1;
+                } else {
+                   fprintf(stderr, "Error: invalid highlight delay value \"%s\".\n", delay);
+                   exit(1);
+                }
+            }
+            flags.highlightChanges = true;
+            break;
+         }
          default:
             exit(1);
       }
@@ -218,7 +242,7 @@ static void millisleep(unsigned long millisec) {
       .tv_sec = 0,
       .tv_nsec = millisec * 1000000L
    };
-   while (nanosleep(&req, &req) == -1) {
+   while(nanosleep(&req,&req)==-1) {
       continue;
    }
 }
@@ -242,7 +266,7 @@ static void setCommFilter(State* state, char** commFilter) {
 
 int main(int argc, char** argv) {
 
-   char* lc_ctype = getenv("LC_CTYPE");
+   char *lc_ctype = getenv("LC_CTYPE");
    if (lc_ctype != NULL) {
       setlocale(LC_CTYPE, lc_ctype);
    } else if ((lc_ctype = getenv("LC_ALL"))) {
@@ -284,6 +308,12 @@ int main(int argc, char** argv) {
    if (flags.treeView) {
       settings->treeView = true;
    }
+   if (flags.highlightChanges) {
+      settings->highlightChanges = true;
+   }
+   if (flags.highlightDelaySecs != -1) {
+      settings->highlightDelaySecs = flags.highlightDelaySecs;
+   }
 
    CRT_init(settings->delay, settings->colorScheme, flags.allowUnicode);
 
@@ -323,7 +353,7 @@ int main(int argc, char** argv) {
    ScreenManager_run(scr, NULL, NULL);
 
    attron(CRT_colors[RESET_COLOR]);
-   mvhline(LINES - 1, 0, ' ', COLS);
+   mvhline(LINES-1, 0, ' ', COLS);
    attroff(CRT_colors[RESET_COLOR]);
    refresh();
 
@@ -339,7 +369,7 @@ int main(int argc, char** argv) {
    UsersTable_delete(ut);
    Settings_delete(settings);
 
-   if (flags.pidMatchList) {
+   if(flags.pidMatchList) {
       Hashtable_delete(flags.pidMatchList);
    }
    return 0;