Add ELAPSED process column

Add process columns showing the elapsed time since the process was
started.
Similar to STARTTIME, but shows the time passed since the process start
instead of the fixed start time of the process.

Closes https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=782636

1 files changed, 4 insertions, 0 deletions

diff --git a/Process.c b/Process.c
index f134be53..b2eb5a01 100644
--- a/Process.c
+++ b/Process.c
@@ -777,6 +777,7 @@ void Process_writeField(const Process* this, RichString* str, ProcessField field
       Process_printLeftAlignedField(str, attr, procExe, TASK_COMM_LEN - 1);
       return;
    }
+   case ELAPSED: Process_printTime(str, /* convert to hundreds of a second */ this->processList->realtimeMs / 10 - 100 * this->starttime_ctime, coloring); return;
    case MAJFLT: Process_printCount(str, this->majflt, coloring); return;
    case MINFLT: Process_printCount(str, this->minflt, coloring); return;
    case M_RESIDENT: Process_printKBytes(str, this->m_resident, coloring); return;
@@ -1073,6 +1074,9 @@ int Process_compareByKey_Base(const Process* p1, const Process* p2, ProcessField
       const char *exe2 = p2->procExe ? (p2->procExe + p2->procExeBasenameOffset) : (Process_isKernelThread(p2) ? kthreadID : "");
       return SPACESHIP_NULLSTR(exe1, exe2);
    }
+   case ELAPSED:
+      r = -SPACESHIP_NUMBER(p1->starttime_ctime, p2->starttime_ctime);
+      return r != 0 ? r : SPACESHIP_NUMBER(p1->pid, p2->pid);
    case MAJFLT:
       return SPACESHIP_NUMBER(p1->majflt, p2->majflt);
    case MINFLT: