Track process uptime

kernel/proc/proc.c

@@ -15,6 +15,7 @@
 #include "ipc/pipe/pipe.h"
 #include "sysdefs/proc.h"
 #include "sysdefs/fs.h"
+#include "time/time.h"
 
 #define PROC_REAPER_FREQ 30
 
@@ -147,6 +148,8 @@ Proc *proc_spawnuser(char *mountpoint, char *path) {
   proc->pipes[1] = dlmalloc(sizeof(IpcPipe));
   ipc_pipeinit(proc->pipes[1], proc->pid);
 
+  time_get(&proc->time);
+
   return proc;
 }
 

kernel/proc/proc.h

@@ -8,6 +8,7 @@
 #include "vfs/vfs.h"
 #include "ipc/pipe/pipe.h"
 #include "sysdefs/proc.h"
+#include "sysdefs/time.h"
 #include "dev/dev.h"
 
 #define PROC_NAME_MAX 0x100
@@ -68,6 +69,8 @@ typedef struct Proc {
   } procargs;
 
   uint64_t mman_map_base;
+
+  Time time;
 } Proc;
 
 typedef struct {

kernel/syscall/proc.c

@@ -226,6 +226,8 @@ int32_t SYSCALL2(sys_proc_stat, pidx, pstat1) {
       LL_FOREACH_SAFE(p->vas, vas, vastmp) {
         stat->usemem += vas->size;
       }
+
+      hal_memcpy(&stat->time, &p->time, sizeof(p->time));
       break;
     }
   }

kernel/time/time.c

@@ -94,3 +94,45 @@ timeunix_t time_tounix(Time *time) {
   secs += time->second;
   return secs;
 }
+
+void timeunix_totime(timeunix_t unix, Time *time) {
+  uint64_t days = unix / 86400;
+  uint32_t rem = days % 86400;
+
+  time->hour = rem / 3600;
+  time->minute = (rem % 3600) / 60;
+  time->second = rem % 60;
+
+  uint32_t year = 1970;
+  for (;;) {
+    uint32_t ydays = time_isleap(year) ? 366 : 365;
+    if (days >= ydays) {
+      days -= ydays;
+      year++;
+    } else {
+      break;
+    }
+  }
+  time->year = year;
+
+  bool leap = time_isleap(year);
+  uint32_t month = 0;
+  while (month < 11) {
+    uint32_t next = days_before_month[month + 1];
+    if (leap && month + 1 > 1) {
+      next++;
+    }
+    if (days < next) {
+      break;
+    }
+    month++;
+  }
+
+  uint32_t month_start = days_before_month[month];
+  if (leap && month > 1) {
+    month_start++;
+  }
+
+  time->month = month + 1;
+  time->day = (days - month_start) + 1;
+}

share/sysdefs/proc.h

@@ -1,6 +1,8 @@
 #ifndef SHARE_SYSDEFS_PROC_H_
 #define SHARE_SYSDEFS_PROC_H_
 
+#include "time.h"
+
 #define PROC_ARG_MAX 128
 
 typedef struct {
@@ -8,6 +10,7 @@ typedef struct {
   char name[0x100];
   uint8_t state;
   size_t usemem;
+  Time time;
 } ProcStat;
 
 typedef uint64_t PID_t;