Add a "sleep" syscall that sleeps for N seconds.

Kernel/ProcFileSystem.cpp

@@ -24,9 +24,9 @@ bool ProcFileSystem::initialize()
         auto stringImpl = StringImpl::createUninitialized(tasks.size() * 256, buffer);
         memset(buffer, 0, stringImpl->length());
         char* ptr = buffer;
-        ptr += ksprintf(ptr, "PID    OWNER      STATE  PPID  NSCHED  FDS    NAME\n");
+        ptr += ksprintf(ptr, "PID    OWNER      STATE  PPID  NSCHED      FDS    NAME\n");
         for (auto* task : tasks) {
-            ptr += ksprintf(ptr, "%w   %w:%w  %b     %w  %w    %w   %s\n",
+            ptr += ksprintf(ptr, "%w   %w:%w  %b     %w  %x    %w   %s\n",
                 task->pid(),
                 task->uid(),
                 task->gid(),

Kernel/Syscall.cpp

@@ -61,7 +61,6 @@ DWORD handle(DWORD function, DWORD arg1, DWORD arg2, DWORD arg3)
         Console::the().putChar(arg1 & 0xff);
         break;
     case Syscall::Sleep:
-        //kprintf("syscall: sleep(%d)\n", arg1);
         current->sys$sleep(arg1);
         break;
     case Syscall::Spawn:

Kernel/Task.cpp

@@ -10,6 +10,7 @@
 #include <ELFLoader/ExecSpace.h>
 #include "MemoryManager.h"
 #include "errno.h"
+#include "i8253.h"
 
 //#define DEBUG_IO
 //#define TASK_DEBUG
@@ -719,6 +720,14 @@ int Task::sys$kill(pid_t pid, int sig)
     return -1;
 }
 
+int Task::sys$sleep(unsigned seconds)
+{
+    if (!seconds)
+        return 0;
+    sleep(seconds * TICKS_PER_SECOND);
+    return 0;
+}
+
 uid_t Task::sys$getuid()
 {
     return m_uid;
@@ -773,12 +782,6 @@ void sleep(DWORD ticks)
     yield();
 }
 
-void Task::sys$sleep(DWORD ticks)
-{
-    ASSERT(this == current);
-    sleep(ticks);
-}
-
 Task* Task::kernelTask()
 {
     ASSERT(s_kernelTask);

Kernel/Task.h

@@ -91,7 +91,6 @@ public:
     int sys$seek(int fd, int offset);
     int sys$kill(pid_t pid, int sig);
     int sys$geterror() { return m_error; }
-    void sys$sleep(DWORD ticks);
     void sys$exit(int status);
     int sys$spawn(const char* path);
     pid_t sys$waitpid(pid_t);
@@ -99,6 +98,7 @@ public:
     int sys$munmap(void*, size_t size);
     int sys$get_dir_entries(int fd, void*, size_t);
     int sys$getcwd(char*, size_t);
+    int sys$sleep(unsigned seconds);
 
     static void initialize();
 

Kernel/sync-sh

@@ -5,5 +5,6 @@ cp ../Userland/id mnt/bin/id
 cp ../Userland/ps mnt/bin/ps
 cp ../Userland/ls mnt/bin/ls
 cp ../Userland/pwd mnt/bin/pwd
+cp ../Userland/sleep mnt/bin/sleep
 umount mnt
 sync