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Implement waitpid() support for getting the waitee's exit code.

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This commit is contained in:
Andreas Kling 2018-10-27 01:24:22 +02:00
parent 5cfeeede7c
commit ec07761d0f
7 changed files with 33 additions and 10 deletions
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16
Kernel/Task.cpp
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@ -450,8 +450,13 @@ void Task::sys$exit(int status)
s_tasks->remove(this);
for (auto* task = s_tasks->head(); task; task = task->next()) {
if (task->waitee() == m_pid)
task->m_waiteeStatus = status << 8;
}
if (!scheduleNewTask()) {
kprintf("Task::taskDidCrash: Failed to schedule a new task :(\n");
kprintf("Task::sys$exit: Failed to schedule a new task :(\n");
HANG;
}
@ -752,7 +757,6 @@ int Task::sys$chdir(const char* path)
if (!handle->isDirectory())
return -ENOTDIR;
m_cwd = handle->vnode();
kprintf("m_cwd <- %p (%u)\n", m_cwd.ptr(), handle->vnode()->inode.index());
return 0;
}
@ -844,14 +848,20 @@ pid_t Task::sys$getpid()
return m_pid;
}
pid_t Task::sys$waitpid(pid_t waitee)
pid_t Task::sys$waitpid(pid_t waitee, int* wstatus, int options)
{
if (wstatus)
VALIDATE_USER_BUFFER(wstatus, sizeof(int));
InterruptDisabler disabler;
if (!Task::fromPID(waitee))
return -1;
m_waitee = waitee;
m_waiteeStatus = 0;
block(BlockedWait);
yield();
if (wstatus)
*wstatus = m_waiteeStatus;
return m_waitee;
}