29 lines
719 B
C++
29 lines
719 B
C++
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#include "memory/MemoryManager.h"
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#include "sys/Syscall.h"
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#include "thread/Scheduler.h"
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#include <bits/waitpid.h>
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Result<u64> sys_waitpid(Registers*, SyscallArgs args)
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{
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pid_t pid = (pid_t)args[0];
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int* status_ptr = (int*)args[1];
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int options = (int)args[2];
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Thread* thread = TRY(Result<Thread*>::from_option(Scheduler::find_by_pid(pid), ESRCH));
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while (thread->state != ThreadState::Exited)
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{
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if (options & WNOHANG) return err(EAGAIN);
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kernel_sleep(10);
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}
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int status = (int)thread->status;
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thread->state = ThreadState::Dying;
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if (status_ptr)
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if (!MemoryManager::copy_to_user_typed(status_ptr, &status)) return err(EFAULT);
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return (u64)pid;
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}
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