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Kernel+LibC: Add sys$waitid(), and make sys$waitpid() wrap it

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sys$waitid() takes an explicit description of whether it's waiting for a single
process with the given PID, all of the children, a group, etc., and returns its
info as a siginfo_t.

It also doesn't automatically imply WEXITED, which clears up the confusion in
the kernel.
This commit is contained in:
Sergey Bugaev
2020-02-05 19:42:43 +03:00
committed by Andreas Kling
parent a6cb7f759e
commit b3a24d732d
5 changed files with 140 additions and 55 deletions
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6
Kernel/Process.h
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@@ -201,7 +201,7 @@ public:
int sys$kill(pid_t pid, int sig);
[[noreturn]] void sys$exit(int status);
int sys$sigreturn(RegisterDump& registers);
pid_t sys$waitpid(pid_t, int* wstatus, int options);
pid_t sys$waitid(const Syscall::SC_waitid_params*);
void* sys$mmap(const Syscall::SC_mmap_params*);
int sys$munmap(void*, size_t size);
int sys$set_mmap_name(const Syscall::SC_set_mmap_name_params*);
@@ -310,7 +310,7 @@ public:
static void initialize();
[[noreturn]] void crash(int signal, u32 eip);
[[nodiscard]] static int reap(Process&);
[[nodiscard]] static siginfo_t reap(Process&);
const TTY* tty() const { return m_tty; }
void set_tty(TTY* tty) { m_tty = tty; }
@@ -430,6 +430,8 @@ private:
KResult do_kill(Process&, int signal);
KResult do_killpg(pid_t pgrp, int signal);
KResultOr<siginfo_t> do_waitid(idtype_t idtype, int id, int options);
KResultOr<String> get_syscall_path_argument(const char* user_path, size_t path_length) const;
KResultOr<String> get_syscall_path_argument(const Syscall::StringArgument&) const;