From 6b3a7b1ce72b894cfa847ca675e90b23dd41737f Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sun, 5 Jul 2020 19:37:43 +0200
Subject: [PATCH] Base: Add man pages for gettid(), getpid(), and getppid()

---
 Base/usr/share/man/man2/getpid.md  | 28 ++++++++++++++++++++++++++++
 Base/usr/share/man/man2/getppid.md | 28 ++++++++++++++++++++++++++++
 Base/usr/share/man/man2/gettid.md  | 28 ++++++++++++++++++++++++++++
 3 files changed, 84 insertions(+)
 create mode 100644 Base/usr/share/man/man2/getpid.md
 create mode 100644 Base/usr/share/man/man2/getppid.md
 create mode 100644 Base/usr/share/man/man2/gettid.md

diff --git a/Base/usr/share/man/man2/getpid.md b/Base/usr/share/man/man2/getpid.md
new file mode 100644
index 0000000000..38ce073022
--- /dev/null
+++ b/Base/usr/share/man/man2/getpid.md
@@ -0,0 +1,28 @@
+## Name
+
+getpid - get current process ID
+
+## Synopsis
+
+```**c++
+#include <unistd.h>
+
+pid_t getpid();
+```
+
+## Description
+
+Returns the PID (process ID) of the calling process.
+
+## Return value
+
+The process ID of the calling process.
+
+## Errors
+
+None.
+
+## See also
+
+* [`getppid`(2)](getppid.md)
+* [`gettid`(2)](gettid.md)
diff --git a/Base/usr/share/man/man2/getppid.md b/Base/usr/share/man/man2/getppid.md
new file mode 100644
index 0000000000..105208c407
--- /dev/null
+++ b/Base/usr/share/man/man2/getppid.md
@@ -0,0 +1,28 @@
+## Name
+
+getppid - get current process's parent process ID
+
+## Synopsis
+
+```**c++
+#include <unistd.h>
+
+pid_t getppid();
+```
+
+## Description
+
+Returns the PID (process ID) of the parent of the calling process.
+
+## Return value
+
+The process ID of the parent of the calling process.
+
+## Errors
+
+None.
+
+## See also
+
+* [`getpid`(2)](getpid.md)
+* [`gettid`(2)](gettid.md)
diff --git a/Base/usr/share/man/man2/gettid.md b/Base/usr/share/man/man2/gettid.md
new file mode 100644
index 0000000000..ed97e509af
--- /dev/null
+++ b/Base/usr/share/man/man2/gettid.md
@@ -0,0 +1,28 @@
+## Name
+
+gettid - get current thread ID
+
+## Synopsis
+
+```**c++
+#include <unistd.h>
+
+int gettid();
+```
+
+## Description
+
+Returns the TID (thread ID) of the calling thread. The first thread in a process has the same TID and PID. Subsequently spawned threads will have unique thread ID's, but all share the same PID.
+
+## Return value
+
+The thread ID of the calling thread.
+
+## Error
+
+None.
+
+## See also
+
+* [`getpid`(2)](getpid.md)
+* [`getppid`(2)](getppid.md)