From 979fd12be96d5f8eda3e02ba676aecea78e6c0db Mon Sep 17 00:00:00 2001
From: "Jeffrey C. Ollie" <jcollie@dmacc.edu>
Date: Mon, 29 Jul 2024 13:07:19 -0500
Subject: Add getppid to std.c and std.os.linux.

The std lib is missing getppid, this patch adds it.
---
 lib/std/c.zig             | 1 +
 lib/std/os/linux.zig      | 4 ++++
 lib/std/os/linux/test.zig | 4 ++++
 3 files changed, 9 insertions(+)

(limited to 'lib')

diff --git a/lib/std/c.zig b/lib/std/c.zig
index f6398720bf..67da8ba5d1 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -9351,6 +9351,7 @@ pub extern "c" fn setlogmask(maskpri: c_int) c_int;
 pub extern "c" fn if_nametoindex([*:0]const u8) c_int;
 
 pub extern "c" fn getpid() pid_t;
+pub extern "c" fn getppid() pid_t;
 
 /// These are implementation defined but share identical values in at least musl and glibc:
 /// - https://git.musl-libc.org/cgit/musl/tree/include/locale.h?id=ab31e9d6a0fa7c5c408856c89df2dfb12c344039#n18
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 35b20c9fa0..a5a82c2e32 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -1614,6 +1614,10 @@ pub fn getpid() pid_t {
     return @bitCast(@as(u32, @truncate(syscall0(.getpid))));
 }
 
+pub fn getppid() pid_t {
+    return @bitCast(@as(u32, @truncate(syscall0(.getppid))));
+}
+
 pub fn gettid() pid_t {
     return @bitCast(@as(u32, @truncate(syscall0(.gettid))));
 }
diff --git a/lib/std/os/linux/test.zig b/lib/std/os/linux/test.zig
index b3c02803f3..8562d4be8e 100644
--- a/lib/std/os/linux/test.zig
+++ b/lib/std/os/linux/test.zig
@@ -32,6 +32,10 @@ test "getpid" {
     try expect(linux.getpid() != 0);
 }
 
+test "getppid" {
+    try expect(linux.getppid() != 0);
+}
+
 test "timer" {
     const epoll_fd = linux.epoll_create();
     var err: linux.E = linux.E.init(epoll_fd);
-- 
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