From 4c2443935160b023dc181890a2a057b06942c67b Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sun, 20 Apr 2025 16:42:42 -0700
Subject: [PATCH] add getpid

---
 mod.zig  | 9 ++++++++-
 test.zig | 1 +
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/mod.zig b/mod.zig
index 8f0edaf10462073fd032a33f61633ecc5a507eb8..90588bae432312a7d8cdc6b7a47c714c007043b0 100644
--- a/mod.zig
+++ b/mod.zig
@@ -8,6 +8,7 @@ const syscall3 = sys.syscall3;
 const syscall4 = sys.syscall4;
 const syscall5 = sys.syscall5;
 const syscall6 = sys.syscall6;
+const pid_t = sys.pid_t;
 
 fn _errno(rc: usize) enum(c_ushort) { ok, _ } {
     const signed: isize = @bitCast(rc);
@@ -237,7 +238,13 @@ pub const setitimer = @compileError("TODO: setitimer");
 // getpid
 // pid_t getpid(void);
 // asmlinkage long sys_getpid(void);
-pub const getpid = @compileError("TODO: getpid");
+pub fn getpid() errno.Error!pid_t {
+    const r = syscall0(.getpid);
+    return switch (_errno(r)) {
+        .ok => @intCast(r),
+        _ => |c| errno.errorFromInt(@intFromEnum(c)),
+    };
+}
 
 // sendfile
 // ssize_t sendfile(int out_fd, int in_fd, off_t *_Nullable offset, size_t count);
diff --git a/test.zig b/test.zig
index 0c56a714a1ce33f5d622e9250da5ee185cc70f54..4ac00678f4935b29ac72f40847dd9b65a81e78fd 100644
--- a/test.zig
+++ b/test.zig
@@ -9,4 +9,5 @@ test {
     _ = &linux.write;
     _ = &linux.sched_yield;
     _ = &linux.pause;
+    _ = &linux.getpid;
 }
-- 
2.54.0