From 868f414152de3f73b7e6ba5b4b627b95252f2afc Mon Sep 17 00:00:00 2001
From: Meghan Denny <hello@nektro.net>
Date: Sun, 20 Apr 2025 16:43:07 -0700
Subject: [PATCH] add vfork

---
 mod.zig  | 8 +++++++-
 test.zig | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/mod.zig b/mod.zig
index dbdc68abbe550874933c967094c02fbb966ffd41..adf227638c0a0a3688ac5faeccbcf3e96459ea16 100644
--- a/mod.zig
+++ b/mod.zig
@@ -345,7 +345,13 @@ pub fn fork() errno.Error!pid_t {
 // vfork
 // pid_t vfork(void);
 // asmlinkage long sys_vfork(void);
-pub const vfork = @compileError("TODO: vfork");
+pub fn vfork() errno.Error!pid_t {
+    const r = syscall0(.vfork);
+    return switch (_errno(r)) {
+        .ok => @intCast(r),
+        _ => |c| errno.errorFromInt(@intFromEnum(c)),
+    };
+}
 
 // execve
 // int execve(const char *pathname, char *const _Nullable argv[], char *const _Nullable envp[]);
diff --git a/test.zig b/test.zig
index 022f3355d132fff459230dc296eec86ed0520e19..9c78239ffb47f51b2e41fe63fa5fb337489c380d 100644
--- a/test.zig
+++ b/test.zig
@@ -11,4 +11,5 @@ test {
     _ = &linux.pause;
     _ = &linux.getpid;
     _ = &linux.fork;
+    _ = &linux.vfork;
 }
-- 
2.54.0