From f0cbf63e1ae38d9c13cb07a151567b4890287ae9 Mon Sep 17 00:00:00 2001
From: Luna <git@l4.pm>
Date: Tue, 31 Dec 2019 15:33:23 -0300
Subject: [PATCH] os: use system for memfd_create

 - os: update flags type for memfd_create
---
 lib/std/os.zig       | 11 ++++-------
 lib/std/os/linux.zig |  2 +-
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/lib/std/os.zig b/lib/std/os.zig
index 37043f19bb..31212e9b8b 100644
--- a/lib/std/os.zig
+++ b/lib/std/os.zig
@@ -3282,12 +3282,9 @@ pub fn setsockopt(fd: fd_t, level: u32, optname: u32, opt: []const u8) SetSockOp
     }
 }
 
-// TODO support for non-null terminated strings?
-pub fn memfd_createC(name: [*:0]const u8, flags: usize) !fd_t {
-    if (builtin.os != .linux) @compileError("memfd_create() not implemented for this target");
-
-    const rc = linux.memfd_create(name, flags);
-    switch (linux.getErrno(rc)) {
+pub fn memfd_createC(name: [*:0]const u8, flags: u32) !fd_t {
+    const rc = system.memfd_create(name, flags);
+    switch (errno(rc)) {
         0 => return @intCast(fd_t, rc),
         EFAULT => unreachable, // name has invalid memory
         EINVAL => unreachable, // name/flags are faulty
@@ -3309,7 +3306,7 @@ fn toMemFdPath(name: []const u8) ![MFD_MAX_NAME_LEN:0]u8 {
     return path_with_null;
 }
 
-pub fn memfd_create(name: []const u8, flags: usize) !fd_t {
+pub fn memfd_create(name: []const u8, flags: u32) !fd_t {
     const name_t = try toMemFdPath(name);
     return try memfd_createC(&name_t, flags);
 }
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index 69e5b25f86..b6030fe2fe 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -1110,7 +1110,7 @@ pub fn io_uring_register(fd: i32, opcode: u32, arg: ?*const c_void, nr_args: u32
     return syscall4(SYS_io_uring_register, @bitCast(usize, @as(isize, fd)), opcode, @ptrToInt(arg), nr_args);
 }
 
-pub fn memfd_create(name: [*:0]const u8, flags: usize) usize {
+pub fn memfd_create(name: [*:0]const u8, flags: u32) usize {
     return syscall2(SYS_memfd_create, @ptrToInt(name), flags);
 }