os: fix missing and incorrect msghdr definitions

Macos uses the BSD definition of msghdr

All linux architectures share a single msghdr definition. Many
architectures had manually inserted padding fields that were endian
specific and some had fields with different integers. This unifies all
architectures to use a single correct msghdr definition.

lib/std/os/linux.zig

@@ -103,8 +103,6 @@ pub const dev_t = arch_bits.dev_t;
 pub const ino_t = arch_bits.ino_t;
 pub const mcontext_t = arch_bits.mcontext_t;
 pub const mode_t = arch_bits.mode_t;
-pub const msghdr = arch_bits.msghdr;
-pub const msghdr_const = arch_bits.msghdr_const;
 pub const nlink_t = arch_bits.nlink_t;
 pub const off_t = arch_bits.off_t;
 pub const time_t = arch_bits.time_t;
@@ -9403,3 +9401,23 @@ pub const SHADOW_STACK = struct {
     /// Set up a restore token in the shadow stack.
     pub const SET_TOKEN: u64 = 1 << 0;
 };
+
+pub const msghdr = extern struct {
+    name: ?*sockaddr,
+    namelen: socklen_t,
+    iov: [*]iovec,
+    iovlen: usize,
+    control: ?*anyopaque,
+    controllen: usize,
+    flags: u32,
+};
+
+pub const msghdr_const = extern struct {
+    name: ?*const sockaddr,
+    namelen: socklen_t,
+    iov: [*]const iovec_const,
+    iovlen: usize,
+    control: ?*const anyopaque,
+    controllen: usize,
+    flags: u32,
+};

lib/std/os/linux/aarch64.zig

@@ -199,30 +199,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
 pub const blksize_t = i32;
 pub const nlink_t = u32;
 pub const time_t = isize;

lib/std/os/linux/arm.zig

@@ -237,26 +237,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
 pub const blksize_t = i32;
 pub const nlink_t = u32;
 pub const time_t = isize;

lib/std/os/linux/mips.zig

@@ -309,26 +309,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
 pub const blksize_t = u32;
 pub const nlink_t = u32;
 pub const time_t = i32;

lib/std/os/linux/mips64.zig

@@ -288,26 +288,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
 pub const blksize_t = u32;
 pub const nlink_t = u32;
 pub const time_t = i32;

lib/std/os/linux/powerpc.zig

@@ -247,26 +247,6 @@ pub const Flock = extern struct {
     pid: pid_t,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: usize,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: usize,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
 pub const blksize_t = i32;
 pub const nlink_t = u32;
 pub const time_t = isize;

lib/std/os/linux/powerpc64.zig

@@ -233,26 +233,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: usize,
-    control: ?*anyopaque,
-    controllen: usize,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: usize,
-    control: ?*const anyopaque,
-    controllen: usize,
-    flags: i32,
-};
-
 pub const blksize_t = i64;
 pub const nlink_t = u64;
 pub const time_t = i64;

lib/std/os/linux/riscv32.zig

@@ -200,30 +200,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
 // The `stat` definition used by the Linux kernel.
 pub const Stat = extern struct {
     dev: dev_t,

lib/std/os/linux/riscv64.zig

@@ -200,30 +200,6 @@ pub const Flock = extern struct {
     __unused: [4]u8,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
 // The `stat` definition used by the Linux kernel.
 pub const Stat = extern struct {
     dev: dev_t,

lib/std/os/linux/sparc64.zig

@@ -282,26 +282,6 @@ pub const Flock = extern struct {
     pid: pid_t,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: u64,
-    control: ?*anyopaque,
-    controllen: u64,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: u64,
-    control: ?*const anyopaque,
-    controllen: u64,
-    flags: i32,
-};
-
 pub const off_t = i64;
 pub const ino_t = u64;
 pub const time_t = isize;

lib/std/os/linux/x86.zig

@@ -245,26 +245,6 @@ pub const Flock = extern struct {
     pid: pid_t,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    flags: i32,
-};
-
 pub const blksize_t = i32;
 pub const nlink_t = u32;
 pub const time_t = isize;

lib/std/os/linux/x86_64.zig

@@ -233,30 +233,6 @@ pub const Flock = extern struct {
     pid: pid_t,
 };
 
-pub const msghdr = extern struct {
-    name: ?*sockaddr,
-    namelen: socklen_t,
-    iov: [*]iovec,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
-pub const msghdr_const = extern struct {
-    name: ?*const sockaddr,
-    namelen: socklen_t,
-    iov: [*]const iovec_const,
-    iovlen: i32,
-    __pad1: i32 = 0,
-    control: ?*const anyopaque,
-    controllen: socklen_t,
-    __pad2: socklen_t = 0,
-    flags: i32,
-};
-
 pub const off_t = i64;
 pub const ino_t = u64;
 pub const dev_t = u64;