Add constants for memfd_create syscall

libc-test/build.rs

@@ -248,6 +248,10 @@ fn main() {
         if !uclibc && !musl && !emscripten {
             cfg.header("linux/dccp.h");
         }
+
+        if !musl || mips {
+            cfg.header("linux/memfd.h");
+        }
     }
 
     if linux {

src/unix/notbsd/android/mod.rs

@@ -885,6 +885,9 @@ pub const IUTF8: ::tcflag_t = 0x00004000;
 pub const CMSPAR: ::tcflag_t = 0o10000000000;
 pub const O_TMPFILE: ::c_int = 0o20000000 | O_DIRECTORY;
 
+pub const MFD_CLOEXEC: ::c_uint = 0x0001;
+pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+
 f! {
     pub fn CPU_ZERO(cpuset: &mut cpu_set_t) -> () {
         for slot in cpuset.__bits.iter_mut() {

src/unix/notbsd/linux/mips/mod.rs

@@ -667,6 +667,9 @@ pub const AF_MAX: ::c_int = 42;
 #[doc(hidden)]
 pub const PF_MAX: ::c_int = AF_MAX;
 
+pub const MFD_CLOEXEC: ::c_uint = 0x0001;
+pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+
 #[link(name = "util")]
 extern {
     pub fn sysctl(name: *mut ::c_int,

src/unix/notbsd/linux/musl/b32/mips.rs

@@ -771,3 +771,6 @@ pub const SYS_pwritev2: ::c_long = 4000 + 362;
 pub const AF_MAX: ::c_int = 42;
 #[doc(hidden)]
 pub const PF_MAX: ::c_int = AF_MAX;
+
+pub const MFD_CLOEXEC: ::c_uint = 0x0001;
+pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;

src/unix/notbsd/linux/other/mod.rs

@@ -548,6 +548,9 @@ pub const AF_MAX: ::c_int = 42;
 #[doc(hidden)]
 pub const PF_MAX: ::c_int = AF_MAX;
 
+pub const MFD_CLOEXEC: ::c_uint = 0x0001;
+pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+
 cfg_if! {
     if #[cfg(any(target_arch = "arm", target_arch = "x86",
                  target_arch = "x86_64"))] {

src/unix/notbsd/linux/s390x.rs

@@ -1243,6 +1243,9 @@ pub const SYS_setfsuid: ::c_long = 215;
 pub const SYS_setfsgid: ::c_long = 216;
 pub const SYS_newfstatat: ::c_long = 293;
 
+pub const MFD_CLOEXEC: ::c_uint = 0x0001;
+pub const MFD_ALLOW_SEALING: ::c_uint = 0x0002;
+
 #[link(name = "util")]
 extern {
     pub fn sysctl(name: *mut ::c_int,