feat(linux): add mntent struct and related functions

Useful when playing around with mounting points, sadly not a common
interface

Author: Kelsey Z

libc-test/build.rs

@@ -191,6 +191,7 @@ fn main() {
     }
 
     if linux || emscripten {
+        cfg.header("mntent.h");
         cfg.header("mqueue.h");
         cfg.header("ucontext.h");
         if !uclibc {
@@ -255,7 +256,7 @@ fn main() {
         cfg.header("sys/fsuid.h");
         cfg.header("linux/seccomp.h");
         cfg.header("linux/if_ether.h");
-        
+
         // DCCP support
         if !uclibc && !musl && !emscripten {
             cfg.header("linux/dccp.h");

src/unix/notbsd/linux/mod.rs

@@ -454,6 +454,15 @@ s! {
         pub uid: ::uid_t,
         pub gid: ::gid_t,
     }
+
+    pub struct mntent {
+        pub mnt_fsname: *mut ::c_char,
+        pub mnt_dir: *mut ::c_char,
+        pub mnt_type: *mut ::c_char,
+        pub mnt_opts: *mut ::c_char,
+        pub mnt_freq: ::c_int,
+        pub mnt_passno: ::c_int,
+    }
 }
 
 pub const ABDAY_1: ::nl_item = 0x20000;
@@ -1694,6 +1703,14 @@ extern {
         ) -> ::c_int>,
         data: *mut ::c_void
     ) -> ::c_int;
+
+    pub fn setmntent(filename: *const ::c_char,
+                     ty: *const ::c_char) -> *mut ::FILE;
+    pub fn getmntent(stream: *mut ::FILE) -> *mut ::mntent;
+    pub fn addmntent(stream: *mut ::FILE, mnt: *const ::mntent) -> ::c_int;
+    pub fn endmntent(streamp: *mut ::FILE) -> ::c_int;
+    pub fn hasmntopt(mnt: *const ::mntent,
+                     opt: *const ::c_char) -> *mut ::c_char;
 }
 
 cfg_if! {