Linux: add getitimer()/setitimer()

libc-test/semver/linux.txt

@@ -3475,6 +3475,8 @@ __c_anonymous_sockaddr_can_j1939
 __c_anonymous_sockaddr_can_tp
 __errno_location
 __exit_status
+__itimer_which
+__itimer_which_t
 __s16
 __s32
 __u16
@@ -3591,6 +3593,7 @@ getgrnam_r
 getgrouplist
 gethostid
 getifaddrs
+getitimer
 getline
 getmntent
 getnameinfo
@@ -3892,6 +3895,7 @@ setfsuid
 setgrent
 setgroups
 sethostname
+setitimer
 setmntent
 setns
 setpriority

src/unix/linux_like/linux/mod.rs

@@ -73,12 +73,31 @@ missing! {
     pub enum fpos64_t {} // FIXME: fill this out with a struct
 }
 
+cfg_if! {
+    if #[cfg(target_env = "gnu")] {
+        pub type __itimer_which_t = ::__itimer_which;
+    }
+}
+
+cfg_if! {
+    if #[cfg(not(target_env = "gnu"))] {
+        pub type __itimer_which_t = ::c_int;
+    }
+}
+
 e! {
     pub enum tpacket_versions {
         TPACKET_V1,
         TPACKET_V2,
         TPACKET_V3,
     }
+
+    #[repr(i32)]
+    pub enum __itimer_which {
+        ITIMER_REAL = 0,
+        ITIMER_VIRTUAL = 1,
+        ITIMER_PROF = 2,
+    }
 }
 
 s! {
@@ -6127,6 +6146,13 @@ extern "C" {
     pub fn klogctl(syslog_type: ::c_int, bufp: *mut ::c_char, len: ::c_int) -> ::c_int;
 
     pub fn ioctl(fd: ::c_int, request: ::Ioctl, ...) -> ::c_int;
+
+    pub fn getitimer(which: ::__itimer_which_t, value: *mut ::itimerval) -> ::c_int;
+    pub fn setitimer(
+        which: ::__itimer_which_t,
+        new: *const ::itimerval,
+        old: *mut ::itimerval,
+    ) -> ::c_int;
 }
 
 // LFS64 extensions