Auto merge of #2191 - devnexen:macos_libproc_api, r=JohnTitor

apple adding subset of the most used libproc api

Author: bors

libc-test/build.rs

@@ -184,6 +184,7 @@ fn test_apple(target: &str) {
         "iconv.h",
         "ifaddrs.h",
         "langinfo.h",
+        "libproc.h",
         "limits.h",
         "locale.h",
         "mach-o/dyld.h",

libc-test/semver/apple.txt

@@ -1726,6 +1726,10 @@ posix_spawnattr_t
 posix_spawnp
 preadv
 proc_bsdinfo
+proc_name
+proc_pidinfo
+proc_pidfdinfo
+proc_pidpath
 proc_taskallinfo
 proc_taskinfo
 proc_threadinfo

src/unix/bsd/apple/mod.rs

@@ -4049,6 +4049,22 @@ extern "C" {
     // Added in macOS 10.13
     // ISO/IEC 9899:2011 ("ISO C11") K.3.7.4.1
     pub fn memset_s(s: *mut ::c_void, smax: ::size_t, c: ::c_int, n: ::size_t) -> ::c_int;
+    pub fn proc_pidinfo(
+        pid: ::c_int,
+        flavor: ::c_int,
+        arg: u64,
+        buffer: *mut ::c_void,
+        buffersize: ::c_int,
+    ) -> ::c_int;
+    pub fn proc_pidfdinfo(
+        pid: ::c_int,
+        fd: ::c_int,
+        flavor: ::c_int,
+        buffer: *mut ::c_void,
+        buffersize: ::c_int,
+    ) -> ::c_int;
+    pub fn proc_pidpath(pid: ::c_int, buffer: *mut ::c_void, buffersize: u32) -> ::c_int;
+    pub fn proc_name(pid: ::c_int, buffer: *mut ::c_void, buffersize: u32) -> ::c_int;
 }
 
 #[link(name = "iconv")]