remove libc dependency

Cargo.toml

@@ -60,7 +60,6 @@ h2 = "0.1"
 fnv = "1.0.5"
 http = "^0.1.5"
 httparse = "1.2"
-libc = "0.2"
 log = "0.4"
 mime = "0.3"
 mime_guess = "2.0.0-alpha"

src/lib.rs

@@ -107,7 +107,6 @@ extern crate futures_cpupool;
 extern crate http as modhttp;
 extern crate httparse;
 extern crate language_tags;
-extern crate libc;
 extern crate mime;
 extern crate mime_guess;
 extern crate mio;

src/middleware/logger.rs

@@ -3,7 +3,6 @@ use std::collections::HashSet;
 use std::env;
 use std::fmt::{self, Display, Formatter};
 
-use libc;
 use regex::Regex;
 use time;
 
@@ -53,8 +52,6 @@ use middleware::{Finished, Middleware, Started};
 ///
 /// `%t`  Time when the request was started to process
 ///
-/// `%P`  The process ID of the child that serviced the request
-///
 /// `%r`  First line of request
 ///
 /// `%s`  Response status code
@@ -181,7 +178,6 @@ impl Format {
                     "%" => FormatText::Percent,
                     "a" => FormatText::RemoteAddr,
                     "t" => FormatText::RequestTime,
-                    "P" => FormatText::Pid,
                     "r" => FormatText::RequestLine,
                     "s" => FormatText::ResponseStatus,
                     "b" => FormatText::ResponseSize,
@@ -205,7 +201,6 @@ impl Format {
 #[derive(Debug, Clone)]
 pub enum FormatText {
     Str(String),
-    Pid,
     Percent,
     RequestLine,
     RequestTime,
@@ -247,7 +242,6 @@ impl FormatText {
             }
             FormatText::ResponseStatus => resp.status().as_u16().fmt(fmt),
             FormatText::ResponseSize => resp.response_size().fmt(fmt),
-            FormatText::Pid => unsafe { libc::getpid().fmt(fmt) },
             FormatText::Time => {
                 let rt = time::now() - entry_time;
                 let rt = (rt.num_nanoseconds().unwrap_or(0) as f64) / 1_000_000_000.0;