src/libstd/sys/unix/mod.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![allow(missing_docs, bad_style)]
  12
  13 use io::{self, ErrorKind};
  14 use libc;
  15
  16 #[cfg(any(dox, target_os = "linux"))] pub use os::linux as platform;
  17
  18 #[cfg(all(not(dox), target_os = "android"))]   pub use os::android as platform;
  19 #[cfg(all(not(dox), target_os = "bitrig"))]    pub use os::bitrig as platform;
  20 #[cfg(all(not(dox), target_os = "dragonfly"))] pub use os::dragonfly as platform;
  21 #[cfg(all(not(dox), target_os = "freebsd"))]   pub use os::freebsd as platform;
  22 #[cfg(all(not(dox), target_os = "haiku"))]     pub use os::haiku as platform;
  23 #[cfg(all(not(dox), target_os = "ios"))]       pub use os::ios as platform;
  24 #[cfg(all(not(dox), target_os = "macos"))]     pub use os::macos as platform;
  25 #[cfg(all(not(dox), target_os = "netbsd"))]    pub use os::netbsd as platform;
  26 #[cfg(all(not(dox), target_os = "openbsd"))]   pub use os::openbsd as platform;
  27 #[cfg(all(not(dox), target_os = "solaris"))]   pub use os::solaris as platform;
  28 #[cfg(all(not(dox), target_os = "emscripten"))] pub use os::emscripten as platform;
  29 #[cfg(all(not(dox), target_os = "fuchsia"))]   pub use os::fuchsia as platform;
  30 #[cfg(all(not(dox), target_os = "l4re"))]      pub use os::linux as platform;
  31
  32 pub use self::rand::hashmap_random_keys;
  33 pub use libc::strlen;
  34
  35 #[macro_use]
  36 pub mod weak;
  37
  38 pub mod args;
  39 pub mod android;
  40 #[cfg(feature = "backtrace")]
  41 pub mod backtrace;
  42 pub mod cmath;
  43 pub mod condvar;
  44 pub mod env;
  45 pub mod ext;
  46 pub mod fast_thread_local;
  47 pub mod fd;
  48 pub mod fs;
  49 pub mod memchr;
  50 pub mod mutex;
  51 #[cfg(not(target_os = "l4re"))]
  52 pub mod net;
  53 #[cfg(target_os = "l4re")]
  54 mod l4re;
  55 #[cfg(target_os = "l4re")]
  56 pub use self::l4re::net;
  57 pub mod os;
  58 pub mod os_str;
  59 pub mod path;
  60 pub mod pipe;
  61 pub mod process;
  62 pub mod rand;
  63 pub mod rwlock;
  64 pub mod stack_overflow;
  65 pub mod thread;
  66 pub mod thread_local;
  67 pub mod time;
  68 pub mod stdio;
  69
  70 #[cfg(not(test))]
  71 pub fn init() {
  72     // By default, some platforms will send a *signal* when an EPIPE error
  73     // would otherwise be delivered. This runtime doesn't install a SIGPIPE
  74     // handler, causing it to kill the program, which isn't exactly what we
  75     // want!
  76     //
  77     // Hence, we set SIGPIPE to ignore when the program starts up in order
  78     // to prevent this problem.
  79     unsafe {
  80         reset_sigpipe();
  81     }
  82
  83     #[cfg(not(any(target_os = "emscripten", target_os="fuchsia")))]
  84     unsafe fn reset_sigpipe() {
  85         assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != libc::SIG_ERR);
  86     }
  87     #[cfg(any(target_os = "emscripten", target_os="fuchsia"))]
  88     unsafe fn reset_sigpipe() {}
  89 }
  90
  91 #[cfg(target_os = "android")]
  92 pub use sys::android::signal;
  93 #[cfg(not(target_os = "android"))]
  94 pub use libc::signal;
  95
  96 pub fn decode_error_kind(errno: i32) -> ErrorKind {
  97     match errno as libc::c_int {
  98         libc::ECONNREFUSED => ErrorKind::ConnectionRefused,
  99         libc::ECONNRESET => ErrorKind::ConnectionReset,
 100         libc::EPERM | libc::EACCES => ErrorKind::PermissionDenied,
 101         libc::EPIPE => ErrorKind::BrokenPipe,
 102         libc::ENOTCONN => ErrorKind::NotConnected,
 103         libc::ECONNABORTED => ErrorKind::ConnectionAborted,
 104         libc::EADDRNOTAVAIL => ErrorKind::AddrNotAvailable,
 105         libc::EADDRINUSE => ErrorKind::AddrInUse,
 106         libc::ENOENT => ErrorKind::NotFound,
 107         libc::EINTR => ErrorKind::Interrupted,
 108         libc::EINVAL => ErrorKind::InvalidInput,
 109         libc::ETIMEDOUT => ErrorKind::TimedOut,
 110         libc::EEXIST => ErrorKind::AlreadyExists,
 111
 112         // These two constants can have the same value on some systems,
 113         // but different values on others, so we can't use a match
 114         // clause
 115         x if x == libc::EAGAIN || x == libc::EWOULDBLOCK =>
 116             ErrorKind::WouldBlock,
 117
 118         _ => ErrorKind::Other,
 119     }
 120 }
 121
 122 #[doc(hidden)]
 123 pub trait IsMinusOne {
 124     fn is_minus_one(&self) -> bool;
 125 }
 126
 127 macro_rules! impl_is_minus_one {
 128     ($($t:ident)*) => ($(impl IsMinusOne for $t {
 129         fn is_minus_one(&self) -> bool {
 130             *self == -1
 131         }
 132     })*)
 133 }
 134
 135 impl_is_minus_one! { i8 i16 i32 i64 isize }
 136
 137 pub fn cvt<T: IsMinusOne>(t: T) -> io::Result<T> {
 138     if t.is_minus_one() {
 139         Err(io::Error::last_os_error())
 140     } else {
 141         Ok(t)
 142     }
 143 }
 144
 145 pub fn cvt_r<T, F>(mut f: F) -> io::Result<T>
 146     where T: IsMinusOne,
 147           F: FnMut() -> T
 148 {
 149     loop {
 150         match cvt(f()) {
 151             Err(ref e) if e.kind() == ErrorKind::Interrupted => {}
 152             other => return other,
 153         }
 154     }
 155 }
 156
 157 // On Unix-like platforms, libc::abort will unregister signal handlers
 158 // including the SIGABRT handler, preventing the abort from being blocked, and
 159 // fclose streams, with the side effect of flushing them so libc bufferred
 160 // output will be printed.  Additionally the shell will generally print a more
 161 // understandable error message like "Abort trap" rather than "Illegal
 162 // instruction" that intrinsics::abort would cause, as intrinsics::abort is
 163 // implemented as an illegal instruction.
 164 pub unsafe fn abort_internal() -> ! {
 165     ::libc::abort()
 166 }