src/libstd/sys/unix/mod.rs

   1 #![allow(missing_docs, nonstandard_style)]
   2
   3 use crate::io::ErrorKind;
   4
   5 #[cfg(any(doc, target_os = "linux"))]
   6 pub use crate::os::linux as platform;
   7
   8 #[cfg(all(not(doc), target_os = "android"))]
   9 pub use crate::os::android as platform;
  10 #[cfg(all(not(doc), target_os = "dragonfly"))]
  11 pub use crate::os::dragonfly as platform;
  12 #[cfg(all(not(doc), target_os = "emscripten"))]
  13 pub use crate::os::emscripten as platform;
  14 #[cfg(all(not(doc), target_os = "freebsd"))]
  15 pub use crate::os::freebsd as platform;
  16 #[cfg(all(not(doc), target_os = "fuchsia"))]
  17 pub use crate::os::fuchsia as platform;
  18 #[cfg(all(not(doc), target_os = "haiku"))]
  19 pub use crate::os::haiku as platform;
  20 #[cfg(all(not(doc), target_os = "illumos"))]
  21 pub use crate::os::illumos as platform;
  22 #[cfg(all(not(doc), target_os = "ios"))]
  23 pub use crate::os::ios as platform;
  24 #[cfg(all(not(doc), target_os = "l4re"))]
  25 pub use crate::os::linux as platform;
  26 #[cfg(all(not(doc), target_os = "macos"))]
  27 pub use crate::os::macos as platform;
  28 #[cfg(all(not(doc), target_os = "netbsd"))]
  29 pub use crate::os::netbsd as platform;
  30 #[cfg(all(not(doc), target_os = "openbsd"))]
  31 pub use crate::os::openbsd as platform;
  32 #[cfg(all(not(doc), target_os = "redox"))]
  33 pub use crate::os::redox as platform;
  34 #[cfg(all(not(doc), target_os = "solaris"))]
  35 pub use crate::os::solaris as platform;
  36
  37 pub use self::rand::hashmap_random_keys;
  38 pub use libc::strlen;
  39
  40 #[macro_use]
  41 pub mod weak;
  42
  43 pub mod alloc;
  44 pub mod android;
  45 pub mod args;
  46 pub mod cmath;
  47 pub mod condvar;
  48 pub mod env;
  49 pub mod ext;
  50 pub mod fast_thread_local;
  51 pub mod fd;
  52 pub mod fs;
  53 pub mod io;
  54 #[cfg(target_os = "l4re")]
  55 mod l4re;
  56 pub mod memchr;
  57 pub mod mutex;
  58 #[cfg(not(target_os = "l4re"))]
  59 pub mod net;
  60 #[cfg(target_os = "l4re")]
  61 pub use self::l4re::net;
  62 pub mod os;
  63 pub mod path;
  64 pub mod pipe;
  65 pub mod process;
  66 pub mod rand;
  67 pub mod rwlock;
  68 pub mod stack_overflow;
  69 pub mod stdio;
  70 pub mod thread;
  71 pub mod thread_local;
  72 pub mod time;
  73
  74 pub use crate::sys_common::os_str_bytes as os_str;
  75
  76 #[cfg(not(test))]
  77 pub fn init() {
  78     // By default, some platforms will send a *signal* when an EPIPE error
  79     // would otherwise be delivered. This runtime doesn't install a SIGPIPE
  80     // handler, causing it to kill the program, which isn't exactly what we
  81     // want!
  82     //
  83     // Hence, we set SIGPIPE to ignore when the program starts up in order
  84     // to prevent this problem.
  85     unsafe {
  86         reset_sigpipe();
  87     }
  88
  89     #[cfg(not(any(target_os = "emscripten", target_os = "fuchsia")))]
  90     unsafe fn reset_sigpipe() {
  91         assert!(signal(libc::SIGPIPE, libc::SIG_IGN) != libc::SIG_ERR);
  92     }
  93     #[cfg(any(target_os = "emscripten", target_os = "fuchsia"))]
  94     unsafe fn reset_sigpipe() {}
  95 }
  96
  97 #[cfg(target_os = "android")]
  98 pub use crate::sys::android::signal;
  99 #[cfg(not(target_os = "android"))]
 100 pub use libc::signal;
 101
 102 pub fn decode_error_kind(errno: i32) -> ErrorKind {
 103     match errno as libc::c_int {
 104         libc::ECONNREFUSED => ErrorKind::ConnectionRefused,
 105         libc::ECONNRESET => ErrorKind::ConnectionReset,
 106         libc::EPERM | libc::EACCES => ErrorKind::PermissionDenied,
 107         libc::EPIPE => ErrorKind::BrokenPipe,
 108         libc::ENOTCONN => ErrorKind::NotConnected,
 109         libc::ECONNABORTED => ErrorKind::ConnectionAborted,
 110         libc::EADDRNOTAVAIL => ErrorKind::AddrNotAvailable,
 111         libc::EADDRINUSE => ErrorKind::AddrInUse,
 112         libc::ENOENT => ErrorKind::NotFound,
 113         libc::EINTR => ErrorKind::Interrupted,
 114         libc::EINVAL => ErrorKind::InvalidInput,
 115         libc::ETIMEDOUT => ErrorKind::TimedOut,
 116         libc::EEXIST => ErrorKind::AlreadyExists,
 117
 118         // These two constants can have the same value on some systems,
 119         // but different values on others, so we can't use a match
 120         // clause
 121         x if x == libc::EAGAIN || x == libc::EWOULDBLOCK => ErrorKind::WouldBlock,
 122
 123         _ => ErrorKind::Other,
 124     }
 125 }
 126
 127 #[doc(hidden)]
 128 pub trait IsMinusOne {
 129     fn is_minus_one(&self) -> bool;
 130 }
 131
 132 macro_rules! impl_is_minus_one {
 133     ($($t:ident)*) => ($(impl IsMinusOne for $t {
 134         fn is_minus_one(&self) -> bool {
 135             *self == -1
 136         }
 137     })*)
 138 }
 139
 140 impl_is_minus_one! { i8 i16 i32 i64 isize }
 141
 142 pub fn cvt<T: IsMinusOne>(t: T) -> crate::io::Result<T> {
 143     if t.is_minus_one() { Err(crate::io::Error::last_os_error()) } else { Ok(t) }
 144 }
 145
 146 pub fn cvt_r<T, F>(mut f: F) -> crate::io::Result<T>
 147 where
 148     T: IsMinusOne,
 149     F: FnMut() -> T,
 150 {
 151     loop {
 152         match cvt(f()) {
 153             Err(ref e) if e.kind() == ErrorKind::Interrupted => {}
 154             other => return other,
 155         }
 156     }
 157 }
 158
 159 // On Unix-like platforms, libc::abort will unregister signal handlers
 160 // including the SIGABRT handler, preventing the abort from being blocked, and
 161 // fclose streams, with the side effect of flushing them so libc buffered
 162 // output will be printed.  Additionally the shell will generally print a more
 163 // understandable error message like "Abort trap" rather than "Illegal
 164 // instruction" that intrinsics::abort would cause, as intrinsics::abort is
 165 // implemented as an illegal instruction.
 166 pub unsafe fn abort_internal() -> ! {
 167     libc::abort()
 168 }