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impl FromStr for sys::Signal #884

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merged 1 commit into from Sep 5, 2018
Merged

impl FromStr for sys::Signal #884

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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -31,6 +31,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
([#857](https://github.com/nix-rust/nix/pull/857))
- Added `request_code_write_int!` on FreeBSD/DragonFlyBSD
([#833](https://github.com/nix-rust/nix/pull/833))
- Added `FromStr` and `Display` impls for `nix::sys::Signal`
([#884](https://github.com/nix-rust/nix/pull/884))

### Changed
- Display and Debug for SysControlAddr now includes all fields.
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116 changes: 116 additions & 0 deletions src/sys/signal.rs
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Expand Up @@ -5,6 +5,8 @@ use libc;
use {Error, Result};
use errno::Errno;
use std::mem;
use std::fmt;
use std::str::FromStr;
#[cfg(any(target_os = "dragonfly", target_os = "freebsd"))]
use std::os::unix::io::RawFd;
use std::ptr;
Expand Down Expand Up @@ -60,6 +62,104 @@ libc_enum!{
}
}

impl FromStr for Signal {
type Err = Error;
fn from_str(s: &str) -> Result<Signal> {
Ok(match s {
"SIGHUP" => Signal::SIGHUP,
"SIGINT" => Signal::SIGINT,
"SIGQUIT" => Signal::SIGQUIT,
"SIGILL" => Signal::SIGILL,
"SIGTRAP" => Signal::SIGTRAP,
"SIGABRT" => Signal::SIGABRT,
"SIGBUS" => Signal::SIGBUS,
"SIGFPE" => Signal::SIGFPE,
"SIGKILL" => Signal::SIGKILL,
"SIGUSR1" => Signal::SIGUSR1,
"SIGSEGV" => Signal::SIGSEGV,
"SIGUSR2" => Signal::SIGUSR2,
"SIGPIPE" => Signal::SIGPIPE,
"SIGALRM" => Signal::SIGALRM,
"SIGTERM" => Signal::SIGTERM,
#[cfg(all(any(target_os = "android", target_os = "emscripten", target_os = "linux"),
not(any(target_arch = "mips", target_arch = "mips64"))))]
"SIGSTKFLT" => Signal::SIGSTKFLT,
"SIGCHLD" => Signal::SIGCHLD,
"SIGCONT" => Signal::SIGCONT,
"SIGSTOP" => Signal::SIGSTOP,
"SIGTSTP" => Signal::SIGTSTP,
"SIGTTIN" => Signal::SIGTTIN,
"SIGTTOU" => Signal::SIGTTOU,
"SIGURG" => Signal::SIGURG,
"SIGXCPU" => Signal::SIGXCPU,
"SIGXFSZ" => Signal::SIGXFSZ,
"SIGVTALRM" => Signal::SIGVTALRM,
"SIGPROF" => Signal::SIGPROF,
"SIGWINCH" => Signal::SIGWINCH,
"SIGIO" => Signal::SIGIO,
#[cfg(any(target_os = "android", target_os = "emscripten", target_os = "linux"))]
"SIGPWR" => Signal::SIGPWR,
"SIGSYS" => Signal::SIGSYS,
#[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "linux")))]
"SIGEMT" => Signal::SIGEMT,
#[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "linux")))]
"SIGINFO" => Signal::SIGINFO,
_ => return Err(Error::invalid_argument()),
})
}
}

impl AsRef<str> for Signal {
fn as_ref(&self) -> &str {
match *self {
Signal::SIGHUP => "SIGHUP",
Signal::SIGINT => "SIGINT",
Signal::SIGQUIT => "SIGQUIT",
Signal::SIGILL => "SIGILL",
Signal::SIGTRAP => "SIGTRAP",
Signal::SIGABRT => "SIGABRT",
Signal::SIGBUS => "SIGBUS",
Signal::SIGFPE => "SIGFPE",
Signal::SIGKILL => "SIGKILL",
Signal::SIGUSR1 => "SIGUSR1",
Signal::SIGSEGV => "SIGSEGV",
Signal::SIGUSR2 => "SIGUSR2",
Signal::SIGPIPE => "SIGPIPE",
Signal::SIGALRM => "SIGALRM",
Signal::SIGTERM => "SIGTERM",
#[cfg(all(any(target_os = "android", target_os = "emscripten", target_os = "linux"),
not(any(target_arch = "mips", target_arch = "mips64"))))]
Signal::SIGSTKFLT => "SIGSTKFLT",
Signal::SIGCHLD => "SIGCHLD",
Signal::SIGCONT => "SIGCONT",
Signal::SIGSTOP => "SIGSTOP",
Signal::SIGTSTP => "SIGTSTP",
Signal::SIGTTIN => "SIGTTIN",
Signal::SIGTTOU => "SIGTTOU",
Signal::SIGURG => "SIGURG",
Signal::SIGXCPU => "SIGXCPU",
Signal::SIGXFSZ => "SIGXFSZ",
Signal::SIGVTALRM => "SIGVTALRM",
Signal::SIGPROF => "SIGPROF",
Signal::SIGWINCH => "SIGWINCH",
Signal::SIGIO => "SIGIO",
#[cfg(any(target_os = "android", target_os = "emscripten", target_os = "linux"))]
Signal::SIGPWR => "SIGPWR",
Signal::SIGSYS => "SIGSYS",
#[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "linux")))]
Signal::SIGEMT => "SIGEMT",
#[cfg(not(any(target_os = "android", target_os = "emscripten", target_os = "linux")))]
Signal::SIGINFO => "SIGINFO",
}
}
}

impl fmt::Display for Signal {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(self.as_ref())
}
}

pub use self::Signal::*;

#[cfg(all(any(target_os = "linux", target_os = "android", target_os = "emscripten"), not(any(target_arch = "mips", target_arch = "mips64"))))]
Expand Down Expand Up @@ -658,6 +758,22 @@ mod tests {
}
}

#[test]
fn test_from_str_round_trips() {
for signal in Signal::iterator() {
assert_eq!(signal.as_ref().parse::<Signal>().unwrap(), signal);
assert_eq!(signal.to_string().parse::<Signal>().unwrap(), signal);
}
}

#[test]
fn test_from_str_invalid_value() {
let errval = Err(Error::Sys(Errno::EINVAL));
assert_eq!("NOSIGNAL".parse::<Signal>(), errval);
assert_eq!("kill".parse::<Signal>(), errval);
assert_eq!("9".parse::<Signal>(), errval);
}

#[test]
fn test_extend() {
let mut one_signal = SigSet::empty();
Expand Down