diff options
Diffstat (limited to 'src/sys/wait.rs')
| -rw-r--r-- | src/sys/wait.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/sys/wait.rs b/src/sys/wait.rs index 6c5c0f0e..ee49e37d 100644 --- a/src/sys/wait.rs +++ b/src/sys/wait.rs @@ -1,3 +1,4 @@ +//! Wait for a process to change status use crate::errno::Errno; use crate::sys::signal::Signal; use crate::unistd::Pid; @@ -7,9 +8,17 @@ use libc::{self, c_int}; use std::convert::TryFrom; libc_bitflags!( + /// Controls the behavior of [`waitpid`]. pub struct WaitPidFlag: c_int { + /// Do not block when there are no processes wishing to report status. WNOHANG; + /// Report the status of selected processes which are stopped due to a + /// [`SIGTTIN`](crate::sys::signal::Signal::SIGTTIN), + /// [`SIGTTOU`](crate::sys::signal::Signal::SIGTTOU), + /// [`SIGTSTP`](crate::sys::signal::Signal::SIGTSTP), or + /// [`SIGSTOP`](crate::sys::signal::Signal::SIGSTOP) signal. WUNTRACED; + /// Report the status of selected processes which have terminated. #[cfg(any(target_os = "android", target_os = "freebsd", target_os = "haiku", @@ -19,7 +28,11 @@ libc_bitflags!( target_os = "macos", target_os = "netbsd"))] WEXITED; + /// Report the status of selected processes that have continued from a + /// job control stop by receiving a + /// [`SIGCONT`](crate::sys::signal::Signal::SIGCONT) signal. WCONTINUED; + /// An alias for WUNTRACED. #[cfg(any(target_os = "android", target_os = "freebsd", target_os = "haiku", @@ -45,6 +58,7 @@ libc_bitflags!( /// Wait on all children, regardless of type #[cfg(any(target_os = "android", target_os = "linux", target_os = "redox"))] __WALL; + /// Wait for "clone" children only. #[cfg(any(target_os = "android", target_os = "linux", target_os = "redox"))] __WCLONE; } @@ -213,6 +227,9 @@ impl WaitStatus { } } +/// Wait for a process to change status +/// +/// See also [waitpid(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/waitpid.html) pub fn waitpid<P: Into<Option<Pid>>>(pid: P, options: Option<WaitPidFlag>) -> Result<WaitStatus> { use self::WaitStatus::*; @@ -237,6 +254,9 @@ pub fn waitpid<P: Into<Option<Pid>>>(pid: P, options: Option<WaitPidFlag>) -> Re } } +/// Wait for any child process to change status or a signal is received. +/// +/// See also [wait(2)](https://pubs.opengroup.org/onlinepubs/9699919799/functions/wait.html) pub fn wait() -> Result<WaitStatus> { waitpid(None, None) } |