Sends a signal to a child process.
proc_signal() function is used to send a signal to a specific child process identified by its PID. The signal specified by the
sig parameter is sent to the child process, which allows for various forms of inter-process communication and process control.
On POSIX systems, a similar functionality is provided by the
kill() function. It allows sending a signal to a process or a group of processes identified by their process ID. The
kill() function is part of the POSIX standard and is widely supported across different platforms.
;;; Sends a signal to another process (@interface func (export "proc_signal") ;;; ID of the process to send a singal (param $pid $pid) ;;; Signal to send to the thread (param $signal $signal) (result $error (expected (error $errno))) )
ctx: A mutable reference to the function environment.
pid: The PID of the child process to which the signal will be sent.
sig: The signal to send to the child process.
The function returns a
Result indicating the success or failure of the operation. If the operation is successful, it returns
Ok(Errno::Success). Otherwise, it returns an appropriate
This function is instrumented with
trace level logging. It includes the following fields for debugging purposes:
pid: The PID of the child process.
sig: The signal being sent.
proc_signal()function sends a signal to the child process identified by its PID.
- If a process with the specified PID is found, the signal specified by the
sigparameter is sent to that process.
- On POSIX systems, a similar functionality is provided by the
kill()function, which allows sending signals to processes identified by their process ID.
- Sending signals to processes enables inter-process communication and process control. Signals can be used for various purposes, such as terminating a process, handling specific events, or requesting actions from the receiving process.