View Source Stdio.Syscall behaviour (stdio v0.4.4)
System call portability for operating systems.
Summary
Callbacks
Operations required to disable setuid.
Path to procfs file system
Terminate descendents of a supervisor process.
Terminate a process subtree (descendents of a child process) of the supervisor.
Operations required to terminate a process if the parent exits.
Set the process title.
Fork a subprocess.
Set process as init(1) for descendent processes.
Functions
The default implementation for disable_setuid/0
Get the syscall implementation for this platform.
Terminate descendents of a supervisor process.
Terminate descendents of a process.
The default implementation for set_pdeathsig/0
The default implementation for setproctitle/2
The default implementation for subprocess/1
The default implementation for subreaper/1
Callbacks
@callback disable_setuid() :: [Stdio.Op.t()]
Operations required to disable setuid.
@callback procfs() :: String.t()
Path to procfs file system
@callback reap(Stdio.ProcessTree.t(), atom()) :: :ok | {:error, :prx.posix()}
Terminate descendents of a supervisor process.
@callback reap(Stdio.ProcessTree.t(), :prx.pid_t(), atom()) :: :ok | {:error, :prx.posix()}
Terminate a process subtree (descendents of a child process) of the supervisor.
@callback set_pdeathsig() :: [Stdio.Op.t()]
Operations required to terminate a process if the parent exits.
@callback setproctitle(:prx.task(), String.t()) :: :ok | {:error, :prx.posix()}
Set the process title.
@callback subprocess(Keyword.t()) :: (:prx.task() -> {:ok, [Stdio.ProcessTree.t()]} | {:error, :prx.posix()})
Fork a subprocess.
@callback subreaper(:prx.task()) :: :ok | {:error, :prx.posix()}
Set process as init(1) for descendent processes.
Functions
The default implementation for disable_setuid/0
Disabling the ability for the process to escalate privileges is not available on this platform.
@spec os() :: module()
Get the syscall implementation for this platform.
The default implementation is based on the operating system.
Set the implementation by configuring the application environment:
import Config
config :stdio, :syscall, Stdio.Syscall.LinuxThe default implementation for procfs/0
Terminate descendents of a supervisor process.
Terminate descendents of a process.
Signals the process group for each child process.
The default implementation for set_pdeathsig/0
Signalling a process when the parent has exited is not available on this platform.
The default implementation for setproctitle/2
Uses :prx.setproctitle/2 on all platforms.
The default implementation for subprocess/1
fork(2) a subprocess from the supervisor.
The default implementation for subreaper/1
No changes are made to the process: background processes will not be terminated.