pctl — Inferno 1.1ed

pctl

include "sys.m";
sys:= load Sys Sys->PATH;
pctl: fn(flags: int, movefd: list of ref FD): int;


NEWFD	Place the process in a new file descriptor group. By default, no files will be open for I/O after this pctl. However, any file descriptor passed in the movefd parameter will be preserved across the call.
FORKFD	Place the process in a new file descriptor group containing a copy of the current set of file descriptors. After this call, changes the process makes to its set of open file descriptors will not be visible to other processes.
NEWNS	Place the process in a new file name space group containing only a root directory, `/`, made from an attach to root. The current directory is unaffected by this call. No files other than `/` will be accessible by name after this pctl; `bind` and `mount` calls will be necessary to build a new name space.
FORKNS	Place the process in a new file name space group containing a copy of the current name space. After this call, changes the process makes to its name space, including `chdir` calls, will not affect other processes.
NEWPGRP	Establish a new process group with a group id equal to that of the pid of the calling process.