Spawning child processes with extra control.
This extends the Eio.Process API with more control over file-descriptors.
class virtual mgr : object ... endval spawn_unix :
sw:Eio.Std.Switch.t ->
mgr ->
?cwd:Eio.Fs.dir Eio.Path.t ->
fds:(int * Fd.t * Private.Fork_action.blocking) list ->
?env:string array ->
?executable:string ->
string list ->
Eio.Process.tspawn_unix ~sw mgr ~fds args spawns a child process running the command args.
The arguments are as for Eio.Process.spawn, except that it takes a list of FD mappings for Fork_action.inherit_fds directly, rather than just flows for the standard streams.
val sigchld : Eio.Condition.tIf an Eio backend installs a SIGCHLD handler, the handler will broadcast on this condition.
This allows non-Eio libraries (such as Lwt) to share its signal handler.
Note: Not all backends install a handler (e.g. eio_linux uses process descriptors instead), so be sure to call install_sigchld_handler if you need to use this.
install_sigchld_handler () sets the signal handler for SIGCHLD to broadcast sigchld.