devkit 1.20210120 · OCaml Package

*nix support

val log : Log.logger

val fork : unit -> [> `Child | `Forked of int ]

val unparent : unit -> unit

fork off and die

val daemonize : unit -> unit

val write_pidfile : string -> unit

val read_pidfile : string -> int

val probe_pidfile : 
  string ->
  [> `Alive of int | `Error of exn | `Missing | `Stale ]

val check_pidfile : string -> unit

val manage_pidfile : string -> unit

val restart : ('a -> 'b) -> 'a -> 'b

val handle_sig_exit_with : exit:bool -> (unit -> unit) -> unit

NB be careful with mutexes in signal handlers. Outputting anything to ocaml channels is a potential deadlock. Use signalfd which invokes signal handlers in predictable context.

deprecated
easy to deadlock, use signalfd instead

val handle_sig_reload_with : (unit -> unit) -> unit

deprecated
easy to deadlock, use signalfd instead

val show_addr : Unix.sockaddr -> string

val get_inet_addr_exn : Unix.sockaddr -> Unix.inet_addr

val show_inet_addr_exn : Unix.sockaddr -> string

val make_inet_addr_exn : string -> int -> Unix.sockaddr

val inet_addr_of_string : string -> Unix.sockaddr

val unix_addr_of_string : string -> Unix.sockaddr

val parse_addr_port_exn : string -> string * int

val parse_ip_port_exn : string -> Unix.inet_addr * int

Parse input as ip:port

returns
a tuple representing ip and port

val sockaddr_of_string : string -> Unix.sockaddr

Convert a string to a Unix.sockaddr.

Formats supported are:

unix:file_path
host:port
*:port, using Unix.inet_addr_any
port, using Unix.inet_addr_loopback

val read_process : string -> string

Execute process and capture stdout to string,

returns
empty string on error

module Ev = Libevent

val output_process_exit : string -> Unix.process_status IO.output

returns
IO.t to feed stdin of spawned process

val output_process : string -> unit IO.output

returns
IO.t to feed stdin of spawned process

val write_process_exn : string -> ExtBytes.Bytes.t -> unit

val write_process : string -> ExtBytes.Bytes.t -> bool

val mounts : unit -> (string * string * string list) list

val find_mount : string -> string * string * string list

parameter path
must be normalized

val sleep : float -> unit

val output_buf_fd : ?bufsize:int -> Unix.file_descr -> unit IO.output

Buffered output to Unix.file_descr. Doesn't own the file descriptor.

val unlimit_soft : Devkit_core.Prelude.U.resource -> unit

val raise_limits : unit -> unit

raise core and nofile soft limits (to the corresponding hard limits)

val connect : Unix.file_descr -> Unix.sockaddr -> unit

val connect_lwt : Lwt_unix.file_descr -> Lwt_unix.sockaddr -> unit Lwt.t

val get_xdg_dir : env:string -> string -> string

val xdg_cache_dir : string lazy_t

val xdg_config_dir : string lazy_t

val quote_if_needed : string -> string

val args : string list

val cmdline : string

package devkit