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Module Extended_unix

Signature

val fork_exec : ?stdin:Core.Std.Unix.File_descr.t -> ?stdout:Core.Std.Unix.File_descr.t -> ?stderr:Core.Std.Unix.File_descr.t -> ?path_lookup:bool -> ?env:[
| `Extend of (string * string) list
| `Replace of (string * string) list
] -> ?working_dir:string -> ?setuid:int -> ?setgid:int -> string -> string list -> Core.Std.Pid.t

fork_exec prog args ~stdin ~stdout ~stderr ~setuid ~setgid forks a new process that executes the program in file prog, with arguments args. The pid of the new process is returned immediately; the new process executes concurrently with the current process.

The function raises EPERM if when using set{gid,uid} and the user id is not 0.

The standard input and outputs of the new process are connected to the descriptors stdin, stdout and stderr.

The close_on_exec flag is cleared from stderr stdout and stdin so it's safe to pass in fds with close_on_exec set.

Param [path_lookup] if true than we use PATH to find the process to exec.
TODO: CUSTOM TAG env [specifies the environment the process runs in
ERRORS: Unix.unix_error. This function should not raise EINTR; it will restart itself automatically.
RATIONAL: setuid and setgid do not do a full id drop (e.g.: they save the id in saved id) when the user does not have the privileges required to setuid to anyone.
By default all file descriptors should be set_closexec ASAP after being open to avoid being captured in parallel execution of fork_exec; resetting the closexec flag on the forked flag is a cleaner and more thread safe approach.
BUGS: The capabilities for setuid in linux are not tied to the uid 0 (man 7 capabilities). It is still fair to assume that under most system this capability is there IFF uid == 0. A more fine grain permissionning approach would make this function non-portable and be hard to implement in an async-signal-way.
Because this function keeps the lock for most of its lifespan and restarts automatically on EINTR it might prevent the OCaml signal handlers to run in that thread.]
val seteuid : int -> unit
val setreuid : uid:int -> euid:int -> unit
external ntohl : Core.Std.Int32.t -> Core.Std.Int32.t = "extended_ml_ntohl"

Network to host order long, like C.

external htonl : Core.Std.Int32.t -> Core.Std.Int32.t = "extended_ml_htonl"

Host to network order long, like C.

type statvfs = {
bsize
: int ; (* file system block size *)
frsize
: int ; (* fragment size *)
blocks
: int ; (* size of fs in frsize units *)
bfree
: int ; (* # free blocks *)
bavail
: int ; (* # free blocks for non-root *)
files
: int ; (* # inodes *)
ffree
: int ; (* # free inodes *)
favail
: int ; (* # free inodes for non-root *)
fsid
: int ; (* file system ID *)
flag
: int ; (* mount flags *)
namemax
: int ; (* maximum filename length *)
}
val bin_read_statvfs : statvfs Core.Std.Bin_prot.Read.reader
val __bin_read_statvfs__ : (int -> statvfs) Core.Std.Bin_prot.Read.reader
val bin_reader_statvfs : statvfs Core.Std.Bin_prot.Type_class.reader
val bin_size_statvfs : statvfs Core.Std.Bin_prot.Size.sizer
val bin_write_statvfs : statvfs Core.Std.Bin_prot.Write.writer
val bin_writer_statvfs : statvfs Core.Std.Bin_prot.Type_class.writer
val statvfs_of_sexp : Sexplib.Sexp.t -> statvfs
val sexp_of_statvfs : statvfs -> Sexplib.Sexp.t
external statvfs : string -> statvfs = "statvfs_stub"

get file system statistics

external getloadavg : unit -> float * float * float = "getloadavg_stub"

get load averages

module Extended_passwd : sig .. end
external strptime : fmt:string -> string -> Core.Std.Unix.tm = "unix_strptime"

The CIDR module moved into Core.Unix

module Inet_port : sig .. end
Simple int wrapper to be explicit about ports.
module Mac_address : sig .. end
module Quota : sig .. end
module Mount_entry : sig .. end
val terminal_width : int Core.Std.Lazy.t