200 lines
6.4 KiB
OCaml
200 lines
6.4 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1996 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the GNU Library General Public License, with *)
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(* the special exception on linking described in file ../LICENSE. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(** System interface. *)
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val argv : string array
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(** The command line arguments given to the process.
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The first element is the command name used to invoke the program.
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The following elements are the command-line arguments
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given to the program. *)
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val executable_name : string
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(** The name of the file containing the executable currently running. *)
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external file_exists : string -> bool = "caml_sys_file_exists"
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(** Test if a file with the given name exists. *)
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external remove : string -> unit = "caml_sys_remove"
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(** Remove the given file name from the file system. *)
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external rename : string -> string -> unit = "caml_sys_rename"
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(** Rename a file. The first argument is the old name and the
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second is the new name. If there is already another file
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under the new name, [rename] may replace it, or raise an
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exception, depending on your operating system. *)
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external getenv : string -> string = "caml_sys_getenv"
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(** Return the value associated to a variable in the process
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environment. Raise [Not_found] if the variable is unbound. *)
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external command : string -> int = "caml_sys_system_command"
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(** Execute the given shell command and return its exit code. *)
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external time : unit -> float = "caml_sys_time"
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(** Return the processor time, in seconds, used by the program
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since the beginning of execution. *)
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external chdir : string -> unit = "caml_sys_chdir"
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(** Change the current working directory of the process. *)
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external getcwd : unit -> string = "caml_sys_getcwd"
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(** Return the current working directory of the process. *)
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external readdir : string -> string array = "caml_sys_read_directory"
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(** Return the names of all files present in the given directory.
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Names denoting the current directory and the parent directory
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(["."] and [".."] in Unix) are not returned. Each string in the
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result is a file name rather than a complete path. There is no
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guarantee that the name strings in the resulting array will appear
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in any specific order; they are not, in particular, guaranteed to
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appear in alphabetical order. *)
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val interactive : bool ref
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(** This reference is initially set to [false] in standalone
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programs and to [true] if the code is being executed under
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the interactive toplevel system [ocaml]. *)
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val os_type : string
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(** Operating system currently executing the Caml program. One of
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- ["Unix"] (for all Unix versions, including Linux and Mac OS X),
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- ["Win32"] (for MS-Windows, OCaml compiled with MSVC++ or Mingw),
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- ["Cygwin"] (for MS-Windows, OCaml compiled with Cygwin). *)
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val word_size : int
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(** Size of one word on the machine currently executing the Caml
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program, in bits: 32 or 64. *)
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val max_string_length : int
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(** Maximum length of a string. *)
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val max_array_length : int
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(** Maximum length of a normal array. The maximum length of a float
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array is [max_array_length/2] on 32-bit machines and
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[max_array_length] on 64-bit machines. *)
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(** {6 Signal handling} *)
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type signal_behavior =
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Signal_default
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| Signal_ignore
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| Signal_handle of (int -> unit)
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(** What to do when receiving a signal:
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- [Signal_default]: take the default behavior
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(usually: abort the program)
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- [Signal_ignore]: ignore the signal
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- [Signal_handle f]: call function [f], giving it the signal
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number as argument. *)
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external signal :
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int -> signal_behavior -> signal_behavior = "caml_install_signal_handler"
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(** Set the behavior of the system on receipt of a given signal. The
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first argument is the signal number. Return the behavior
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previously associated with the signal. If the signal number is
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invalid (or not available on your system), an [Invalid_argument]
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exception is raised. *)
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val set_signal : int -> signal_behavior -> unit
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(** Same as {!Sys.signal} but return value is ignored. *)
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(** {7 Signal numbers for the standard POSIX signals.} *)
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val sigabrt : int
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(** Abnormal termination *)
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val sigalrm : int
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(** Timeout *)
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val sigfpe : int
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(** Arithmetic exception *)
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val sighup : int
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(** Hangup on controlling terminal *)
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val sigill : int
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(** Invalid hardware instruction *)
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val sigint : int
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(** Interactive interrupt (ctrl-C) *)
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val sigkill : int
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(** Termination (cannot be ignored) *)
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val sigpipe : int
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(** Broken pipe *)
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val sigquit : int
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(** Interactive termination *)
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val sigsegv : int
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(** Invalid memory reference *)
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val sigterm : int
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(** Termination *)
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val sigusr1 : int
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(** Application-defined signal 1 *)
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val sigusr2 : int
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(** Application-defined signal 2 *)
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val sigchld : int
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(** Child process terminated *)
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val sigcont : int
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(** Continue *)
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val sigstop : int
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(** Stop *)
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val sigtstp : int
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(** Interactive stop *)
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val sigttin : int
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(** Terminal read from background process *)
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val sigttou : int
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(** Terminal write from background process *)
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val sigvtalrm : int
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(** Timeout in virtual time *)
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val sigprof : int
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(** Profiling interrupt *)
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exception Break
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(** Exception raised on interactive interrupt if {!Sys.catch_break}
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is on. *)
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val catch_break : bool -> unit
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(** [catch_break] governs whether interactive interrupt (ctrl-C)
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terminates the program or raises the [Break] exception.
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Call [catch_break true] to enable raising [Break],
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and [catch_break false] to let the system
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terminate the program on user interrupt. *)
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val ocaml_version : string;;
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(** [ocaml_version] is the version of Objective Caml.
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It is a string of the form ["major.minor[.patchlevel][+additional-info]"],
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where [major], [minor], and [patchlevel] are integers, and
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[additional-info] is an arbitrary string. The [[.patchlevel]] and
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[[+additional-info]] parts may be absent. *)
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