86 lines
3.9 KiB
OCaml
86 lines
3.9 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Caml Special Light *)
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(* *)
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(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 1995 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* Module [Sys]: 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 arguments given to the program. *)
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external file_exists: string -> bool = "sys_file_exists"
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(* Test if a file with the given name exists. *)
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external remove: string -> unit = "sys_remove"
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(* Remove the given file name from the file system. *)
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external getenv: string -> string = "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 = "sys_system_command"
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(* Execute the given shell command and return its exit code. *)
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external chdir: string -> unit = "sys_chdir"
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(* Change the current working directory of the process. *)
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external getcwd: unit -> string = "sys_getcwd"
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(* Return the current working directory of the process. *)
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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 [csltop]. *)
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(*** 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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- [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: int -> signal_behavior -> unit = "install_signal_handler"
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(* Set the behavior of the system on receipt of a given signal.
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The first argument is the signal number. *)
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val sigabrt: int (* Abnormal termination *)
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val sigalrm: int (* Timeout *)
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val sigfpe: int (* Arithmetic exception *)
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val sighup: int (* Hangup on controlling terminal *)
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val sigill: int (* Invalid hardware instruction *)
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val sigint: int (* Interactive interrupt (ctrl-C) *)
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val sigkill: int (* Termination (cannot be ignored) *)
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val sigpipe: int (* Broken pipe *)
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val sigquit: int (* Interactive termination *)
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val sigsegv: int (* Invalid memory reference *)
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val sigterm: int (* Termination *)
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val sigusr1: int (* Application-defined signal 1 *)
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val sigusr2: int (* Application-defined signal 2 *)
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val sigchld: int (* Child process terminated *)
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val sigcont: int (* Continue *)
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val sigstop: int (* Stop *)
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val sigtstp: int (* Interactive stop *)
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val sigttin: int (* Terminal read from background process *)
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val sigttou: int (* Terminal write from background process *)
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val sigvtalrm: int (* Timeout in virtual time *)
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(* Signal numbers for the standard POSIX signals. *)
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exception Break
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(* Exception raised on interactive interrupt if [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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