include module type of struct include Sys endThe command line arguments given to the process. The first element is the command name used to invoke the program. The following elements are the command-line arguments given to the program.
The name of the file containing the executable currently running. This name may be absolute or relative to the current directory, depending on the platform and whether the program was compiled to bytecode or a native executable.
Returns true if the given name refers to a directory, false if it refers to another kind of file.
Rename a file. rename oldpath newpath renames the file called oldpath, giving it newpath as its new name, moving it between directories if needed. If newpath already exists, its contents will be replaced with those of oldpath. Depending on the operating system, the metadata (permissions, owner, etc) of newpath can either be preserved or be replaced by those of oldpath.
Return the value associated to a variable in the process environment or None if the variable is unbound.
Execute the given shell command and return its exit code.
The argument of Sys.command is generally the name of a command followed by zero, one or several arguments, separated by whitespace. The given argument is interpreted by a shell: either the Windows shell cmd.exe for the Win32 ports of OCaml, or the POSIX shell sh for other ports. It can contain shell builtin commands such as echo, and also special characters such as file redirections > and <, which will be honored by the shell.
Conversely, whitespace or special shell characters occurring in command names or in their arguments must be quoted or escaped so that the shell does not interpret them. The quoting rules vary between the POSIX shell and the Windows shell. The Filename.quote_command performs the appropriate quoting given a command name, a list of arguments, and optional file redirections.
Return the processor time, in seconds, used by the program since the beginning of execution.
Return the names of all files present in the given directory. Names denoting the current directory and the parent directory ("." and ".." in Unix) are not returned. Each string in the result is a file name rather than a complete path. There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order.
val interactive : bool refThis reference is initially set to false in standalone programs and to true if the code is being executed under the interactive toplevel system ocaml.
Operating system currently executing the OCaml program. One of
"Unix" (for all Unix versions, including Linux and Mac OS X),"Win32" (for MS-Windows, OCaml compiled with MSVC++ or Mingw),"Cygwin" (for MS-Windows, OCaml compiled with Cygwin).Currently, the official distribution only supports Native and Bytecode, but it can be other backends with alternative compilers, for example, javascript.
val backend_type : backend_typeBackend type currently executing the OCaml program.
Size of one word on the machine currently executing the OCaml program, in bits: 32 or 64.
Size of int, in bits. It is 31 (resp. 63) when using OCaml on a 32-bit (resp. 64-bit) platform. It may differ for other implementations, e.g. it can be 32 bits when compiling to JavaScript.
Maximum length of a normal array (i.e. any array whose elements are not of type float). The maximum length of a float array is max_floatarray_length if OCaml was configured with --enable-flat-float-array and max_array_length if configured with --disable-flat-float-array.
Maximum length of a floatarray. This is also the maximum length of a float array when OCaml is configured with --enable-flat-float-array.
Return the name of the runtime variant the program is running on. This is normally the argument given to -runtime-variant at compile time, but for byte-code it can be changed after compilation.
Return the value of the runtime parameters, in the same format as the contents of the OCAMLRUNPARAM environment variable.
type signal_behavior = Sys.signal_behavior = What to do when receiving a signal:
Signal_default: take the default behavior (usually: abort the program)Signal_ignore: ignore the signalSignal_handle f: call function f, giving it the signal number as argument.val signal : int -> signal_behavior -> signal_behaviorSet the behavior of the system on receipt of a given signal. The first argument is the signal number. Return the behavior previously associated with the signal. If the signal number is invalid (or not available on your system), an Invalid_argument exception is raised.
val set_signal : int -> signal_behavior -> unitSame as Sys.signal but return value is ignored.
Exception raised on interactive interrupt if Sys.catch_break is on.
catch_break governs whether interactive interrupt (ctrl-C) terminates the program or raises the Break exception. Call catch_break true to enable raising Break, and catch_break false to let the system terminate the program on user interrupt.
ocaml_version is the version of OCaml. It is a string of the form "major.minor[.patchlevel][(+|~)additional-info]", where major, minor, and patchlevel are integers, and additional-info is an arbitrary string. The [.patchlevel] part was absent before version 3.08.0 and became mandatory from 3.08.0 onwards. The [(+|~)additional-info] part may be absent.
type extra_info = extra_prefix * stringtype ocaml_release_info = Sys.ocaml_release_info = {major : int;minor : int;patchlevel : int;extra : extra_info option;}val ocaml_release : ocaml_release_infoControl whether the OCaml runtime system can emit warnings on stderr. Currently, the only supported warning is triggered when a channel created by open_* functions is finalized without being closed. Runtime warnings are disabled by default.
For the purposes of optimization, opaque_identity behaves like an unknown (and thus possibly side-effecting) function.
At runtime, opaque_identity disappears altogether.
A typical use of this function is to prevent pure computations from being optimized away in benchmarking loops. For example:
for _round = 1 to 100_000 do
ignore (Sys.opaque_identity (my_pure_computation ()))
donemodule Immediate64 = Sys.Immediate64