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yap-6.3/library/system.yap
Vítor Santos Costa 50c8724322 linux backport 
file exists system predicate
$source_file -> $user source
hide and make system preds
fix check_head_and_body
user_expansion never fails
goal expansion is controlled b dynamic procedure
add must_be_of_type predicate_indicator
fix neat_call, debug flag is user controlled
use simplecudd, not ptoblogbdd
compile all of myddas
fx junk in file_name
fix warnings
use common file opening struct and funds
avoid pairs module
fix db queues
2016-01-04 14:11:09 +00:00

816 lines
22 KiB
Prolog
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: system.yap *
* Last rev: *
* mods: *
* comments: Operating System Access built-ins *
* *
*************************************************************************/
/**
* @file system.yap
* @author VITOR SANTOS COSTA <vsc@VITORs-MBP.lan>
* @date Wed Nov 18 01:23:45 2015
*
* @brief interaction with the OS, be it Unix, Linux, or Windows.
*
*
*/
:- module( operating_system_support,
[
datime/1,
delete_file/1,
delete_file/2,
directory_files/2,
environ/2,
exec/3,
file_exists/1,
file_exists/2,
file_property/2,
host_id/1,
host_name/1,
kill/1,
md5/3,
pid/1,
mktemp/2,
make_directory/1,
popen/3,
rename_file/2,
shell/0,
shell/1,
shell/2,
sleep/1,
system/0,
system/1,
system/2,
mktime/2,
tmpnam/1,
tmp_file/2,
tmpdir/1,
wait/2,
working_directory/2
]).
/** @defgroup operating_system_support, Operating System Functionality
@ingroup library
@{
YAP provides a library of system utilities compatible with the
SICStus Prolog system library. This library extends and to some point
complements the functionality of Operating System access routines. The
library includes Unix/Linux and Win32 `C` code. They
are available through the `use_module(library(system))` command.
*/
/**
@pred datime(datime(- _Year_, - _Month_, - _DayOfTheMonth_, - _Hour_, - _Minute_, - _Second_)
The datime/1 procedure returns the current date and time, with
information on _Year_, _Month_, _DayOfTheMonth_,
_Hour_, _Minute_, and _Second_. The _Hour_ is returned
on local time. This function uses the WIN32
`GetLocalTime` function or the Unix `localtime` function.
~~~~~
?- datime(X).
X = datime(2001,5,28,15,29,46) ?
~~~~~
*/
/** @pred environ(+ _E_,- _S_)
Given an environment variable _E_ this predicate unifies the second argument _S_ with its value.
*/
/** @pred system(+ _S_)
Passes command _S_ to the Bourne shell (on UNIX environments) or the
current command interpreter in WIN32 environments.
*/
/** @pred working_directory(- _CurDir_,? _NextDir_)
Fetch the current directory at _CurDir_. If _NextDir_ is bound
to an atom, make its value the current working directory.
*/
/** @pred delete_file(+ _File_)
The delete_file/1 procedure removes file _File_. If
_File_ is a directory, remove the directory <em>and all its subdirectories</em>.
~~~~~
?- delete_file(x).
~~~~~
*/
/** @pred delete_file(+ _File_,+ _Opts_)
The `delete_file/2` procedure removes file _File_ according to
options _Opts_. These options are `directory` if one should
remove directories, `recursive` if one should remove directories
recursively, and `ignore` if errors are not to be reported.
This example is equivalent to using the delete_file/1 predicate:
~~~~~
?- delete_file(x, [recursive]).
~~~~~
*/
/** @pred directory_files(+ _Dir_,+ _List_)
Given a directory _Dir_, directory_files/2 procedures a
listing of all files and directories in the directory:
~~~~~
?- directory_files('.',L), writeq(L).
['Makefile.~1~','sys.so','Makefile','sys.o',x,..,'.']
~~~~~
The predicates uses the `dirent` family of routines in Unix
environments, and `findfirst` in WIN32.
*/
/** @pred environ(? _EnvVar_,+ _EnvValue_)
Unify environment variable _EnvVar_ with its value _EnvValue_,
if there is one. This predicate is backtrackable in Unix systems, but
not currently in Win32 configurations.
~~~~~
?- environ('HOME',X).
X = 'C:\\cygwin\\home\\administrator' ?
~~~~~
*/
/** @pred exec(+ _Command_, _StandardStreams_,- _PID_)
Execute command _Command_ with its standard streams connected to
the list [_InputStream_, _OutputStream_, _ErrorStream_]. The
process that executes the command is returned as _PID_. The
command is executed by the default shell `bin/sh -c` in Unix.
The following example demonstrates the use of exec/3 to send a
command and process its output:
~~~~~
exec(ls,[std,pipe(S),null],P),repeat, get0(S,C), (C = -1, close(S) ! ; put(C)).
~~~~~
The streams may be one of standard stream, `std`, null stream,
`null`, or `pipe(S)`, where _S_ is a pipe stream. Note
that it is up to the user to close the pipe.
*/
/** @pred file_exists(+ _File_)
The atom _File_ corresponds to an existing file.
*/
/** @pred file_property(+ _File_,? _Property_)
The atom _File_ corresponds to an existing file, and _Property_
will be unified with a property of this file. The properties are of the
form `type( _Type_)`, which gives whether the file is a regular
file, a directory, a fifo file, or of unknown type;
`size( _Size_)`, with gives the size for a file, and
`mod_time( _Time_)`, which gives the last time a file was
modified according to some Operating System dependent
timestamp; `mode( _mode_)`, gives the permission flags for the
file, and `linkto( _FileName_)`, gives the file pointed to by a
symbolic link. Properties can be obtained through backtracking:
~~~~~
?- file_property('Makefile',P).
P = type(regular) ? ;
P = size(2375) ? ;
P = mod_time(990826911) ? ;
no
~~~~~
*/
/** @pred host_id(- _Id_)
Unify _Id_ with an identifier of the current host. YAP uses the
`hostid` function when available,
*/
/** @pred host_name(- _Name_)
Unify _Name_ with a name for the current host. YAP uses the
`hostname` function in Unix systems when available, and the
`GetComputerName` function in WIN32 systems.
*/
/** @pred mktemp( _Spec_,- _File_)
Direct interface to `mktemp`: given a _Spec_, that is a file
name with six _X_ to it, create a file name _File_. Use
tmpnam/1 instead.
*/
/** @pred mktime(+_Datime_, - _Seconds_)
The `mktime/2` procedure receives a term of the form _datime(+ _Year_,
+ _Month_, + _DayOfTheMonth_, + _Hour_, + _Minute_, + _Second_)_ and
returns the number of _Seconds_ elapsed since 00:00:00 on January 1,
1970, Coordinated Universal Time (UTC). The user provides information
on _Year_, _Month_, _DayOfTheMonth_, _Hour_, _Minute_, and
_Second_. The _Hour_ is given on local time. This function uses the
WIN32 `GetLocalTime` function or the Unix `mktime` function.
~~~~~
?- mktime(datime(2001,5,28,15,29,46),X).
X = 991081786 ? ;
~~~~~
*/
/** @pred pid(- _Id_)
Unify _Id_ with the process identifier for the current
process. An interface to the <tt>getpid</tt> function.
*/
/** @pred popen(+ _Command_, + _TYPE_, - _Stream_)
Interface to the <tt>popen</tt> function. It opens a process by creating a
pipe, forking and invoking _Command_ on the current shell. Since a
pipe is by definition unidirectional the _Type_ argument may be
`read` or `write`, not both. The stream should be closed
using close/1, there is no need for a special `pclose`
command.
The following example demonstrates the use of popen/3 to process
the output of a command, as exec/3 would do:
~~~~~{.prolog}
?- popen(ls,read,X),repeat, get0(X,C), (C = -1, ! ; put(C)).
X = 'C:\\cygwin\\home\\administrator' ?
~~~~~
The WIN32 implementation of popen/3 relies on exec/3.
*/
/** @pred rename_file(+ _OldFile_,+ _NewFile_)
Create file _OldFile_ to _NewFile_. This predicate uses the
`C` built-in function `rename`.
*/
/** @pred shell
Start a new shell and leave YAP in background until the shell
completes. YAP uses the shell given by the environment variable
`SHELL`. In WIN32 environment YAP will use `COMSPEC` if
`SHELL` is undefined.
*/
/** @pred shell(+ _Command_)
Execute command _Command_ under a new shell. YAP will be in
background until the command completes. In Unix environments YAP uses
the shell given by the environment variable `SHELL` with the option
`" -c "`. In WIN32 environment YAP will use `COMSPEC` if
`SHELL` is undefined, in this case with the option `" /c "`.
*/
/** @pred shell(+ _Command_,- _Status_)
Execute command _Command_ under a new shell and unify _Status_
with the exit for the command. YAP will be in background until the
command completes. In Unix environments YAP uses the shell given by the
environment variable `SHELL` with the option `" -c "`. In
WIN32 environment YAP will use `COMSPEC` if `SHELL` is
undefined, in this case with the option `" /c "`.
*/
/** @pred sleep(+ _Time_)
Block the current thread for _Time_ seconds. When YAP is compiled
without multi-threading support, this predicate blocks the YAP process.
The number of seconds must be a positive number, and it may an integer
or a float. The Unix implementation uses `usleep` if the number of
seconds is below one, and `sleep` if it is over a second. The WIN32
implementation uses `Sleep` for both cases.
*/
/** @pred system
Start a new default shell and leave YAP in background until the shell
completes. YAP uses `/bin/sh` in Unix systems and `COMSPEC` in
WIN32.
*/
/** @pred system(+ _Command_,- _Res_)
Interface to `system`: execute command _Command_ and unify
_Res_ with the result.
*/
/** @pred tmp_file(+_Base_, - _File_)
Create a name for a temporary file. _Base_ is an user provided
identifier for the category of file. The _TmpName_ is guaranteed to
be unique. If the system halts, it will automatically remove all created
temporary files.
*/
/** @pred tmpnam(- _File_)
Interface with _tmpnam_: obtain a new, unique file name _File_.
*/
/** @pred working_directory(- _Old_,+ _New_)
Unify _Old_ with an absolute path to the current working directory
and change working directory to _New_. Use the pattern
`working_directory(CWD, CWD)` to get the current directory. See
also `absolute_file_name/2` and chdir/1.
*/
:- use_module(library(lists), [append/3]).
:- load_foreign_files([sys], [], init_sys).
:- dynamic tmp_file_sequence_counter/1.
% time builtins
datime(X) :-
datime(X, Error),
handle_system_internal(Error, off, datime(X)).
mktime(V, A) :- var(V), !,
throw(error(instantiation_error,mktime(V,A))).
mktime(In,Out) :-
check_mktime_inp(In, mktime(In,Out)),
In = datime(Y,Mo,D,H,Mi,S),
mktime(Y, Mo, D, H, Mi, S, Out, Error),
handle_system_internal(Error, off, mktime(In,Out)).
check_mktime_inp(V, Inp) :- var(V), !,
throw(error(instantiation_error,Inp)).
check_mktime_inp(datime(Y,Mo,D,H,Mi,S), Inp) :- !,
check_int(Y, Inp),
check_int(Mo, Inp),
check_int(D, Inp),
check_int(H, Inp),
check_int(Mi, Inp),
check_int(S, Inp).
check_mktime_inp(T, Inp) :-
throw(error(domain_error(mktime,T),Inp)).
check_int(I, _) :- integer(I), !.
check_int(I, Inp) :- var(I),
throw(error(instantiation_error,Inp)).
check_int(I, Inp) :-
throw(error(type_error(integer,I),Inp)).
% file operations
% file operations
delete_file(IFile) :-
true_file_name(IFile, File),
delete_file(File, off, on, off).
delete_file(IFile, Opts) :-
true_file_name(IFile, File),
process_delete_file_opts(Opts, Dir, Recurse, Ignore, delete_file(File,Opts)),
delete_file(File, Dir, Recurse, Ignore).
process_delete_file_opts(V, _, _, _, T) :- var(V), !,
throw(error(instantiation_error,T)).
process_delete_file_opts([], off, off, off, _) :- !.
process_delete_file_opts([V|_], _, _, _, T) :- var(V), !,
throw(error(instantiation_error,T)).
process_delete_file_opts([directory|Opts], on, Recurse, Ignore, T) :- !,
process_delete_file_opts(Opts, _, Recurse, Ignore, T).
process_delete_file_opts([recursive|Opts], Dir, on, Ignore, T) :- !,
process_delete_file_opts(Opts, Dir, _, Ignore, T).
process_delete_file_opts([ignore|Opts], Dir, Recurse, on, T) :- !,
process_delete_file_opts(Opts, Dir, Recurse, _, T).
process_delete_file_opts(Opts, _, _, _, T) :-
throw(error(domain_error(delete_file_option,Opts),T)).
delete_file(IFile, Dir, Recurse, Ignore) :-
true_file_name(IFile, File),
file_property(File, Type, _, _, _Permissions, _, Ignore),
delete_file(Type, File, Dir, Recurse, Ignore).
delete_file(N, File, _Dir, _Recurse, Ignore) :- number(N), !, % error.
handle_system_internal(N, Ignore, delete_file(File)).
delete_file(directory, File, Dir, Recurse, Ignore) :-
delete_directory(Dir, File, Recurse, Ignore), !.
delete_file(_, File, _Dir, _Recurse, Ignore) :-
unlink_file(File, Ignore).
unlink_file(IFile, Ignore) :-
true_file_name(IFile, File),
unlink(File, N),
handle_system_internal(N, Ignore, delete_file(File)).
delete_directory(on, File, _Recurse, Ignore) :-
rm_directory(File, Ignore).
delete_directory(off, File, Recurse, Ignore) :-
delete_directory(Recurse, File, Ignore).
rm_directory(File, Ignore) :-
rmdir(File, Error),
handle_system_internal(Error, Ignore, delete_file(File)).
delete_directory(on, File, Ignore) :-
directory_files(File, FileList, Ignore),
path_separator(D),
atom_concat(File, D, FileP),
delete_dirfiles(FileList, FileP, Ignore),
rmdir(File, Ignore).
delete_dirfiles([], _, _).
delete_dirfiles(['.'|Fs], File, Ignore) :- !,
delete_dirfiles(Fs, File, Ignore).
delete_dirfiles(['..'|Fs], File, Ignore) :- !,
delete_dirfiles(Fs, File, Ignore).
delete_dirfiles([F|Fs], File, Ignore) :-
atom_concat(File,F,TrueF),
delete_file(TrueF, off, on, Ignore),
delete_dirfiles(Fs, File, Ignore).
directory_files(File, FileList) :-
directory_files(File, FileList, on).
directory_files(File, FileList, Ignore) :-
list_directory(File, FileList, Error),
handle_system_internal(Error, Ignore, directory_files(File, FileList)).
handle_system_internal(Error, _Ignore, _G) :- var(Error), !.
handle_system_internal(Error, off, G) :- atom(Error), !,
throw(error(system_internal(Error),G)).
handle_system_internal(Error, off, G) :-
error_message(Error, Message),
throw(error(system_internal(Message),G)).
handle_system_internal(Error, _Id, _Ignore, _G) :- var(Error), !.
handle_system_internal(Error, _SIG, off, G) :- integer(Error), !,
error_message(Error, Message),
throw(error(system_internal(Message),G)).
handle_system_internal(signal, SIG, off, G) :- !,
throw(error(system_internal(child_signal(SIG)),G)).
handle_system_internal(stopped, SIG, off, G) :-
throw(error(system_internal(child_stopped(SIG)),G)).
file_property(IFile, type(Type)) :-
true_file_name(IFile, File),
file_property(File, Type, _Size, _Date, _Permissions, _LinkName).
file_property(IFile, size(Size)) :-
true_file_name(IFile, File),
file_property(File, _Type, Size, _Date, _Permissions, _LinkName).
file_property(IFile, mod_time(Date)) :-
true_file_name(IFile, File),
file_property(File, _Type, _Size, Date, _Permissions, _LinkName).
file_property(IFile, mode(Permissions)) :-
true_file_name(IFile, File),
file_property(File, _Type, _Size, _Date, Permissions, _LinkName).
file_property(IFile, linkto(LinkName)) :-
true_file_name(IFile, File),
file_property(File, _Type, _Size, _Date, _Permissions, LinkName),
atom(LinkName).
file_property(File, Type, Size, Date, Permissions, LinkName) :-
file_property(File, Type, Size, Date, Permissions, LinkName, Error),
handle_system_internal(Error, off, file_property(File)).
file_exists(File, Permissions) :-
var(File), !,
throw(error(instantiation_error,file_exists(File, Permissions))).
file_exists(File, Permissions) :-
\+ atom(File), !,
throw(error(type_error(atom,File),file_exists(File, Permissions))).
file_exists(IFile, Permissions) :-
true_file_name(IFile, File),
file_property(File, _Type, _Size, _Date, FPermissions, _, Error),
var(Error),
process_permissions(Permissions, Perms),
FPermissions /\ Perms =:= Perms.
process_permissions(Number, Number) :- integer(Number).
%
% environment manipulation.
%
environ(Na,Val) :- var(Na), !,
environ_enum(0,I),
( p_environ(I,S) -> environ_split(S,SNa,SVal) ; !, fail ),
atom_codes(Na, SNa),
atom_codes(Val, SVal).
environ(Na,Val) :- atom(Na), !,
bound_environ(Na, Val).
environ(Na,Val) :-
throw(error(type_error(atom,Na),environ(Na,Val))).
bound_environ(Na, Val) :- var(Val), !,
getenv(Na,Val).
bound_environ(Na, Val) :- atom(Val), !,
putenv(Na,Val).
bound_environ(Na, Val) :-
throw(error(type_error(atom,Val),environ(Na,Val))).
environ_enum(X,X).
environ_enum(X,X1) :-
Xi is X+1,
environ_enum(Xi,X1).
environ_split([61|SVal], [], SVal) :- !.
environ_split([C|S],[C|SNa],SVal) :-
environ_split(S,SNa,SVal).
%
% process execution
%
exec(Command, [StdIn, StdOut, StdErr], PID) :-
G = exec(Command, [StdIn, StdOut, StdErr], PID),
check_command_with_default_shell(Command, TrueCommand, G),
process_inp_stream_for_exec(StdIn, In, G, [], L1),
process_out_stream_for_exec(StdOut, Out, G, L1, L2),
process_err_stream_for_exec(StdErr, Err, G, L2, L3),
( exec_command(TrueCommand, In, Out, Err, PID, Error) -> true ; true ),
close_temp_streams(L3),
handle_system_internal(Error, off, G).
process_inp_stream_for_exec(Error, _, G, L, L) :- var(Error), !,
close_temp_streams(L),
throw(error(instantiation_error,G)).
process_inp_stream_for_exec(null, null, _, L, L) :- !.
process_inp_stream_for_exec(std, 0, _, L, L) :- !.
process_inp_stream_for_exec(pipe(ForWriting), ForReading, _, L, [ForReading|L]) :- var(ForWriting), !,
open_pipe_streams(ForReading, ForWriting).
process_inp_stream_for_exec(pipe(Stream), _, _, L, L) :- !,
stream_property(Stream, input).
process_inp_stream_for_exec(Stream, Stream, _, L, L) :-
stream_property(Stream, put).
process_out_stream_for_exec(Error, _, G, L, L) :- var(Error), !,
close_temp_streams(L),
throw(error(instantiation_error,G)).
process_out_stream_for_exec(null, null, _, L, L) :- !.
process_out_stream_for_exec(std, 1, _, L, L) :- !.
process_out_stream_for_exec(pipe(ForReading), ForWriting, _, L, [ForWriting|L]) :- var(ForReading), !,
open_pipe_streams(ForReading, ForWriting).
process_out_stream_for_exec(pipe(Stream), _, _, L, L) :- !,
stream_property(Stream, output).
process_out_stream_for_exec(Stream, Stream, _, L, L) :-
stream_property(Stream, output).
process_err_stream_for_exec(Error, _, G, L, L) :- var(Error), !,
close_temp_streams(L),
throw(error(instantiation_error,G)).
process_err_stream_for_exec(null, null, _, L, L) :- !.
process_err_stream_for_exec(std, 2, _, L, L) :- !.
process_err_stream_for_exec(pipe(ForReading), ForWriting, _, L, [ForWriting|L]) :- var(ForReading), !,
open_pipe_streams(ForReading, ForWriting).
process_err_stream_for_exec(pipe(Stream), Stream, _, L, L) :- !,
stream_property(Stream, output).
process_err_stream_for_exec(Stream, Stream, _, L, L) :-
stream_property(Stream, output).
close_temp_streams([]).
close_temp_streams([S|Ss]) :-
close(S),
close_temp_streams(Ss).
popen(Command, Mode, Stream) :-
open(pipe(Command), Mode, Stream).
check_command_with_default_shell(Com, ComF, G) :-
check_command(Com, G),
os_command_postprocess(Com, ComF).
%
% make sure that Windows executes the command from $COMSPEC.
%
os_command_postprocess(Com, ComF) :- win, !,
atom_codes(Com, SC),
append(" /c ", SC, SC1),
getenv('COMSPEC', Shell0),
atom_codes(Shell0, Codes),
append(Codes, SC1, SCF),
atom_codes(ComF, SCF).
os_command_postprocess(Com, Com).
check_command(Com, G) :- var(Com), !,
throw(error(instantiation_error,G)).
check_command(Com, _) :- atom(Com), !.
check_command(Com, G) :-
throw(error(type_error(atom,Com),G)).
check_mode(Mode, _, G) :- var(Mode), !,
throw(error(instantiation_error,G)).
check_mode(read, 0, _) :- !.
check_mode(write,1, _) :- !.
check_mode(Mode, G) :-
throw(error(domain_error(io_mode,Mode),G)).
shell :-
G = shell,
get_shell0(FullCommand),
exec_command(FullCommand, 0, 1, 2, PID, Error),
handle_system_internal(Error, off, G),
wait(PID, _Status, Error, Id),
handle_system_internal(Error, Id, off, G).
shell(Command) :-
G = shell(Command),
check_command(Command, G),
get_shell(Shell,Opt),
do_shell(Shell, Opt, Command, Status, Error),
Status = 0,
handle_system_internal(Error, off, G).
shell(Command, Status) :-
G = shell(Command, Status),
check_command(Command, G),
get_shell(Shell,Opt),
do_shell(Shell, Opt, Command, Status, Error),
handle_system_internal(Error, off, G).
protect_command([], [0'"]). % "
protect_command([H|L], [H|NL]) :-
protect_command(L, NL).
get_shell0(Shell) :-
getenv('SHELL', Shell), !.
get_shell0(Shell) :-
win, !,
getenv('COMSPEC', Shell).
get_shell0('/bin/sh').
get_shell(Shell, '-c') :-
getenv('SHELL', Shell), !.
get_shell(Shell, '/c') :-
win, !,
getenv('COMSPEC', Shell).
get_shell('/bin/sh','-c').
system :-
default_shell(Command),
do_system(Command, _Status, Error),
handle_system_internal(Error, off, system).
default_shell(Shell) :- win, !,
getenv('COMSPEC', Shell).
default_shell('/bin/sh').
system(Command, Status) :-
G = system(Command, Status),
check_command(Command, G),
do_system(Command, Status, Error),
Status = 0,
handle_system_internal(Error, off, G).
wait(PID,STATUS) :- var(PID), !,
throw(error(instantiation_error,wait(PID,STATUS))).
wait(PID,STATUS) :- integer(PID), !,
plwait(PID, STATUS, Error, _Detail),
handle_system_internal(Error, off, wait(PID,STATUS)).
wait(PID,STATUS) :-
throw(error(type_error(integer,PID),wait(PID,STATUS))).
%
% host info
%
host_name(X) :-
host_name(X, Error),
handle_system_internal(Error, off, host_name(X)).
host_id(X) :-
host_id(X0, Error),
handle_system_internal(Error, off, host_id(X)),
number_codes(X0, S),
atom_codes(X, S).
pid(X) :-
pid(X, Error),
handle_system_internal(Error, off, pid(X)).
kill(X,Y) :-
integer(X), integer(Y), !,
kill(X, Y, Error),
handle_system_internal(Error, off, kill(X,Y)).
kill(X,Y) :- (var(X) ; var(Y)), !,
throw(error(instantiation_error,kill(X,Y))).
kill(X,Y) :- integer(X), !,
throw(error(type_error(integer,Y),kill(X,Y))).
kill(X,Y) :-
throw(error(type_error(integer,X),kill(X,Y))).
mktemp(X,Y) :- var(X), !,
throw(error(instantiation_error,mktemp(X,Y))).
mktemp(X,Y) :-
atom(X), !,
mktemp(X, Y, Error),
handle_system_internal(Error, off, mktemp(X,Y)).
mktemp(X,Y) :-
throw(error(type_error(atom,X),mktemp(X,Y))).
tmpnam(X) :-
tmpnam(X, Error),
handle_system_internal(Error, off, tmpnam(X)).
%%% Added from Theo, path_seperator is used to replace the c predicate dir_separator which is not OS aware
tmpdir(TmpDir):-
tmpdir(Dir, Error),
handle_system_internal(Error, off, tmpdir(Dir)),
path_separator(D),
(atom_concat(_, D, Dir) ->
TmpDir = Dir
;
atom_concat(Dir, D, TmpDir)
).
path_separator('\\'):-
win, !.
path_separator('/').
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