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