- error.pl -- Error generating support
- apply.pl -- Apply predicates on a list
- lists.pl -- List Manipulation
- pairs.pl -- Operations on key-value lists
- debug.pl -- Print debug messages and test assertions
- broadcast.pl -- Event service
- socket.pl -- Network socket (TCP and UDP) library
- shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
- option.pl -- Option list processing
- uid.pl -- User and group management on Unix systems
- unix.pl -- Unix specific operations
- syslog.pl -- Unix syslog interface
- thread_pool.pl -- Resource bounded thread management
- rbtrees.pl -- Red black trees
- gensym.pl -- Generate unique symbols
- readutil.pl -- Read utilities
- url.pl -- Analysing and constructing URL
- utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
- uri.pl -- Process URIs
- settings.pl -- Setting management
- arithmetic.pl -- Extensible arithmetic
- sgml.pl -- SGML, XML and HTML parser
- iostream.pl -- Utilities to deal with streams
- dialect.pl -- Support multiple Prolog dialects
- quasi_quotations.pl -- Define Quasi Quotation syntax
- pure_input.pl -- Pure Input from files and streams
- time.pl -- Time and alarm library
- ssl.pl -- Secure Socket Layer (SSL) library
- crypto.pl -- Cryptography and authentication library
- filesex.pl -- Extended operations on files
- doc_http.pl -- Documentation server
- pldoc.pl -- Process source documentation
- operators.pl -- Manage operators
- prolog_source.pl -- Examine Prolog source-files
- base64.pl -- Base64 encoding and decoding
- aggregate.pl -- Aggregation operators on backtrackable predicates
- ordsets.pl -- Ordered set manipulation
- oset.pl -- Ordered set manipulation
- www_browser.pl -- Open a URL in the users browser
- process.pl -- Create processes and redirect I/O
- prolog_colour.pl -- Prolog syntax colouring support.
- prolog_xref.pl -- Prolog cross-referencer data collection
- solution_sequences.pl -- Modify solution sequences
- nb_set.pl -- Non-backtrackable sets
- terms.pl -- Term manipulation
- apply_macros.pl -- Goal expansion rules to avoid meta-calling
- modules.pl -- Module utility predicates
- predicate_options.pl -- Access and analyse predicate options
- prolog_clause.pl -- Get detailed source-information about a clause
- occurs.pl -- Finding and counting sub-terms
- listing.pl -- List programs and pretty print clauses
- ansi_term.pl -- Print decorated text to ANSI consoles
- record.pl -- Access compound arguments by name
- assoc.pl -- Binary associations
- ugraphs.pl -- Graph manipulation library
- xpath.pl -- Select nodes in an XML DOM
- atom.pl -- Operations on atoms
- ctypes.pl -- Character code classification
- backcomp.pl -- Backward compatibility
- system.pl -- System utilities
- prolog_pack.pl -- A package manager for Prolog
- prolog_config.pl -- Provide configuration information
- quintus.pl -- Quintus compatibility
- rdf_triple.pl -- Create triples from intermediate representation
- sgml_write.pl -- XML/SGML writer module
- xsdp_types.pl -- XML-Schema primitive types
- thread.pl -- High level thread primitives
- git.pl -- Run GIT commands
- sha.pl -- SHA secure hashes
- persistency.pl -- Provide persistent dynamic predicates
- c14n2.pl -- C14n2 canonical XML documents
- dicts.pl -- Dict utilities
- snowball.pl -- The Snowball multi-lingual stemmer library
- sandbox.pl -- Sandboxed Prolog code
- prolog_format.pl -- Analyse format specifications
- when.pl -- Conditional coroutining
- double_metaphone.pl -- Phonetic string matching
- uuid.pl -- Universally Unique Identifier (UUID) Library
- pcre.pl -- Perl compatible regular expression matching for SWI-Prolog
- rdf_write.pl -- Write RDF/XML from a list of triples
- date.pl -- Process dates and times
- archive.pl -- Access several archive formats
- csv.pl -- Process CSV (Comma-Separated Values) data
- dif.pl -- The dif/2 constraint
- nb_rbtrees.pl -- Non-backtrackable operations on red black trees
- pengines.pl -- Pengines: Web Logic Programming Made Easy
- charsio.pl -- I/O on Lists of Character Codes
- random.pl -- Random numbers
- pengines_io.pl -- Provide Prolog I/O for HTML clients
- yall.pl -- Lambda expressions
- prolog_stream.pl -- A stream with Prolog callbacks
- zlib.pl -- Zlib wrapper for SWI-Prolog
- bdb.pl -- Berkeley DB interface
- hash_stream.pl -- Maintain a hash on a stream
- md5.pl -- MD5 hashes
- pprint.pl -- Pretty Print Prolog terms
- lazy_lists.pl -- Lazy list handling
- edinburgh.pl -- Some traditional Edinburgh predicates
- prolog_breakpoints.pl -- Manage Prolog break-points
- paxos.pl -- A Replicated Data Store
- prolog_code.pl -- Utilities for reasoning about code
- prolog_stack.pl -- Examine the Prolog stack
- statistics.pl -- Get information about resource usage
- jpl.pl -- A Java interface for SWI Prolog 7.x
- unicode.pl -- Unicode string handling
- protobufs.pl -- Google's Protocol Buffers
- base32.pl -- Base32 encoding and decoding
- codesio.pl -- I/O on Lists of Character Codes
- coinduction.pl -- Co-Logic Programming
- heaps.pl -- heaps/priority queues
- varnumbers.pl -- Utilities for numbered terms
- intercept.pl -- Intercept and signal interface
- writef.pl -- Old-style formatted write
- yaml.pl -- Process YAML data
- optparse.pl -- command line parsing
- editline.pl -- BSD libedit based command line editing
- doc_latex.pl -- PlDoc LaTeX backend
- wfs.pl -- Well Founded Semantics interface
- cgi.pl -- Read CGI parameters
- test_cover.pl -- Clause cover analysis
- shell.pl -- Elementary shell commands
- threadutil.pl -- Interactive thread utilities
- plunit.pl -- Unit Testing
- prolog_codewalk.pl -- Prolog code walker
- check.pl -- Consistency checking
- prolog_autoload.pl -- Autoload all dependencies
- prolog_metainference.pl -- Infer meta-predicate properties
- isub.pl -- isub: a string similarity measure
- pwp.pl -- Prolog Well-formed Pages
- streampool.pl -- Input multiplexing
- process_create(+Exe, +Args:list, +Options) is det
- Create a new process running the file Exe and using arguments
from the given list. Exe is a file specification as handed to
absolute_file_name/3. Typically one use the
pathfile alias to specify an executable file on the current PATH. Args is a list of arguments that are handed to the new process. On Unix systems, each element in the list becomes a seperate argument in the new process. In Windows, the arguments are simply concatenated to form the commandline. Each argument itself is either a primitive or a list of primitives. A primitive is either atomic or a term
file(Spec), the system inserts a filename using the OS filename conventions which is properly quoted if needed.
- Bind the standard streams of the new process. Spec is one of
the terms below. If
pipe(Pipe)is used, the Prolog stream is a stream in text-mode using the encoding of the default locale. The encoding can be changed using set_stream/2. The options
stderrmay use the same stream, in which case both output streams are connected to the same Prolog stream.
- Just share with the Prolog I/O streams. On Unix,
user_input, etc. are bound to a file handle but not to 0,1,2 the process I/O is bound to the file handles of these streams.
- Bind to a null stream. Reading from such a stream returns end-of-file, writing produces no output
- Attach input and/or output to a Prolog stream.
- Attach input or output to an existing Prolog stream.
This stream must be associated with an OS file
handle (see stream_property/2, property
file_no). This option is not provided by the SICStus implementation.
- Run the new process in Directory. Directory can be a compound specification, which is converted using absolute_file_name/3. See also process_set_method/1.
environment(List), but only the specified variables are passed, i.e., no variables are inherited.
- Specify additional environment variables for the new process.
List is a list of
Name=Valueterms, where Value is expanded the same way as the Args argument. If neither
environmentis passed the environment is inherited from the Prolog process.
- Unify PID with the process id of the created process.
- In Unix: If
true, detach the process from the terminal Currently mapped to
setsid(); Also creates a new process group for the child In Windows: If
true, detach the process from the current job via the CREATE_BREAKAWAY_FROM_JOB flag. In Vista and beyond, processes launched from the shell directly have the 'compatibility assistant' attached to them automatically unless they have a UAC manifest embedded in them. This means that you will get a permission denied error if you try and assign the newly-created PID to a job you create yourself.
true, create a window for the process (Windows only)
- In Unix: specifies the process priority for the newly created process. Priority must be an integer between -20 and 19. Positive values are nicer to others, and negative values are less so. The default is zero. Users are free to lower their own priority. Only the super-user may raise it to less-than zero.
If the user specifies the
process(-PID)option, he must call process_wait/2 to reclaim the process. Without this option, the system will wait for completion of the process after the last pipe stream is closed.
If the process is not waited for, it must succeed with status 0. If not, an process_error is raised.
On Windows this call is an interface to the CreateProcess() API. The commandline consists of the basename of Exe and the arguments formed from Args. Arguments are separated by a single space. If all characters satisfy
iswalnum()it is unquoted. If the argument contains a double-quote it is quoted using single quotes. If both single and double quotes appear a domain_error is raised, otherwise double-quote are used.
The CreateProcess() API has many options. Currently only the
CREATE_NO_WINDOWoptions is supported through the
window(+Bool)option. If omitted, the default is to use this option if the application has no console. Future versions are likely to support more window specific options and replace win_exec/2.
First, a very simple example that behaves the same as
shell('ls -l'), except for error handling:
?- process_create(path(ls), ['-l'], ).
The following example uses grep to find all matching lines in a file.
grep(File, Pattern, Lines) :- setup_call_cleanup( process_create(path(grep), [ Pattern, file(File) ], [ stdout(pipe(Out)) ]), read_lines(Out, Lines), close(Out)). read_lines(Out, Lines) :- read_line_to_codes(Out, Line1), read_lines(Line1, Out, Lines). read_lines(end_of_file, _, ) :- !. read_lines(Codes, Out, [Line|Lines]) :- atom_codes(Line, Codes), read_line_to_codes(Out, Line2), read_lines(Line2, Out, Lines).
process_error(Exe, Status)where Status is one of
killed(Signal). Raised if the process is waited for (i.e., Options does not include
process(-PID)), and does not exit with status 0.
- - On Windows,
environment(List)is handled as
env(List), i.e., the environment is not inherited.