- error.pl -- Error generating support
- apply.pl -- Apply predicates on a list
- lists.pl -- List Manipulation
- 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
- gensym.pl -- Generate unique symbols
- settings.pl -- Setting management
- arithmetic.pl -- Extensible arithmetic
- main.pl -- Provide entry point for scripts
- readutil.pl -- Read utilities
- 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
- pairs.pl -- Operations on key-value lists
- prolog_source.pl -- Examine Prolog source-files
- sgml.pl -- SGML, XML and HTML parser
- quasi_quotations.pl -- Define Quasi Quotation syntax
- uri.pl -- Process URIs
- url.pl -- Analysing and constructing URL
- www_browser.pl -- Open a URL in the users browser
- prolog_colour.pl -- Prolog syntax colouring support.
- record.pl -- Access compound arguments by name
- prolog_xref.pl -- Prolog cross-referencer data collection
- occurs.pl -- Finding and counting sub-terms
- ordsets.pl -- Ordered set manipulation
- assoc.pl -- Binary associations
- ugraphs.pl -- Graph manipulation library
- xpath.pl -- Select nodes in an XML DOM
- iostream.pl -- Utilities to deal with streams
- atom.pl -- Operations on atoms
- solution_sequences.pl -- Modify solution sequences
- prolog_pack.pl -- A package manager for Prolog
- process.pl -- Create processes and redirect I/O
- prolog_config.pl -- Provide configuration information
- git.pl -- Run GIT commands
- ctypes.pl -- Character code classification
- time.pl -- Time and alarm library
- utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
- base64.pl -- Base64 encoding and decoding
- sha.pl -- SHA secure hashes
- persistency.pl -- Provide persistent dynamic predicates
- pure_input.pl -- Pure Input from files and streams
- nb_set.pl -- Non-backtrackable sets
- xsdp_types.pl -- XML-Schema primitive types
- uuid.pl -- Universally Unique Identifier (UUID) Library
- pcre.pl -- Perl compatible regular expression matching for SWI-Prolog
- aggregate.pl -- Aggregation operators on backtrackable predicates
- rdf_write.pl -- Write RDF/XML from a list of triples
- rdf.pl -- RDF/XML parser
- sgml_write.pl -- XML/SGML writer module
- archive.pl -- Access several archive formats
- csv.pl -- Process CSV (Comma-Separated Values) data
- dialect.pl -- Support multiple Prolog dialects
- apply_macros.pl -- Goal expansion rules to avoid meta-calling
- dif.pl -- The dif/2 constraint
- thread.pl -- High level thread primitives
- rdf_triple.pl -- Create triples from intermediate representation
- rbtrees.pl -- Red black trees
- 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
- sandbox.pl -- Sandboxed Prolog code
- modules.pl -- Module utility predicates
- random.pl -- Random numbers
- pengines_io.pl -- Provide Prolog I/O for HTML clients
- listing.pl -- List programs and pretty print clauses
- 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_clause.pl -- Get detailed source-information about a clause
- prolog_breakpoints.pl -- Manage Prolog break-points
- dicts.pl -- Dict utilities
- backcomp.pl -- Backward compatibility
- oset.pl -- Ordered set manipulation
- prolog_stack.pl -- Examine the Prolog stack
- predicate_options.pl -- Access and analyse predicate options
- codesio.pl -- I/O on Lists of Character Codes
- readline.pl -- GNU readline interface
- zip.pl -- Access resource ZIP archives
- isub.pl -- isub: a string similarity measure
- plunit.pl -- Unit Testing
- date.pl -- Process dates and times
- help.pl -- Text based manual
- unicode.pl -- Unicode string handling
- statistics.pl -- Get information about resource usage
- heaps.pl -- heaps/priority queues
- threadutil.pl -- Interactive thread utilities
- prolog_trace.pl -- Print access to predicates
- snowball.pl -- The Snowball multi-lingual stemmer library
- paxos.pl -- A Replicated Data Store
- prolog_code.pl -- Utilities for reasoning about code
- prolog_codewalk.pl -- Prolog code walker
- prolog_format.pl -- Analyse format specifications
- check.pl -- Consistency checking
- intercept.pl -- Intercept and signal interface
- prolog_history.pl -- Per-directory persistent commandline history
- system.pl -- System utilities
- optparse.pl -- command line parsing
- quintus.pl -- Quintus compatibility
- jpl.pl -- A Java interface for SWI Prolog 7.x
- make.pl -- Reload modified source files
- editline.pl -- BSD libedit based command line editing
- edit.pl -- Editor interface
- terms.pl -- Term manipulation
- base32.pl -- Base32 encoding and decoding
- coinduction.pl -- Co-Logic Programming
- varnumbers.pl -- Utilities for numbered terms
- when.pl -- Conditional coroutining
- wfs.pl -- Well Founded Semantics interface
- xmldsig.pl -- XML Digital signature
- doc_latex.pl -- PlDoc LaTeX backend
- streampool.pl -- Input multiplexing
- prolog_metainference.pl -- Infer meta-predicate properties
- c14n2.pl -- C14n2 canonical XML documents
- xmlenc.pl -- XML encryption library
- udp_broadcast.pl -- A UDP broadcast proxy
- explain.pl -- Describe Prolog Terms
- shell.pl -- Elementary shell commands
- writef.pl -- Old-style formatted write
- protobufs.pl -- Google's Protocol Buffers
- test_cover.pl -- Clause cover analysis
- double_metaphone.pl -- Phonetic string matching
- ansi_term.pl -- Print decorated text to ANSI consoles
- doc_files.pl -- Create stand-alone documentation files
- prolog_wrap.pl -- Wrapping predicates
- win_menu.pl -- Console window menu
- tty.pl -- Terminal operations
- pwp.pl -- Prolog Well-formed Pages
- qsave.pl -- Save current program as a state or executable
- prolog_autoload.pl -- Autoload all dependencies
- yaml.pl -- Process YAML data
- prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
- cgi.pl -- Read CGI parameters
- 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.