/usr/lib/swipl/library/unix.pl
AllApplicationManualNameSummaryHelp

  • swipl
    • library
      • error.pl
      • apply.pl -- Apply predicates on a list
      • lists.pl
      • debug.pl
      • broadcast.pl -- Event service
      • socket.pl -- Network socket (TCP and UDP) library
      • predicate_options.pl -- Access and analyse predicate options
      • shlib.pl -- Utility library for loading foreign objects (DLLs, shared objects)
      • option.pl
      • uid.pl -- User and group management on Unix systems
      • unix.pl -- Unix specific operations
        • fork/1
        • fork_exec/1
        • exec/1
        • wait/2
        • kill/2
        • pipe/2
        • dup/2
        • detach_IO/1
        • detach_IO/0
        • prctl/1
        • sysconf/1
      • syslog.pl
      • thread_pool.pl
      • gensym.pl
      • 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
      • pldoc.pl -- Process source documentation
      • operators.pl -- Manage operators
      • pairs.pl -- Operations on key-value lists
      • prolog_source.pl -- Examine Prolog source-files
      • pengines.pl -- Pengines: Web Logic Programming Made Easy
      • record.pl -- Access compound arguments by name
      • memfile.pl
      • sgml.pl -- SGML, XML and HTML parser
      • quasi_quotations.pl -- Define Quasi Quotation syntax
      • pure_input.pl -- Pure Input from files and streams
      • time.pl -- Time and alarm library
      • uri.pl -- Process URIs
      • solution_sequences.pl -- Modify solution sequences
      • uuid.pl -- Universally Unique Identifier (UUID) Library
      • ordsets.pl -- Ordered set manipulation
      • random.pl -- Random numbers
      • base64.pl -- Base64 encoding and decoding
      • aggregate.pl -- Aggregation operators on backtrackable predicates
      • pcre.pl -- Perl compatible regular expression matching for SWI-Prolog
      • pengines_io.pl -- Provide Prolog I/O for HTML clients
      • sandbox.pl -- Sandboxed Prolog code
      • apply_macros.pl -- Goal expansion rules to avoid meta-calling
      • assoc.pl -- Binary associations
      • prolog_format.pl -- Analyse format specifications
      • yall.pl -- Lambda expressions
      • sha.pl -- SHA secure hashes
      • process.pl -- Create processes and redirect I/O
      • filesex.pl -- Extended operations on files
      • 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
      • porter_stem.pl
      • csv.pl -- Process CSV (Comma-Separated Values) data
      • pprint.pl -- Pretty Print Prolog terms
      • atom.pl -- Operations on atoms
      • ctypes.pl -- Character code classification
      • modules.pl -- Module utility predicates
      • occurs.pl -- Finding and counting sub-terms
      • prolog_xref.pl -- Prolog cross-referencer data collection
      • prolog_colour.pl -- Prolog syntax colouring support.
      • lazy_lists.pl -- Lazy list handling
      • prolog_code.pl -- Utilities for reasoning about code
      • ugraphs.pl -- Graph manipulation library
      • xpath.pl -- Select nodes in an XML DOM
      • iostream.pl -- Utilities to deal with streams
      • doc_http.pl -- Documentation server
      • url.pl -- Analysing and constructing URL
      • www_browser.pl -- Open a URL in the users browser
      • prolog_pack.pl -- A package manager for Prolog
      • prolog_config.pl -- Provide configuration information
      • git.pl -- Run GIT commands
      • strings.pl -- String utilities
      • dif.pl -- The dif/2 constraint
      • dialect.pl -- Support multiple Prolog dialects
      • edinburgh.pl -- Some traditional Edinburgh predicates
      • ansi_term.pl -- Print decorated text to ANSI consoles
      • terms.pl -- Term manipulation
      • listing.pl -- List programs and pretty print clauses
      • persistency.pl -- Provide persistent dynamic predicates
      • pengines_sandbox.pl -- Declare Pengine interaction sandbox-safe
      • term_to_json.pl
      • prolog_stack.pl -- Examine the Prolog stack
      • prolog_clause.pl -- Get detailed source-information about a clause
      • prolog_breakpoints.pl -- Manage Prolog break-points
      • wfs.pl -- Well Founded Semantics interface
      • mallocinfo.pl -- Memory allocation details
      • chr.pl
      • sort.pl
      • dicts.pl -- Dict utilities
      • varnumbers.pl -- Utilities for numbered terms
      • nb_set.pl -- Non-backtrackable sets
      • rbtrees.pl -- Red black trees
      • prolog_stream.pl -- A stream with Prolog callbacks
      • backcomp.pl -- Backward compatibility
      • charsio.pl -- I/O on Lists of Character Codes
      • c14n2.pl -- C14n2 canonical XML documents
      • statistics.pl -- Get information about resource usage
      • sgml_write.pl -- XML/SGML writer module
      • base32.pl -- Base32 encoding and decoding
      • codesio.pl -- I/O on Lists of Character Codes
      • coinduction.pl -- Co-Logic Programming
      • date.pl -- Process dates and times
      • heaps.pl -- heaps/priority queues
      • when.pl -- Conditional coroutining
      • stomp.pl -- STOMP client.
      • paxos.pl -- A Replicated Data Store
      • check.pl -- Consistency checking
      • fastrw.pl -- Fast reading and writing of terms
      • unicode.pl -- Unicode string handling
      • rwlocks.pl -- Read/write locks
      • optparse.pl -- command line parsing
      • odbc.pl
      • oset.pl -- Ordered set manipulation
      • udp_broadcast.pl -- A UDP broadcast proxy
      • editline.pl -- BSD libedit based command line editing
      • edit.pl -- Editor interface
      • prolog_trace.pl -- Print access to predicates
      • shell.pl -- Elementary shell commands
      • quintus.pl -- Quintus compatibility
      • redis_streams.pl -- Using Redis streams
      • redis.pl -- Redis client
      • prolog_autoload.pl -- Autoload all dependencies
      • threadutil.pl -- Interactive thread utilities
      • streams.pl -- Manage Prolog streams
      • prolog_debug.pl -- User level debugging tools
      • archive.pl -- Access several archive formats
      • prolog_profile.pl -- Execution profiler
      • test_cover.pl -- Clause coverage analysis
      • xsdp_types.pl -- XML-Schema primitive types
      • thread.pl -- High level thread primitives
      • make.pl -- Reload modified source files
      • crypt.pl
      • prolog_metainference.pl -- Infer meta-predicate properties
      • macros.pl -- Macro expansion
      • prolog_codewalk.pl -- Prolog code walker
      • tables.pl -- XSB interface to tables
      • system.pl -- System utilities
      • yaml.pl -- Process YAML data
      • xmlenc.pl -- XML encryption library
      • rdf_parser.pl
      • rewrite_term.pl
      • protobufs.pl -- Google's Protocol Buffers ("protobufs")
      • utf8.pl -- UTF-8 encoding/decoding on lists of character codes.
      • mqi.pl
      • prolog_wrap.pl -- Wrapping predicates
      • double_metaphone.pl -- Phonetic string matching
      • pwp.pl -- Prolog Well-formed Pages
      • isub.pl -- isub: a string similarity measure
      • table.pl
      • zip.pl -- Access resource ZIP archives
      • plunit.pl -- Unit Testing
      • rdf_triple.pl -- Create triples from intermediate representation
      • hashtable.pl -- Hash tables
      • increval.pl -- Incremental dynamic predicate modification
      • doc_latex.pl -- PlDoc LaTeX backend
      • doc_files.pl -- Create stand-alone documentation files
      • streampool.pl -- Input multiplexing
      • readline.pl -- GNU readline interface
      • files.pl
      • rdf.pl -- RDF/XML parser
      • snowball.pl -- The Snowball multi-lingual stemmer library
      • rdf_write.pl -- Write RDF/XML from a list of triples
      • portray_text.pl -- Portray text
      • intercept.pl -- Intercept and signal interface
      • help.pl -- Text based manual
      • explain.pl -- Describe Prolog Terms
      • prolog_history.pl -- Per-directory persistent commandline history
      • xmldsig.pl -- XML Digital signature
      • writef.pl -- Old-style formatted write
      • prolog_jiti.pl -- Just In Time Indexing (JITI) utilities
      • prolog_versions.pl -- Demand specific Prolog versions
      • readln.pl -- Read line as list of tokens
      • cgi.pl -- Read CGI parameters
      • qsave.pl -- Save current program as a state or executable
      • rlimit.pl
 pipe(-InSream, -OutStream) is det
Create a communication-pipe. This is normally used to make a child communicate to its parent. After pipe/2, the process is cloned and, depending on the desired direction, both processes close the end of the pipe they do not use. Then they use the remaining stream to communicate. Here is a simple example:
:- use_module(library(unix)).

fork_demo(Result) :-
        pipe(Read, Write),
        fork(Pid),
        (   Pid == child
        ->  close(Read),
            format(Write, '~q.~n',
                   [hello(world)]),
            flush_output(Write),
            halt
        ;   close(Write),
            read(Read, Result),
            close(Read)
        ).