xpa(n)

✨ xpa(n) — the XPA table of contents, bestie edition ✨

okay so you opened the xpa(n) page from the SAORD Documentation and it's literally just the Table of Contents for XPA. That's it. That's the whole vibe. But it's a good table of contents, so let's go 💅

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🌸 NAME 🌸

XPA: Public Access to Data and Algorithms — yes queen, it spells it out for you right there 👑

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🎀 SYNOPSIS 🎀

This document is the Table of Contents for XPA. Short. Iconic. To the point. No notes.

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🦋 DESCRIPTION 🦋

Okay so picture this: the XPA messaging system gives you seamless communication between sooo many kinds of Unix programs — including X programs and Tcl/Tk programs. It's giving universal translator but make it sockets. 💫

It also hands users an easy way to talk to XPA-enabled programs: just run XPA client commands in the shell, or drop those same commands into scripts. And because XPA works both at the programming level and the shell level, it's a genuinely powerful tool for unifying any analysis environment. Users and programmers get tons of flexibility choosing the best level (or levels, plural, we're greedy ✨) to access XPA services, and client access can be extended or modified easily at any time. lowkey the dream.

A program becomes an XPA-enabled server by defining named points of public access — little doorways 🚪 through which data and commands get exchanged with other client programs (and users, hi 👋). Using standard TCP sockets as the transport mechanism, XPA supports both single-point and broadcast messaging to and from these servers. It supports direct client↔server communication, or indirect communication via an intermediate message bus emulation program. Host-based access control is implemented, and so is the ability to communicate with XPA servers across a network. no cap.

XPA implements a layered interface, designed to be useful both to software developers and to users. The interface is:

• a library of XPA client and server routines for use in C/C++ programs, and
• a suite of high-level user programs built on top of those libraries.

Using the XPA library, access points can be added to Tcl/Tk programs, Xt programs, or Unix programs that use the XPA event loop — or any event loop based on select(). Client access subroutines can be added to any Tcl/Tk, Xt, or Unix program. Client access also is supported at the command line via a suite of high-level programs. versatile much?? 🫶

🧚 Choose from the following topics:

• Introduction to XPA [xpaintro(n)]
• Access Point Names and Templates [xpatemplate(n)]
• Getting Common Information About Access Points [xpacommon(n)]
• Communication Methods [xpamethod(n)]
• Communication Between Hosts [xpainet(n)]
• Distinguishing Users [xpausers(n)]
• XPA User Programs
  • xpaget: get data and info [xpaget(1)]
  • xpaset: send data and info [xpaset(1)]
  • xpainfo: send info alert [xpainfo(1)]
  • xpaaccess: get access point info [xpaaccess(1)]
  • xpamb: message bus emulation [xpamb(1)]
  • xpans: the XPA name server [xpans(1)]
• XPA Server Routines
  • XPANew: define a new access point [xpanew(3)]
  • XPACmdNew: define a new command access point [xpacmdnew(3)]
  • XPACmdAdd: add a command [xpacmdadd(3)]
  • XPACmdDel: delete a command [xpacmddel(3)]
  • XPAInfoNew: define an info access point [xpainfonew(3)]
  • XPAFree: free an access point [xpafree(3)]
  • XPAMainLoop: event loop for select server [xpamainloop(3)]
  • XPAPoll: poll for XPA events [xpapoll(3)]
  • XPACleanup: release reserved XPA memory [xpacleanup(3)]
  • XPA Server Macros: accessing structure internals [xpamacros(3)]
  • XPA Race Conditions: how to avoid them [xparace(3)]
  • XPA Out of Memory (OOM) errors [xpaoom(3)]
• XPA Client Routines
  • XPAOpen: open a persistent client connection [xpaopen(3)]
  • XPAClose: close persistent client connection [xpaclose(3)]
  • XPAGet: get data [xpaget(3)]
  • XPASet: send data or commands [xpaset(3)]
  • XPAInfo: send an info alert [xpainfo(3)]
  • XPAGetFd: get data and write to an fd [xpagetfd(3)]
  • XPASetFd: read data from and fd and send [xpasetfd(3)]
  • XPANSLookup: look up an access point [xpanslookup(3)]
  • XPAAccess: get access info [xpaaccess(3)]
  • The XPA/Xt Interface: Xt interface to XPA [xpaxt(n)]
  • The XPA/Tcl Interface: Tcl interface to XPA [xpatcl(n)]
• Tailoring the XPA Environment
  • Environment Variables [xpaenv(n)]
  • Access Control [xpaacl(n)]
• Miscellaneous
  • Where to Find Example/Test Code
  • User Changes Between XPA 1.0 and 2.0
  • API Changes Between XPA 1.0 and 2.0
  • What Does XPA Stand For, Anyway?

fr fr, that last one is the real mystery of our time 🔍

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and that's the whole page bestie, you're caught up 💖

this roundup came to you courtesy of version 2.1.15, dated July 23, 2013 — yes it's vintage, and yes it still ate. mwah 💅✨