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authorDarren Bane <darren.bane@gmail.com>2023-03-27 22:16:33 +0100
committerDarren Bane <darren.bane@gmail.com>2023-03-27 22:16:33 +0100
commitcb564a2f7b10a4cf2ef2dd5ae823f50947781347 (patch)
treee8203db95d372fd0e9ecc23b25f4afec90295957 /doc
parentfa161002e603eb29990351c292920ef2b717a071 (diff)
downloadlsp-cb564a2f7b10a4cf2ef2dd5ae823f50947781347.tar.gz
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-title: POSIX API for ISLisp

-author: Darren Bane

-copyright: 2021 Darren Bane, CC BY_SA

-

-# Abstract

-

-A mapping from Scheme's SRFI-170, "POSIX API", to ISLisp is defined.

-

-# Introduction

-

-Although they are similar, Scheme and ISLisp are not the same language. This document adapts the standard Scheme POSIX interface to ISLisp accounting for:

-

-* Different naming conventions (e.g. `predicatep` rather than `predicate?`)

-* Historical practice, in particular compatibility with OpenLisp (the only commercial implementation) is prioritised

-

-# Dependencies

-

-SRFI-170 depends on at least part of several other SRFIs, in particular:

-

-* SRFI-19, "Time Data Types and Procedures"

-* SRFI-106, "Networking operations"

-* SRFI-158, "Generators and Accumulators"

-

-SRFI-39, "Parameter objects", is superseded by ISLisp's dynamic variables.

-

-Only SRFI-106 is implemented fully; the subset of required symbols is taken from the others.

-

-# Mapping

-

-Any symbols not mentioned in the following are unchanged from SRFI-170.

-

-## S3.3, "File system"

-

-```table

-┌──────────────────┬──────────────────┐

-│      Scheme      │      ISLisp      │

-╞══════════════════╪══════════════════╡

-│ file-info?       │ file-info-p      │

-├──────────────────┼──────────────────┤

-│ delete-directory │ remove-directory │

-└──────────────────┴──────────────────┘

-```

-## S3.5, "Process state"

-

-```table

-┌────────────────────────┬──────────────────┐

-│         Scheme         │      ISLisp      │

-╞════════════════════════╪══════════════════╡

-│ set-umask!             │ set-umask        │

-├────────────────────────┼──────────────────┤

-│ set-current-directory! │ change-directory │

-├────────────────────────┼──────────────────┤

-│ pid                    │ getpid           │

-├────────────────────────┼──────────────────┤

-│ user-uid               │ getuid           │

-└────────────────────────┴──────────────────┘

-```

-## S3.11, "Environment variables"

-

-```table

-┌──────────────────────────┬────────┐

-│          Scheme          │ ISLisp │

-╞══════════════════════════╪════════╡

-│ get-environment-variable │ getenv │

-└──────────────────────────┴────────┘

-```

-## S3.12, "Terminal device control"

-

-```table

-┌───────────┬───────────┐

-│  Scheme   │  ISLisp   │

-╞═══════════╪═══════════╡

-│ terminal? │ terminalp │

-└───────────┴───────────┘

-```