язык сканирования и обработки шаблонов (pattern scanning and processing language)
Смотри также (See also)
Section 1.3, Grammar Conventions, grep(1p), lex(1p), sed(1p)
The Base Definitions volume of POSIX.1‐2017, Chapter 5, File
Format Notation, Section 6.1, Portable Character Set, Chapter 8,
Environment Variables, Chapter 9, Regular Expressions, Section
12.2, Utility Syntax Guidelines
The System Interfaces volume of POSIX.1‐2017, atof(3p), exec(1p),
isspace(3p), popen(3p), setlocale(3p), strtod(3p)
