</noinclude> {{#switch:{{{3}}} |attrib={{#switch:{{{1}}}<!-- section titles from https://pubs.opengroup.org/onlinepubs/9799919799/ -->|7|bd=Base Definitions<!-- -->|1|8|cu=Shell and Utilities<!-- -->|2|3|sh=System Interfaces<!-- -->|rat=Rationale|#default={{#if:{{{shhh}}}||(ERROR: [[Template:Man/SUS|SUS section]] {{{1}}} invalid)}}}} Reference, [[Single Unix Specification|The Single UNIX Specification]], Version 4 from [[The Open Group]] |url=https://pubs.opengroup.org/onlinepubs/9799919799/{{#switch:{{{1}}}<!-- -->|7|bd=basedefs<!-- -->|1|8|cu=utilities<!-- -->|2|3|sh=functions<!-- -->|rat=xrat}}/{{{2}}}.html |display_section=}} <noinclude>