July 2011
Intermediate to advanced
104 pages
2h 14m
English
Content preview from Perl Pocket Reference, 5th EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Environment Variables
Perl uses several environment variables. With a few exceptions, these all start with PERL. Library packages and platform-dependent features may have their own environment variables.
These are the most common environment variables:
HOMEUsed if chdir has no argument.
LC_ALL, LC_CTYPE, LC_COLLATE, LC_NUMERIC, PERL_BADLANG, LANGUAGE, LANGControls how Perl handles data specific to particular natural languages.
LOGDIRUsed if chdir has no argument and
HOMEis not set.PATHUsed in executing subprocesses, and in finding the Perl script if
-Sis used.PERL5LIBA colon-separated list of directories to search for Perl library files before looking in the standard library and the current directory.
PERLLIBUsed instead of
PERL5LIBifPERL5LIBis not defined.PERL5OPTInitial (command-line) options for Perl.
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