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.\" ========================================================================
.\"
.IX Title "Devel::Autoflush 3pm"
.TH Devel::Autoflush 3pm "2022-10-13" "perl v5.34.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
Devel::Autoflush \- Set autoflush from the command line
.SH "VERSION"
.IX Header "VERSION"
version 0.06
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& perl \-MDevel::Autoflush Makefile.PL
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This module is a hack to set autoflush for \s-1STDOUT\s0 and \s-1STDERR\s0 from the command
line or from \f(CW\*(C`PERL5OPT\*(C'\fR for code that needs it but doesn't have it.
.PP
This often happens when prompting:
.PP
.Vb 3
\&  # guess.pl
\&  print "Guess a number: ";
\&  my $n = <STDIN>;
.Ve
.PP
As long as the output is going to a terminal, the prompt is flushed when \s-1STDIN\s0
is read.  However, if the output is being piped, the print statement will 
not automatically be flushed, no prompt will be seen and the program will
silently appear to hang while waiting for input.  This might happen with 'tee':
.PP
.Vb 1
\&  $ perl guess.pl | tee capture.out
.Ve
.PP
Use Devel::Autoflush to work around this:
.PP
.Vb 1
\&  $ perl \-MDevel::Autoflush guess.pl | tee capture.out
.Ve
.PP
Or set it in \f(CW\*(C`PERL5OPT\*(C'\fR:
.PP
.Vb 2
\&  $ export PERL5OPT=\-MDevel::Autoflush
\&  $ perl guess.pl | tee capture.out
.Ve
.PP
= \s-1SEE ALSO\s0
.IP "\(bu" 4
CPANPLUS::Internals::Utils::Autoflush \*(-- same idea but \s-1STDOUT\s0 only and
.Sp
only available as part of the full \s-1CPANPLUS\s0 distribution
.SH "SUPPORT"
.IX Header "SUPPORT"
.SS "Bugs / Feature Requests"
.IX Subsection "Bugs / Feature Requests"
Please report any bugs or feature requests through the issue tracker
at <https://github.com/dagolden/Devel\-Autoflush/issues>.
You will be notified automatically of any progress on your issue.
.SS "Source Code"
.IX Subsection "Source Code"
This is open source software.  The code repository is available for
public review and contribution under the terms of the license.
.PP
<https://github.com/dagolden/Devel\-Autoflush>
.PP
.Vb 1
\&  git clone https://github.com/dagolden/Devel\-Autoflush.git
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
David Golden <dagolden@cpan.org>
.SH "COPYRIGHT AND LICENSE"
.IX Header "COPYRIGHT AND LICENSE"
This software is Copyright (c) 2014 by David Golden.
.PP
This is free software, licensed under:
.PP
.Vb 1
\&  The Apache License, Version 2.0, January 2004
.Ve