I'm trying to use both getc (for single chars) and readline (for more than one char) to capture user input in a script. I usually just use <STDIN> but want to expand my horizons, plus getc avoids a chomp. But using getc prevents subsequent calls to readline from waiting for input! Why does it do that? For example: 
print 'readline> ';
$_ = readline;

print $_;

print 'getc> ';
$_ = getc;

print "$_\n";

print 'readline> ';
$_ = readline;

print 'WTF';

[download]
The result: 
readline> x
x
getc> x
x
readline> WTF

In reply to getc vs readline by Anonymous Monk

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