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Perl in a Nutshell

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Function Reference
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readlink name

Returns the name of a file pointed to by the symbolic link name. name should evaluate to a filename, the last component of which is a symbolic link. If it is not a symbolic link, or if symbolic links are not implemented, or if some system error occurs, the undefined value is returned, and you should check the error code in $!. If name is omitted, the function uses $_.

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