oct
See the current Perl documentation for oct.
Here is our local, out-dated (pre-5.6) version:
oct - convert a string to an octal number
oct EXPR
oct
Interprets
EXPR as an octal string and returns the corresponding value. (If
EXPR happens to start off with
0x
, interprets it as a hex string instead.) The following will handle decimal, octal, and hex in the standard Perl or
C notation:
$val = oct($val) if $val =~ /^0/;
If
EXPR is omitted, uses $_
. This function is commonly used when a string such as 644
needs to be converted into a file mode, for example. (Although perl will
automatically convert strings into numbers as needed, this automatic
conversion assumes base 10.)