oct

oct

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. If EXPR starts off with 0b, it is interpreted as a binary string. Leading whitespace is ignored in all three cases.) The following will handle decimal, binary, octal, and hex in standard Perl notation:

$val = oct($val) if $val =~ /^0/;

If EXPR is omitted, uses $_ . To go the other way (produce a number in octal), use sprintf() or printf():

$dec_perms = (stat("filename"))[2] & 07777;
$oct_perm_str = sprintf "%o", $perms;

The oct() function is commonly used when a string such as 6