I'm fooling around with giving file system directives in bash versus perl, and I noticed the following: 
$rm -rf a; mkdir -m0777 a;ls -ld a
drwxrwxrwx  2 hartmann users 48 2006-06-07 20:09 a
$rm -rf a; perl -e 'mkdir ('a', 0777)';ls -ld a
drwxr-xr-x  2 hartmann users 48 2006-06-07 20:09 a

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I would expect the above commands -- make directory a with all permissions granted to everyone -- to give the same result.

But in mkdir from perl, group and "all" are missing the write permissions.

I am curious about this and wonder if there is a rationale for the discrepancy.

Clarification welcome!

In reply to Why does unix mkdir and perl mkdir behave differently? by tphyahoo

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