`umask 0037`;

The primary reason this fails is probably that there is no executable named umask on your system. I can't be certain there is non, as someone may have done something unusual on your system, but generally there is none.

When I run such a command on my system, I get the following error: Can't exec "umask": No such file or directory at ./test.pl line 5.

There is no umask executable because it would be difficult to write and contrary to the convention that child processes do not modify their parent process and would otherwise be useless except to display the current setting. It is a shell builtin function so that it can change the setting of the shell.

In reply to Re: invoking umask command in perl by ig
in thread invoking umask command in perl by austin43

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.