How can I programmatically determine what the resource limits pertaining to the currently-running process are?

Maybe getrlimit(2) — at least that's the system call used under the hood of the shell builtin ulimit.

There's also the module BSD::Resource (a wrapper around the related system calls getrlimit, setrlimit, getrusage, etc.): 

use BSD::Resource;

my $rlimits = get_rlimits();
for my $rl (sort keys %$rlimits) {
    printf "%-15s : %s\n", $rl, getrlimit($rlimits->{$rl});
}

__END__
RLIMIT_AS       : 3412459520
RLIMIT_CORE     : 0
RLIMIT_CPU      : -1
RLIMIT_DATA     : -1
RLIMIT_FSIZE    : -1
RLIMIT_LOCKS    : -1
RLIMIT_MEMLOCK  : 32768
RLIMIT_NOFILE   : 1024
RLIMIT_NPROC    : 16383
RLIMIT_OFILE    : 1024
RLIMIT_OPEN_MAX : 1024
RLIMIT_RSS      : 1794068480
RLIMIT_STACK    : 8388608
RLIMIT_VMEM     : 3412459520

[download]

In reply to Re: How to determine what the memory-limits of a CGI app are? by almut
in thread How to determine what the memory-limits of a CGI app are? [SOLVED] by locked_user sundialsvc4

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.