You can't use /dev/mem if you're not root; but fortunately there's a simpler interface to read the memory of process: ptrace.

For those who don't already know. Ptrace is the system call on linux and many other unixes that debuggers such as gdb and strace use. With ptrace any process can inspect any other process that is running under the same uid (provided that the other process is not setuid or setgid; root can ptrace any process but init). You can trace system calls and signals, read or write the virtual address space and registers of the traced process. You can single-step a process by setting the single-step flag of the processor, and catching the generated SIGTRAP signals with ptrace.


In reply to Re: Re: Re: Re: May Thy Closures Be Blessed by ambrus
in thread May Thy Closures Be Blessed by hardburn

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.