I don't think there is a way to access ERRORLEVEL from a Perl script to check what the ERRORLEVEL is *before* starting the Perl script. You can access it after calling a command with 'system', such as:

# successful command and exit code
system ('dir');
print qq(ERR Code = $?\n);
# UN-successful command and exit code
system ('dri');
print qq(ERR Code = $?\n);

[download]
Note, ERRORLEVEL is a "special" Windows environment variable:

C:> set /?
[...]
If Command Extensions are enabled, then there are several dynamic envi
+ronment variables that can be expanded but which don't show up in the
+ list of variables displayed by SET.  These variable values are compu
+ted dynamically each time the value of the variable is expanded. If t
+he user explicitly defines a variable with one of these names, then
that definition will override the dynamic one described below:

%CD% - expands to the current directory string.

%DATE% - expands to current date using same format as DATE command.

%TIME% - expands to current time using same format as TIME command.

%RANDOM% - expands to a random decimal number between 0 and 32767.

%ERRORLEVEL% - expands to the current ERRORLEVEL value

%CMDEXTVERSION% - expands to the current Command Processor Extensions 
+version number.

%CMDCMDLINE% - expands to the original command line that invoked the C
+ommand Processor.

[download]
You can try to get around this. Are you using pl2bat to get your Perl scripts to run on Windows? Just edit the resulting batch script to include a conditional:

if %ERRORLEVEL% 2 perl -x -S %0 %*

[download]
Where '2' above is the desired ERRORLEVEL, or use 'if NOT %ERRORLEVLE% ...' to get the opposite effect.

What launches your Perl script? Is it a batch file? What is the command that's running before it? Perhaps there is a way to include the conditional check for the ERRORLEVEL in that "thing" that launches your Perl script.

In reply to Re: access to ERRORLEVEL on Win32 by VinsWorldcom
in thread access to ERRORLEVEL on Win32 by gkraus

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.