The solution is to store the last 5 lines visited in an array, and also have a variable tracking how many more lines beyond the current one have to be output:
$x = 5; # Number of lines to print above and below.
open (LOG, "GWSvc.log") || die "Unable to get a handle to the file: $!
+\n";
$after = 0;
while (<LOG>) {
if ($after) {
print $_; $after--;
}
else {
push (@lines, $_);
if ($#lines > $x) { shift(@lines); }
}
if (/c9391b56-b174-441b-921c-7d63/) {
print $line while ($line = shift(@lines));
$after = $x;
}
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|