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+<head>
+<title>UK TeX FAQ -- question label compjobnam</title>
+</head><body>
+<h3>Comparing the "job name"</h3>
+<p>The token <code>\</code><code>jobname</code> amusingly produces a sequence of characters
+whose category code is 12 ('other'), regardless of what the characters
+actually are. Since one inevitably has to compare a macro with the
+contents of another macro (using <code>\</code><code>ifx</code>, somewhere) one needs to
+create a macro whose expansion looks the same as the expansion of
+<code>\</code><code>jobname</code>. We find we can do this with <code>\</code><code>meaning</code>, if we strip
+the "<code>\</code><code>show</code> command" prefix.
+<p>The full command looks like:
+<blockquote>
+<pre>
+\def\StripPrefix#1&gt;{}
+\def\jobis#1{FF\fi
+ \def\predicate{#1}%
+ \edef\predicate{\expandafter\StripPrefix\meaning\predicate}%
+ \edef\job{\jobname}%
+ \ifx\job\predicate
+}
+</pre>
+
+</blockquote>
+And it's used as:
+<blockquote>
+<pre>
+\if\jobis{mainfile}%
+ \message{YES}%
+\else
+ \message{NO}%
+\fi
+</pre>
+</blockquote>
+Note that the command <code>\</code><code>StripPrefix</code> need not be defined if you're
+using LaTeX - there's already an
+<a href="FAQ-atsigns.html">internal command</a> <code>\</code><code>strip@prefix</code> that you can
+use.
+<p><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=compjobnam">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=compjobnam</a>
+</body>