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<HTML><HEAD><TITLE>Tcl Library Procedures - Tcl_FindExecutable manual page</TITLE></HEAD><BODY>
<H3><A NAME="M2">NAME</A></H3>
Tcl_FindExecutable - identify the binary file containing the application
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>#include &lt;tcl.h&gt;</B><BR>
char *<BR>
<B>Tcl_FindExecutable</B>(<I>argv0</I>)<BR>
<H3><A NAME="M4">ARGUMENTS</A></H3>
<DL>
<P><DT>char <B>*argv0</B> (in)<DD>
The first command-line argument to the program, which gives the
application's name.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
This procedure computes the full path name of the executable file
from which the application was invoked and saves it for Tcl's
internal use.
The executable's path name is needed for several purposes in
Tcl.  For example, it is needed on some platforms in the
implementation of the <B><A HREF="../TclCmd/load.htm">load</A></B> command.
It is also returned by the <B><A HREF="../TclCmd/info.htm">info nameofexecutable</A></B> command.
<P>
On UNIX platforms this procedure is typically invoked as the very
first thing in the application's main program;  it must be passed
<I>argv[0]</I> as its argument.  <B>Tcl_FindExecutable</B> uses <I>argv0</I>
along with the <B>PATH</B> environment variable to find the
application's executable, if possible.  If it fails to find
the binary, then future calls to <B><A HREF="../TclCmd/info.htm">info nameofexecutable</A></B>
will return an empty string.

<H3><A NAME="M6">KEYWORDS</A></H3>
<A href="../Keywords/B.htm#binary">binary</A>, <A href="../Keywords/E.htm#executable file">executable file</A>
<HR><PRE>
<A HREF="../copyright.htm">Copyright</A> &#169; 1995-1996 Sun Microsystems, Inc.
<A HREF="../copyright.htm">Copyright</A> &#169; 1995-1997 Roger E. Critchlow Jr.</PRE>
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