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Tcl_FindExecutable(3)	    Tcl Library Procedures	 Tcl_FindExecutable(3)

______________________________________________________________________________

NAME
       Tcl_FindExecutable,  Tcl_GetNameOfExecutable  -	identify or return the
       name of the binary file containing the application

SYNOPSIS
       #include <tcl.h>

       char *
       Tcl_FindExecutable(argv0)

       CONST char *
       Tcl_GetNameOfExecutable()

ARGUMENTS
       char   *argv0   (in)	 The first command-line argument to  the  pro‐
				 gram, which gives the application's name.
_________________________________________________________________

DESCRIPTION
       The  Tcl_FindExecutable	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	load command.  It is also returned by the info
       nameofexecutable command.

       On UNIX platforms this procedure is typically invoked as the very first
       thing  in the application's main program;  it must be passed argv[0] as
       its argument.  Tcl_FindExecutable uses argv0 along with the PATH	 envi‐
       ronment variable to find the application's executable, if possible.  If
       it fails to find the binary, then future calls to info nameofexecutable
       will return an empty string.

       Tcl_GetNameOfExecutable	simply	returns a pointer to the internal full
       path name of the executable file	 as  computed  by  Tcl_FindExecutable.
       This  procedure	call  is  the  C API equivalent to the info nameofexe‐
       cutable command.	 NULL is returned if the internal full path  name  has
       not been computed or unknown.

KEYWORDS
       binary, executable file

Tcl				      7.5		 Tcl_FindExecutable(3)
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