NAME

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

SYNOPSIS

       #include <tcl.h>

       void
       Tcl_FindExecutable(argv0)

       const char *
       Tcl_GetNameOfExecutable()

ARGUMENTS

       char *argv0 (in)          The first command-line argument to the program, which gives  the  application's
                                 name.
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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.  It is important not to change the working directory
       before  the  invocation.   Tcl_FindExecutable uses argv0 along with the PATH environment 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.

       On  Windows  platforms  this  procedure is typically invoked as the very first thing in the application's
       main program as well; Its argv[0] argument is only used to indicate whether the executable has  a  stderr
       channel (any non-null value) or not (the value null). If Tcl_SetPanicProc is never called and no debugger
       is running, this determines whether the panic message is sent to stderr or to a standard system dialog.

       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 nameofexecutable
       command.  NULL is returned if the internal full path name has not been computed or unknown.

KEYWORDS

       binary, executable file

Tcl                                                    8.1                              Tcl_FindExecutable(3tcl)