Tcl_FindExecutable(3) Tcl Library Procedures Tcl_FindExecutable(3) 







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








#include <tcl.h>

void
Tcl_FindExecutable(argv0)

const char *
Tcl_GetNameOfExecutable()









  
char *argv0 (in)

  
The first command-line argument to the program, which gives the
      application's name.
    
    

    

  










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.


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.










binary, executable file







  

    8.1
    Tcl