Tcl_FindExecutable, Tcl_GetNameOfExecutable - identify or
return the name of the binary file containing the applica
CONST char *
char *argv0 (in) The first command-line argument
to the program, which gives the
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 exe
cutable's path name is needed for several purposes in Tcl.
For example, it is needed on some platforms in the imple
mentation 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 as its argument. Tcl_FindExe
cutable uses argv0 along with the PATH environment vari
able 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 com
puted or unknown.
binary, executable file