04-08-2007
Pass argument to function
Hi,
Can someone please explain to me how I can get a function to recognize a file given as an argument to a script.
Suppose the script has the argument as follows:
sh script file
and the function is as follows:
function display_file () {
cat $1
}
and it s then called
#main program
display_file
I find that the only way that I can get the file into the function is to make a copy in the main program like so:
cp $1 temp
I have read some lit on functions but haven't come accross this type of problem as far.
Thanks in advance,
Knotty.
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Tk_Main(3) Tk Library Procedures Tk_Main(3)
__________________________________________________________________________________________________________________________________________________
NAME
Tk_Main - main program for Tk-based applications
SYNOPSIS
#include <tk.h>
Tk_Main(argc, argv, appInitProc)
ARGUMENTS
int argc (in) Number of elements in argv.
char *argv[] (in) Array of strings containing command-line arguments.
Tcl_AppInitProc *appInitProc (in) Address of an application-specific initialization procedure. The value for this argument is
usually Tcl_AppInit.
_________________________________________________________________
DESCRIPTION
Tk_Main acts as the main program for most Tk-based applications. Starting with Tk 4.0 it is not called main anymore because it is part of
the Tk library and having a function main in a library (particularly a shared library) causes problems on many systems. Having main in the
Tk library would also make it hard to use Tk in C++ programs, since C++ programs must have special C++ main functions.
Normally each application contains a small main function that does nothing but invoke Tk_Main. Tk_Main then does all the work of creating
and running a wish-like application.
When it is has finished its own initialization, but before it processes commands, Tk_Main calls the procedure given by the appInitProc
argument. This procedure provides a "hook" for the application to perform its own initialization, such as defining application-specific
commands. The procedure must have an interface that matches the type Tcl_AppInitProc:
typedef int Tcl_AppInitProc(Tcl_Interp *interp);
AppInitProc is almost always a pointer to Tcl_AppInit; for more details on this procedure, see the documentation for Tcl_AppInit.
KEYWORDS
application-specific initialization, command-line arguments, main program
Tk 4.0 Tk_Main(3)