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/*****
** ** Module Header ******************************************************* **
** **
** Modules Revision 3.0 **
** Providing a flexible user environment **
** **
** File: cmdMisc.c **
** First Edition: 1991/10/23 **
** **
** Authors: John Furlan, jlf@behere.com **
** Jens Hamisch, jens@Strawberry.COM **
** **
** Description: The Tcl 'system' command **
** **
** Exports: cmdSystem **
** **
** Notes: The Following code was written by Don Libes, NIST **
** It was taken from his tool, 'expect' ... **
** I have edited parts of it... **
** **
** ************************************************************************ **
****/
/** ** Copyright *********************************************************** **
** **
** Copyright 1991-1994 by John L. Furlan. **
** see LICENSE.GPL, which must be provided, for details **
** **
** ************************************************************************ **/
static char Id[] = "@(#)$Id: cmdMisc.c,v 1.4.22.1 2010/11/11 18:23:18 rkowen Exp $";
static void *UseId[] = { &UseId, Id };
/** ************************************************************************ **/
/** HEADERS **/
/** ************************************************************************ **/
#include "modules_def.h"
/** ************************************************************************ **/
/** LOCAL DATATYPES **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** CONSTANTS **/
/** ************************************************************************ **/
#define MAX_ARGLIST 10240
/** ************************************************************************ **/
/** MACROS **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** LOCAL DATA **/
/** ************************************************************************ **/
static char module_name[] = "cmdMisc.c"; /** File name of this module **/
#if WITH_DEBUGGING_CALLBACK
static char _proc_cmdSystem[] = "cmdSystem";
#endif
/** ************************************************************************ **/
/** PROTOTYPES **/
/** ************************************************************************ **/
/** not applicable **/
/*++++
** ** Function-Header ***************************************************** **
** **
** Function: cmdSystem **
** **
** Description: Callback function for 'system' **
** **
** First Edition: 1991/10/23 **
** **
** Parameters: ClientData client_data **
** Tcl_Interp *interp According Tcl interp.**
** int argc Number of arguments **
** char *argv[] Argument array **
** **
** Result: int TCL_OK Successful completion **
** TCL_ERROR Any error **
** **
** Attached Globals: g_flags These are set up accordingly before **
** this function is called in order to **
** control everything **
** **
** ************************************************************************ **
++++*/
int cmdSystem( ClientData clientData,
Tcl_Interp *interp,
int argc,
CONST84 char *argv[])
{
int i;
int saved_stdout;
char buf[ MAX_ARGLIST];
char *bufp = buf;
int total_len = 0,
arg_len;
#if WITH_DEBUGGING_CALLBACK
ErrorLogger( NO_ERR_START, LOC, _proc_cmdSystem, NULL);
#endif
/**
** Whatis mode
**/
if( g_flags & (M_WHATIS | M_HELP))
return( TCL_OK); /** -------- EXIT (SUCCESS) -------> **/
/**
** Display mode?
**/
if( g_flags & M_DISPLAY) {
fprintf( stderr, "%s\t\t ", argv[ 0]);
for( i=1; i<argc; i++)
fprintf( stderr, "%s ", argv[ i]);
fprintf( stderr, "\n");
return( TCL_OK); /** ------- EXIT PROCEDURE -------> **/
}
/**
** Prepare a buffer to hold the complete 'system' call
** Watch over the commands complete length while copying ...
**/
for( i = 1; i<argc; i++) {
total_len += (1 + (arg_len = strlen(argv[i])));
if( total_len > MAX_ARGLIST) {
if( OK != ErrorLogger( ERR_ARGSTOLONG, LOC, argv[0], (sprintf( buf,
"%d", total_len), buf), NULL))
return( TCL_ERROR); /** -------- EXIT (FAILURE) -------> **/
}
/**
** Copy the argument ov the buffer and put a space at its end
**/
memcpy( bufp, argv[i], arg_len);
bufp += arg_len;
memcpy( bufp, " ", 1);
bufp += 1;
}
/**
** For Modules, stdout must be directed to stderr so it
** isn't parsed by the evaluating shell. We also must save it here so it
** can be restored after this command has been executed.
**/
saved_stdout = TieStdout();
*(bufp-1) = '\0';
i = system( buf);
/**
** Following the style of Tcl_ExecCmd, we can just return the
** raw result (appropriately shifted and masked) to Tcl
**/
sprintf( buf, "%d", (0xff & (i >> 8)));
Tcl_SetResult( interp, buf, TCL_VOLATILE);
/*
* Restore stdout.
*/
UnTieStdout( saved_stdout);
#if WITH_DEBUGGING_CALLBACK
ErrorLogger( NO_ERR_END, LOC, _proc_cmdSystem, NULL);
#endif
return( TCL_OK);
} /** End of 'cmdSystem' **/
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