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cmdIsLoaded.c
184 lines (147 loc) · 5.96 KB
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cmdIsLoaded.c
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/*****
** ** Module Header ******************************************************* **
** **
** Modules Revision 3.0 **
** Providing a flexible user environment **
** **
** File: cmdIsLoaded.c **
** First Edition: 2000/04/12 **
** **
** Description: The Tcl conflict and prereq commands. **
** **
** Exports: cmdIsLoaded **
** **
** Notes: **
** **
** ************************************************************************ **
****/
/** ** Copyright *********************************************************** **
** **
** Copyright 1991-1994 by John L. Furlan. **
** see LICENSE.GPL, which must be provided, for details **
** **
** ************************************************************************ **/
static char Id[] = "@(#)$Id: cmdIsLoaded.c,v 1.6.20.1 2010/11/11 18:23:18 rkowen Exp $";
static void *UseId[] = { &UseId, Id };
/** ************************************************************************ **/
/** HEADERS **/
/** ************************************************************************ **/
#include "modules_def.h"
/** ************************************************************************ **/
/** LOCAL DATATYPES **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** CONSTANTS **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** MACROS **/
/** ************************************************************************ **/
/** not applicable **/
/** ************************************************************************ **/
/** LOCAL DATA **/
/** ************************************************************************ **/
static char module_name[] = "cmdIsLoaded.c"; /** File name of this module **/
#if WITH_DEBUGGING_CALLBACK
static char _proc_cmdIsLoaded[] = "cmdIsLoaded";
#endif
/** ************************************************************************ **/
/** PROTOTYPES **/
/** ************************************************************************ **/
/*++++
** ** Function-Header ***************************************************** **
** **
** Function: cmdIsLoaded **
** **
** Description: Callback function for 'is-loaded' **
** **
** First Edition: 2000/04/12 **
** **
** 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 cmdIsLoaded( ClientData client_data,
Tcl_Interp *interp,
int argc,
CONST84 char *argv[])
{
char **pathlist;
char **modulelist;
char *modulepath;
char *notloaded_flag = (char *) argv[1];
int i, j, k, numpaths, nummodules;
#if WITH_DEBUGGING_CALLBACK
ErrorLogger( NO_ERR_START, LOC, _proc_cmdIsLoaded, NULL);
#endif
/**
** Parameter check. Usage is 'is-loaded <module> [<module> ...]'
**/
if( argc < 2) {
if( OK != ErrorLogger( ERR_USAGE, LOC, argv[0], "is-loaded-modules", NULL))
return( TCL_ERROR); /** -------- EXIT (FAILURE) -------> **/
}
/**
** There's no prerequisite check in case of whatis
**/
if( g_flags & M_WHATIS)
return( TCL_OK); /** -------- EXIT (SUCCESS) -------> **/
/**
** Load the MODULEPATH and split it into a list of paths
**/
if( !(modulepath = (char *) getenv( "MODULEPATH"))) {
if( OK != ErrorLogger( ERR_MODULE_PATH, LOC, NULL))
return( TCL_ERROR); /** -------- EXIT (FAILURE) -------> **/
}
#if WITH_DEBUGGING_CALLBACK_1
ErrorLogger( NO_ERR_DEBUG, LOC, "Got modulepath: '", modulepath, "'", NULL);
#endif
if( !(pathlist = SplitIntoList( interp, modulepath, &numpaths, _colon)))
return( TCL_OK); /** -------- EXIT (SUCCESS) -------> **/
/**
** Check/Display all passed modules
**/
for( i=1; i<argc && argv[i] && notloaded_flag; i++) {
for( j = 0; j < numpaths && notloaded_flag; j++) {
if( NULL == (modulelist = SortedDirList( interp, pathlist[j],
(char *) argv[i], &nummodules)))
continue;
/**
** Now actually check if the prerequisites are fullfilled
** The notloaded_flag controls the exit from both loops in case
** a prerequisite is missing.
**/
for( k=0; k < nummodules && notloaded_flag; k++) {
if( !IsLoaded( interp, modulelist[k], NULL, NULL)) {
notloaded_flag = (char *) argv[i];
} else {
notloaded_flag = NULL;
}
}
/**
** Free what has been allocted in the loop
**/
FreeList( modulelist, nummodules);
} /** for( j) **/
} /** for( i) **/
/**
** Display an error message if this was *NOT* display mode and a
** missing prerequisite has been found
**/
Tcl_SetResult( interp, notloaded_flag ? "0" : "1", TCL_STATIC);
#if WITH_DEBUGGING_CALLBACK
ErrorLogger( NO_ERR_END, LOC, _proc_cmdIsLoaded, NULL);
#endif
return( TCL_OK);
} /** End of 'cmdIsLoaded' **/