int ModuleCmd_Switch( Tcl_Interp *interp,
int argc,
char *argv[])
{
char *oldmodule,
*newmodule,
*realname,
*oldfile,
*newfile,
*oldname,
*newname,
*oldmodule_buffer = (char *) NULL;
int ret_val = TCL_OK;
/**
** allocate buffer memory
**/
if (!(oldfile = stringer(NULL, MOD_BUFSIZE, NULL)))
if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
goto unwind0;
if (!(newfile = stringer(NULL, MOD_BUFSIZE, NULL)))
if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
goto unwind1;
if (!(oldname = stringer(NULL, MOD_BUFSIZE, NULL)))
if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
goto unwind2;
if (!(newname = stringer(NULL, MOD_BUFSIZE, NULL)))
if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
goto unwind3;
/**
** Parameter check. the required syntax is:
** module switch [ <old> ] <new>
** If <old> is not specified, then the pathname of <new> is assumed.
**/
if( argc == 1) {
newmodule = argv[0];
if(!(oldmodule_buffer = stringer(NULL,0,newmodule,NULL)))
if( OK != ErrorLogger( ERR_STRING, LOC, NULL))
goto unwind4;
/* starting from the end of the module name, find the first
* forward slash and replace with null
*/
if ((oldmodule = strrchr(oldmodule_buffer, *psep))) {
*oldmodule = 0;
}
oldmodule = oldmodule_buffer;
} else if( argc == 2) {
oldmodule = argv[0];
newmodule = argv[1];
} else {
if( OK != ErrorLogger( ERR_USAGE, LOC, "switch oldmodule newmodule",
NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
}
/**
** Set the name of the module specified on the command line
**/
g_specified_module = oldmodule;
/**
** First try to find a match for the modulefile out of the LOADEDMODULES.
**/
if( !IsLoaded( interp, oldmodule, &realname, oldfile))
if( OK != ErrorLogger( ERR_NOTLOADED, LOC, oldmodule, NULL))
goto unwind4;
/**
** If we have another name to try, try finding it on disk.
**/
if( realname)
ret_val = Locate_ModuleFile( interp, realname, oldname, oldfile);
/**
** If we've made it this far without finding a file, then look using the
** exact name the user gave me -- i.e. the old method.
**/
if( ret_val == TCL_ERROR) {
if( TCL_ERROR == (ret_val = Locate_ModuleFile( interp, oldmodule,
oldname, oldfile)))
if( OK != ErrorLogger( ERR_LOCATE, LOC, oldmodule, NULL))
goto unwind4;
/**
** OK, this one is known. Is it loaded, too?
**/
if( !IsLoaded( interp, oldname, NULL, oldfile))
if( OK != ErrorLogger( ERR_NOTLOADED, LOC, oldmodule, NULL))
goto unwind4;
}
/**
** Set the name of the module specified on the command line
**/
g_specified_module = newmodule;
/**
** Now try to find the new file to swap with.
**/
if( TCL_ERROR == (ret_val = Locate_ModuleFile( interp, newmodule, newname,
newfile)))
if( OK != ErrorLogger( ERR_LOCATE, LOC, newmodule, NULL))
goto unwind4;
ErrorLogger( NO_ERR_VERBOSE, LOC, "Switching '$1' to '$2'", oldmodule,
newmodule, NULL);
/**
** We'll remove the current modulefile with the SWITCH1 state set.
** This means that instead of really removing the paths, markers will
** be put in its place for later use.
**/
g_flags |= (M_REMOVE | M_SWSTATE1);
g_specified_module = oldmodule;
g_current_module = oldname;
if( Read_Modulefile( interp, oldfile) == 0)
Update_LoadedList( interp, oldname, oldfile);
else {
ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
goto unwind4;
}
g_flags &= ~(M_REMOVE | M_SWSTATE1);
/**
** Move on to state SWITCH2. This loads the modulefile at the append
** and prepend markers.
**/
g_flags |= M_SWSTATE2;
g_specified_module = newmodule;
g_current_module = newname;
if( Read_Modulefile( interp, newfile) == 0)
Update_LoadedList( interp, newname, newfile);
else {
ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
goto unwind4;
}
g_flags &= ~M_SWSTATE2;
/**
** This actually unsets environment variables and gets rid of the
** markers.
**/
g_flags |= (M_REMOVE | M_SWSTATE3);
g_specified_module = oldmodule;
g_current_module = oldname;
if( Read_Modulefile( interp, oldfile) == 0)
Update_LoadedList( interp, newname, newfile);
else {
ErrorLogger( NO_ERR_VERBOSE, LOC, "failed", NULL);
goto unwind4;
}
/**
** Return on success
**/
ErrorLogger( NO_ERR_VERBOSE, LOC, "done", NULL);
/**
** free space
** assume don't need what's pointed to by g_current_module
** and g_specified_module
**/
null_free((void *) &newname);
null_free((void *) &oldname);
null_free((void *) &newfile);
null_free((void *) &oldfile);
return( TCL_OK); /** ------- EXIT (SUCCESS) --------> **/
unwind4:
if (oldmodule == oldmodule_buffer)
null_free((void *) &oldmodule);
null_free((void *) &newname);
unwind3:
null_free((void *) &oldname);
unwind2:
null_free((void *) &newfile);
unwind1:
null_free((void *) &oldfile);
unwind0:
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
} /** End of 'ModuleCmd_Switch' **/
int CallModuleProcedure( Tcl_Interp *interp,
Tcl_DString *cmdptr,
char *modulefile,
char *procname,
int suppress_output)
{
char cmdline[ LINELENGTH];
char *cmd;
int result;
int saved_stdout = 0, saved_stderr = 0, devnull;
#if WITH_DEBUGGING_UTIL_1
ErrorLogger( NO_ERR_START, LOC, _proc_CallModuleProcedure, NULL);
#endif
/**
** Must send stdout and stderr to /dev/null until the
** ModulesHelp procedure is called.
**/
if( suppress_output) {
if( 0 > (devnull = open( _fil_devnull, O_RDWR))) {
if( OK != ErrorLogger( ERR_OPEN, LOC, _fil_devnull, "changing", NULL))
return( TCL_ERROR); /** -------- EXIT (FAILURE) -------> **/
}
/**
** Close STDOUT and reopen it as /dev/null
**/
if( -1 == ( saved_stdout = dup( 1)))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_stdout, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == close( 1))
if( OK != ErrorLogger( ERR_CLOSE, LOC, _fil_stdout, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == dup( devnull))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_devnull, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
/**
** Close STDERR and reopen it as /dev/null
**/
if( -1 == ( saved_stdout = dup( 2)))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_stderr, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == close( 2))
if( OK != ErrorLogger( ERR_CLOSE, LOC, _fil_stderr, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == dup( devnull))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_devnull, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
}
/**
** Read the passed module file
**/
Read_Modulefile( interp, modulefile);
/**
** Reinstall stdout and stderr
**/
if( suppress_output) {
/**
** Reinstall STDOUT
**/
if( EOF == fflush( stdout))
if( OK != ErrorLogger( ERR_FLUSH, LOC, _fil_stdout, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( EOF == fflush( stderr))
if( OK != ErrorLogger( ERR_FLUSH, LOC, _fil_stderr, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == close( 1))
if( OK != ErrorLogger( ERR_CLOSE, LOC, _fil_stdout, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
/**
** Reinstall STDERR
**/
if( -1 == dup( saved_stdout))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_stdout, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == close( 2))
if( OK != ErrorLogger( ERR_CLOSE, LOC, _fil_stderr, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
if( -1 == dup( saved_stderr))
if( OK != ErrorLogger( ERR_DUP, LOC, _fil_stderr, NULL))
return( TCL_ERROR); /** ------- EXIT (FAILURE) --------> **/
}
/**
** Now evaluate the Tcl Procedure
**/
/* sprintf( cmdline, "%s\n", procname); */
strcpy( cmdline, procname);
strcat( cmdline, "\n");
cmd = Tcl_DStringAppend( cmdptr, cmdline, (-1));
result = Tcl_Eval( interp, cmd);
Tcl_DStringTrunc( cmdptr, 0);
#if WITH_DEBUGGING_UTIL_1
ErrorLogger( NO_ERR_END, LOC, _proc_CallModuleProcedure, NULL);
#endif
return( result);
} /** End of 'CallModuleProcedure' **/