External and mémory

[Jean-Pierre]

Do I have to free retstring after calling an external ?

Is there something wrong in this code. Memory grow up slowly ...

XRev_codphone(char* args[],int nargs,char ** retstring,bool  
*Pass,bool *Error){

	*pass=False ; *Error=False ; *retstring=(char *)malloc (100);

	if (nargs==1){

		sprintf (*retstring,"%s %s",codePhone(args[0]),phoneComment);

	}    else  strcpy(*retstring,"Rev_codePhone : Erreur nombre  
d'argument incorrect");


}