mongodb/db/commands.cpp

/* commands.cpp
   db "commands" (sent via db.$cmd.findOne(...))
 */

/**
*
*    This program is free software: you can redistribute it and/or  modify
*    it under the terms of the GNU Affero General Public License, version 3,
*    as published by the Free Software Foundation.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU Affero General Public License for more details.
*
*    You should have received a copy of the GNU Affero General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "stdafx.h"
#include "jsobj.h"
#include "commands.h"

map<string,Command*> *commands;

Command::Command(const char *_name) : name(_name) {
    // register ourself.
    if ( commands == 0 )
        commands = new map<string,Command*>;
    (*commands)[name] = this;
}

bool runCommandAgainstRegistered(const char *ns, BSONObj& jsobj, BSONObjBuilder& anObjBuilder) {
    const char *p = strchr(ns, '.');
    if ( !p ) return false;
    if ( strcmp(p, ".$cmd") != 0 ) return false;

    bool ok = false;
    bool valid = false;

    BSONElement e;
    e = jsobj.firstElement();

    map<string,Command*>::iterator i;

    if ( e.eoo() )
        ;
    /* check for properly registered command objects.  Note that all the commands below should be
       migrated over to the command object format.
       */
    else if ( (i = commands->find(e.fieldName())) != commands->end() ) {
        valid = true;
        string errmsg;
        Command *c = i->second;
        if ( c->adminOnly() && strncmp(ns, "admin", p-ns) != 0 ) {
            ok = false;
            errmsg = "access denied";
        }
        else {
            ok = c->run(ns, jsobj, errmsg, anObjBuilder, false);
        }
        if ( !ok )
            anObjBuilder.append("errmsg", errmsg);
        return true;
    }

    return false;
}