midpplatformimpl.cpp

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/*
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, 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
 * General Public License version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 * 
 * This source file is specific for Qt-based configurations.
 */

#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <midp_properties_port.h>
#include <midlet.h>
#include <midp_logging.h>

/**
 * @file
 *
 * Platform implementation of the platformRequest() method call.
 */

/** Property name for platform request handler */
static const char* const PLATFORM_REQUEST_KEY =
    "com.sun.midp.midlet.platformRequestCommand";

/**
 * Starts a new process to handle the given URL. The new process executes
 * the value of the <tt>com.sun.midp.midlet.platformRequestCommand</tt>
 * system property. The URL is passed as this process' sole command-line
 * argument.
 *
 * @param pszUrl The 'C' string URL
 *
 * @return true if the platform request is configured
 */
extern "C" int
platformRequest(char* pszUrl) {
    char *execargs[3];
    pid_t pid;

    if (strlen(pszUrl) == 0) {
        /*
         * This is a request to cancel. Since a process was already spawned
         * to handle the previous URL, it too late.
         */
        return 1;
    }

    execargs[0] = (char *)getInternalProperty(PLATFORM_REQUEST_KEY);
    if (execargs[0] == NULL) {
        REPORT_INFO(LC_CORE, "PlatformRequest is not configured.");
	return 0;
    }

    execargs[1] = pszUrl;
    execargs[2] = NULL;

    pid = fork();
    if (pid == 0) {
	/*
         * Child process, can throw an exception from this process.
         *  just display the error to the developer.
         */
        if (execvp(execargs[0], execargs) == -1) {
	    REPORT_INFO(LC_CORE, "Spawning a handler process failed.  "
                        "Check the platformRequest configuration.");
	    _exit(0);
	}
    } else if (pid == -1){
        /* Error */
        REPORT_ERROR(LC_CORE, "[midpPlatformImpl.cpp]-fork failed for"
                     " platformRequest");
    }

    return 1;
}