source: mainline/uspace/app/bdsh/cmds/modules/echo/echo.c

/*
 * Copyright (c) 2012 Alexander Prutkov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include "config.h"
#include "util.h"
#include "errors.h"
#include "entry.h"
#include "echo.h"
#include "cmds.h"
#include "errno.h"

static const char *cmdname = "echo";

void help_cmd_echo(unsigned int level)
{
        if (level == HELP_SHORT) {
                printf("`%s' prints arguments as they are, followed by a new line.\n", cmdname);
        } else {
                help_cmd_echo(HELP_SHORT);
                printf("Usage:  %s [arg ...]\n", cmdname);
        }

        return;
}

/* Main entry point for echo, accepts an array of arguments */
int cmd_echo(char **argv)
{
        unsigned int argc;

        for (argc = 1; argv[argc] != NULL; argc++) {
                printf("%s ", argv[argc]);
        }
        printf("\n");
        return CMD_SUCCESS;

}