/*
 * Copyright (c) 2012 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``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
 * COPYRIGHT HOLDERS OR CONTRIBUTORS 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 "hammer.h"

#define REMOTE_MAXARGS  256

/*
 * Execute SSH_ORIGINAL_COMMAND if it matches
 */
void
hammer_cmd_sshremote(const char *cmd, const char *target)
{
        char *env, *str, *dup;
        const char *av[REMOTE_MAXARGS + 1];
        int ac;

        if ((env = getenv("SSH_ORIGINAL_COMMAND")) == NULL) {
                errx(1, "SSH_ORIGINAL_COMMAND env missing");
                /* not reached */
        }

        dup = env = strdup(env);
        av[0] = "hammer";
        av[1] = "-R";
        av[2] = cmd;
        av[3] = "-T";
        av[4] = target;
        ac = 5;

        str = strsep(&env, " \t\r\n");
        if (str == NULL) {
                errx(1, "hammer-remote: null command");
                /* not reached */
        }

        if (strstr(str, "hammer") == NULL) {
                errx(1, "hammer-remote: Command not 'hammer'");
                /* not reached */
        }

        while (ac < REMOTE_MAXARGS) {
                av[ac] = strsep(&env, " \t\r\n");
                ++ac;
                if (av[ac - 1] == NULL)
                        break;
        }
        free(dup);
        execv("/sbin/hammer", (void *)av);
        err(1, "hammer-remote: execv failed");
        /* not reached */
}