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/*

 * Copyright (c) 2009, Kohsuke Ohtani

 * All rights reserved.

 *

 * 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 author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.

 */

/*

 * exec_script.c - Script file loader

 */

#include <sys/prex.h>

#include <ipc/fs.h>

#include <ipc/proc.h>

#include <sys/param.h>

#include <string.h>

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

#include <errno.h>

#include "exec.h"

static char interp[PATH_MAX];                /* interpreter name */

static char intarg[LINE_MAX];                /* argument to interpreter */

static char script[LINE_MAX];                /* script name */

/*

 * Load script file

 */

int

script_load(struct exec *exec)

{

        return 0;

}

/*

 * Probe script file

 */

int

script_probe(struct exec *exec)

{

        char *hdrstr = exec->header;

        char *p, *name;

        /* Check magic header */

        if ((hdrstr[0] != '#') || (hdrstr[1] != '!'))

                return PROBE_ERROR;

        /* Strip spaces before the interpriter name */

        for (p = hdrstr + 2; *p == ' ' || *p == '\t'; p++)

                ;

        if (*p == '\0')

                return PROBE_ERROR;

        DPRINTF(("script_probe: found\n"));

        /* Pick up interpreter name */

        name = p;

        for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)

                ;

        *p++ = '\0';

        if (!strncmp(name, "/bin/sh", PATH_MAX)) {

                strlcpy(interp, "/boot/cmdbox", sizeof(interp));

                strlcpy(intarg, "sh", sizeof(intarg));

                exec->xarg1 = intarg;

                exec->xarg2 = script;

        } else {

                strlcpy(interp, name, sizeof(interp));

                exec->xarg1 = intarg;

                exec->xarg2 = NULL;

        }

        strlcpy(script, exec->path, sizeof(script));

        exec->path = interp;

        DPRINTF(("script_probe: interpreter=%s arg=%s script=%s\n",

                 interp, intarg, script));

        return PROBE_INDIRECT;

}

void

script_init(void)

{

}