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scoutos / prex-0.9.0 / usr / server / exec / exec_script.c @ 03e9c04a

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/*
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 * Copyright (c) 2009, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * exec_script.c - Script file loader
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 */
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#include <sys/prex.h>
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#include <ipc/fs.h>
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#include <ipc/proc.h>
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#include <sys/param.h>
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#include <string.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "exec.h"
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static char interp[PATH_MAX];                /* interpreter name */
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static char intarg[LINE_MAX];                /* argument to interpreter */
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static char script[LINE_MAX];                /* script name */
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/*
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 * Load script file
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 */
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int
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script_load(struct exec *exec)
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{
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        return 0;
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}
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/*
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 * Probe script file
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 */
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int
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script_probe(struct exec *exec)
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{
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        char *hdrstr = exec->header;
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        char *p, *name;
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        /* Check magic header */
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        if ((hdrstr[0] != '#') || (hdrstr[1] != '!'))
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                return PROBE_ERROR;
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        /* Strip spaces before the interpriter name */
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        for (p = hdrstr + 2; *p == ' ' || *p == '\t'; p++)
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                ;
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        if (*p == '\0')
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                return PROBE_ERROR;
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        DPRINTF(("script_probe: found\n"));
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        /* Pick up interpreter name */
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        name = p;
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        for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
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                ;
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        *p++ = '\0';
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        if (!strncmp(name, "/bin/sh", PATH_MAX)) {
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                strlcpy(interp, "/boot/cmdbox", sizeof(interp));
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                strlcpy(intarg, "sh", sizeof(intarg));
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                exec->xarg1 = intarg;
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                exec->xarg2 = script;
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        } else {
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                strlcpy(interp, name, sizeof(interp));
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                exec->xarg1 = intarg;
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                exec->xarg2 = NULL;
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        }
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        strlcpy(script, exec->path, sizeof(script));
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        exec->path = interp;
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        DPRINTF(("script_probe: interpreter=%s arg=%s script=%s\n",
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                 interp, intarg, script));
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        return PROBE_INDIRECT;
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}
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void
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script_init(void)
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{
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}