/* $NetBSD: checkrc.c,v 1.3 2021/01/31 22:45:46 rillig Exp $ */

/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jeffrey C. Rizzo
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/

/* checkrc.c -- Create a script on the target to check the state of
* its rc.conf variables. */

#include <curses.h>
#include <err.h>
#include <stdio.h>
#include "defs.h"
#include "msg_defs.h"
#include "menu_defs.h"

#define RC_CHECK_SCRIPT "/tmp/checkrc.sh"

static int create_script(const char *, int);
static int check(const char *, int);

char *rcconf = NULL;

enum {
       CHECK_CONF,
       CHECK_DEFAULT
};

static int
create_script(const char *varname, int filetocheck)
{
       FILE    *fp;

       if ((fp = fopen(target_expand(RC_CHECK_SCRIPT), "w")) == NULL) {
               if (logfp)
                       fprintf(logfp,"Could not open %s for writing",
                           target_expand(RC_CHECK_SCRIPT));
               warn("Could not open %s for writing",
                   target_expand(RC_CHECK_SCRIPT));
               return 1;
       }

       if (filetocheck == CHECK_DEFAULT)
               fprintf(fp, "#!/bin/sh\n. /etc/defaults/rc.conf\n"
                   ". /etc/rc.subr\n");
       else
               fprintf(fp, "#!/bin/sh\n. /etc/rc.conf\n. /etc/rc.subr\n");
       fprintf(fp, "if checkyesno %s\nthen\necho YES\nelse\necho NO\nfi\n",
           varname);

       fclose(fp);
       return 0;
}

static int
check(const char *varname, int filetocheck)
{
       char *buf;
       int rv;

       create_script(varname, filetocheck);

       if (target_already_root())
               collect(T_OUTPUT, &buf, "/bin/sh %s 2>&1", RC_CHECK_SCRIPT);
       else
               collect(T_OUTPUT, &buf, "chroot %s /bin/sh %s 2>&1",
                               target_prefix(), RC_CHECK_SCRIPT);


       unlink(target_expand(RC_CHECK_SCRIPT));

       if (logfp) {
               fprintf(logfp,"var %s is %s\n", varname, buf);
               fflush(logfp);
       }

       rv = strncmp(buf, "YES", strlen("YES")) == 0;
       free(buf);
       return rv;
}

int
check_rcvar(const char *varname)
{
       return check(varname, CHECK_CONF);
}

int
check_rcdefault(const char *varname)
{
       return check(varname, CHECK_DEFAULT);
}