Home | History | Annotate | Line # | Download | only in sysinst 
      1 /* $NetBSD: checkrc.c,v 1.3 2021/01/31 22:45:46 rillig Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jeffrey C. Rizzo
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /* checkrc.c -- Create a script on the target to check the state of
     33  * its rc.conf variables. */
     34 
     35 #include <curses.h>
     36 #include <err.h>
     37 #include <stdio.h>
     38 #include "defs.h"
     39 #include "msg_defs.h"
     40 #include "menu_defs.h"
     41 
     42 #define RC_CHECK_SCRIPT "/tmp/checkrc.sh"
     43 
     44 static int create_script(const char *, int);
     45 static int check(const char *, int);
     46 
     47 char *rcconf = NULL;
     48 
     49 enum {
     50 	CHECK_CONF,
     51 	CHECK_DEFAULT
     52 };
     53 
     54 static int
     55 create_script(const char *varname, int filetocheck)
     56 {
     57 	FILE	*fp;
     58 
     59 	if ((fp = fopen(target_expand(RC_CHECK_SCRIPT), "w")) == NULL) {
     60 		if (logfp)
     61 			fprintf(logfp,"Could not open %s for writing",
     62 			    target_expand(RC_CHECK_SCRIPT));
     63 		warn("Could not open %s for writing",
     64 		    target_expand(RC_CHECK_SCRIPT));
     65 		return 1;
     66 	}
     67 
     68 	if (filetocheck == CHECK_DEFAULT)
     69 		fprintf(fp, "#!/bin/sh\n. /etc/defaults/rc.conf\n"
     70 		    ". /etc/rc.subr\n");
     71 	else
     72 		fprintf(fp, "#!/bin/sh\n. /etc/rc.conf\n. /etc/rc.subr\n");
     73 	fprintf(fp, "if checkyesno %s\nthen\necho YES\nelse\necho NO\nfi\n",
     74 	    varname);
     75 
     76 	fclose(fp);
     77 	return 0;
     78 }
     79 
     80 static int
     81 check(const char *varname, int filetocheck)
     82 {
     83 	char *buf;
     84 	int rv;
     85 
     86 	create_script(varname, filetocheck);
     87 
     88 	if (target_already_root())
     89 		collect(T_OUTPUT, &buf, "/bin/sh %s 2>&1", RC_CHECK_SCRIPT);
     90 	else
     91 		collect(T_OUTPUT, &buf, "chroot %s /bin/sh %s 2>&1",
     92 				target_prefix(), RC_CHECK_SCRIPT);
     93 
     94 
     95 	unlink(target_expand(RC_CHECK_SCRIPT));
     96 
     97 	if (logfp) {
     98 		fprintf(logfp,"var %s is %s\n", varname, buf);
     99 		fflush(logfp);
    100 	}
    101 
    102 	rv = strncmp(buf, "YES", strlen("YES")) == 0;
    103 	free(buf);
    104 	return rv;
    105 }
    106 
    107 int
    108 check_rcvar(const char *varname)
    109 {
    110 	return check(varname, CHECK_CONF);
    111 }
    112 
    113 int
    114 check_rcdefault(const char *varname)
    115 {
    116 	return check(varname, CHECK_DEFAULT);
    117 }
    118