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
44static int create_script(const char *, int);
45static int check(const char *, int);
46
47char *rcconf = NULL;
48
49enum {
50	CHECK_CONF,
51	CHECK_DEFAULT
52};
53
54static int
55create_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
80static int
81check(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
107int
108check_rcvar(const char *varname)
109{
110	return check(varname, CHECK_CONF);
111}
112
113int
114check_rcdefault(const char *varname)
115{
116	return check(varname, CHECK_DEFAULT);
117}
118