xref: /netbsd-src/sbin/modstat/main.c (revision b1c86f5f087524e68db12794ee9c3e3da1ab17a0)
1 /*	$NetBSD: main.c,v 1.10 2010/03/19 16:25:33 pooka Exp $	*/
2 
3 /*-
4  * Copyright (c) 2008 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 #ifndef lint
31 __RCSID("$NetBSD: main.c,v 1.10 2010/03/19 16:25:33 pooka Exp $");
32 #endif /* !lint */
33 
34 #include <sys/module.h>
35 
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40 #include <err.h>
41 
42 int	main(int, char **);
43 static void	usage(void) __dead;
44 static int	modstatcmp(const void *, const void *);
45 
46 static const char *classes[] = {
47 	"any",
48 	"misc",
49 	"vfs",
50 	"driver",
51 	"exec",
52 	"secmodel",
53 };
54 const unsigned int class_max = __arraycount(classes);
55 
56 static const char *sources[] = {
57 	"builtin",
58 	"boot",
59 	"filesys",
60 };
61 const unsigned int source_max = __arraycount(sources);
62 
63 int
64 main(int argc, char **argv)
65 {
66 	struct iovec iov;
67 	modstat_t *ms;
68 	size_t len;
69 	const char *name;
70 	char sbuf[32];
71 	int ch;
72 
73 	name = NULL;
74 
75 	while ((ch = getopt(argc, argv, "n:")) != -1) {
76 		switch (ch) {
77 		case 'n':
78 			name = optarg;
79 			break;
80 		default:
81 			usage();
82 			/* NOTREACHED */
83 		}
84 	}
85 
86 	argc -= optind;
87 	argv += optind;
88 	if (argc != 0)
89 		usage();
90 
91 	for (len = 8192;;) {
92 		iov.iov_base = malloc(len);
93 		iov.iov_len = len;
94 		if (modctl(MODCTL_STAT, &iov)) {
95 			err(EXIT_FAILURE, "modctl(MODCTL_STAT)");
96 		}
97 		if (len >= iov.iov_len) {
98 			break;
99 		}
100 		free(iov.iov_base);
101 		len = iov.iov_len;
102 	}
103 
104 	printf("%-16s %-10s %-10s %-5s %-8s %s\n",
105 	    "NAME", "CLASS", "SOURCE", "REFS", "SIZE", "REQUIRES");
106 	len = iov.iov_len / sizeof(modstat_t);
107 	qsort(iov.iov_base, len, sizeof(modstat_t), modstatcmp);
108 	for (ms = iov.iov_base; len != 0; ms++, len--) {
109 		const char *class;
110 		const char *source;
111 
112 		if (name != NULL && strcmp(ms->ms_name, name) != 0) {
113 			continue;
114 		}
115 		if (ms->ms_required[0] == '\0') {
116 			ms->ms_required[0] = '-';
117 			ms->ms_required[1] = '\0';
118 		}
119 		if (ms->ms_size == 0) {
120 			sbuf[0] = '-';
121 			sbuf[1] = '\0';
122 		} else {
123 			snprintf(sbuf, sizeof(sbuf), "%u", ms->ms_size);
124 		}
125 		if (ms->ms_class <= class_max)
126 			class = classes[ms->ms_class];
127 		else
128 			class = "UNKNOWN";
129 		if (ms->ms_source < source_max)
130 			source = sources[ms->ms_source];
131 		else
132 			source = "UNKNOWN";
133 
134 		printf("%-16s %-10s %-10s %-5d %-8s %s\n",
135 		    ms->ms_name, class, source, ms->ms_refcnt, sbuf,
136 		    ms->ms_required);
137 	}
138 
139 	exit(EXIT_SUCCESS);
140 }
141 
142 static void
143 usage(void)
144 {
145 
146 	(void)fprintf(stderr, "Usage: %s [-n name]\n", getprogname());
147 	exit(EXIT_FAILURE);
148 }
149 
150 static int
151 modstatcmp(const void *a, const void *b)
152 {
153 	const modstat_t *msa, *msb;
154 
155 	msa = a;
156 	msb = b;
157 
158 	return strcmp(msa->ms_name, msb->ms_name);
159 }
160