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main.c revision 1.2 
      1 /*	$NetBSD: main.c,v 1.2 2008/01/19 01:18:47 ad 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the NetBSD
     18  *	Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __RCSID("$NetBSD: main.c,v 1.2 2008/01/19 01:18:47 ad Exp $");
     39 #endif /* !lint */
     40 
     41 #include <sys/module.h>
     42 
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 #include <err.h>
     48 
     49 int	main(int, char **);
     50 static void	usage(void) __dead;
     51 
     52 static const char *classes[] = {
     53 	"any",
     54 	"misc",
     55 	"vfs",
     56 	"driver",
     57 	"exec",
     58 };
     59 
     60 static const char *sources[] = {
     61 	"kernel",
     62 	"boot",
     63 	"filesys",
     64 };
     65 
     66 int
     67 main(int argc, char **argv)
     68 {
     69 	struct iovec iov;
     70 	modstat_t *ms;
     71 	size_t len;
     72 	const char *name;
     73 	char sbuf[32];
     74 	int ch;
     75 
     76 	name = NULL;
     77 
     78 	while ((ch = getopt(argc, argv, "n:")) != -1) {
     79 		switch (ch) {
     80 		case 'n':
     81 			name = optarg;
     82 			break;
     83 		default:
     84 			usage();
     85 			/* NOTREACHED */
     86 		}
     87 	}
     88 
     89 	argc -= optind;
     90 	argv += optind;
     91 	if (argc != 0)
     92 		usage();
     93 
     94 	for (len = 4096;;) {
     95 		iov.iov_base = malloc(len);
     96 		iov.iov_len = len;
     97 		if (modctl(MODCTL_STAT, &iov)) {
     98 			err(EXIT_FAILURE, "modctl(MODCTL_STAT)");
     99 		}
    100 		if (len >= iov.iov_len) {
    101 			break;
    102 		}
    103 		free(iov.iov_base);
    104 		len = iov.iov_len;
    105 	}
    106 
    107 	printf("NAME\t\tCLASS\tSOURCE\tREFS\tSIZE\tREQUIRES\n");
    108 	len = iov.iov_len / sizeof(modstat_t);
    109 	for (ms = iov.iov_base; len != 0; ms++, len--) {
    110 		if (name != NULL && strcmp(ms->ms_name, name) != 0) {
    111 			continue;
    112 		}
    113 		if (ms->ms_required[0] == '\0') {
    114 			ms->ms_required[0] = '-';
    115 			ms->ms_required[1] = '\0';
    116 		}
    117 		if (ms->ms_size == 0) {
    118 			sbuf[0] = '-';
    119 			sbuf[1] = '\0';
    120 		} else {
    121 			snprintf(sbuf, sizeof(sbuf), "%u", ms->ms_size);
    122 		}
    123 		printf("%-16s%s\t%s\t%d\t%s\t%s\n",
    124 		    ms->ms_name, classes[ms->ms_class], sources[ms->ms_source],
    125 		    ms->ms_refcnt, sbuf, ms->ms_required);
    126 	}
    127 
    128 	exit(EXIT_SUCCESS);
    129 }
    130 
    131 static void
    132 usage(void)
    133 {
    134 
    135 	(void)fprintf(stderr, "Usage: %s [-n name]", getprogname());
    136 	exit(EXIT_FAILURE);
    137 }
    138