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main.c revision 1.4 
      1 /*	$NetBSD: main.c,v 1.4 2008/11/14 09:55:38 hira 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 1.4 2008/11/14 09:55:38 hira 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 
     45 static const char *classes[] = {
     46 	"any",
     47 	"misc",
     48 	"vfs",
     49 	"driver",
     50 	"exec",
     51 };
     52 
     53 static const char *sources[] = {
     54 	"kernel",
     55 	"boot",
     56 	"filesys",
     57 };
     58 
     59 int
     60 main(int argc, char **argv)
     61 {
     62 	struct iovec iov;
     63 	modstat_t *ms;
     64 	size_t len;
     65 	const char *name;
     66 	char sbuf[32];
     67 	int ch;
     68 
     69 	name = NULL;
     70 
     71 	while ((ch = getopt(argc, argv, "n:")) != -1) {
     72 		switch (ch) {
     73 		case 'n':
     74 			name = optarg;
     75 			break;
     76 		default:
     77 			usage();
     78 			/* NOTREACHED */
     79 		}
     80 	}
     81 
     82 	argc -= optind;
     83 	argv += optind;
     84 	if (argc != 0)
     85 		usage();
     86 
     87 	for (len = 4096;;) {
     88 		iov.iov_base = malloc(len);
     89 		iov.iov_len = len;
     90 		if (modctl(MODCTL_STAT, &iov)) {
     91 			err(EXIT_FAILURE, "modctl(MODCTL_STAT)");
     92 		}
     93 		if (len >= iov.iov_len) {
     94 			break;
     95 		}
     96 		free(iov.iov_base);
     97 		len = iov.iov_len;
     98 	}
     99 
    100 	printf("NAME\t\tCLASS\tSOURCE\tREFS\tSIZE\tREQUIRES\n");
    101 	len = iov.iov_len / sizeof(modstat_t);
    102 	for (ms = iov.iov_base; len != 0; ms++, len--) {
    103 		if (name != NULL && strcmp(ms->ms_name, name) != 0) {
    104 			continue;
    105 		}
    106 		if (ms->ms_required[0] == '\0') {
    107 			ms->ms_required[0] = '-';
    108 			ms->ms_required[1] = '\0';
    109 		}
    110 		if (ms->ms_size == 0) {
    111 			sbuf[0] = '-';
    112 			sbuf[1] = '\0';
    113 		} else {
    114 			snprintf(sbuf, sizeof(sbuf), "%u", ms->ms_size);
    115 		}
    116 		printf("%-16s%s\t%s\t%d\t%s\t%s\n",
    117 		    ms->ms_name, classes[ms->ms_class], sources[ms->ms_source],
    118 		    ms->ms_refcnt, sbuf, ms->ms_required);
    119 	}
    120 
    121 	exit(EXIT_SUCCESS);
    122 }
    123 
    124 static void
    125 usage(void)
    126 {
    127 
    128 	(void)fprintf(stderr, "Usage: %s [-n name]\n", getprogname());
    129 	exit(EXIT_FAILURE);
    130 }
    131