Annotation of src/usr.bin/modstat/modstat.c, Revision 1.18
1.18 ! ericj 1: /* $OpenBSD: modstat.c,v 1.17 2002/01/09 18:19:28 ericj Exp $ */
1.6 deraadt 2:
1.1 deraadt 3: /*
4: * Copyright (c) 1993 Terrence R. Lambert.
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 Terrence R. Lambert.
18: * 4. The name Terrence R. Lambert may not be used to endorse or promote
19: * products derived from this software without specific prior written
20: * permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
23: * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
34: */
35:
36: #include <sys/param.h>
37: #include <sys/ioctl.h>
38: #include <sys/conf.h>
39: #include <sys/mount.h>
40: #include <sys/lkm.h>
1.9 deraadt 41: #include <stdio.h>
42: #include <stdlib.h>
43: #include <unistd.h>
44: #include <err.h>
1.12 millert 45: #include <fcntl.h>
1.9 deraadt 46: #include <string.h>
47: #include <a.out.h>
1.1 deraadt 48: #include <errno.h>
49: #include "pathnames.h"
50:
1.15 ericj 51: #define POINTERSIZE ((int)(2 * sizeof(void*)))
1.1 deraadt 52:
53: static char *type_names[] = {
54: "SYSCALL",
55: "VFS",
56: "DEV",
57: "EXEC",
58: "MISC"
59: };
60:
1.15 ericj 61: static void
62: usage()
63: {
64: extern char *__progname;
65:
66: (void)fprintf(stderr, "usage: %s [-i id] [-n name]\n", __progname);
67: exit(1);
68: }
69:
70: static int
71: dostat(int devfd, int modnum, char *modname)
1.1 deraadt 72: {
1.14 deraadt 73: char name[MAXLKMNAME];
1.1 deraadt 74: struct lmc_stat sbuf;
1.2 mickey 75:
1.14 deraadt 76: bzero(&name, sizeof name);
1.8 deraadt 77: bzero(&sbuf, sizeof sbuf);
1.2 mickey 78: sbuf.id = modnum;
79: sbuf.name = name;
1.1 deraadt 80:
1.6 deraadt 81: if (modname != NULL) {
1.10 provos 82: if (strlen(modname) >= sizeof(name))
1.6 deraadt 83: return 4;
1.14 deraadt 84: strlcpy(sbuf.name, modname, sizeof(name));
1.6 deraadt 85: }
1.1 deraadt 86:
87: if (ioctl(devfd, LMSTAT, &sbuf) == -1) {
88: switch (errno) {
89: case EINVAL: /* out of range */
90: return 2;
91: case ENOENT: /* no such entry */
92: return 1;
93: default: /* other error (EFAULT, etc) */
94: warn("LMSTAT");
95: return 4;
96: }
97: }
98:
1.14 deraadt 99: /* Decode this stat buffer... */
1.16 ericj 100: printf("%-7s %3d %3ld %0*lx %04lx %0*lx %3ld %s\n",
1.15 ericj 101: type_names[sbuf.type], sbuf.id, sbuf.offset, POINTERSIZE,
102: (long)sbuf.area, (long)sbuf.size, POINTERSIZE,
103: (long)sbuf.private, (long)sbuf.ver, sbuf.name);
1.1 deraadt 104:
105: return 0;
106: }
107:
108: int
109: main(argc, argv)
110: int argc;
111: char *argv[];
112: {
1.14 deraadt 113: int c, modnum = -1;
1.1 deraadt 114: char *modname = NULL;
1.16 ericj 115: char *endptr;
1.18 ! ericj 116: int devfd;
1.1 deraadt 117:
1.7 millert 118: while ((c = getopt(argc, argv, "i:n:")) != -1) {
1.1 deraadt 119: switch (c) {
120: case 'i':
1.16 ericj 121: modnum = (int)strtol(optarg, &endptr, 0);
122: if (modnum < 0 || modnum > INT_MAX || *endptr != '\0')
123: errx(1, "%s: not a valid number", optarg);
124: break;
1.1 deraadt 125: case 'n':
126: modname = optarg;
1.16 ericj 127: break;
1.6 deraadt 128: default:
1.1 deraadt 129: usage();
130: break;
131: }
132: }
133: argc -= optind;
134: argv += optind;
135:
136: if (argc != 0)
137: usage();
138:
139: /*
140: * Open the virtual device device driver for exclusive use (needed
141: * to ioctl() to retrive the loaded module(s) status).
142: */
1.12 millert 143: if ((devfd = open(_PATH_LKM, O_RDONLY)) == -1)
1.1 deraadt 144: err(2, _PATH_LKM);
1.11 deraadt 145:
146: setegid(getgid());
147: setgid(getgid());
1.1 deraadt 148:
1.15 ericj 149: printf("Type Id Off %-*s Size %-*s Rev Module Name\n",
150: POINTERSIZE, "Loadaddr", POINTERSIZE, "Info");
1.1 deraadt 151:
152: if (modnum != -1 || modname != NULL) {
153: if (dostat(devfd, modnum, modname))
154: exit(3);
155: exit(0);
156: }
157:
1.14 deraadt 158: /* Start at 0 and work up until we receive EINVAL. */
1.1 deraadt 159: for (modnum = 0; dostat(devfd, modnum, NULL) < 2; modnum++)
160: ;
161:
162: exit(0);
163: }
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