Annotation of src/usr.bin/modstat/modstat.c, Revision 1.11
1.11 ! deraadt 1: /* $OpenBSD: modstat.c,v 1.10 1997/11/18 23:23:18 provos 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>
41: #include <sys/file.h>
1.9 deraadt 42: #include <stdio.h>
43: #include <stdlib.h>
44: #include <unistd.h>
45: #include <err.h>
46: #include <string.h>
47: #include <a.out.h>
1.1 deraadt 48: #include <errno.h>
49: #include "pathnames.h"
50:
51: void
52: usage()
53: {
54:
1.4 deraadt 55: fprintf(stderr,
1.6 deraadt 56: "usage: modstat [-i moduleid] [-n modulename]\n");
1.1 deraadt 57: exit(1);
58: }
59:
60: static char *type_names[] = {
61: "SYSCALL",
62: "VFS",
63: "DEV",
64: "STRMOD",
65: "EXEC",
66: "MISC"
67: };
68:
69: int
70: dostat(devfd, modnum, modname)
71: int devfd;
72: int modnum;
73: char *modname;
74: {
75: struct lmc_stat sbuf;
1.2 mickey 76: char name[MAXLKMNAME] = "";
77:
1.8 deraadt 78: bzero(&sbuf, sizeof sbuf);
1.2 mickey 79: sbuf.id = modnum;
80: sbuf.name = name;
1.1 deraadt 81:
1.6 deraadt 82: if (modname != NULL) {
1.10 provos 83: if (strlen(modname) >= sizeof(name))
1.6 deraadt 84: return 4;
1.1 deraadt 85: strcpy(sbuf.name, modname);
1.6 deraadt 86: }
1.1 deraadt 87:
88: if (ioctl(devfd, LMSTAT, &sbuf) == -1) {
89: switch (errno) {
90: case EINVAL: /* out of range */
91: return 2;
92: case ENOENT: /* no such entry */
93: return 1;
94: default: /* other error (EFAULT, etc) */
95: warn("LMSTAT");
96: return 4;
97: }
98: }
99:
100: /*
101: * Decode this stat buffer...
102: */
1.5 mickey 103: printf("%-7s %3d %3d %08x %04x %8x %3d %s\n",
1.1 deraadt 104: type_names[sbuf.type],
105: sbuf.id, /* module id */
106: sbuf.offset, /* offset into modtype struct */
107: sbuf.area, /* address module loaded at */
108: sbuf.size, /* size in pages(K) */
109: sbuf.private, /* kernel address of private area */
110: sbuf.ver, /* Version; always 1 for now */
111: sbuf.name /* name from private area */
112: );
113:
114: /*
115: * Done (success).
116: */
117: return 0;
118: }
119:
120: int devfd;
121:
122: void
123: cleanup()
124: {
125:
126: close(devfd);
127: }
128:
129: int
130: main(argc, argv)
131: int argc;
132: char *argv[];
133: {
134: int c;
135: int modnum = -1;
136: char *modname = NULL;
137:
1.7 millert 138: while ((c = getopt(argc, argv, "i:n:")) != -1) {
1.1 deraadt 139: switch (c) {
140: case 'i':
141: modnum = atoi(optarg);
142: break; /* number */
143: case 'n':
144: modname = optarg;
145: break; /* name */
1.6 deraadt 146: default:
1.1 deraadt 147: usage();
148: break;
149: }
150: }
151: argc -= optind;
152: argv += optind;
153:
154: if (argc != 0)
155: usage();
156:
157: /*
158: * Open the virtual device device driver for exclusive use (needed
159: * to ioctl() to retrive the loaded module(s) status).
160: */
161: if ((devfd = open(_PATH_LKM, O_RDONLY, 0)) == -1)
162: err(2, _PATH_LKM);
1.11 ! deraadt 163:
! 164: setegid(getgid());
! 165: setgid(getgid());
1.1 deraadt 166:
167: atexit(cleanup);
168:
1.5 mickey 169: printf("Type Id Off Loadaddr Size Info Rev Module Name\n");
1.1 deraadt 170:
171: /*
172: * Oneshot?
173: */
174: if (modnum != -1 || modname != NULL) {
175: if (dostat(devfd, modnum, modname))
176: exit(3);
177: exit(0);
178: }
179:
180: /*
181: * Start at 0 and work up until "EINVAL".
182: */
183: for (modnum = 0; dostat(devfd, modnum, NULL) < 2; modnum++)
184: ;
185:
186: exit(0);
187: }
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