1 /* $NetBSD: main.c,v 1.24 2016/11/16 10:43:37 pgoyette 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 1.24 2016/11/16 10:43:37 pgoyette Exp $"); 32 #endif /* !lint */ 33 34 #include <sys/module.h> 35 #include <sys/param.h> 36 #include <sys/sysctl.h> 37 38 #include <err.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 #include <unistd.h> 44 #include <stdbool.h> 45 46 #include "prog_ops.h" 47 48 static void usage(void) __dead; 49 static int modstatcmp(const void *, const void *); 50 51 static const char *classes[] = { 52 "any", 53 "misc", 54 "vfs", 55 "driver", 56 "exec", 57 "secmodel", 58 "bufq" 59 }; 60 const unsigned int class_max = __arraycount(classes); 61 62 static const char *sources[] = { 63 "builtin", 64 "boot", 65 "filesys", 66 }; 67 const unsigned int source_max = __arraycount(sources); 68 69 static const char *modflags[] = { 70 "-", "f", "a", "af" 71 }; 72 73 int 74 main(int argc, char **argv) 75 { 76 struct iovec iov; 77 modstat_t *ms; 78 size_t len; 79 const char *name; 80 char sbuf[32]; 81 int ch, rc, modauto = 1; 82 size_t maxnamelen = 16, i, modautolen; 83 char loadable = '\0'; 84 bool address = false; 85 86 name = NULL; 87 88 while ((ch = getopt(argc, argv, "Aaekn:")) != -1) { 89 switch (ch) { 90 case 'A': /* FALLTHROUGH */ 91 case 'a': /* FALLTHROUGH */ 92 case 'e': 93 loadable = (char)ch; 94 break; 95 case 'k': 96 address = true; 97 break; 98 case 'n': 99 name = optarg; 100 break; 101 default: 102 usage(); 103 /* NOTREACHED */ 104 } 105 } 106 107 argc -= optind; 108 argv += optind; 109 if (argc == 1 && name == NULL) 110 name = argv[0]; 111 else if (argc != 0) 112 usage(); 113 114 if (prog_init && prog_init() == -1) 115 err(1, "prog init failed"); 116 117 if (loadable == 'A' || loadable == 'a') { 118 if (prog_modctl(MODCTL_EXISTS, (void *)(uintptr_t)1)) { 119 switch (errno) { 120 case ENOSYS: 121 errx(EXIT_FAILURE, "The kernel was compiled " 122 "without options MODULAR."); 123 break; 124 case EPERM: 125 errx(EXIT_FAILURE, "Modules can not be " 126 "autoloaded right now."); 127 break; 128 default: 129 err(EXIT_FAILURE, "modctl_exists for autoload"); 130 break; 131 } 132 } else { 133 if (loadable == 'A') { 134 modautolen = sizeof(modauto); 135 rc = sysctlbyname("kern.module.autoload", 136 &modauto, &modautolen, NULL, 0); 137 if (rc != 0) { 138 err(EXIT_FAILURE, "sysctl " 139 "kern.module.autoload failed."); 140 } 141 } 142 errx(EXIT_SUCCESS, "Modules can be autoloaded%s.", 143 modauto ? "" : ", but kern.module.autoload = 0"); 144 } 145 } 146 147 if (loadable == 'e') { 148 if (prog_modctl(MODCTL_EXISTS, (void *)(uintptr_t)0)) { 149 switch (errno) { 150 case ENOSYS: 151 errx(EXIT_FAILURE, "The kernel was compiled " 152 "without options MODULAR."); 153 break; 154 case EPERM: 155 errx(EXIT_FAILURE, "You are not allowed to " 156 "load modules right now."); 157 break; 158 default: 159 err(EXIT_FAILURE, "modctl_exists for autoload"); 160 break; 161 } 162 } else { 163 errx(EXIT_SUCCESS, "You can load modules."); 164 } 165 } 166 167 for (len = 8192;;) { 168 iov.iov_base = malloc(len); 169 iov.iov_len = len; 170 if (prog_modctl(MODCTL_STAT, &iov)) { 171 err(EXIT_FAILURE, "modctl(MODCTL_STAT)"); 172 } 173 if (len >= iov.iov_len) { 174 break; 175 } 176 free(iov.iov_base); 177 len = iov.iov_len; 178 } 179 180 len = iov.iov_len / sizeof(modstat_t); 181 qsort(iov.iov_base, len, sizeof(modstat_t), modstatcmp); 182 for (i = 0, ms = iov.iov_base; i < len; i++, ms++) { 183 size_t namelen = strlen(ms->ms_name); 184 if (maxnamelen < namelen) 185 maxnamelen = namelen; 186 } 187 printf("%-*s %-8s %-8s %-4s %5s ", 188 (int)maxnamelen, "NAME", "CLASS", "SOURCE", "FLAG", "REFS"); 189 if (address) 190 printf("%-16s ", "ADDRESS"); 191 printf("%7s %s \n", "SIZE", "REQUIRES"); 192 for (ms = iov.iov_base; len != 0; ms++, len--) { 193 const char *class; 194 const char *source; 195 196 if (name != NULL && strcmp(ms->ms_name, name) != 0) { 197 continue; 198 } 199 if (ms->ms_required[0] == '\0') { 200 ms->ms_required[0] = '-'; 201 ms->ms_required[1] = '\0'; 202 } 203 if (ms->ms_size == 0) { 204 sbuf[0] = '-'; 205 sbuf[1] = '\0'; 206 } else { 207 snprintf(sbuf, sizeof(sbuf), "%u", ms->ms_size); 208 } 209 if (ms->ms_class <= class_max) 210 class = classes[ms->ms_class]; 211 else 212 class = "UNKNOWN"; 213 if (ms->ms_source < source_max) 214 source = sources[ms->ms_source]; 215 else 216 source = "UNKNOWN"; 217 218 printf("%-*s %-8s %-8s %-4s %5d ", 219 (int)maxnamelen, ms->ms_name, class, source, 220 modflags[ms->ms_flags & (__arraycount(modflags) - 1)], 221 ms->ms_refcnt); 222 if (address) 223 printf("%-16" PRIx64 " ", ms->ms_addr); 224 printf("%7s %s\n", sbuf, ms->ms_required); 225 } 226 227 exit(EXIT_SUCCESS); 228 } 229 230 static void 231 usage(void) 232 { 233 234 (void)fprintf(stderr, "Usage: %s [-Aaen] [name]\n", getprogname()); 235 exit(EXIT_FAILURE); 236 } 237 238 static int 239 modstatcmp(const void *a, const void *b) 240 { 241 const modstat_t *msa, *msb; 242 243 msa = a; 244 msb = b; 245 246 return strcmp(msa->ms_name, msb->ms_name); 247 } 248