usr/src/cmd/uadmin/uadmin.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  26 /*        All Rights Reserved   */
  27
  28
  29
  30 #include <errno.h>
  31 #include <fcntl.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35 #include <strings.h>
  36 #include <signal.h>
  37 #include <unistd.h>
  38 #ifdef  __i386
  39 #include <libscf_priv.h>
  40 #endif /* __i386 */
  41
  42 #include <bsm/adt.h>
  43 #include <bsm/adt_event.h>
  44
  45 #include <sys/types.h>
  46 #include <sys/uadmin.h>
  47 #include <sys/wait.h>
  48
  49 #define SMF_RST "/etc/svc/volatile/resetting"
  50 #define RETRY_COUNT 15  /* number of 1 sec retries for audit(1M) to complete */
  51
  52 static const char *Usage = "Usage: %s cmd fcn [mdep]\n";
  53
  54 static int closeout_audit(int, int);
  55 static int turnoff_auditd(void);
  56 static void wait_for_auqueue();
  57 static int change_audit_file(void);
  58
  59 int
  60 main(int argc, char *argv[])
  61 {
  62         int cmd, fcn;
  63         uintptr_t mdep = NULL;
  64         sigset_t set;
  65         adt_session_data_t *ah;  /* audit session handle */
  66         adt_event_data_t *event = NULL; /* event to be generated */
  67         au_event_t event_id;
  68         enum adt_uadmin_fcn fcn_id;
  69
  70         if (argc < 3 || argc > 4) {
  71                 (void) fprintf(stderr, Usage, argv[0]);
  72                 return (1);
  73         }
  74
  75         (void) sigfillset(&set);
  76         (void) sigprocmask(SIG_BLOCK, &set, NULL);
  77
  78         cmd = atoi(argv[1]);
  79         fcn = atoi(argv[2]);
  80         if (argc == 4) {        /* mdep argument given */
  81                 if (cmd != A_REBOOT && cmd != A_SHUTDOWN && cmd != A_DUMP &&
  82                     cmd != A_FREEZE) {
  83                         (void) fprintf(stderr, "%s: mdep argument not "
  84                             "allowed for this cmd value\n", argv[0]);
  85                         (void) fprintf(stderr, Usage, argv[0]);
  86                         return (1);
  87                 } else {
  88                         mdep = (uintptr_t)argv[3];
  89                 }
  90         }
  91
  92         /* set up audit session and event */
  93         if (adt_start_session(&ah, NULL, ADT_USE_PROC_DATA) != 0) {
  94                 (void) fprintf(stderr, "%s: can't start audit session\n",
  95                     argv[0]);
  96         }
  97         switch (cmd) {
  98         case A_SHUTDOWN:
  99                 event_id = ADT_uadmin_shutdown;
 100                 break;
 101         case A_REBOOT:
 102                 event_id = ADT_uadmin_reboot;
 103                 break;
 104         case A_DUMP:
 105                 event_id = ADT_uadmin_dump;
 106                 break;
 107         case A_REMOUNT:
 108                 event_id = ADT_uadmin_remount;
 109                 break;
 110         case A_FREEZE:
 111                 event_id = ADT_uadmin_freeze;
 112                 break;
 113         case A_FTRACE:
 114                 event_id = ADT_uadmin_ftrace;
 115                 break;
 116         case A_CONFIG:
 117                 event_id = ADT_uadmin_config;
 118                 break;
 119         case A_SWAPCTL:
 120                 event_id = ADT_uadmin_swapctl;
 121                 break;
 122         default:
 123                 event_id = 0;
 124         }
 125         if ((event_id != 0) &&
 126             (event = adt_alloc_event(ah, event_id)) == NULL) {
 127                 (void) fprintf(stderr, "%s: can't allocate audit event\n",
 128                     argv[0]);
 129         }
 130         switch (fcn) {
 131         case AD_HALT:
 132                 fcn_id = ADT_UADMIN_FCN_AD_HALT;
 133                 break;
 134         case AD_POWEROFF:
 135                 fcn_id = ADT_UADMIN_FCN_AD_POWEROFF;
 136                 break;
 137         case AD_BOOT:
 138                 fcn_id = ADT_UADMIN_FCN_AD_BOOT;
 139                 break;
 140         case AD_IBOOT:
 141                 fcn_id = ADT_UADMIN_FCN_AD_IBOOT;
 142                 break;
 143         case AD_SBOOT:
 144                 fcn_id = ADT_UADMIN_FCN_AD_SBOOT;
 145                 break;
 146         case AD_SIBOOT:
 147                 fcn_id = ADT_UADMIN_FCN_AD_SIBOOT;
 148                 break;
 149         case AD_NOSYNC:
 150                 fcn_id = ADT_UADMIN_FCN_AD_NOSYNC;
 151                 break;
 152         case AD_FASTREBOOT:
 153 #ifdef __i386
 154                 fcn_id = ADT_UADMIN_FCN_AD_FASTREBOOT;
 155                 mdep = NULL;    /* Ignore all arguments */
 156 #else /* __i386 */
 157                 fcn = AD_BOOT;
 158                 fcn_id = ADT_UADMIN_FCN_AD_BOOT;
 159 #endif /* __i386 */
 160                 break;
 161         case AD_FASTREBOOT_DRYRUN:
 162                 fcn_id = ADT_UADMIN_FCN_AD_FASTREBOOT_DRYRUN;
 163                 mdep = NULL;    /* Ignore all arguments */
 164                 break;
 165         default:
 166                 fcn_id = 0;
 167         }
 168         if (cmd == A_FREEZE) {
 169                 switch (fcn) {
 170                 case AD_SUSPEND_TO_DISK:
 171                         fcn_id = ADT_UADMIN_FCN_AD_SUSPEND_TO_DISK;
 172                         break;
 173                 case AD_CHECK_SUSPEND_TO_DISK:
 174                         fcn_id = ADT_UADMIN_FCN_AD_CHECK_SUSPEND_TO_DISK;
 175                         break;
 176                 case AD_FORCE:
 177                         fcn_id = ADT_UADMIN_FCN_AD_FORCE;
 178                         break;
 179                 case AD_SUSPEND_TO_RAM:
 180                         fcn_id = ADT_UADMIN_FCN_AD_SUSPEND_TO_RAM;
 181                         break;
 182                 case AD_CHECK_SUSPEND_TO_RAM:
 183                         fcn_id = ADT_UADMIN_FCN_AD_CHECK_SUSPEND_TO_RAM;
 184                         break;
 185                 case AD_REUSEINIT:
 186                         fcn_id = ADT_UADMIN_FCN_AD_REUSEINIT;
 187                         break;
 188                 case AD_REUSABLE:
 189                         fcn_id = ADT_UADMIN_FCN_AD_REUSABLE;
 190                         break;
 191                 case AD_REUSEFINI:
 192                         fcn_id = ADT_UADMIN_FCN_AD_REUSEFINI;
 193                         break;
 194                 }
 195         } else if (cmd == A_FTRACE) {
 196                 switch (fcn) {
 197                 case AD_FTRACE_START:
 198                         fcn_id = ADT_UADMIN_FCN_AD_FTRACE_START;
 199                         break;
 200                 case AD_FTRACE_STOP:
 201                         fcn_id = ADT_UADMIN_FCN_AD_FTRACE_STOP;
 202                         break;
 203                 }
 204 #ifdef  __i386
 205         } else if (cmd == A_CONFIG) {
 206                 uint8_t boot_config = 0;
 207                 uint8_t boot_config_ovr = 0;
 208
 209                 switch (fcn) {
 210                 case AD_UPDATE_BOOT_CONFIG:
 211                         fcn_id = ADT_UADMIN_FCN_AD_UPDATE_BOOT_CONFIG;
 212                         scf_get_boot_config(&boot_config);
 213                         boot_config_ovr = boot_config;
 214                         scf_get_boot_config_ovr(&boot_config_ovr);
 215                         boot_config &= boot_config_ovr;
 216                         mdep = (uintptr_t)(&boot_config);
 217                         break;
 218                 }
 219 #endif /* __i386 */
 220         }
 221
 222         if (geteuid() == 0) {
 223                 if (event != NULL) {
 224                         switch (cmd) {
 225                         case A_SHUTDOWN:
 226                                 event->adt_uadmin_shutdown.fcn = fcn_id;
 227                                 event->adt_uadmin_shutdown.mdep = (char *)mdep;
 228                                 break;
 229                         case A_REBOOT:
 230                                 event->adt_uadmin_reboot.fcn = fcn_id;
 231                                 event->adt_uadmin_reboot.mdep = (char *)mdep;
 232                                 break;
 233                         case A_DUMP:
 234                                 event->adt_uadmin_dump.fcn = fcn_id;
 235                                 event->adt_uadmin_dump.mdep = (char *)mdep;
 236                                 break;
 237                         case A_REMOUNT:
 238                                 /* no parameters */
 239                                 break;
 240                         case A_FREEZE:
 241                                 event->adt_uadmin_freeze.fcn = fcn_id;
 242                                 event->adt_uadmin_freeze.mdep = (char *)mdep;
 243                                 break;
 244                         case A_FTRACE:
 245                                 event->adt_uadmin_ftrace.fcn = fcn_id;
 246                                 event->adt_uadmin_ftrace.mdep = (char *)mdep;
 247                                 break;
 248                         case A_CONFIG:
 249                                 event->adt_uadmin_config.fcn = fcn_id;
 250                                 event->adt_uadmin_config.mdep = (char *)mdep;
 251                                 break;
 252                         case A_SWAPCTL:
 253                                 event->adt_uadmin_swapctl.fcn = fcn_id;
 254                                 break;
 255                         }
 256
 257                         if (adt_put_event(event, ADT_SUCCESS, 0) != 0) {
 258                                 (void) fprintf(stderr,
 259                                     "%s: can't put audit event\n", argv[0]);
 260                         }
 261                         /*
 262                          * allow audit record to be processed in the kernel
 263                          * audit queue
 264                          */
 265                         wait_for_auqueue();
 266                 }
 267
 268                 if (closeout_audit(cmd, fcn) == -1)
 269                         (void) fprintf(stderr, "%s: can't turn off auditd\n",
 270                             argv[0]);
 271
 272                 if (cmd == A_SHUTDOWN || cmd == A_REBOOT)
 273                         (void) creat(SMF_RST, 0777);
 274         }
 275
 276         (void) adt_free_event(event);
 277         if (uadmin(cmd, fcn, mdep) < 0) {
 278                 perror("uadmin");
 279
 280                 (void) unlink(SMF_RST);
 281
 282                 return (1);
 283         }
 284
 285         /* If returning from a suspend, audit thaw */
 286         if ((cmd == A_FREEZE) &&
 287             ((fcn == AD_FORCE) ||
 288             (fcn == AD_REUSABLE) ||
 289             (fcn == AD_SUSPEND_TO_DISK) ||
 290             (fcn == AD_SUSPEND_TO_RAM))) {
 291                 if ((event = adt_alloc_event(ah, ADT_uadmin_thaw)) == NULL) {
 292                         (void) fprintf(stderr, "%s: can't allocate thaw audit "
 293                             "event\n", argv[0]);
 294                 }
 295                 event->adt_uadmin_thaw.fcn = fcn_id;
 296                 if (adt_put_event(event, ADT_SUCCESS, 0) != 0) {
 297                         (void) fprintf(stderr, "%s: can't put thaw audit "
 298                             "event\n", argv[0]);
 299                 }
 300                 (void) adt_free_event(event);
 301         }
 302         (void) adt_end_session(ah);
 303
 304         return (0);
 305 }
 306
 307 static int
 308 closeout_audit(int cmd, int fcn)
 309 {
 310         if (!adt_audit_state(AUC_AUDITING)) {
 311                 /* auditd not running, just return */
 312                 return (0);
 313         }
 314         switch (cmd) {
 315         case A_SHUTDOWN:
 316                 switch (fcn) {
 317                 case AD_FASTREBOOT_DRYRUN:
 318                         /* No system discontinuity, don't turn off auditd */
 319                         return (0);
 320                 default:
 321                         break;  /* For all the other shutdown functions */
 322                 }
 323                 /* FALLTHROUGH */
 324         case A_REBOOT:
 325         case A_DUMP:
 326                 /* system shutting down, turn off auditd */
 327                 return (turnoff_auditd());
 328         case A_REMOUNT:
 329         case A_SWAPCTL:
 330         case A_FTRACE:
 331         case A_CONFIG:
 332                 /* No system discontinuity, don't turn off auditd */
 333                 return (0);
 334         case A_FREEZE:
 335                 switch (fcn) {
 336                 case AD_CHECK_SUSPEND_TO_DISK:  /* AD_CHECK */
 337                 case AD_CHECK_SUSPEND_TO_RAM:
 338                 case AD_REUSEINIT:
 339                 case AD_REUSEFINI:
 340                         /* No system discontinuity, don't turn off auditd */
 341                         return (0);
 342                 case AD_REUSABLE:
 343                 case AD_SUSPEND_TO_DISK:        /* AD_COMPRESS */
 344                 case AD_SUSPEND_TO_RAM:
 345                 case AD_FORCE:
 346                         /* suspend the system, change audit files */
 347                         return (change_audit_file());
 348                 default:
 349                         return (0);     /* not an audit error */
 350                 }
 351         default:
 352                 return (0);     /* not an audit error */
 353         }
 354 }
 355
 356 static int
 357 turnoff_auditd(void)
 358 {
 359         int     rc;
 360         int     retries = RETRY_COUNT;
 361
 362         if ((rc = (int)fork()) == 0) {
 363                 (void) execl("/usr/sbin/audit", "audit", "-T", NULL);
 364                 (void) fprintf(stderr, "error disabling auditd: %s\n",
 365                     strerror(errno));
 366                 _exit(-1);
 367         } else if (rc == -1) {
 368                 (void) fprintf(stderr, "error disabling auditd: %s\n",
 369                     strerror(errno));
 370                 return (-1);
 371         }
 372
 373         /*
 374          * wait for auditd to finish its work.  auditd will change the
 375          * auditstart from AUC_AUDITING (auditd up and running) to
 376          * AUC_NOAUDIT.  Other states are errors, so we're done as well.
 377          */
 378         do {
 379                 int     auditstate;
 380
 381                 rc = -1;
 382                 if ((auditon(A_GETCOND, (caddr_t)&auditstate,
 383                     sizeof (auditstate)) == 0) &&
 384                     (auditstate == AUC_AUDITING)) {
 385                         retries--;
 386                         (void) sleep(1);
 387                 } else {
 388                         rc = 0;
 389                 }
 390         } while ((rc != 0) && (retries != 0));
 391
 392         return (rc);
 393 }
 394
 395 static int
 396 change_audit_file(void)
 397 {
 398         pid_t   pid;
 399
 400         if ((pid = fork()) == 0) {
 401                 (void) execl("/usr/sbin/audit", "audit", "-n", NULL);
 402                 (void) fprintf(stderr, "error changing audit files: %s\n",
 403                     strerror(errno));
 404                 _exit(-1);
 405         } else if (pid == -1) {
 406                 (void) fprintf(stderr, "error changing audit files: %s\n",
 407                     strerror(errno));
 408                 return (-1);
 409         } else {
 410                 pid_t   rc;
 411                 int     retries = RETRY_COUNT;
 412
 413                 /*
 414                  * Wait for audit(1M) -n process to complete
 415                  *
 416                  */
 417                 do {
 418                         if ((rc = waitpid(pid, NULL, WNOHANG)) == pid) {
 419                                 return (0);
 420                         } else if (rc == -1) {
 421                                 return (-1);
 422                         } else {
 423                                 (void) sleep(1);
 424                                 retries--;
 425                         }
 426
 427                 } while (retries != 0);
 428         }
 429         return (-1);
 430 }
 431
 432 static void
 433 wait_for_auqueue()
 434 {
 435         au_stat_t       au_stat;
 436         int             retries = 10;
 437
 438         while (retries-- && auditon(A_GETSTAT, (caddr_t)&au_stat, NULL) == 0) {
 439                 if (au_stat.as_enqueue == au_stat.as_written) {
 440                         break;
 441                 }
 442                 (void) sleep(1);
 443         }
 444 }