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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 
  26 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T     */
  27 /*        All Rights Reserved   */
  28 
  29 
  30 
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <sys/param.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <ctype.h>
  37 #include <limits.h>
  38 #include <string.h>
  39 #include <userdefs.h>
  40 #include <user_attr.h>
  41 #include <nss_dbdefs.h>
  42 #include <errno.h>
  43 #include <project.h>
  44 #include "users.h"
  45 #include "messages.h"
  46 #include "funcs.h"
  47 
  48 /*
  49  *  usermod [-u uid [-o] | -g group | -G group [[,group]...] | -d dir [-m]
  50  *              | -s shell | -c comment | -l new_logname]
  51  *              | -f inactive | -e expire ]
  52  *              [ -A authorization [, authorization ...]]
  53  *              [ -P profile [, profile ...]]
  54  *              [ -R role [, role ...]]
  55  *              [ -K key=value ]
  56  *              [ -p project [, project]] login
  57  *
  58  *      This command adds new user logins to the system.  Arguments are:
  59  *
  60  *      uid - an integer less than MAXUID
  61  *      group - an existing group's integer ID or char string name
  62  *      dir - a directory
  63  *      shell - a program to be used as a shell
  64  *      comment - any text string
  65  *      skel_dir - a directory
  66  *      base_dir - a directory
  67  *      rid - an integer less than 2**16 (USHORT)
  68  *      login - a string of printable chars except colon (:)
  69  *      inactive - number of days a login maybe inactive before it is locked
  70  *      expire - date when a login is no longer valid
  71  *      authorization - One or more comma separated authorizations defined
  72  *                      in auth_attr(4).
  73  *      profile - One or more comma separated execution profiles defined
  74  *                in prof_attr(4)
  75  *      role - One or more comma-separated role names defined in user_attr(4)
  76  *      key=value - One or more -K options each specifying a valid user_attr(4)
  77  *              attribute.
  78  *
  79  */
  80 
  81 extern int **valid_lgroup(), isbusy();
  82 extern int valid_uid(), check_perm(), create_home(), move_dir();
  83 extern int valid_expire(), edit_group(), call_passmgmt();
  84 extern projid_t **valid_lproject();
  85 
  86 static uid_t uid;               /* new uid */
  87 static gid_t gid;                       /* gid of new login */
  88 static char *new_logname = NULL;        /* new login name with -l option */
  89 static char *uidstr = NULL;             /* uid from command line */
  90 static char *group = NULL;              /* group from command line */
  91 static char *grps = NULL;               /* multi groups from command line */
  92 static char *dir = NULL;                /* home dir from command line */
  93 static char *shell = NULL;              /* shell from command line */
  94 static char *comment = NULL;            /* comment from command line */
  95 static char *logname = NULL;            /* login name to add */
  96 static char *inactstr = NULL;           /* inactive from command line */
  97 static char *expire = NULL;             /* expiration date from command line */
  98 static char *projects = NULL;           /* project ids from command line */
  99 static char *usertype;
 100 
 101 char *cmdname;
 102 static char gidstring[32], uidstring[32];
 103 char inactstring[10];
 104 
 105 char *
 106 strcpmalloc(str)
 107 char *str;
 108 {
 109         if (str == NULL)
 110                 return (NULL);
 111 
 112         return (strdup(str));
 113 }
 114 struct passwd *
 115 passwd_cpmalloc(opw)
 116 struct passwd *opw;
 117 {
 118         struct passwd *npw;
 119 
 120         if (opw == NULL)
 121                 return (NULL);
 122 
 123 
 124         npw = malloc(sizeof (struct passwd));
 125 
 126         npw->pw_name = strcpmalloc(opw->pw_name);
 127         npw->pw_passwd = strcpmalloc(opw->pw_passwd);
 128         npw->pw_uid = opw->pw_uid;
 129         npw->pw_gid = opw->pw_gid;
 130         npw->pw_age = strcpmalloc(opw->pw_age);
 131         npw->pw_comment = strcpmalloc(opw->pw_comment);
 132         npw->pw_gecos  = strcpmalloc(opw->pw_gecos);
 133         npw->pw_dir = strcpmalloc(opw->pw_dir);
 134         npw->pw_shell = strcpmalloc(opw->pw_shell);
 135 
 136         return (npw);
 137 }
 138 
 139 int
 140 main(argc, argv)
 141 int argc;
 142 char **argv;
 143 {
 144         int ch, ret = EX_SUCCESS, call_pass = 0, oflag = 0;
 145         int tries, mflag = 0, inact, **gidlist, flag = 0;
 146         boolean_t fail_if_busy = B_FALSE;
 147         char *ptr;
 148         struct passwd *pstruct;         /* password struct for login */
 149         struct passwd *pw;
 150         struct group *g_ptr;    /* validated group from -g */
 151         struct stat statbuf;            /* status buffer for stat */
 152 #ifndef att
 153         FILE *pwf;              /* fille ptr for opened passwd file */
 154 #endif
 155         int warning;
 156         projid_t **projlist;
 157         char **nargv;                   /* arguments for execvp of passmgmt */
 158         int argindex;                   /* argument index into nargv */
 159         userattr_t *ua;
 160         char *val;
 161         int isrole;                     /* current account is role */
 162 
 163         cmdname = argv[0];
 164 
 165         if (geteuid() != 0) {
 166                 errmsg(M_PERM_DENIED);
 167                 exit(EX_NO_PERM);
 168         }
 169 
 170         opterr = 0;                     /* no print errors from getopt */
 171         /* get user type based on the program name */
 172         usertype = getusertype(argv[0]);
 173 
 174         while ((ch = getopt(argc, argv,
 175                                 "c:d:e:f:G:g:l:mop:s:u:A:P:R:K:")) != EOF)
 176                 switch (ch) {
 177                 case 'c':
 178                         comment = optarg;
 179                         flag++;
 180                         break;
 181                 case 'd':
 182                         dir = optarg;
 183                         fail_if_busy = B_TRUE;
 184                         flag++;
 185                         break;
 186                 case 'e':
 187                         expire = optarg;
 188                         flag++;
 189                         break;
 190                 case 'f':
 191                         inactstr = optarg;
 192                         flag++;
 193                         break;
 194                 case 'G':
 195                         grps = optarg;
 196                         flag++;
 197                         break;
 198                 case 'g':
 199                         group = optarg;
 200                         fail_if_busy = B_TRUE;
 201                         flag++;
 202                         break;
 203                 case 'l':
 204                         new_logname = optarg;
 205                         fail_if_busy = B_TRUE;
 206                         flag++;
 207                         break;
 208                 case 'm':
 209                         mflag++;
 210                         flag++;
 211                         fail_if_busy = B_TRUE;
 212                         break;
 213                 case 'o':
 214                         oflag++;
 215                         flag++;
 216                         fail_if_busy = B_TRUE;
 217                         break;
 218                 case 'p':
 219                         projects = optarg;
 220                         flag++;
 221                         break;
 222                 case 's':
 223                         shell = optarg;
 224                         flag++;
 225                         break;
 226                 case 'u':
 227                         uidstr = optarg;
 228                         flag++;
 229                         fail_if_busy = B_TRUE;
 230                         break;
 231                 case 'A':
 232                         change_key(USERATTR_AUTHS_KW, optarg);
 233                         flag++;
 234                         break;
 235                 case 'P':
 236                         change_key(USERATTR_PROFILES_KW, optarg);
 237                         flag++;
 238                         break;
 239                 case 'R':
 240                         change_key(USERATTR_ROLES_KW, optarg);
 241                         flag++;
 242                         break;
 243                 case 'K':
 244                         change_key(NULL, optarg);
 245                         flag++;
 246                         break;
 247                 default:
 248                 case '?':
 249                         if (is_role(usertype))
 250                                 errmsg(M_MRUSAGE);
 251                         else
 252                                 errmsg(M_MUSAGE);
 253                         exit(EX_SYNTAX);
 254                 }
 255 
 256         if (optind != argc - 1 || flag == 0) {
 257                 if (is_role(usertype))
 258                         errmsg(M_MRUSAGE);
 259                 else
 260                         errmsg(M_MUSAGE);
 261                 exit(EX_SYNTAX);
 262         }
 263 
 264         if ((!uidstr && oflag) || (mflag && !dir)) {
 265                 if (is_role(usertype))
 266                         errmsg(M_MRUSAGE);
 267                 else
 268                         errmsg(M_MUSAGE);
 269                 exit(EX_SYNTAX);
 270         }
 271 
 272         logname = argv[optind];
 273 
 274         /* Determine whether the account is a role or not */
 275         if ((ua = getusernam(logname)) == NULL ||
 276             (val = kva_match(ua->attr, USERATTR_TYPE_KW)) == NULL ||
 277             strcmp(val, USERATTR_TYPE_NONADMIN_KW) != 0)
 278                 isrole = 0;
 279         else
 280                 isrole = 1;
 281 
 282         /* Verify that rolemod is used for roles and usermod for users */
 283         if (isrole != is_role(usertype)) {
 284                 if (isrole)
 285                         errmsg(M_ISROLE);
 286                 else
 287                         errmsg(M_ISUSER);
 288                 exit(EX_SYNTAX);
 289         }
 290 
 291         /* Set the usertype key; defaults to the commandline  */
 292         usertype = getsetdefval(USERATTR_TYPE_KW, usertype);
 293 
 294         if (is_role(usertype)) {
 295                 /* Roles can't have roles */
 296                 if (getsetdefval(USERATTR_ROLES_KW, NULL) != NULL) {
 297                         errmsg(M_MRUSAGE);
 298                         exit(EX_SYNTAX);
 299                 }
 300                 /* If it was an ordinary user, delete its roles */
 301                 if (!isrole)
 302                         change_key(USERATTR_ROLES_KW, "");
 303         }
 304 
 305 #ifdef att
 306         pw = getpwnam(logname);
 307 #else
 308         /*
 309          * Do this with fgetpwent to make sure we are only looking on local
 310          * system (since passmgmt only works on local system).
 311          */
 312         if ((pwf = fopen("/etc/passwd", "r")) == NULL) {
 313                 errmsg(M_OOPS, "open", "/etc/passwd");
 314                 exit(EX_FAILURE);
 315         }
 316         while ((pw = fgetpwent(pwf)) != NULL)
 317                 if (strcmp(pw->pw_name, logname) == 0)
 318                         break;
 319 
 320         fclose(pwf);
 321 #endif
 322 
 323         if (pw == NULL) {
 324                 char            pwdb[NSS_BUFLEN_PASSWD];
 325                 struct passwd   pwd;
 326 
 327                 if (getpwnam_r(logname, &pwd, pwdb, sizeof (pwdb)) == NULL) {
 328                         /* This user does not exist. */
 329                         errmsg(M_EXIST, logname);
 330                         exit(EX_NAME_NOT_EXIST);
 331                 } else {
 332                         /* This user exists in non-local name service. */
 333                         errmsg(M_NONLOCAL, logname);
 334                         exit(EX_NOT_LOCAL);
 335                 }
 336         }
 337 
 338         pstruct = passwd_cpmalloc(pw);
 339 
 340         /*
 341          * We can't modify a logged in user if any of the following
 342          * are being changed:
 343          * uid (-u & -o), group (-g), home dir (-m), loginname (-l).
 344          * If none of those are specified it is okay to go ahead
 345          * some types of changes only take effect on next login, some
 346          * like authorisations and profiles take effect instantly.
 347          * One might think that -K type=role should require that the
 348          * user not be logged in, however this would make it very
 349          * difficult to make the root account a role using this command.
 350          */
 351         if (isbusy(logname)) {
 352                 if (fail_if_busy) {
 353                         errmsg(M_BUSY, logname, "change");
 354                         exit(EX_BUSY);
 355                 }
 356                 warningmsg(WARN_LOGGED_IN, logname);
 357         }
 358 
 359         if (new_logname && strcmp(new_logname, logname)) {
 360                 switch (valid_login(new_logname, (struct passwd **)NULL,
 361                         &warning)) {
 362                 case INVALID:
 363                         errmsg(M_INVALID, new_logname, "login name");
 364                         exit(EX_BADARG);
 365                         /*NOTREACHED*/
 366 
 367                 case NOTUNIQUE:
 368                         errmsg(M_USED, new_logname);
 369                         exit(EX_NAME_EXISTS);
 370                         /*NOTREACHED*/
 371                 default:
 372                         call_pass = 1;
 373                         break;
 374                 }
 375                 if (warning)
 376                         warningmsg(warning, logname);
 377         }
 378 
 379         if (uidstr) {
 380                 /* convert uidstr to integer */
 381                 errno = 0;
 382                 uid = (uid_t)strtol(uidstr, &ptr, (int)10);
 383                 if (*ptr || errno == ERANGE) {
 384                         errmsg(M_INVALID, uidstr, "user id");
 385                         exit(EX_BADARG);
 386                 }
 387 
 388                 if (uid != pstruct->pw_uid) {
 389                         switch (valid_uid(uid, NULL)) {
 390                         case NOTUNIQUE:
 391                                 if (!oflag) {
 392                                         /* override not specified */
 393                                         errmsg(M_UID_USED, uid);
 394                                         exit(EX_ID_EXISTS);
 395                                 }
 396                                 break;
 397                         case RESERVED:
 398                                 errmsg(M_RESERVED, uid);
 399                                 break;
 400                         case TOOBIG:
 401                                 errmsg(M_TOOBIG, "uid", uid);
 402                                 exit(EX_BADARG);
 403                                 break;
 404                         }
 405 
 406                         call_pass = 1;
 407 
 408                 } else {
 409                         /* uid's the same, so don't change anything */
 410                         uidstr = NULL;
 411                         oflag = 0;
 412                 }
 413 
 414         } else uid = pstruct->pw_uid;
 415 
 416         if (group) {
 417                 switch (valid_group(group, &g_ptr, &warning)) {
 418                 case INVALID:
 419                         errmsg(M_INVALID, group, "group id");
 420                         exit(EX_BADARG);
 421                         /*NOTREACHED*/
 422                 case TOOBIG:
 423                         errmsg(M_TOOBIG, "gid", group);
 424                         exit(EX_BADARG);
 425                         /*NOTREACHED*/
 426                 case UNIQUE:
 427                         errmsg(M_GRP_NOTUSED, group);
 428                         exit(EX_NAME_NOT_EXIST);
 429                         /*NOTREACHED*/
 430                 case RESERVED:
 431                         gid = (gid_t)strtol(group, &ptr, (int)10);
 432                         errmsg(M_RESERVED_GID, gid);
 433                         break;
 434                 }
 435                 if (warning)
 436                         warningmsg(warning, group);
 437 
 438                 if (g_ptr != NULL)
 439                         gid = g_ptr->gr_gid;
 440                 else
 441                         gid = pstruct->pw_gid;
 442 
 443                 /* call passmgmt if gid is different, else ignore group */
 444                 if (gid != pstruct->pw_gid)
 445                         call_pass = 1;
 446                 else group = NULL;
 447 
 448         } else gid = pstruct->pw_gid;
 449 
 450         if (grps && *grps) {
 451                 if (!(gidlist = valid_lgroup(grps, gid)))
 452                         exit(EX_BADARG);
 453         } else
 454                 gidlist = (int **)0;
 455 
 456         if (projects && *projects) {
 457                 if (! (projlist = valid_lproject(projects)))
 458                         exit(EX_BADARG);
 459         } else
 460                 projlist = (projid_t **)0;
 461 
 462         if (dir) {
 463                 if (REL_PATH(dir)) {
 464                         errmsg(M_RELPATH, dir);
 465                         exit(EX_BADARG);
 466                 }
 467                 if (strcmp(pstruct->pw_dir, dir) == 0) {
 468                         /* home directory is the same so ignore dflag & mflag */
 469                         dir = NULL;
 470                         mflag = 0;
 471                 } else call_pass = 1;
 472         }
 473 
 474         if (mflag) {
 475                 if (stat(dir, &statbuf) == 0) {
 476                         /* Home directory exists */
 477                         if (check_perm(statbuf, pstruct->pw_uid,
 478                             pstruct->pw_gid, S_IWOTH|S_IXOTH) != 0) {
 479                                 errmsg(M_NO_PERM, logname, dir);
 480                                 exit(EX_NO_PERM);
 481                         }
 482 
 483                 } else ret = create_home(dir, NULL, uid, gid);
 484 
 485                 if (ret == EX_SUCCESS)
 486                         ret = move_dir(pstruct->pw_dir, dir, logname);
 487 
 488                 if (ret != EX_SUCCESS)
 489                         exit(ret);
 490         }
 491 
 492         if (shell) {
 493                 if (REL_PATH(shell)) {
 494                         errmsg(M_RELPATH, shell);
 495                         exit(EX_BADARG);
 496                 }
 497                 if (strcmp(pstruct->pw_shell, shell) == 0) {
 498                         /* ignore s option if shell is not different */
 499                         shell = NULL;
 500                 } else {
 501                         if (stat(shell, &statbuf) < 0 ||
 502                             (statbuf.st_mode & S_IFMT) != S_IFREG ||
 503                             (statbuf.st_mode & 0555) != 0555) {
 504 
 505                                 errmsg(M_INVALID, shell, "shell");
 506                                 exit(EX_BADARG);
 507                         }
 508 
 509                         call_pass = 1;
 510                 }
 511         }
 512 
 513         if (comment)
 514                 /* ignore comment if comment is not changed */
 515                 if (strcmp(pstruct->pw_comment, comment))
 516                         call_pass = 1;
 517                 else
 518                         comment = NULL;
 519 
 520         /* inactive string is a positive integer */
 521         if (inactstr) {
 522                 /* convert inactstr to integer */
 523                 inact = (int)strtol(inactstr, &ptr, 10);
 524                 if (*ptr || inact < 0) {
 525                         errmsg(M_INVALID, inactstr, "inactivity period");
 526                         exit(EX_BADARG);
 527                 }
 528                 call_pass = 1;
 529         }
 530 
 531         /* expiration string is a date, newer than today */
 532         if (expire) {
 533                 if (*expire &&
 534                     valid_expire(expire, (time_t *)0) == INVALID) {
 535                         errmsg(M_INVALID, expire, "expiration date");
 536                         exit(EX_BADARG);
 537                 }
 538                 call_pass = 1;
 539         }
 540 
 541         if (nkeys > 0)
 542                 call_pass = 1;
 543 
 544         /* that's it for validations - now do the work */
 545 
 546         if (grps) {
 547                 /* redefine login's supplentary group memberships */
 548                 ret = edit_group(logname, new_logname, gidlist, 1);
 549                 if (ret != EX_SUCCESS) {
 550                         errmsg(M_UPDATE, "modified");
 551                         exit(ret);
 552                 }
 553         }
 554         if (projects) {
 555                 ret = edit_project(logname, (char *)NULL, projlist, 0);
 556                 if (ret != EX_SUCCESS) {
 557                         errmsg(M_UPDATE, "modified");
 558                         exit(ret);
 559                 }
 560         }
 561 
 562 
 563         if (!call_pass) exit(ret);
 564 
 565         /* only get to here if need to call passmgmt */
 566         /* set up arguments to  passmgmt in nargv array */
 567         nargv = malloc((30 + nkeys * 2) * sizeof (char *));
 568 
 569         argindex = 0;
 570         nargv[argindex++] = PASSMGMT;
 571         nargv[argindex++] = "-m";       /* modify */
 572 
 573         if (comment) {  /* comment */
 574                 nargv[argindex++] = "-c";
 575                 nargv[argindex++] = comment;
 576         }
 577 
 578         if (dir) {
 579                 /* flags for home directory */
 580                 nargv[argindex++] = "-h";
 581                 nargv[argindex++] = dir;
 582         }
 583 
 584         if (group) {
 585                 /* set gid flag */
 586                 nargv[argindex++] = "-g";
 587                 (void) sprintf(gidstring, "%u", gid);
 588                 nargv[argindex++] = gidstring;
 589         }
 590 
 591         if (shell) {    /* shell */
 592                 nargv[argindex++] = "-s";
 593                 nargv[argindex++] = shell;
 594         }
 595 
 596         if (inactstr) {
 597                 nargv[argindex++] = "-f";
 598                 nargv[argindex++] = inactstr;
 599         }
 600 
 601         if (expire) {
 602                 nargv[argindex++] = "-e";
 603                 nargv[argindex++] = expire;
 604         }
 605 
 606         if (uidstr) {   /* set uid flag */
 607                 nargv[argindex++] = "-u";
 608                 (void) sprintf(uidstring, "%u", uid);
 609                 nargv[argindex++] = uidstring;
 610         }
 611 
 612         if (oflag) nargv[argindex++] = "-o";
 613 
 614         if (new_logname) {      /* redefine login name */
 615                 nargv[argindex++] = "-l";
 616                 nargv[argindex++] = new_logname;
 617         }
 618 
 619         if (nkeys > 0)
 620                 addkey_args(nargv, &argindex);
 621 
 622         /* finally - login name */
 623         nargv[argindex++] = logname;
 624 
 625         /* set the last to null */
 626         nargv[argindex++] = NULL;
 627 
 628         /* now call passmgmt */
 629         ret = PEX_FAILED;
 630         for (tries = 3; ret != PEX_SUCCESS && tries--; ) {
 631                 switch (ret = call_passmgmt(nargv)) {
 632                 case PEX_SUCCESS:
 633                 case PEX_BUSY:
 634                         break;
 635 
 636                 case PEX_HOSED_FILES:
 637                         errmsg(M_HOSED_FILES);
 638                         exit(EX_INCONSISTENT);
 639                         break;
 640 
 641                 case PEX_SYNTAX:
 642                 case PEX_BADARG:
 643                         /* should NEVER occur that passmgmt usage is wrong */
 644                         if (is_role(usertype))
 645                                 errmsg(M_MRUSAGE);
 646                         else
 647                                 errmsg(M_MUSAGE);
 648                         exit(EX_SYNTAX);
 649                         break;
 650 
 651                 case PEX_BADUID:
 652                         /* uid in use - shouldn't happen print message anyway */
 653                         errmsg(M_UID_USED, uid);
 654                         exit(EX_ID_EXISTS);
 655                         break;
 656 
 657                 case PEX_BADNAME:
 658                         /* invalid loname */
 659                         errmsg(M_USED, logname);
 660                         exit(EX_NAME_EXISTS);
 661                         break;
 662 
 663                 default:
 664                         errmsg(M_UPDATE, "modified");
 665                         exit(ret);
 666                         break;
 667                 }
 668         }
 669         if (tries == 0) {
 670                 errmsg(M_UPDATE, "modified");
 671         }
 672 
 673         exit(ret);
 674         /*NOTREACHED*/
 675 }