usr.sbin/pw/pw_user.c

   1 /*-
   2  * Copyright (C) 1996
   3  *      David L. Nugent.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27
  28 #ifndef lint
  29 static const char rcsid[] =
  30   "$FreeBSD$";
  31 #endif /* not lint */
  32
  33 #include <ctype.h>
  34 #include <err.h>
  35 #include <fcntl.h>
  36 #include <sys/param.h>
  37 #include <dirent.h>
  38 #include <paths.h>
  39 #include <termios.h>
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/resource.h>
  43 #include <unistd.h>
  44 #include <utmp.h>
  45 #include <login_cap.h>
  46 #if defined(USE_MD5RAND)
  47 #include <md5.h>
  48 #endif
  49 #include "pw.h"
  50 #include "bitmap.h"
  51
  52 #if (MAXLOGNAME-1) > UT_NAMESIZE
  53 #define LOGNAMESIZE UT_NAMESIZE
  54 #else
  55 #define LOGNAMESIZE (MAXLOGNAME-1)
  56 #endif
  57
  58 static          char locked_str[] = "*LOCKED*";
  59
  60 static int      print_user(struct passwd * pwd, int pretty, int v7);
  61 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  62 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  63 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  64 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  65 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  66 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  67 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  68 static char    *shell_path(char const * path, char *shells[], char *sh);
  69 static void     rmat(uid_t uid);
  70 static void     rmopie(char const * name);
  71
  72 /*-
  73  * -C config      configuration file
  74  * -q             quiet operation
  75  * -n name        login name
  76  * -u uid         user id
  77  * -c comment     user name/comment
  78  * -d directory   home directory
  79  * -e date        account expiry date
  80  * -p date        password expiry date
  81  * -g grp         primary group
  82  * -G grp1,grp2   additional groups
  83  * -m [ -k dir ]  create and set up home
  84  * -s shell       name of login shell
  85  * -o             duplicate uid ok
  86  * -L class       user class
  87  * -l name        new login name
  88  * -h fd          password filehandle
  89  * -H fd          encrypted password filehandle
  90  * -F             force print or add
  91  *   Setting defaults:
  92  * -D             set user defaults
  93  * -b dir         default home root dir
  94  * -e period      default expiry period
  95  * -p period      default password change period
  96  * -g group       default group
  97  * -G             grp1,grp2.. default additional groups
  98  * -L class       default login class
  99  * -k dir         default home skeleton
 100  * -s shell       default shell
 101  * -w method      default password method
 102  */
 103
 104 int
 105 pw_user(struct userconf * cnf, int mode, struct cargs * args)
 106 {
 107         int             rc, edited = 0;
 108         char           *p = NULL;
 109         char                                     *passtmp;
 110         struct carg    *a_name;
 111         struct carg    *a_uid;
 112         struct carg    *arg;
 113         struct passwd  *pwd = NULL;
 114         struct group   *grp;
 115         struct stat     st;
 116         char            line[_PASSWORD_LEN+1];
 117         FILE           *fp;
 118         mode_t dmode;
 119         char *dmode_c;
 120         void *set = NULL;
 121
 122         static struct passwd fakeuser =
 123         {
 124                 NULL,
 125                 "*",
 126                 -1,
 127                 -1,
 128                 0,
 129                 "",
 130                 "User &",
 131                 "/nonexistent",
 132                 "/bin/sh",
 133                 0
 134 #if defined(__FreeBSD__)
 135                 ,0
 136 #endif
 137         };
 138
 139
 140         /*
 141          * With M_NEXT, we only need to return the
 142          * next uid to stdout
 143          */
 144         if (mode == M_NEXT)
 145         {
 146                 uid_t next = pw_uidpolicy(cnf, args);
 147                 if (getarg(args, 'q'))
 148                         return next;
 149                 printf("%ld:", (long)next);
 150                 pw_group(cnf, mode, args);
 151                 return EXIT_SUCCESS;
 152         }
 153
 154         /*
 155          * We can do all of the common legwork here
 156          */
 157
 158         if ((arg = getarg(args, 'b')) != NULL) {
 159                 cnf->home = arg->val;
 160         }
 161
 162         if ((arg = getarg(args, 'M')) != NULL) {
 163                 dmode_c = arg->val;
 164                 if ((set = setmode(dmode_c)) == NULL)
 165                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 166                             dmode_c);
 167                 dmode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
 168                 free(set);
 169                 cnf->homemode = dmode;
 170         }
 171
 172         /*
 173          * If we'll need to use it or we're updating it,
 174          * then create the base home directory if necessary
 175          */
 176         if (arg != NULL || getarg(args, 'm') != NULL) {
 177                 int     l = strlen(cnf->home);
 178
 179                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 180                         cnf->home[--l] = '\0';
 181
 182                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 183                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 184
 185                 if (stat(cnf->home, &st) == -1) {
 186                         char    dbuf[MAXPATHLEN];
 187
 188                         /*
 189                          * This is a kludge especially for Joerg :)
 190                          * If the home directory would be created in the root partition, then
 191                          * we really create it under /usr which is likely to have more space.
 192                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 193                          */
 194                         if (strchr(cnf->home+1, '/') == NULL) {
 195                                 strcpy(dbuf, "/usr");
 196                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 197                                 if (mkdir(dbuf, cnf->homemode) != -1 || errno == EEXIST) {
 198                                         chown(dbuf, 0, 0);
 199                                         /*
 200                                          * Skip first "/" and create symlink:
 201                                          * /home -> usr/home
 202                                          */
 203                                         symlink(dbuf+1, cnf->home);
 204                                 }
 205                                 /* If this falls, fall back to old method */
 206                         }
 207                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 208                         p = dbuf;
 209                         if (stat(dbuf, &st) == -1) {
 210                                 while ((p = strchr(++p, '/')) != NULL) {
 211                                         *p = '\0';
 212                                         if (stat(dbuf, &st) == -1) {
 213                                                 if (mkdir(dbuf, cnf->homemode) == -1)
 214                                                         goto direrr;
 215                                                 chown(dbuf, 0, 0);
 216                                         } else if (!S_ISDIR(st.st_mode))
 217                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 218                                         *p = '/';
 219                                 }
 220                         }
 221                         if (stat(dbuf, &st) == -1) {
 222                                 if (mkdir(dbuf, cnf->homemode) == -1) {
 223                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 224                                 }
 225                                 chown(dbuf, 0, 0);
 226                         }
 227                 } else if (!S_ISDIR(st.st_mode))
 228                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 229         }
 230
 231         if ((arg = getarg(args, 'e')) != NULL)
 232                 cnf->expire_days = atoi(arg->val);
 233
 234         if ((arg = getarg(args, 'y')) != NULL)
 235                 cnf->nispasswd = arg->val;
 236
 237         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 238                 cnf->password_days = atoi(arg->val);
 239
 240         if ((arg = getarg(args, 'g')) != NULL) {
 241                 if (!*(p = arg->val))   /* Handle empty group list specially */
 242                         cnf->default_group = "";
 243                 else {
 244                         if ((grp = GETGRNAM(p)) == NULL) {
 245                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 246                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 247                         }
 248                         cnf->default_group = newstr(grp->gr_name);
 249                 }
 250         }
 251         if ((arg = getarg(args, 'L')) != NULL)
 252                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 253
 254         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 255                 int i = 0;
 256
 257                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 258                         if ((grp = GETGRNAM(p)) == NULL) {
 259                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 260                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 261                         }
 262                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 263                                 cnf->groups[i++] = newstr(grp->gr_name);
 264                 }
 265                 while (i < cnf->numgroups)
 266                         cnf->groups[i++] = NULL;
 267         }
 268
 269         if ((arg = getarg(args, 'k')) != NULL) {
 270                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 271                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 272         }
 273
 274         if ((arg = getarg(args, 's')) != NULL)
 275                 cnf->shell_default = arg->val;
 276
 277         if ((arg = getarg(args, 'w')) != NULL)
 278                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 279         if (mode == M_ADD && getarg(args, 'D')) {
 280                 if (getarg(args, 'n') != NULL)
 281                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 282                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 283                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 284                                 cnf->min_uid = 1000;
 285                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 286                                 cnf->max_uid = 32000;
 287                 }
 288                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 289                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 290                                 cnf->min_gid = 1000;
 291                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 292                                 cnf->max_gid = 32000;
 293                 }
 294
 295                 arg = getarg(args, 'C');
 296                 if (write_userconfig(arg ? arg->val : NULL))
 297                         return EXIT_SUCCESS;
 298                 warn("config update");
 299                 return EX_IOERR;
 300         }
 301
 302         if (mode == M_PRINT && getarg(args, 'a')) {
 303                 int             pretty = getarg(args, 'P') != NULL;
 304                 int             v7 = getarg(args, '7') != NULL;
 305
 306                 SETPWENT();
 307                 while ((pwd = GETPWENT()) != NULL)
 308                         print_user(pwd, pretty, v7);
 309                 ENDPWENT();
 310                 return EXIT_SUCCESS;
 311         }
 312
 313         if ((a_name = getarg(args, 'n')) != NULL)
 314                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 315         a_uid = getarg(args, 'u');
 316
 317         if (a_uid == NULL) {
 318                 if (a_name == NULL)
 319                         errx(EX_DATAERR, "user name or id required");
 320
 321                 /*
 322                  * Determine whether 'n' switch is name or uid - we don't
 323                  * really don't really care which we have, but we need to
 324                  * know.
 325                  */
 326                 if (mode != M_ADD && pwd == NULL
 327                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 328                     && atoi(a_name->val) > 0) { /* Assume uid */
 329                         (a_uid = a_name)->ch = 'u';
 330                         a_name = NULL;
 331                 }
 332         }
 333
 334         /*
 335          * Update, delete & print require that the user exists
 336          */
 337         if (mode == M_UPDATE || mode == M_DELETE ||
 338             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 339
 340                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 341                         pwd = GETPWUID(atoi(a_uid->val));
 342
 343                 if (pwd == NULL) {
 344                         if (mode == M_PRINT && getarg(args, 'F')) {
 345                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 346                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 347                                 return print_user(&fakeuser,
 348                                                   getarg(args, 'P') != NULL,
 349                                                   getarg(args, '7') != NULL);
 350                         }
 351                         if (a_name == NULL)
 352                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 353                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 354                 }
 355
 356                 if (a_name == NULL)     /* May be needed later */
 357                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 358
 359                 /*
 360                  * The M_LOCK and M_UNLOCK functions simply add or remove
 361                  * a "*LOCKED*" prefix from in front of the password to
 362                  * prevent it decoding correctly, and therefore prevents
 363                  * access. Of course, this only prevents access via
 364                  * password authentication (not ssh, kerberos or any
 365                  * other method that does not use the UNIX password) but
 366                  * that is a known limitation.
 367                  */
 368
 369                 if (mode == M_LOCK) {
 370                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 371                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 372                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 373                         if (passtmp == NULL)    /* disaster */
 374                                 errx(EX_UNAVAILABLE, "out of memory");
 375                         strcpy(passtmp, locked_str);
 376                         strcat(passtmp, pwd->pw_passwd);
 377                         pwd->pw_passwd = passtmp;
 378                         edited = 1;
 379                 } else if (mode == M_UNLOCK) {
 380                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 381                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 382                         pwd->pw_passwd += sizeof(locked_str)-1;
 383                         edited = 1;
 384                 } else if (mode == M_DELETE) {
 385                         /*
 386                          * Handle deletions now
 387                          */
 388                         char            file[MAXPATHLEN];
 389                         char            home[MAXPATHLEN];
 390                         uid_t           uid = pwd->pw_uid;
 391
 392                         if (strcmp(pwd->pw_name, "root") == 0)
 393                                 errx(EX_DATAERR, "cannot remove user 'root'");
 394
 395                         if (!PWALTDIR()) {
 396                                 /*
 397                                  * Remove opie record from /etc/opiekeys
 398                                  */
 399
 400                                 rmopie(pwd->pw_name);
 401
 402                                 /*
 403                                  * Remove crontabs
 404                                  */
 405                                 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
 406                                 if (access(file, F_OK) == 0) {
 407                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 408                                         system(file);
 409                                 }
 410                         }
 411                         /*
 412                          * Save these for later, since contents of pwd may be
 413                          * invalidated by deletion
 414                          */
 415                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 416                         strlcpy(home, pwd->pw_dir, sizeof(home));
 417
 418                         rc = delpwent(pwd);
 419                         if (rc == -1)
 420                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 421                         else if (rc != 0) {
 422                                 warn("passwd update");
 423                                 return EX_IOERR;
 424                         }
 425
 426                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 427                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 428                                 if (rc == -1)
 429                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 430                                 else if (rc != 0)
 431                                         warn("WARNING: NIS passwd update");
 432                                 /* non-fatal */
 433                         }
 434
 435                         editgroups(a_name->val, NULL);
 436
 437                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 438
 439                         if (!PWALTDIR()) {
 440                                 /*
 441                                  * Remove mail file
 442                                  */
 443                                 remove(file);
 444
 445                                 /*
 446                                  * Remove at jobs
 447                                  */
 448                                 if (getpwuid(uid) == NULL)
 449                                         rmat(uid);
 450
 451                                 /*
 452                                  * Remove home directory and contents
 453                                  */
 454                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 455                                         if (stat(home, &st) != -1) {
 456                                                 rm_r(home, uid);
 457                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 458                                                        a_name->val, (long) uid, home,
 459                                                        stat(home, &st) == -1 ? "" : "not completely ");
 460                                         }
 461                                 }
 462                         }
 463                         return EXIT_SUCCESS;
 464                 } else if (mode == M_PRINT)
 465                         return print_user(pwd,
 466                                           getarg(args, 'P') != NULL,
 467                                           getarg(args, '7') != NULL);
 468
 469                 /*
 470                  * The rest is edit code
 471                  */
 472                 if ((arg = getarg(args, 'l')) != NULL) {
 473                         if (strcmp(pwd->pw_name, "root") == 0)
 474                                 errx(EX_DATAERR, "can't rename `root' account");
 475                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 476                         edited = 1;
 477                 }
 478
 479                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 480                         pwd->pw_uid = (uid_t) atol(arg->val);
 481                         edited = 1;
 482                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 483                                 errx(EX_DATAERR, "can't change uid of `root' account");
 484                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 485                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 486                 }
 487
 488                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 489                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 490                         if (newgid != pwd->pw_gid) {
 491                                 edited = 1;
 492                                 pwd->pw_gid = newgid;
 493                         }
 494                 }
 495
 496                 if ((arg = getarg(args, 'p')) != NULL) {
 497                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 498                                 if (pwd->pw_change != 0) {
 499                                         pwd->pw_change = 0;
 500                                         edited = 1;
 501                                 }
 502                         }
 503                         else {
 504                                 time_t          now = time(NULL);
 505                                 time_t          expire = parse_date(now, arg->val);
 506
 507                                 if (now == expire)
 508                                         errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
 509                                 if (pwd->pw_change != expire) {
 510                                         pwd->pw_change = expire;
 511                                         edited = 1;
 512                                 }
 513                         }
 514                 }
 515
 516                 if ((arg = getarg(args, 'e')) != NULL) {
 517                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 518                                 if (pwd->pw_expire != 0) {
 519                                         pwd->pw_expire = 0;
 520                                         edited = 1;
 521                                 }
 522                         }
 523                         else {
 524                                 time_t          now = time(NULL);
 525                                 time_t          expire = parse_date(now, arg->val);
 526
 527                                 if (now == expire)
 528                                         errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
 529                                 if (pwd->pw_expire != expire) {
 530                                         pwd->pw_expire = expire;
 531                                         edited = 1;
 532                                 }
 533                         }
 534                 }
 535
 536                 if ((arg = getarg(args, 's')) != NULL) {
 537                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 538                         if (shell == NULL)
 539                                 shell = "";
 540                         if (strcmp(shell, pwd->pw_shell) != 0) {
 541                                 pwd->pw_shell = shell;
 542                                 edited = 1;
 543                         }
 544                 }
 545
 546                 if (getarg(args, 'L')) {
 547                         if (cnf->default_class == NULL)
 548                                 cnf->default_class = "";
 549                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 550                                 pwd->pw_class = cnf->default_class;
 551                                 edited = 1;
 552                         }
 553                 }
 554
 555                 if ((arg  = getarg(args, 'd')) != NULL) {
 556                         if (strcmp(pwd->pw_dir, arg->val))
 557                                 edited = 1;
 558                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 559                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 560                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 561                         } else if (!S_ISDIR(st.st_mode))
 562                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 563                 }
 564
 565                 if ((arg = getarg(args, 'w')) != NULL &&
 566                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 567                         login_cap_t *lc;
 568
 569                         lc = login_getpwclass(pwd);
 570                         if (lc == NULL ||
 571                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 572                                 warn("setting crypt(3) format");
 573                         login_close(lc);
 574                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 575                         edited = 1;
 576                 }
 577
 578         } else {
 579                 login_cap_t *lc;
 580
 581                 /*
 582                  * Add code
 583                  */
 584
 585                 if (a_name == NULL)     /* Required */
 586                         errx(EX_DATAERR, "login name required");
 587                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 588                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 589
 590                 /*
 591                  * Now, set up defaults for a new user
 592                  */
 593                 pwd = &fakeuser;
 594                 pwd->pw_name = a_name->val;
 595                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 596                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 597                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 598                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 599                 pwd->pw_expire = pw_exppolicy(cnf, args);
 600                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 601                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 602                 lc = login_getpwclass(pwd);
 603                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 604                         warn("setting crypt(3) format");
 605                 login_close(lc);
 606                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 607                 edited = 1;
 608
 609                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 610                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 611         }
 612
 613         /*
 614          * Shared add/edit code
 615          */
 616         if ((arg = getarg(args, 'c')) != NULL) {
 617                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 618                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 619                         pwd->pw_gecos = gecos;
 620                         edited = 1;
 621                 }
 622         }
 623
 624         if ((arg = getarg(args, 'h')) != NULL ||
 625             (arg = getarg(args, 'H')) != NULL) {
 626                 if (strcmp(arg->val, "-") == 0) {
 627                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 628                                 pwd->pw_passwd = "*";   /* No access */
 629                                 edited = 1;
 630                         }
 631                 } else {
 632                         int             fd = atoi(arg->val);
 633                         int             precrypt = (arg->ch == 'H');
 634                         int             b;
 635                         int             istty = isatty(fd);
 636                         struct termios  t;
 637                         login_cap_t     *lc;
 638
 639                         if (istty) {
 640                                 if (tcgetattr(fd, &t) == -1)
 641                                         istty = 0;
 642                                 else {
 643                                         struct termios  n = t;
 644
 645                                         /* Disable echo */
 646                                         n.c_lflag &= ~(ECHO);
 647                                         tcsetattr(fd, TCSANOW, &n);
 648                                         printf("%s%spassword for user %s:",
 649                                              (mode == M_UPDATE) ? "new " : "",
 650                                              precrypt ? "encrypted " : "",
 651                                              pwd->pw_name);
 652                                         fflush(stdout);
 653                                 }
 654                         }
 655                         b = read(fd, line, sizeof(line) - 1);
 656                         if (istty) {    /* Restore state */
 657                                 tcsetattr(fd, TCSANOW, &t);
 658                                 fputc('\n', stdout);
 659                                 fflush(stdout);
 660                         }
 661                         if (b < 0) {
 662                                 warn("-%c file descriptor", precrypt ? 'H' :
 663                                     'h');
 664                                 return EX_IOERR;
 665                         }
 666                         line[b] = '\0';
 667                         if ((p = strpbrk(line, "\r\n")) != NULL)
 668                                 *p = '\0';
 669                         if (!*line)
 670                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 671                         if (precrypt) {
 672                                 if (strchr(line, ':') != NULL)
 673                                         return EX_DATAERR;
 674                                 pwd->pw_passwd = line;
 675                         } else {
 676                                 lc = login_getpwclass(pwd);
 677                                 if (lc == NULL ||
 678                                     login_setcryptfmt(lc, "md5", NULL) == NULL)
 679                                         warn("setting crypt(3) format");
 680                                 login_close(lc);
 681                                 pwd->pw_passwd = pw_pwcrypt(line);
 682                         }
 683                         edited = 1;
 684                 }
 685         }
 686
 687         /*
 688          * Special case: -N only displays & exits
 689          */
 690         if (getarg(args, 'N') != NULL)
 691                 return print_user(pwd,
 692                                   getarg(args, 'P') != NULL,
 693                                   getarg(args, '7') != NULL);
 694
 695         if (mode == M_ADD) {
 696                 edited = 1;     /* Always */
 697                 rc = addpwent(pwd);
 698                 if (rc == -1) {
 699                         warnx("user '%s' already exists", pwd->pw_name);
 700                         return EX_IOERR;
 701                 } else if (rc != 0) {
 702                         warn("passwd file update");
 703                         return EX_IOERR;
 704                 }
 705                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 706                         rc = addnispwent(cnf->nispasswd, pwd);
 707                         if (rc == -1)
 708                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 709                         else
 710                                 warn("NIS passwd update");
 711                         /* NOTE: we treat NIS-only update errors as non-fatal */
 712                 }
 713         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 714                 if (edited) {   /* Only updated this if required */
 715                         rc = chgpwent(a_name->val, pwd);
 716                         if (rc == -1) {
 717                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 718                                 return EX_IOERR;
 719                         } else if (rc != 0) {
 720                                 warn("passwd file update");
 721                                 return EX_IOERR;
 722                         }
 723                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 724                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 725                                 if (rc == -1)
 726                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 727                                 else
 728                                         warn("NIS passwd update");
 729                                 /* NOTE: NIS-only update errors are not fatal */
 730                         }
 731                 }
 732         }
 733
 734         /*
 735          * Ok, user is created or changed - now edit group file
 736          */
 737
 738         if (mode == M_ADD || getarg(args, 'G') != NULL)
 739                 editgroups(pwd->pw_name, cnf->groups);
 740
 741         /* go get a current version of pwd */
 742         pwd = GETPWNAM(a_name->val);
 743         if (pwd == NULL) {
 744                 /* This will fail when we rename, so special case that */
 745                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 746                         a_name->val = arg->val;         /* update new name */
 747                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 748                 }
 749         }
 750         if (pwd == NULL)        /* can't go on without this */
 751                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 752
 753         grp = GETGRGID(pwd->pw_gid);
 754         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 755                pwd->pw_name, (long) pwd->pw_uid,
 756             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 757                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 758
 759         /*
 760          * If adding, let's touch and chown the user's mail file. This is not
 761          * strictly necessary under BSD with a 0755 maildir but it also
 762          * doesn't hurt anything to create the empty mailfile
 763          */
 764         if (mode == M_ADD) {
 765                 if (!PWALTDIR()) {
 766                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 767                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 768                                                                          * mtime */
 769                         chown(line, pwd->pw_uid, pwd->pw_gid);
 770                 }
 771         }
 772
 773         /*
 774          * Let's create and populate the user's home directory. Note
 775          * that this also `works' for editing users if -m is used, but
 776          * existing files will *not* be overwritten.
 777          */
 778         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 779                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 780                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 781                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 782         }
 783
 784
 785         /*
 786          * Finally, send mail to the new user as well, if we are asked to
 787          */
 788         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 789                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 790
 791                 if (pfp == NULL)
 792                         warn("sendmail");
 793                 else {
 794                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 795                         while (fgets(line, sizeof(line), fp) != NULL) {
 796                                 /* Do substitutions? */
 797                                 fputs(line, pfp);
 798                         }
 799                         pclose(pfp);
 800                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 801                             pwd->pw_name, (long) pwd->pw_uid);
 802                 }
 803                 fclose(fp);
 804         }
 805
 806         return EXIT_SUCCESS;
 807 }
 808
 809
 810 static          uid_t
 811 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 812 {
 813         struct passwd  *pwd;
 814         uid_t           uid = (uid_t) - 1;
 815         struct carg    *a_uid = getarg(args, 'u');
 816
 817         /*
 818          * Check the given uid, if any
 819          */
 820         if (a_uid != NULL) {
 821                 uid = (uid_t) atol(a_uid->val);
 822
 823                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 824                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 825         } else {
 826                 struct bitmap   bm;
 827
 828                 /*
 829                  * We need to allocate the next available uid under one of
 830                  * two policies a) Grab the first unused uid b) Grab the
 831                  * highest possible unused uid
 832                  */
 833                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 834                                                          * claus^H^H^H^Hheck */
 835                         cnf->min_uid = 1000;
 836                         cnf->max_uid = 32000;
 837                 }
 838                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 839
 840                 /*
 841                  * Now, let's fill the bitmap from the password file
 842                  */
 843                 SETPWENT();
 844                 while ((pwd = GETPWENT()) != NULL)
 845                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 846                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 847                 ENDPWENT();
 848
 849                 /*
 850                  * Then apply the policy, with fallback to reuse if necessary
 851                  */
 852                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 853                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 854
 855                 /*
 856                  * Another sanity check
 857                  */
 858                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 859                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 860                 bm_dealloc(&bm);
 861         }
 862         return uid;
 863 }
 864
 865
 866 static          uid_t
 867 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 868 {
 869         struct group   *grp;
 870         gid_t           gid = (uid_t) - 1;
 871         struct carg    *a_gid = getarg(args, 'g');
 872
 873         /*
 874          * If no arg given, see if default can help out
 875          */
 876         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 877                 a_gid = addarg(args, 'g', cnf->default_group);
 878
 879         /*
 880          * Check the given gid, if any
 881          */
 882         SETGRENT();
 883         if (a_gid != NULL) {
 884                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 885                         gid = (gid_t) atol(a_gid->val);
 886                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 887                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 888                 }
 889                 gid = grp->gr_gid;
 890         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 891                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 892         } else {
 893                 struct cargs    grpargs;
 894                 char            tmp[32];
 895
 896                 LIST_INIT(&grpargs);
 897                 addarg(&grpargs, 'n', nam);
 898
 899                 /*
 900                  * We need to auto-create a group with the user's name. We
 901                  * can send all the appropriate output to our sister routine
 902                  * bit first see if we can create a group with gid==uid so we
 903                  * can keep the user and group ids in sync. We purposely do
 904                  * NOT check the gid range if we can force the sync. If the
 905                  * user's name dups an existing group, then the group add
 906                  * function will happily handle that case for us and exit.
 907                  */
 908                 if (GETGRGID(prefer) == NULL) {
 909                         sprintf(tmp, "%lu", (unsigned long) prefer);
 910                         addarg(&grpargs, 'g', tmp);
 911                 }
 912                 if (getarg(args, 'N'))
 913                 {
 914                         addarg(&grpargs, 'N', NULL);
 915                         addarg(&grpargs, 'q', NULL);
 916                         gid = pw_group(cnf, M_NEXT, &grpargs);
 917                 }
 918                 else
 919                 {
 920                         pw_group(cnf, M_ADD, &grpargs);
 921                         if ((grp = GETGRNAM(nam)) != NULL)
 922                                 gid = grp->gr_gid;
 923                 }
 924                 a_gid = LIST_FIRST(&grpargs);
 925                 while (a_gid != NULL) {
 926                         struct carg    *t = LIST_NEXT(a_gid, list);
 927                         LIST_REMOVE(a_gid, list);
 928                         a_gid = t;
 929                 }
 930         }
 931         ENDGRENT();
 932         return gid;
 933 }
 934
 935
 936 static          time_t
 937 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 938 {
 939         time_t          result = 0;
 940         time_t          now = time(NULL);
 941         struct carg    *arg = getarg(args, 'p');
 942
 943         if (arg != NULL) {
 944                 if ((result = parse_date(now, arg->val)) == now)
 945                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 946         } else if (cnf->password_days > 0)
 947                 result = now + ((long) cnf->password_days * 86400L);
 948         return result;
 949 }
 950
 951
 952 static          time_t
 953 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 954 {
 955         time_t          result = 0;
 956         time_t          now = time(NULL);
 957         struct carg    *arg = getarg(args, 'e');
 958
 959         if (arg != NULL) {
 960                 if ((result = parse_date(now, arg->val)) == now)
 961                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 962         } else if (cnf->expire_days > 0)
 963                 result = now + ((long) cnf->expire_days * 86400L);
 964         return result;
 965 }
 966
 967
 968 static char    *
 969 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 970 {
 971         struct carg    *arg = getarg(args, 'd');
 972
 973         if (arg)
 974                 return arg->val;
 975         else {
 976                 static char     home[128];
 977
 978                 if (cnf->home == NULL || *cnf->home == '\0')
 979                         errx(EX_CONFIG, "no base home directory set");
 980                 sprintf(home, "%s/%s", cnf->home, user);
 981                 return home;
 982         }
 983 }
 984
 985 static char    *
 986 shell_path(char const * path, char *shells[], char *sh)
 987 {
 988         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 989                 return sh;      /* specified full path or forced none */
 990         else {
 991                 char           *p;
 992                 char            paths[_UC_MAXLINE];
 993
 994                 /*
 995                  * We need to search paths
 996                  */
 997                 strlcpy(paths, path, sizeof(paths));
 998                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 999                         int             i;
1000                         static char     shellpath[256];
1001
1002                         if (sh != NULL) {
1003                                 sprintf(shellpath, "%s/%s", p, sh);
1004                                 if (access(shellpath, X_OK) == 0)
1005                                         return shellpath;
1006                         } else
1007                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
1008                                         sprintf(shellpath, "%s/%s", p, shells[i]);
1009                                         if (access(shellpath, X_OK) == 0)
1010                                                 return shellpath;
1011                                 }
1012                 }
1013                 if (sh == NULL)
1014                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1015                 errx(EX_CONFIG, "no default shell available or defined");
1016                 return NULL;
1017         }
1018 }
1019
1020
1021 static char    *
1022 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1023 {
1024         char           *sh = newshell;
1025         struct carg    *arg = getarg(args, 's');
1026
1027         if (newshell == NULL && arg != NULL)
1028                 sh = arg->val;
1029         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1030 }
1031
1032 #define SALTSIZE        32
1033
1034 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1035
1036 char           *
1037 pw_pwcrypt(char *password)
1038 {
1039         int             i;
1040         char            salt[SALTSIZE + 1];
1041
1042         static char     buf[256];
1043
1044         /*
1045          * Calculate a salt value
1046          */
1047         for (i = 0; i < SALTSIZE; i++)
1048                 salt[i] = chars[arc4random() % (sizeof(chars) - 1)];
1049         salt[SALTSIZE] = '\0';
1050
1051         return strcpy(buf, crypt(password, salt));
1052 }
1053
1054 #if defined(USE_MD5RAND)
1055 u_char *
1056 pw_getrand(u_char *buf, int len)        /* cryptographically secure rng */
1057 {
1058         int i;
1059         for (i=0;i<len;i+=16) {
1060                 u_char ubuf[16];
1061
1062                 MD5_CTX md5_ctx;
1063                 struct timeval tv, tvo;
1064                 struct rusage ru;
1065                 int n=0;
1066                 int t;
1067
1068                 MD5Init (&md5_ctx);
1069                 t=getpid();
1070                 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
1071                 t=getppid();
1072                 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
1073                 gettimeofday (&tvo, NULL);
1074                 do {
1075                         getrusage (RUSAGE_SELF, &ru);
1076                         MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
1077                         gettimeofday (&tv, NULL);
1078                         MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
1079                 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
1080                 MD5Final (ubuf, &md5_ctx);
1081                 memcpy(buf+i, ubuf, MIN(16, len-i));
1082         }
1083         return buf;
1084 }
1085
1086 #else   /* Portable version */
1087
1088 static u_char *
1089 pw_getrand(u_char *buf, int len)
1090 {
1091         int i;
1092
1093         for (i = 0; i < len; i++) {
1094                 unsigned long val = arc4random();
1095                 /* Use all bits in the random value */
1096                 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
1097         }
1098         return buf;
1099 }
1100
1101 #endif
1102
1103 static char    *
1104 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1105 {
1106         int             i, l;
1107         char            pwbuf[32];
1108         u_char          rndbuf[sizeof pwbuf];
1109
1110         switch (cnf->default_password) {
1111         case -1:                /* Random password */
1112                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1113                 pw_getrand(rndbuf, l);
1114                 for (i = 0; i < l; i++)
1115                         pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)];
1116                 pwbuf[i] = '\0';
1117
1118                 /*
1119                  * We give this information back to the user
1120                  */
1121                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1122                     getarg(args, 'N') == NULL) {
1123                         if (isatty(STDOUT_FILENO))
1124                                 printf("Password for '%s' is: ", user);
1125                         printf("%s\n", pwbuf);
1126                         fflush(stdout);
1127                 }
1128                 break;
1129
1130         case -2:                /* No password at all! */
1131                 return "";
1132
1133         case 0:         /* No login - default */
1134         default:
1135                 return "*";
1136
1137         case 1:         /* user's name */
1138                 strlcpy(pwbuf, user, sizeof(pwbuf));
1139                 break;
1140         }
1141         return pw_pwcrypt(pwbuf);
1142 }
1143
1144
1145 static int
1146 print_user(struct passwd * pwd, int pretty, int v7)
1147 {
1148         if (!pretty) {
1149                 char            buf[_UC_MAXLINE];
1150
1151                 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
1152                 fputs(buf, stdout);
1153         } else {
1154                 int             j;
1155                 char           *p;
1156                 struct group   *grp = GETGRGID(pwd->pw_gid);
1157                 char            uname[60] = "User &", office[60] = "[None]",
1158                                 wphone[60] = "[None]", hphone[60] = "[None]";
1159                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1160                 struct tm *    tptr;
1161
1162                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1163                         strlcpy(uname, p, sizeof(uname));
1164                         if ((p = strtok(NULL, ",")) != NULL) {
1165                                 strlcpy(office, p, sizeof(office));
1166                                 if ((p = strtok(NULL, ",")) != NULL) {
1167                                         strlcpy(wphone, p, sizeof(wphone));
1168                                         if ((p = strtok(NULL, "")) != NULL) {
1169                                                 strlcpy(hphone, p,
1170                                                     sizeof(hphone));
1171                                         }
1172                                 }
1173                         }
1174                 }
1175                 /*
1176                  * Handle '&' in gecos field
1177                  */
1178                 if ((p = strchr(uname, '&')) != NULL) {
1179                         int             l = strlen(pwd->pw_name);
1180                         int             m = strlen(p);
1181
1182                         memmove(p + l, p + 1, m);
1183                         memmove(p, pwd->pw_name, l);
1184                         *p = (char) toupper((unsigned char)*p);
1185                 }
1186                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1187                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1188                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1189                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1190                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1191                        " Full Name: %s\n"
1192                        "      Home: %-26.26s      Class: %s\n"
1193                        "     Shell: %-26.26s     Office: %s\n"
1194                        "Work Phone: %-26.26s Home Phone: %s\n"
1195                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1196                        pwd->pw_name, (long) pwd->pw_uid,
1197                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1198                        uname, pwd->pw_dir, pwd->pw_class,
1199                        pwd->pw_shell, office, wphone, hphone,
1200                        acexpire, pwexpire);
1201                 SETGRENT();
1202                 j = 0;
1203                 while ((grp=GETGRENT()) != NULL)
1204                 {
1205                         int     i = 0;
1206                         while (grp->gr_mem[i] != NULL)
1207                         {
1208                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1209                                 {
1210                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1211                                         break;
1212                                 }
1213                                 ++i;
1214                         }
1215                 }
1216                 ENDGRENT();
1217                 printf("%s", j ? "\n" : "");
1218         }
1219         return EXIT_SUCCESS;
1220 }
1221
1222 char    *
1223 pw_checkname(u_char *name, int gecos)
1224 {
1225         char showch[8];
1226         u_char const *badchars, *ch, *showtype;
1227         int reject;
1228
1229         ch = name;
1230         reject = 0;
1231         if (gecos) {
1232                 /* See if the name is valid as a gecos (comment) field. */
1233                 badchars = ":!@";
1234                 showtype = "gecos field";
1235         } else {
1236                 /* See if the name is valid as a userid or group. */
1237                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1238                 showtype = "userid/group name";
1239                 /* Userids and groups can not have a leading '-'. */
1240                 if (*ch == '-')
1241                         reject = 1;
1242         }
1243         if (!reject) {
1244                 while (*ch) {
1245                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1246                             *ch == 127) {
1247                                 reject = 1;
1248                                 break;
1249                         }
1250                         /* 8-bit characters are only allowed in GECOS fields */
1251                         if (!gecos && (*ch & 0x80)) {
1252                                 reject = 1;
1253                                 break;
1254                         }
1255                         ch++;
1256                 }
1257         }
1258         /*
1259          * A `$' is allowed as the final character for userids and groups,
1260          * mainly for the benefit of samba.
1261          */
1262         if (reject && !gecos) {
1263                 if (*ch == '$' && *(ch + 1) == '\0') {
1264                         reject = 0;
1265                         ch++;
1266                 }
1267         }
1268         if (reject) {
1269                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1270                     ? "`%c'" : "0x%02x", *ch);
1271                 errx(EX_DATAERR, "invalid character %s at position %d in %s",
1272                     showch, (ch - name), showtype);
1273         }
1274         if (!gecos && (ch - name) > LOGNAMESIZE)
1275                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1276                     LOGNAMESIZE);
1277         return (char *)name;
1278 }
1279
1280
1281 static void
1282 rmat(uid_t uid)
1283 {
1284         DIR            *d = opendir("/var/at/jobs");
1285
1286         if (d != NULL) {
1287                 struct dirent  *e;
1288
1289                 while ((e = readdir(d)) != NULL) {
1290                         struct stat     st;
1291
1292                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1293                             stat(e->d_name, &st) == 0 &&
1294                             !S_ISDIR(st.st_mode) &&
1295                             st.st_uid == uid) {
1296                                 char            tmp[MAXPATHLEN];
1297
1298                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1299                                 system(tmp);
1300                         }
1301                 }
1302                 closedir(d);
1303         }
1304 }
1305
1306 static void
1307 rmopie(char const * name)
1308 {
1309         static const char etcopie[] = "/etc/opiekeys";
1310         FILE   *fp = fopen(etcopie, "r+");
1311
1312         if (fp != NULL) {
1313                 char    tmp[1024];
1314                 off_t   atofs = 0;
1315                 int     length = strlen(name);
1316
1317                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1318                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1319                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1320                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1321                                 }
1322                                 break;
1323                         }
1324                         atofs = ftell(fp);
1325                 }
1326                 /*
1327                  * If we got an error of any sort, don't update!
1328                  */
1329                 fclose(fp);
1330         }
1331 }
1332