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 <login_cap.h>
  45 #include <pwd.h>
  46 #include <grp.h>
  47 #include <libutil.h>
  48 #include "pw.h"
  49 #include "bitmap.h"
  50
  51 #define LOGNAMESIZE (MAXLOGNAME-1)
  52
  53 static          char locked_str[] = "*LOCKED*";
  54
  55 static int      print_user(struct passwd * pwd, int pretty, int v7);
  56 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  57 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  58 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  59 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  60 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  61 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  62 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  63 static char    *shell_path(char const * path, char *shells[], char *sh);
  64 static void     rmat(uid_t uid);
  65 static void     rmopie(char const * name);
  66
  67 /*-
  68  * -C config      configuration file
  69  * -q             quiet operation
  70  * -n name        login name
  71  * -u uid         user id
  72  * -c comment     user name/comment
  73  * -d directory   home directory
  74  * -e date        account expiry date
  75  * -p date        password expiry date
  76  * -g grp         primary group
  77  * -G grp1,grp2   additional groups
  78  * -m [ -k dir ]  create and set up home
  79  * -s shell       name of login shell
  80  * -o             duplicate uid ok
  81  * -L class       user class
  82  * -l name        new login name
  83  * -h fd          password filehandle
  84  * -H fd          encrypted password filehandle
  85  * -F             force print or add
  86  *   Setting defaults:
  87  * -D             set user defaults
  88  * -b dir         default home root dir
  89  * -e period      default expiry period
  90  * -p period      default password change period
  91  * -g group       default group
  92  * -G             grp1,grp2.. default additional groups
  93  * -L class       default login class
  94  * -k dir         default home skeleton
  95  * -s shell       default shell
  96  * -w method      default password method
  97  */
  98
  99 int
 100 pw_user(struct userconf * cnf, int mode, struct cargs * args)
 101 {
 102         int             rc, edited = 0;
 103         char           *p = NULL;
 104         char                                     *passtmp;
 105         struct carg    *a_name;
 106         struct carg    *a_uid;
 107         struct carg    *arg;
 108         struct passwd  *pwd = NULL;
 109         struct group   *grp;
 110         struct stat     st;
 111         char            line[_PASSWORD_LEN+1];
 112         FILE           *fp;
 113         char *dmode_c;
 114         void *set = NULL;
 115
 116         static struct passwd fakeuser =
 117         {
 118                 NULL,
 119                 "*",
 120                 -1,
 121                 -1,
 122                 0,
 123                 "",
 124                 "User &",
 125                 "/nonexistent",
 126                 "/bin/sh",
 127                 0
 128 #if defined(__FreeBSD__)
 129                 ,0
 130 #endif
 131         };
 132
 133
 134         /*
 135          * With M_NEXT, we only need to return the
 136          * next uid to stdout
 137          */
 138         if (mode == M_NEXT)
 139         {
 140                 uid_t next = pw_uidpolicy(cnf, args);
 141                 if (getarg(args, 'q'))
 142                         return next;
 143                 printf("%ld:", (long)next);
 144                 pw_group(cnf, mode, args);
 145                 return EXIT_SUCCESS;
 146         }
 147
 148         /*
 149          * We can do all of the common legwork here
 150          */
 151
 152         if ((arg = getarg(args, 'b')) != NULL) {
 153                 cnf->home = arg->val;
 154         }
 155
 156         if ((arg = getarg(args, 'M')) != NULL) {
 157                 dmode_c = arg->val;
 158                 if ((set = setmode(dmode_c)) == NULL)
 159                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 160                             dmode_c);
 161                 cnf->homemode = getmode(set, _DEF_DIRMODE);
 162                 free(set);
 163         }
 164
 165         /*
 166          * If we'll need to use it or we're updating it,
 167          * then create the base home directory if necessary
 168          */
 169         if (arg != NULL || getarg(args, 'm') != NULL) {
 170                 int     l = strlen(cnf->home);
 171
 172                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 173                         cnf->home[--l] = '\0';
 174
 175                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 176                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 177
 178                 if (stat(cnf->home, &st) == -1) {
 179                         char    dbuf[MAXPATHLEN];
 180
 181                         /*
 182                          * This is a kludge especially for Joerg :)
 183                          * If the home directory would be created in the root partition, then
 184                          * we really create it under /usr which is likely to have more space.
 185                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 186                          */
 187                         if (strchr(cnf->home+1, '/') == NULL) {
 188                                 strcpy(dbuf, "/usr");
 189                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 190                                 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 191                                         chown(dbuf, 0, 0);
 192                                         /*
 193                                          * Skip first "/" and create symlink:
 194                                          * /home -> usr/home
 195                                          */
 196                                         symlink(dbuf+1, cnf->home);
 197                                 }
 198                                 /* If this falls, fall back to old method */
 199                         }
 200                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 201                         p = dbuf;
 202                         if (stat(dbuf, &st) == -1) {
 203                                 while ((p = strchr(p + 1, '/')) != NULL) {
 204                                         *p = '\0';
 205                                         if (stat(dbuf, &st) == -1) {
 206                                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1)
 207                                                         goto direrr;
 208                                                 chown(dbuf, 0, 0);
 209                                         } else if (!S_ISDIR(st.st_mode))
 210                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 211                                         *p = '/';
 212                                 }
 213                         }
 214                         if (stat(dbuf, &st) == -1) {
 215                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1) {
 216                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 217                                 }
 218                                 chown(dbuf, 0, 0);
 219                         }
 220                 } else if (!S_ISDIR(st.st_mode))
 221                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 222         }
 223
 224         if ((arg = getarg(args, 'e')) != NULL)
 225                 cnf->expire_days = atoi(arg->val);
 226
 227         if ((arg = getarg(args, 'y')) != NULL)
 228                 cnf->nispasswd = arg->val;
 229
 230         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 231                 cnf->password_days = atoi(arg->val);
 232
 233         if ((arg = getarg(args, 'g')) != NULL) {
 234                 if (!*(p = arg->val))   /* Handle empty group list specially */
 235                         cnf->default_group = "";
 236                 else {
 237                         if ((grp = GETGRNAM(p)) == NULL) {
 238                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 239                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 240                         }
 241                         cnf->default_group = newstr(grp->gr_name);
 242                 }
 243         }
 244         if ((arg = getarg(args, 'L')) != NULL)
 245                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 246
 247         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 248                 int i = 0;
 249
 250                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 251                         if ((grp = GETGRNAM(p)) == NULL) {
 252                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 253                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 254                         }
 255                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 256                                 cnf->groups[i++] = newstr(grp->gr_name);
 257                 }
 258                 while (i < cnf->numgroups)
 259                         cnf->groups[i++] = NULL;
 260         }
 261
 262         if ((arg = getarg(args, 'k')) != NULL) {
 263                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 264                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 265         }
 266
 267         if ((arg = getarg(args, 's')) != NULL)
 268                 cnf->shell_default = arg->val;
 269
 270         if ((arg = getarg(args, 'w')) != NULL)
 271                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 272         if (mode == M_ADD && getarg(args, 'D')) {
 273                 if (getarg(args, 'n') != NULL)
 274                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 275                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 276                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 277                                 cnf->min_uid = 1000;
 278                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 279                                 cnf->max_uid = 32000;
 280                 }
 281                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 282                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 283                                 cnf->min_gid = 1000;
 284                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 285                                 cnf->max_gid = 32000;
 286                 }
 287
 288                 arg = getarg(args, 'C');
 289                 if (write_userconfig(arg ? arg->val : NULL))
 290                         return EXIT_SUCCESS;
 291                 warn("config update");
 292                 return EX_IOERR;
 293         }
 294
 295         if (mode == M_PRINT && getarg(args, 'a')) {
 296                 int             pretty = getarg(args, 'P') != NULL;
 297                 int             v7 = getarg(args, '7') != NULL;
 298                 SETPWENT();
 299                 while ((pwd = GETPWENT()) != NULL)
 300                         print_user(pwd, pretty, v7);
 301                 ENDPWENT();
 302                 return EXIT_SUCCESS;
 303         }
 304
 305         if ((a_name = getarg(args, 'n')) != NULL)
 306                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 307         a_uid = getarg(args, 'u');
 308
 309         if (a_uid == NULL) {
 310                 if (a_name == NULL)
 311                         errx(EX_DATAERR, "user name or id required");
 312
 313                 /*
 314                  * Determine whether 'n' switch is name or uid - we don't
 315                  * really don't really care which we have, but we need to
 316                  * know.
 317                  */
 318                 if (mode != M_ADD && pwd == NULL
 319                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 320                     && *a_name->val) {
 321                         (a_uid = a_name)->ch = 'u';
 322                         a_name = NULL;
 323                 }
 324         } else {
 325                 if (strspn(a_uid->val, "0123456789") != strlen(a_uid->val))
 326                         errx(EX_USAGE, "-u expects a number");
 327         }
 328
 329         /*
 330          * Update, delete & print require that the user exists
 331          */
 332         if (mode == M_UPDATE || mode == M_DELETE ||
 333             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 334
 335                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 336                         pwd = GETPWUID(atoi(a_uid->val));
 337
 338                 if (pwd == NULL) {
 339                         if (mode == M_PRINT && getarg(args, 'F')) {
 340                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 341                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 342                                 return print_user(&fakeuser,
 343                                                   getarg(args, 'P') != NULL,
 344                                                   getarg(args, '7') != NULL);
 345                         }
 346                         if (a_name == NULL)
 347                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 348                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 349                 }
 350
 351                 if (a_name == NULL)     /* May be needed later */
 352                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 353
 354                 /*
 355                  * The M_LOCK and M_UNLOCK functions simply add or remove
 356                  * a "*LOCKED*" prefix from in front of the password to
 357                  * prevent it decoding correctly, and therefore prevents
 358                  * access. Of course, this only prevents access via
 359                  * password authentication (not ssh, kerberos or any
 360                  * other method that does not use the UNIX password) but
 361                  * that is a known limitation.
 362                  */
 363
 364                 if (mode == M_LOCK) {
 365                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 366                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 367                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 368                         if (passtmp == NULL)    /* disaster */
 369                                 errx(EX_UNAVAILABLE, "out of memory");
 370                         strcpy(passtmp, locked_str);
 371                         strcat(passtmp, pwd->pw_passwd);
 372                         pwd->pw_passwd = passtmp;
 373                         edited = 1;
 374                 } else if (mode == M_UNLOCK) {
 375                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 376                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 377                         pwd->pw_passwd += sizeof(locked_str)-1;
 378                         edited = 1;
 379                 } else if (mode == M_DELETE) {
 380                         /*
 381                          * Handle deletions now
 382                          */
 383                         char            file[MAXPATHLEN];
 384                         char            home[MAXPATHLEN];
 385                         uid_t           uid = pwd->pw_uid;
 386                         struct group    *gr;
 387                         char            grname[LOGNAMESIZE];
 388
 389                         if (strcmp(pwd->pw_name, "root") == 0)
 390                                 errx(EX_DATAERR, "cannot remove user 'root'");
 391
 392                         if (!PWALTDIR()) {
 393                                 /*
 394                                  * Remove opie record from /etc/opiekeys
 395                                  */
 396
 397                                 rmopie(pwd->pw_name);
 398
 399                                 /*
 400                                  * Remove crontabs
 401                                  */
 402                                 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
 403                                 if (access(file, F_OK) == 0) {
 404                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 405                                         system(file);
 406                                 }
 407                         }
 408                         /*
 409                          * Save these for later, since contents of pwd may be
 410                          * invalidated by deletion
 411                          */
 412                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 413                         strlcpy(home, pwd->pw_dir, sizeof(home));
 414                         gr = GETGRGID(pwd->pw_gid);
 415                         if (gr != NULL)
 416                                 strlcpy(grname, gr->gr_name, LOGNAMESIZE);
 417                         else
 418                                 grname[0] = '\0';
 419
 420                         rc = delpwent(pwd);
 421                         if (rc == -1)
 422                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 423                         else if (rc != 0) {
 424                                 warn("passwd update");
 425                                 return EX_IOERR;
 426                         }
 427
 428                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 429                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 430                                 if (rc == -1)
 431                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 432                                 else if (rc != 0)
 433                                         warn("WARNING: NIS passwd update");
 434                                 /* non-fatal */
 435                         }
 436
 437                         grp = GETGRNAM(a_name->val);
 438                         if (grp != NULL &&
 439                             (grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
 440                             strcmp(a_name->val, grname) == 0)
 441                                 delgrent(GETGRNAM(a_name->val));
 442                         SETGRENT();
 443                         while ((grp = GETGRENT()) != NULL) {
 444                                 int i, j;
 445                                 char group[MAXLOGNAME];
 446                                 if (grp->gr_mem != NULL) {
 447                                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
 448                                                 if (!strcmp(grp->gr_mem[i], a_name->val)) {
 449                                                         for (j = i; grp->gr_mem[j] != NULL; j++)
 450                                                                 grp->gr_mem[j] = grp->gr_mem[j+1];
 451                                                         strlcpy(group, grp->gr_name, MAXLOGNAME);
 452                                                         chggrent(group, grp);
 453                                                 }
 454                                         }
 455                                 }
 456                         }
 457                         ENDGRENT();
 458
 459                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 460
 461                         if (!PWALTDIR()) {
 462                                 /*
 463                                  * Remove mail file
 464                                  */
 465                                 remove(file);
 466
 467                                 /*
 468                                  * Remove at jobs
 469                                  */
 470                                 if (getpwuid(uid) == NULL)
 471                                         rmat(uid);
 472
 473                                 /*
 474                                  * Remove home directory and contents
 475                                  */
 476                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 477                                         if (stat(home, &st) != -1) {
 478                                                 rm_r(home, uid);
 479                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 480                                                        a_name->val, (long) uid, home,
 481                                                        stat(home, &st) == -1 ? "" : "not completely ");
 482                                         }
 483                                 }
 484                         }
 485                         return EXIT_SUCCESS;
 486                 } else if (mode == M_PRINT)
 487                         return print_user(pwd,
 488                                           getarg(args, 'P') != NULL,
 489                                           getarg(args, '7') != NULL);
 490
 491                 /*
 492                  * The rest is edit code
 493                  */
 494                 if ((arg = getarg(args, 'l')) != NULL) {
 495                         if (strcmp(pwd->pw_name, "root") == 0)
 496                                 errx(EX_DATAERR, "can't rename `root' account");
 497                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 498                         edited = 1;
 499                 }
 500
 501                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 502                         pwd->pw_uid = (uid_t) atol(arg->val);
 503                         edited = 1;
 504                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 505                                 errx(EX_DATAERR, "can't change uid of `root' account");
 506                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 507                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 508                 }
 509
 510                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 511                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 512                         if (newgid != pwd->pw_gid) {
 513                                 edited = 1;
 514                                 pwd->pw_gid = newgid;
 515                         }
 516                 }
 517
 518                 if ((arg = getarg(args, 'p')) != NULL) {
 519                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 520                                 if (pwd->pw_change != 0) {
 521                                         pwd->pw_change = 0;
 522                                         edited = 1;
 523                                 }
 524                         }
 525                         else {
 526                                 time_t          now = time(NULL);
 527                                 time_t          expire = parse_date(now, arg->val);
 528
 529                                 if (pwd->pw_change != expire) {
 530                                         pwd->pw_change = expire;
 531                                         edited = 1;
 532                                 }
 533                         }
 534                 }
 535
 536                 if ((arg = getarg(args, 'e')) != NULL) {
 537                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 538                                 if (pwd->pw_expire != 0) {
 539                                         pwd->pw_expire = 0;
 540                                         edited = 1;
 541                                 }
 542                         }
 543                         else {
 544                                 time_t          now = time(NULL);
 545                                 time_t          expire = parse_date(now, arg->val);
 546
 547                                 if (pwd->pw_expire != expire) {
 548                                         pwd->pw_expire = expire;
 549                                         edited = 1;
 550                                 }
 551                         }
 552                 }
 553
 554                 if ((arg = getarg(args, 's')) != NULL) {
 555                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 556                         if (shell == NULL)
 557                                 shell = "";
 558                         if (strcmp(shell, pwd->pw_shell) != 0) {
 559                                 pwd->pw_shell = shell;
 560                                 edited = 1;
 561                         }
 562                 }
 563
 564                 if (getarg(args, 'L')) {
 565                         if (cnf->default_class == NULL)
 566                                 cnf->default_class = "";
 567                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 568                                 pwd->pw_class = cnf->default_class;
 569                                 edited = 1;
 570                         }
 571                 }
 572
 573                 if ((arg  = getarg(args, 'd')) != NULL) {
 574                         if (strcmp(pwd->pw_dir, arg->val))
 575                                 edited = 1;
 576                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 577                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 578                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 579                         } else if (!S_ISDIR(st.st_mode))
 580                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 581                 }
 582
 583                 if ((arg = getarg(args, 'w')) != NULL &&
 584                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 585                         login_cap_t *lc;
 586
 587                         lc = login_getpwclass(pwd);
 588                         if (lc == NULL ||
 589                             login_setcryptfmt(lc, "sha512", NULL) == NULL)
 590                                 warn("setting crypt(3) format");
 591                         login_close(lc);
 592                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 593                         edited = 1;
 594                 }
 595
 596         } else {
 597                 login_cap_t *lc;
 598
 599                 /*
 600                  * Add code
 601                  */
 602
 603                 if (a_name == NULL)     /* Required */
 604                         errx(EX_DATAERR, "login name required");
 605                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 606                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 607
 608                 /*
 609                  * Now, set up defaults for a new user
 610                  */
 611                 pwd = &fakeuser;
 612                 pwd->pw_name = a_name->val;
 613                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 614                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 615                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 616                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 617                 pwd->pw_expire = pw_exppolicy(cnf, args);
 618                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 619                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 620                 lc = login_getpwclass(pwd);
 621                 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
 622                         warn("setting crypt(3) format");
 623                 login_close(lc);
 624                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 625                 edited = 1;
 626
 627                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 628                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 629         }
 630
 631         /*
 632          * Shared add/edit code
 633          */
 634         if ((arg = getarg(args, 'c')) != NULL) {
 635                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 636                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 637                         pwd->pw_gecos = gecos;
 638                         edited = 1;
 639                 }
 640         }
 641
 642         if ((arg = getarg(args, 'h')) != NULL ||
 643             (arg = getarg(args, 'H')) != NULL) {
 644                 if (strcmp(arg->val, "-") == 0) {
 645                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 646                                 pwd->pw_passwd = "*";   /* No access */
 647                                 edited = 1;
 648                         }
 649                 } else {
 650                         int             fd = atoi(arg->val);
 651                         int             precrypt = (arg->ch == 'H');
 652                         int             b;
 653                         int             istty = isatty(fd);
 654                         struct termios  t;
 655                         login_cap_t     *lc;
 656
 657                         if (istty) {
 658                                 if (tcgetattr(fd, &t) == -1)
 659                                         istty = 0;
 660                                 else {
 661                                         struct termios  n = t;
 662
 663                                         /* Disable echo */
 664                                         n.c_lflag &= ~(ECHO);
 665                                         tcsetattr(fd, TCSANOW, &n);
 666                                         printf("%s%spassword for user %s:",
 667                                              (mode == M_UPDATE) ? "new " : "",
 668                                              precrypt ? "encrypted " : "",
 669                                              pwd->pw_name);
 670                                         fflush(stdout);
 671                                 }
 672                         }
 673                         b = read(fd, line, sizeof(line) - 1);
 674                         if (istty) {    /* Restore state */
 675                                 tcsetattr(fd, TCSANOW, &t);
 676                                 fputc('\n', stdout);
 677                                 fflush(stdout);
 678                         }
 679                         if (b < 0) {
 680                                 warn("-%c file descriptor", precrypt ? 'H' :
 681                                     'h');
 682                                 return EX_IOERR;
 683                         }
 684                         line[b] = '\0';
 685                         if ((p = strpbrk(line, "\r\n")) != NULL)
 686                                 *p = '\0';
 687                         if (!*line)
 688                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 689                         if (precrypt) {
 690                                 if (strchr(line, ':') != NULL)
 691                                         return EX_DATAERR;
 692                                 pwd->pw_passwd = line;
 693                         } else {
 694                                 lc = login_getpwclass(pwd);
 695                                 if (lc == NULL ||
 696                                     login_setcryptfmt(lc, "sha512", NULL) == NULL)
 697                                         warn("setting crypt(3) format");
 698                                 login_close(lc);
 699                                 pwd->pw_passwd = pw_pwcrypt(line);
 700                         }
 701                         edited = 1;
 702                 }
 703         }
 704
 705         /*
 706          * Special case: -N only displays & exits
 707          */
 708         if (getarg(args, 'N') != NULL)
 709                 return print_user(pwd,
 710                                   getarg(args, 'P') != NULL,
 711                                   getarg(args, '7') != NULL);
 712
 713         if (mode == M_ADD) {
 714                 edited = 1;     /* Always */
 715                 rc = addpwent(pwd);
 716                 if (rc == -1) {
 717                         warnx("user '%s' already exists", 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 = addnispwent(cnf->nispasswd, pwd);
 725                         if (rc == -1)
 726                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 727                         else
 728                                 warn("NIS passwd update");
 729                         /* NOTE: we treat NIS-only update errors as non-fatal */
 730                 }
 731         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 732                 if (edited) {   /* Only updated this if required */
 733                         rc = chgpwent(a_name->val, pwd);
 734                         if (rc == -1) {
 735                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 736                                 return EX_IOERR;
 737                         } else if (rc != 0) {
 738                                 warn("passwd file update");
 739                                 return EX_IOERR;
 740                         }
 741                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 742                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 743                                 if (rc == -1)
 744                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 745                                 else
 746                                         warn("NIS passwd update");
 747                                 /* NOTE: NIS-only update errors are not fatal */
 748                         }
 749                 }
 750         }
 751
 752         /*
 753          * Ok, user is created or changed - now edit group file
 754          */
 755
 756         if (mode == M_ADD || getarg(args, 'G') != NULL) {
 757                 int i, j;
 758                 /* First remove the user from all group */
 759                 SETGRENT();
 760                 while ((grp = GETGRENT()) != NULL) {
 761                         char group[MAXLOGNAME];
 762                         if (grp->gr_mem == NULL)
 763                                 continue;
 764                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
 765                                 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0)
 766                                         continue;
 767                                 for (j = i; grp->gr_mem[j] != NULL ; j++)
 768                                         grp->gr_mem[j] = grp->gr_mem[j+1];
 769                                 strlcpy(group, grp->gr_name, MAXLOGNAME);
 770                                 chggrent(group, grp);
 771                         }
 772                 }
 773                 ENDGRENT();
 774
 775                 /* now add to group where needed */
 776                 for (i = 0; cnf->groups[i] != NULL; i++) {
 777                         grp = GETGRNAM(cnf->groups[i]);
 778                         grp = gr_add(grp, pwd->pw_name);
 779                         /*
 780                          * grp can only be NULL in 2 cases:
 781                          * - the new member is already a member
 782                          * - a problem with memory occurs
 783                          * in both cases we want to skip now.
 784                          */
 785                         if (grp == NULL)
 786                                 continue;
 787                         chggrent(cnf->groups[i], grp);
 788                         free(grp);
 789                 }
 790         }
 791
 792
 793         /* go get a current version of pwd */
 794         pwd = GETPWNAM(a_name->val);
 795         if (pwd == NULL) {
 796                 /* This will fail when we rename, so special case that */
 797                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 798                         a_name->val = arg->val;         /* update new name */
 799                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 800                 }
 801         }
 802         if (pwd == NULL)        /* can't go on without this */
 803                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 804
 805         grp = GETGRGID(pwd->pw_gid);
 806         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 807                pwd->pw_name, (long) pwd->pw_uid,
 808             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 809                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 810
 811         /*
 812          * If adding, let's touch and chown the user's mail file. This is not
 813          * strictly necessary under BSD with a 0755 maildir but it also
 814          * doesn't hurt anything to create the empty mailfile
 815          */
 816         if (mode == M_ADD) {
 817                 if (!PWALTDIR()) {
 818                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 819                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 820                                                                          * mtime */
 821                         chown(line, pwd->pw_uid, pwd->pw_gid);
 822                 }
 823         }
 824
 825         /*
 826          * Let's create and populate the user's home directory. Note
 827          * that this also `works' for editing users if -m is used, but
 828          * existing files will *not* be overwritten.
 829          */
 830         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 831                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 832                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 833                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 834         }
 835
 836
 837         /*
 838          * Finally, send mail to the new user as well, if we are asked to
 839          */
 840         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 841                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 842
 843                 if (pfp == NULL)
 844                         warn("sendmail");
 845                 else {
 846                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 847                         while (fgets(line, sizeof(line), fp) != NULL) {
 848                                 /* Do substitutions? */
 849                                 fputs(line, pfp);
 850                         }
 851                         pclose(pfp);
 852                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 853                             pwd->pw_name, (long) pwd->pw_uid);
 854                 }
 855                 fclose(fp);
 856         }
 857
 858         return EXIT_SUCCESS;
 859 }
 860
 861
 862 static          uid_t
 863 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 864 {
 865         struct passwd  *pwd;
 866         uid_t           uid = (uid_t) - 1;
 867         struct carg    *a_uid = getarg(args, 'u');
 868
 869         /*
 870          * Check the given uid, if any
 871          */
 872         if (a_uid != NULL) {
 873                 uid = (uid_t) atol(a_uid->val);
 874
 875                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 876                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 877         } else {
 878                 struct bitmap   bm;
 879
 880                 /*
 881                  * We need to allocate the next available uid under one of
 882                  * two policies a) Grab the first unused uid b) Grab the
 883                  * highest possible unused uid
 884                  */
 885                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 886                                                          * claus^H^H^H^Hheck */
 887                         cnf->min_uid = 1000;
 888                         cnf->max_uid = 32000;
 889                 }
 890                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 891
 892                 /*
 893                  * Now, let's fill the bitmap from the password file
 894                  */
 895                 SETPWENT();
 896                 while ((pwd = GETPWENT()) != NULL)
 897                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 898                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 899                 ENDPWENT();
 900
 901                 /*
 902                  * Then apply the policy, with fallback to reuse if necessary
 903                  */
 904                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 905                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 906
 907                 /*
 908                  * Another sanity check
 909                  */
 910                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 911                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 912                 bm_dealloc(&bm);
 913         }
 914         return uid;
 915 }
 916
 917
 918 static          uid_t
 919 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 920 {
 921         struct group   *grp;
 922         gid_t           gid = (uid_t) - 1;
 923         struct carg    *a_gid = getarg(args, 'g');
 924
 925         /*
 926          * If no arg given, see if default can help out
 927          */
 928         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 929                 a_gid = addarg(args, 'g', cnf->default_group);
 930
 931         /*
 932          * Check the given gid, if any
 933          */
 934         SETGRENT();
 935         if (a_gid != NULL) {
 936                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 937                         gid = (gid_t) atol(a_gid->val);
 938                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 939                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 940                 }
 941                 gid = grp->gr_gid;
 942         } else if ((grp = GETGRNAM(nam)) != NULL &&
 943             (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) {
 944                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 945         } else {
 946                 struct cargs    grpargs;
 947                 char            tmp[32];
 948
 949                 LIST_INIT(&grpargs);
 950                 addarg(&grpargs, 'n', nam);
 951
 952                 /*
 953                  * We need to auto-create a group with the user's name. We
 954                  * can send all the appropriate output to our sister routine
 955                  * bit first see if we can create a group with gid==uid so we
 956                  * can keep the user and group ids in sync. We purposely do
 957                  * NOT check the gid range if we can force the sync. If the
 958                  * user's name dups an existing group, then the group add
 959                  * function will happily handle that case for us and exit.
 960                  */
 961                 if (GETGRGID(prefer) == NULL) {
 962                         sprintf(tmp, "%lu", (unsigned long) prefer);
 963                         addarg(&grpargs, 'g', tmp);
 964                 }
 965                 if (getarg(args, 'N'))
 966                 {
 967                         addarg(&grpargs, 'N', NULL);
 968                         addarg(&grpargs, 'q', NULL);
 969                         gid = pw_group(cnf, M_NEXT, &grpargs);
 970                 }
 971                 else
 972                 {
 973                         pw_group(cnf, M_ADD, &grpargs);
 974                         if ((grp = GETGRNAM(nam)) != NULL)
 975                                 gid = grp->gr_gid;
 976                 }
 977                 a_gid = LIST_FIRST(&grpargs);
 978                 while (a_gid != NULL) {
 979                         struct carg    *t = LIST_NEXT(a_gid, list);
 980                         LIST_REMOVE(a_gid, list);
 981                         a_gid = t;
 982                 }
 983         }
 984         ENDGRENT();
 985         return gid;
 986 }
 987
 988
 989 static          time_t
 990 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 991 {
 992         time_t          result = 0;
 993         time_t          now = time(NULL);
 994         struct carg    *arg = getarg(args, 'p');
 995
 996         if (arg != NULL) {
 997                 if ((result = parse_date(now, arg->val)) == now)
 998                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 999         } else if (cnf->password_days > 0)
1000                 result = now + ((long) cnf->password_days * 86400L);
1001         return result;
1002 }
1003
1004
1005 static          time_t
1006 pw_exppolicy(struct userconf * cnf, struct cargs * args)
1007 {
1008         time_t          result = 0;
1009         time_t          now = time(NULL);
1010         struct carg    *arg = getarg(args, 'e');
1011
1012         if (arg != NULL) {
1013                 if ((result = parse_date(now, arg->val)) == now)
1014                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
1015         } else if (cnf->expire_days > 0)
1016                 result = now + ((long) cnf->expire_days * 86400L);
1017         return result;
1018 }
1019
1020
1021 static char    *
1022 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
1023 {
1024         struct carg    *arg = getarg(args, 'd');
1025
1026         if (arg)
1027                 return arg->val;
1028         else {
1029                 static char     home[128];
1030
1031                 if (cnf->home == NULL || *cnf->home == '\0')
1032                         errx(EX_CONFIG, "no base home directory set");
1033                 sprintf(home, "%s/%s", cnf->home, user);
1034                 return home;
1035         }
1036 }
1037
1038 static char    *
1039 shell_path(char const * path, char *shells[], char *sh)
1040 {
1041         if (sh != NULL && (*sh == '/' || *sh == '\0'))
1042                 return sh;      /* specified full path or forced none */
1043         else {
1044                 char           *p;
1045                 char            paths[_UC_MAXLINE];
1046
1047                 /*
1048                  * We need to search paths
1049                  */
1050                 strlcpy(paths, path, sizeof(paths));
1051                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
1052                         int             i;
1053                         static char     shellpath[256];
1054
1055                         if (sh != NULL) {
1056                                 sprintf(shellpath, "%s/%s", p, sh);
1057                                 if (access(shellpath, X_OK) == 0)
1058                                         return shellpath;
1059                         } else
1060                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
1061                                         sprintf(shellpath, "%s/%s", p, shells[i]);
1062                                         if (access(shellpath, X_OK) == 0)
1063                                                 return shellpath;
1064                                 }
1065                 }
1066                 if (sh == NULL)
1067                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1068                 errx(EX_CONFIG, "no default shell available or defined");
1069                 return NULL;
1070         }
1071 }
1072
1073
1074 static char    *
1075 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1076 {
1077         char           *sh = newshell;
1078         struct carg    *arg = getarg(args, 's');
1079
1080         if (newshell == NULL && arg != NULL)
1081                 sh = arg->val;
1082         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1083 }
1084
1085 #define SALTSIZE        32
1086
1087 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1088
1089 char           *
1090 pw_pwcrypt(char *password)
1091 {
1092         int             i;
1093         char            salt[SALTSIZE + 1];
1094         char            *cryptpw;
1095
1096         static char     buf[256];
1097
1098         /*
1099          * Calculate a salt value
1100          */
1101         for (i = 0; i < SALTSIZE; i++)
1102                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1103         salt[SALTSIZE] = '\0';
1104
1105         cryptpw = crypt(password, salt);
1106         if (cryptpw == NULL)
1107                 errx(EX_CONFIG, "crypt(3) failure");
1108         return strcpy(buf, cryptpw);
1109 }
1110
1111
1112 static char    *
1113 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1114 {
1115         int             i, l;
1116         char            pwbuf[32];
1117
1118         switch (cnf->default_password) {
1119         case -1:                /* Random password */
1120                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1121                 for (i = 0; i < l; i++)
1122                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1123                 pwbuf[i] = '\0';
1124
1125                 /*
1126                  * We give this information back to the user
1127                  */
1128                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1129                     getarg(args, 'N') == NULL) {
1130                         if (isatty(STDOUT_FILENO))
1131                                 printf("Password for '%s' is: ", user);
1132                         printf("%s\n", pwbuf);
1133                         fflush(stdout);
1134                 }
1135                 break;
1136
1137         case -2:                /* No password at all! */
1138                 return "";
1139
1140         case 0:         /* No login - default */
1141         default:
1142                 return "*";
1143
1144         case 1:         /* user's name */
1145                 strlcpy(pwbuf, user, sizeof(pwbuf));
1146                 break;
1147         }
1148         return pw_pwcrypt(pwbuf);
1149 }
1150
1151
1152 static int
1153 print_user(struct passwd * pwd, int pretty, int v7)
1154 {
1155         if (!pretty) {
1156                 char            *buf;
1157
1158                 if (!v7)
1159                         pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*";
1160
1161                 buf = v7 ? pw_make_v7(pwd) : pw_make(pwd);
1162                 printf("%s\n", buf);
1163                 free(buf);
1164         } else {
1165                 int             j;
1166                 char           *p;
1167                 struct group   *grp = GETGRGID(pwd->pw_gid);
1168                 char            uname[60] = "User &", office[60] = "[None]",
1169                                 wphone[60] = "[None]", hphone[60] = "[None]";
1170                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1171                 struct tm *    tptr;
1172
1173                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1174                         strlcpy(uname, p, sizeof(uname));
1175                         if ((p = strtok(NULL, ",")) != NULL) {
1176                                 strlcpy(office, p, sizeof(office));
1177                                 if ((p = strtok(NULL, ",")) != NULL) {
1178                                         strlcpy(wphone, p, sizeof(wphone));
1179                                         if ((p = strtok(NULL, "")) != NULL) {
1180                                                 strlcpy(hphone, p,
1181                                                     sizeof(hphone));
1182                                         }
1183                                 }
1184                         }
1185                 }
1186                 /*
1187                  * Handle '&' in gecos field
1188                  */
1189                 if ((p = strchr(uname, '&')) != NULL) {
1190                         int             l = strlen(pwd->pw_name);
1191                         int             m = strlen(p);
1192
1193                         memmove(p + l, p + 1, m);
1194                         memmove(p, pwd->pw_name, l);
1195                         *p = (char) toupper((unsigned char)*p);
1196                 }
1197                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1198                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1199                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1200                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1201                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1202                        " Full Name: %s\n"
1203                        "      Home: %-26.26s      Class: %s\n"
1204                        "     Shell: %-26.26s     Office: %s\n"
1205                        "Work Phone: %-26.26s Home Phone: %s\n"
1206                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1207                        pwd->pw_name, (long) pwd->pw_uid,
1208                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1209                        uname, pwd->pw_dir, pwd->pw_class,
1210                        pwd->pw_shell, office, wphone, hphone,
1211                        acexpire, pwexpire);
1212                 SETGRENT();
1213                 j = 0;
1214                 while ((grp=GETGRENT()) != NULL)
1215                 {
1216                         int     i = 0;
1217                         if (grp->gr_mem != NULL) {
1218                                 while (grp->gr_mem[i] != NULL)
1219                                 {
1220                                         if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1221                                         {
1222                                                 printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1223                                                 break;
1224                                         }
1225                                         ++i;
1226                                 }
1227                         }
1228                 }
1229                 ENDGRENT();
1230                 printf("%s", j ? "\n" : "");
1231         }
1232         return EXIT_SUCCESS;
1233 }
1234
1235 char    *
1236 pw_checkname(u_char *name, int gecos)
1237 {
1238         char showch[8];
1239         u_char const *badchars, *ch, *showtype;
1240         int reject;
1241
1242         ch = name;
1243         reject = 0;
1244         if (gecos) {
1245                 /* See if the name is valid as a gecos (comment) field. */
1246                 badchars = ":!@";
1247                 showtype = "gecos field";
1248         } else {
1249                 /* See if the name is valid as a userid or group. */
1250                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1251                 showtype = "userid/group name";
1252                 /* Userids and groups can not have a leading '-'. */
1253                 if (*ch == '-')
1254                         reject = 1;
1255         }
1256         if (!reject) {
1257                 while (*ch) {
1258                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1259                             *ch == 127) {
1260                                 reject = 1;
1261                                 break;
1262                         }
1263                         /* 8-bit characters are only allowed in GECOS fields */
1264                         if (!gecos && (*ch & 0x80)) {
1265                                 reject = 1;
1266                                 break;
1267                         }
1268                         ch++;
1269                 }
1270         }
1271         /*
1272          * A `$' is allowed as the final character for userids and groups,
1273          * mainly for the benefit of samba.
1274          */
1275         if (reject && !gecos) {
1276                 if (*ch == '$' && *(ch + 1) == '\0') {
1277                         reject = 0;
1278                         ch++;
1279                 }
1280         }
1281         if (reject) {
1282                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1283                     ? "`%c'" : "0x%02x", *ch);
1284                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
1285                     showch, (ch - name), showtype);
1286         }
1287         if (!gecos && (ch - name) > LOGNAMESIZE)
1288                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1289                     LOGNAMESIZE);
1290         return (char *)name;
1291 }
1292
1293
1294 static void
1295 rmat(uid_t uid)
1296 {
1297         DIR            *d = opendir("/var/at/jobs");
1298
1299         if (d != NULL) {
1300                 struct dirent  *e;
1301
1302                 while ((e = readdir(d)) != NULL) {
1303                         struct stat     st;
1304
1305                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1306                             stat(e->d_name, &st) == 0 &&
1307                             !S_ISDIR(st.st_mode) &&
1308                             st.st_uid == uid) {
1309                                 char            tmp[MAXPATHLEN];
1310
1311                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1312                                 system(tmp);
1313                         }
1314                 }
1315                 closedir(d);
1316         }
1317 }
1318
1319 static void
1320 rmopie(char const * name)
1321 {
1322         static const char etcopie[] = "/etc/opiekeys";
1323         FILE   *fp = fopen(etcopie, "r+");
1324
1325         if (fp != NULL) {
1326                 char    tmp[1024];
1327                 off_t   atofs = 0;
1328                 int     length = strlen(name);
1329
1330                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1331                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1332                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1333                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1334                                 }
1335                                 break;
1336                         }
1337                         atofs = ftell(fp);
1338                 }
1339                 /*
1340                  * If we got an error of any sort, don't update!
1341                  */
1342                 fclose(fp);
1343         }
1344 }
1345