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 <login_cap.h>
  44 #include <pwd.h>
  45 #include <grp.h>
  46 #include <libutil.h>
  47 #include "pw.h"
  48 #include "bitmap.h"
  49
  50 #define LOGNAMESIZE (MAXLOGNAME-1)
  51
  52 static          char locked_str[] = "*LOCKED*";
  53
  54 static int      print_user(struct passwd * pwd, int pretty, int v7);
  55 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  56 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  57 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  58 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  59 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  60 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  61 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  62 static char    *shell_path(char const * path, char *shells[], char *sh);
  63 static void     rmat(uid_t uid);
  64 static void     rmopie(char const * name);
  65
  66 /*-
  67  * -C config      configuration file
  68  * -q             quiet operation
  69  * -n name        login name
  70  * -u uid         user id
  71  * -c comment     user name/comment
  72  * -d directory   home directory
  73  * -e date        account expiry date
  74  * -p date        password expiry date
  75  * -g grp         primary group
  76  * -G grp1,grp2   additional groups
  77  * -m [ -k dir ]  create and set up home
  78  * -s shell       name of login shell
  79  * -o             duplicate uid ok
  80  * -L class       user class
  81  * -l name        new login name
  82  * -h fd          password filehandle
  83  * -H fd          encrypted password filehandle
  84  * -F             force print or add
  85  *   Setting defaults:
  86  * -D             set user defaults
  87  * -b dir         default home root dir
  88  * -e period      default expiry period
  89  * -p period      default password change period
  90  * -g group       default group
  91  * -G             grp1,grp2.. default additional groups
  92  * -L class       default login class
  93  * -k dir         default home skeleton
  94  * -s shell       default shell
  95  * -w method      default password method
  96  */
  97
  98 int
  99 pw_user(struct userconf * cnf, int mode, struct cargs * args)
 100 {
 101         int             rc, edited = 0;
 102         char           *p = NULL;
 103         char                                     *passtmp;
 104         struct carg    *a_name;
 105         struct carg    *a_uid;
 106         struct carg    *arg;
 107         struct passwd  *pwd = NULL;
 108         struct group   *grp;
 109         struct stat     st;
 110         char            line[_PASSWORD_LEN+1];
 111         FILE           *fp;
 112         char *dmode_c;
 113         void *set = NULL;
 114
 115         static struct passwd fakeuser =
 116         {
 117                 NULL,
 118                 "*",
 119                 -1,
 120                 -1,
 121                 0,
 122                 "",
 123                 "User &",
 124                 "/nonexistent",
 125                 "/bin/sh",
 126                 0
 127 #if defined(__FreeBSD__)
 128                 ,0
 129 #endif
 130         };
 131
 132
 133         /*
 134          * With M_NEXT, we only need to return the
 135          * next uid to stdout
 136          */
 137         if (mode == M_NEXT)
 138         {
 139                 uid_t next = pw_uidpolicy(cnf, args);
 140                 if (getarg(args, 'q'))
 141                         return next;
 142                 printf("%ld:", (long)next);
 143                 pw_group(cnf, mode, args);
 144                 return EXIT_SUCCESS;
 145         }
 146
 147         /*
 148          * We can do all of the common legwork here
 149          */
 150
 151         if ((arg = getarg(args, 'b')) != NULL) {
 152                 cnf->home = arg->val;
 153         }
 154
 155         if ((arg = getarg(args, 'M')) != NULL) {
 156                 dmode_c = arg->val;
 157                 if ((set = setmode(dmode_c)) == NULL)
 158                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 159                             dmode_c);
 160                 cnf->homemode = getmode(set, _DEF_DIRMODE);
 161                 free(set);
 162         }
 163
 164         /*
 165          * If we'll need to use it or we're updating it,
 166          * then create the base home directory if necessary
 167          */
 168         if (arg != NULL || getarg(args, 'm') != NULL) {
 169                 int     l = strlen(cnf->home);
 170
 171                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 172                         cnf->home[--l] = '\0';
 173
 174                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 175                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 176
 177                 if (stat(cnf->home, &st) == -1) {
 178                         char    dbuf[MAXPATHLEN];
 179
 180                         /*
 181                          * This is a kludge especially for Joerg :)
 182                          * If the home directory would be created in the root partition, then
 183                          * we really create it under /usr which is likely to have more space.
 184                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 185                          */
 186                         if (strchr(cnf->home+1, '/') == NULL) {
 187                                 snprintf(dbuf, MAXPATHLEN, "/usr%s", cnf->home);
 188                                 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 189                                         chown(dbuf, 0, 0);
 190                                         /*
 191                                          * Skip first "/" and create symlink:
 192                                          * /home -> usr/home
 193                                          */
 194                                         symlink(dbuf+1, cnf->home);
 195                                 }
 196                                 /* If this falls, fall back to old method */
 197                         }
 198                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 199                         p = dbuf;
 200                         if (stat(dbuf, &st) == -1) {
 201                                 while ((p = strchr(p + 1, '/')) != NULL) {
 202                                         *p = '\0';
 203                                         if (stat(dbuf, &st) == -1) {
 204                                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1)
 205                                                         goto direrr;
 206                                                 chown(dbuf, 0, 0);
 207                                         } else if (!S_ISDIR(st.st_mode))
 208                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 209                                         *p = '/';
 210                                 }
 211                         }
 212                         if (stat(dbuf, &st) == -1) {
 213                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1) {
 214                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 215                                 }
 216                                 chown(dbuf, 0, 0);
 217                         }
 218                 } else if (!S_ISDIR(st.st_mode))
 219                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 220         }
 221
 222         if ((arg = getarg(args, 'e')) != NULL)
 223                 cnf->expire_days = atoi(arg->val);
 224
 225         if ((arg = getarg(args, 'y')) != NULL)
 226                 cnf->nispasswd = arg->val;
 227
 228         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 229                 cnf->password_days = atoi(arg->val);
 230
 231         if ((arg = getarg(args, 'g')) != NULL) {
 232                 if (!*(p = arg->val))   /* Handle empty group list specially */
 233                         cnf->default_group = "";
 234                 else {
 235                         if ((grp = GETGRNAM(p)) == NULL) {
 236                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 237                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 238                         }
 239                         cnf->default_group = newstr(grp->gr_name);
 240                 }
 241         }
 242         if ((arg = getarg(args, 'L')) != NULL)
 243                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 244
 245         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 246                 int i = 0;
 247
 248                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 249                         if ((grp = GETGRNAM(p)) == NULL) {
 250                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 251                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 252                         }
 253                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 254                                 cnf->groups[i++] = newstr(grp->gr_name);
 255                 }
 256                 while (i < cnf->numgroups)
 257                         cnf->groups[i++] = NULL;
 258         }
 259
 260         if ((arg = getarg(args, 'k')) != NULL) {
 261                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 262                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 263         }
 264
 265         if ((arg = getarg(args, 's')) != NULL)
 266                 cnf->shell_default = arg->val;
 267
 268         if ((arg = getarg(args, 'w')) != NULL)
 269                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 270         if (mode == M_ADD && getarg(args, 'D')) {
 271                 if (getarg(args, 'n') != NULL)
 272                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 273                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 274                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 275                                 cnf->min_uid = 1000;
 276                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 277                                 cnf->max_uid = 32000;
 278                 }
 279                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 280                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 281                                 cnf->min_gid = 1000;
 282                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 283                                 cnf->max_gid = 32000;
 284                 }
 285
 286                 arg = getarg(args, 'C');
 287                 if (write_userconfig(arg ? arg->val : NULL))
 288                         return EXIT_SUCCESS;
 289                 err(EX_IOERR, "config udpate");
 290         }
 291
 292         if (mode == M_PRINT && getarg(args, 'a')) {
 293                 int             pretty = getarg(args, 'P') != NULL;
 294                 int             v7 = getarg(args, '7') != NULL;
 295                 SETPWENT();
 296                 while ((pwd = GETPWENT()) != NULL)
 297                         print_user(pwd, pretty, v7);
 298                 ENDPWENT();
 299                 return EXIT_SUCCESS;
 300         }
 301
 302         if ((a_name = getarg(args, 'n')) != NULL)
 303                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 304         a_uid = getarg(args, 'u');
 305
 306         if (a_uid == NULL) {
 307                 if (a_name == NULL)
 308                         errx(EX_DATAERR, "user name or id required");
 309
 310                 /*
 311                  * Determine whether 'n' switch is name or uid - we don't
 312                  * really don't really care which we have, but we need to
 313                  * know.
 314                  */
 315                 if (mode != M_ADD && pwd == NULL
 316                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 317                     && *a_name->val) {
 318                         (a_uid = a_name)->ch = 'u';
 319                         a_name = NULL;
 320                 }
 321         } else {
 322                 if (strspn(a_uid->val, "0123456789") != strlen(a_uid->val))
 323                         errx(EX_USAGE, "-u expects a number");
 324         }
 325
 326         /*
 327          * Update, delete & print require that the user exists
 328          */
 329         if (mode == M_UPDATE || mode == M_DELETE ||
 330             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 331
 332                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 333                         pwd = GETPWUID(atoi(a_uid->val));
 334
 335                 if (pwd == NULL) {
 336                         if (mode == M_PRINT && getarg(args, 'F')) {
 337                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 338                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 339                                 return print_user(&fakeuser,
 340                                                   getarg(args, 'P') != NULL,
 341                                                   getarg(args, '7') != NULL);
 342                         }
 343                         if (a_name == NULL)
 344                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 345                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 346                 }
 347
 348                 if (a_name == NULL)     /* May be needed later */
 349                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 350
 351                 /*
 352                  * The M_LOCK and M_UNLOCK functions simply add or remove
 353                  * a "*LOCKED*" prefix from in front of the password to
 354                  * prevent it decoding correctly, and therefore prevents
 355                  * access. Of course, this only prevents access via
 356                  * password authentication (not ssh, kerberos or any
 357                  * other method that does not use the UNIX password) but
 358                  * that is a known limitation.
 359                  */
 360
 361                 if (mode == M_LOCK) {
 362                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 363                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 364                         asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
 365                         if (passtmp == NULL)    /* disaster */
 366                                 errx(EX_UNAVAILABLE, "out of memory");
 367                         pwd->pw_passwd = passtmp;
 368                         edited = 1;
 369                 } else if (mode == M_UNLOCK) {
 370                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 371                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 372                         pwd->pw_passwd += sizeof(locked_str)-1;
 373                         edited = 1;
 374                 } else if (mode == M_DELETE) {
 375                         /*
 376                          * Handle deletions now
 377                          */
 378                         char            file[MAXPATHLEN];
 379                         char            home[MAXPATHLEN];
 380                         uid_t           uid = pwd->pw_uid;
 381                         struct group    *gr;
 382                         char            grname[LOGNAMESIZE];
 383
 384                         if (strcmp(pwd->pw_name, "root") == 0)
 385                                 errx(EX_DATAERR, "cannot remove user 'root'");
 386
 387                         if (!PWALTDIR()) {
 388                                 /*
 389                                  * Remove opie record from /etc/opiekeys
 390                                  */
 391
 392                                 rmopie(pwd->pw_name);
 393
 394                                 /*
 395                                  * Remove crontabs
 396                                  */
 397                                 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
 398                                 if (access(file, F_OK) == 0) {
 399                                         snprintf(file, sizeof(file), "crontab -u %s -r", pwd->pw_name);
 400                                         system(file);
 401                                 }
 402                         }
 403                         /*
 404                          * Save these for later, since contents of pwd may be
 405                          * invalidated by deletion
 406                          */
 407                         snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 408                         strlcpy(home, pwd->pw_dir, sizeof(home));
 409                         gr = GETGRGID(pwd->pw_gid);
 410                         if (gr != NULL)
 411                                 strlcpy(grname, gr->gr_name, LOGNAMESIZE);
 412                         else
 413                                 grname[0] = '\0';
 414
 415                         rc = delpwent(pwd);
 416                         if (rc == -1)
 417                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 418                         else if (rc != 0)
 419                                 err(EX_IOERR, "passwd update");
 420
 421                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 422                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 423                                 if (rc == -1)
 424                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 425                                 else if (rc != 0)
 426                                         warn("WARNING: NIS passwd update");
 427                                 /* non-fatal */
 428                         }
 429
 430                         grp = GETGRNAM(a_name->val);
 431                         if (grp != NULL &&
 432                             (grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
 433                             strcmp(a_name->val, grname) == 0)
 434                                 delgrent(GETGRNAM(a_name->val));
 435                         SETGRENT();
 436                         while ((grp = GETGRENT()) != NULL) {
 437                                 int i, j;
 438                                 char group[MAXLOGNAME];
 439                                 if (grp->gr_mem != NULL) {
 440                                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
 441                                                 if (!strcmp(grp->gr_mem[i], a_name->val)) {
 442                                                         for (j = i; grp->gr_mem[j] != NULL; j++)
 443                                                                 grp->gr_mem[j] = grp->gr_mem[j+1];
 444                                                         strlcpy(group, grp->gr_name, MAXLOGNAME);
 445                                                         chggrent(group, grp);
 446                                                 }
 447                                         }
 448                                 }
 449                         }
 450                         ENDGRENT();
 451
 452                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 453
 454                         if (!PWALTDIR()) {
 455                                 /*
 456                                  * Remove mail file
 457                                  */
 458                                 remove(file);
 459
 460                                 /*
 461                                  * Remove at jobs
 462                                  */
 463                                 if (getpwuid(uid) == NULL)
 464                                         rmat(uid);
 465
 466                                 /*
 467                                  * Remove home directory and contents
 468                                  */
 469                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 470                                         if (stat(home, &st) != -1) {
 471                                                 rm_r(home, uid);
 472                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 473                                                        a_name->val, (long) uid, home,
 474                                                        stat(home, &st) == -1 ? "" : "not completely ");
 475                                         }
 476                                 }
 477                         }
 478                         return EXIT_SUCCESS;
 479                 } else if (mode == M_PRINT)
 480                         return print_user(pwd,
 481                                           getarg(args, 'P') != NULL,
 482                                           getarg(args, '7') != NULL);
 483
 484                 /*
 485                  * The rest is edit code
 486                  */
 487                 if ((arg = getarg(args, 'l')) != NULL) {
 488                         if (strcmp(pwd->pw_name, "root") == 0)
 489                                 errx(EX_DATAERR, "can't rename `root' account");
 490                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 491                         edited = 1;
 492                 }
 493
 494                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 495                         pwd->pw_uid = (uid_t) atol(arg->val);
 496                         edited = 1;
 497                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 498                                 errx(EX_DATAERR, "can't change uid of `root' account");
 499                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 500                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 501                 }
 502
 503                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 504                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 505                         if (newgid != pwd->pw_gid) {
 506                                 edited = 1;
 507                                 pwd->pw_gid = newgid;
 508                         }
 509                 }
 510
 511                 if ((arg = getarg(args, 'p')) != NULL) {
 512                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 513                                 if (pwd->pw_change != 0) {
 514                                         pwd->pw_change = 0;
 515                                         edited = 1;
 516                                 }
 517                         }
 518                         else {
 519                                 time_t          now = time(NULL);
 520                                 time_t          expire = parse_date(now, arg->val);
 521
 522                                 if (pwd->pw_change != expire) {
 523                                         pwd->pw_change = expire;
 524                                         edited = 1;
 525                                 }
 526                         }
 527                 }
 528
 529                 if ((arg = getarg(args, 'e')) != NULL) {
 530                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 531                                 if (pwd->pw_expire != 0) {
 532                                         pwd->pw_expire = 0;
 533                                         edited = 1;
 534                                 }
 535                         }
 536                         else {
 537                                 time_t          now = time(NULL);
 538                                 time_t          expire = parse_date(now, arg->val);
 539
 540                                 if (pwd->pw_expire != expire) {
 541                                         pwd->pw_expire = expire;
 542                                         edited = 1;
 543                                 }
 544                         }
 545                 }
 546
 547                 if ((arg = getarg(args, 's')) != NULL) {
 548                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 549                         if (shell == NULL)
 550                                 shell = "";
 551                         if (strcmp(shell, pwd->pw_shell) != 0) {
 552                                 pwd->pw_shell = shell;
 553                                 edited = 1;
 554                         }
 555                 }
 556
 557                 if (getarg(args, 'L')) {
 558                         if (cnf->default_class == NULL)
 559                                 cnf->default_class = "";
 560                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 561                                 pwd->pw_class = cnf->default_class;
 562                                 edited = 1;
 563                         }
 564                 }
 565
 566                 if ((arg  = getarg(args, 'd')) != NULL) {
 567                         if (strcmp(pwd->pw_dir, arg->val))
 568                                 edited = 1;
 569                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 570                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 571                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 572                         } else if (!S_ISDIR(st.st_mode))
 573                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 574                 }
 575
 576                 if ((arg = getarg(args, 'w')) != NULL &&
 577                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 578                         login_cap_t *lc;
 579
 580                         lc = login_getpwclass(pwd);
 581                         if (lc == NULL ||
 582                             login_setcryptfmt(lc, "sha512", NULL) == NULL)
 583                                 warn("setting crypt(3) format");
 584                         login_close(lc);
 585                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 586                         edited = 1;
 587                 }
 588
 589         } else {
 590                 login_cap_t *lc;
 591
 592                 /*
 593                  * Add code
 594                  */
 595
 596                 if (a_name == NULL)     /* Required */
 597                         errx(EX_DATAERR, "login name required");
 598                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 599                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 600
 601                 /*
 602                  * Now, set up defaults for a new user
 603                  */
 604                 pwd = &fakeuser;
 605                 pwd->pw_name = a_name->val;
 606                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 607                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 608                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 609                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 610                 pwd->pw_expire = pw_exppolicy(cnf, args);
 611                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 612                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 613                 lc = login_getpwclass(pwd);
 614                 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
 615                         warn("setting crypt(3) format");
 616                 login_close(lc);
 617                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 618                 edited = 1;
 619
 620                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 621                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 622         }
 623
 624         /*
 625          * Shared add/edit code
 626          */
 627         if ((arg = getarg(args, 'c')) != NULL) {
 628                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 629                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 630                         pwd->pw_gecos = gecos;
 631                         edited = 1;
 632                 }
 633         }
 634
 635         if ((arg = getarg(args, 'h')) != NULL ||
 636             (arg = getarg(args, 'H')) != NULL) {
 637                 if (strcmp(arg->val, "-") == 0) {
 638                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 639                                 pwd->pw_passwd = "*";   /* No access */
 640                                 edited = 1;
 641                         }
 642                 } else {
 643                         int             fd = atoi(arg->val);
 644                         int             precrypt = (arg->ch == 'H');
 645                         int             b;
 646                         int             istty = isatty(fd);
 647                         struct termios  t;
 648                         login_cap_t     *lc;
 649
 650                         if (istty) {
 651                                 if (tcgetattr(fd, &t) == -1)
 652                                         istty = 0;
 653                                 else {
 654                                         struct termios  n = t;
 655
 656                                         /* Disable echo */
 657                                         n.c_lflag &= ~(ECHO);
 658                                         tcsetattr(fd, TCSANOW, &n);
 659                                         printf("%s%spassword for user %s:",
 660                                              (mode == M_UPDATE) ? "new " : "",
 661                                              precrypt ? "encrypted " : "",
 662                                              pwd->pw_name);
 663                                         fflush(stdout);
 664                                 }
 665                         }
 666                         b = read(fd, line, sizeof(line) - 1);
 667                         if (istty) {    /* Restore state */
 668                                 tcsetattr(fd, TCSANOW, &t);
 669                                 fputc('\n', stdout);
 670                                 fflush(stdout);
 671                         }
 672                         if (b < 0)
 673                                 err(EX_IOERR, "-%c file descriptor",
 674                                     precrypt ? 'H' : 'h');
 675                         line[b] = '\0';
 676                         if ((p = strpbrk(line, "\r\n")) != NULL)
 677                                 *p = '\0';
 678                         if (!*line)
 679                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 680                         if (precrypt) {
 681                                 if (strchr(line, ':') != NULL)
 682                                         return EX_DATAERR;
 683                                 pwd->pw_passwd = line;
 684                         } else {
 685                                 lc = login_getpwclass(pwd);
 686                                 if (lc == NULL ||
 687                                     login_setcryptfmt(lc, "sha512", NULL) == NULL)
 688                                         warn("setting crypt(3) format");
 689                                 login_close(lc);
 690                                 pwd->pw_passwd = pw_pwcrypt(line);
 691                         }
 692                         edited = 1;
 693                 }
 694         }
 695
 696         /*
 697          * Special case: -N only displays & exits
 698          */
 699         if (getarg(args, 'N') != NULL)
 700                 return print_user(pwd,
 701                                   getarg(args, 'P') != NULL,
 702                                   getarg(args, '7') != NULL);
 703
 704         if (mode == M_ADD) {
 705                 edited = 1;     /* Always */
 706                 rc = addpwent(pwd);
 707                 if (rc == -1)
 708                         errx(EX_IOERR, "user '%s' already exists",
 709                             pwd->pw_name);
 710                 else if (rc != 0)
 711                         err(EX_IOERR, "passwd file update");
 712                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 713                         rc = addnispwent(cnf->nispasswd, pwd);
 714                         if (rc == -1)
 715                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 716                         else
 717                                 warn("NIS passwd update");
 718                         /* NOTE: we treat NIS-only update errors as non-fatal */
 719                 }
 720         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 721                 if (edited) {   /* Only updated this if required */
 722                         rc = chgpwent(a_name->val, pwd);
 723                         if (rc == -1)
 724                                 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name);
 725                         else if (rc != 0)
 726                                 err(EX_IOERR, "passwd file update");
 727                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 728                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 729                                 if (rc == -1)
 730                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 731                                 else
 732                                         warn("NIS passwd update");
 733                                 /* NOTE: NIS-only update errors are not fatal */
 734                         }
 735                 }
 736         }
 737
 738         /*
 739          * Ok, user is created or changed - now edit group file
 740          */
 741
 742         if (mode == M_ADD || getarg(args, 'G') != NULL) {
 743                 int i, j;
 744                 /* First remove the user from all group */
 745                 SETGRENT();
 746                 while ((grp = GETGRENT()) != NULL) {
 747                         char group[MAXLOGNAME];
 748                         if (grp->gr_mem == NULL)
 749                                 continue;
 750                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
 751                                 if (strcmp(grp->gr_mem[i] , pwd->pw_name) != 0)
 752                                         continue;
 753                                 for (j = i; grp->gr_mem[j] != NULL ; j++)
 754                                         grp->gr_mem[j] = grp->gr_mem[j+1];
 755                                 strlcpy(group, grp->gr_name, MAXLOGNAME);
 756                                 chggrent(group, grp);
 757                         }
 758                 }
 759                 ENDGRENT();
 760
 761                 /* now add to group where needed */
 762                 for (i = 0; cnf->groups[i] != NULL; i++) {
 763                         grp = GETGRNAM(cnf->groups[i]);
 764                         grp = gr_add(grp, pwd->pw_name);
 765                         /*
 766                          * grp can only be NULL in 2 cases:
 767                          * - the new member is already a member
 768                          * - a problem with memory occurs
 769                          * in both cases we want to skip now.
 770                          */
 771                         if (grp == NULL)
 772                                 continue;
 773                         chggrent(cnf->groups[i], grp);
 774                         free(grp);
 775                 }
 776         }
 777
 778
 779         /* go get a current version of pwd */
 780         pwd = GETPWNAM(a_name->val);
 781         if (pwd == NULL) {
 782                 /* This will fail when we rename, so special case that */
 783                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 784                         a_name->val = arg->val;         /* update new name */
 785                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 786                 }
 787         }
 788         if (pwd == NULL)        /* can't go on without this */
 789                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 790
 791         grp = GETGRGID(pwd->pw_gid);
 792         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 793                pwd->pw_name, (long) pwd->pw_uid,
 794             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 795                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 796
 797         /*
 798          * If adding, let's touch and chown the user's mail file. This is not
 799          * strictly necessary under BSD with a 0755 maildir but it also
 800          * doesn't hurt anything to create the empty mailfile
 801          */
 802         if (mode == M_ADD) {
 803                 if (!PWALTDIR()) {
 804                         snprintf(line, sizeof(line), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 805                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 806                                                                          * mtime */
 807                         chown(line, pwd->pw_uid, pwd->pw_gid);
 808                 }
 809         }
 810
 811         /*
 812          * Let's create and populate the user's home directory. Note
 813          * that this also `works' for editing users if -m is used, but
 814          * existing files will *not* be overwritten.
 815          */
 816         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 817                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 818                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 819                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 820         }
 821
 822
 823         /*
 824          * Finally, send mail to the new user as well, if we are asked to
 825          */
 826         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 827                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 828
 829                 if (pfp == NULL)
 830                         warn("sendmail");
 831                 else {
 832                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 833                         while (fgets(line, sizeof(line), fp) != NULL) {
 834                                 /* Do substitutions? */
 835                                 fputs(line, pfp);
 836                         }
 837                         pclose(pfp);
 838                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 839                             pwd->pw_name, (long) pwd->pw_uid);
 840                 }
 841                 fclose(fp);
 842         }
 843
 844         return EXIT_SUCCESS;
 845 }
 846
 847
 848 static          uid_t
 849 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 850 {
 851         struct passwd  *pwd;
 852         uid_t           uid = (uid_t) - 1;
 853         struct carg    *a_uid = getarg(args, 'u');
 854
 855         /*
 856          * Check the given uid, if any
 857          */
 858         if (a_uid != NULL) {
 859                 uid = (uid_t) atol(a_uid->val);
 860
 861                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 862                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 863         } else {
 864                 struct bitmap   bm;
 865
 866                 /*
 867                  * We need to allocate the next available uid under one of
 868                  * two policies a) Grab the first unused uid b) Grab the
 869                  * highest possible unused uid
 870                  */
 871                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 872                                                          * claus^H^H^H^Hheck */
 873                         cnf->min_uid = 1000;
 874                         cnf->max_uid = 32000;
 875                 }
 876                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 877
 878                 /*
 879                  * Now, let's fill the bitmap from the password file
 880                  */
 881                 SETPWENT();
 882                 while ((pwd = GETPWENT()) != NULL)
 883                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 884                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 885                 ENDPWENT();
 886
 887                 /*
 888                  * Then apply the policy, with fallback to reuse if necessary
 889                  */
 890                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 891                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 892
 893                 /*
 894                  * Another sanity check
 895                  */
 896                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 897                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 898                 bm_dealloc(&bm);
 899         }
 900         return uid;
 901 }
 902
 903
 904 static          uid_t
 905 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 906 {
 907         struct group   *grp;
 908         gid_t           gid = (uid_t) - 1;
 909         struct carg    *a_gid = getarg(args, 'g');
 910
 911         /*
 912          * If no arg given, see if default can help out
 913          */
 914         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 915                 a_gid = addarg(args, 'g', cnf->default_group);
 916
 917         /*
 918          * Check the given gid, if any
 919          */
 920         SETGRENT();
 921         if (a_gid != NULL) {
 922                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 923                         gid = (gid_t) atol(a_gid->val);
 924                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 925                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 926                 }
 927                 gid = grp->gr_gid;
 928         } else if ((grp = GETGRNAM(nam)) != NULL &&
 929             (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) {
 930                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 931         } else {
 932                 struct cargs    grpargs;
 933                 char            tmp[32];
 934
 935                 LIST_INIT(&grpargs);
 936                 addarg(&grpargs, 'n', nam);
 937
 938                 /*
 939                  * We need to auto-create a group with the user's name. We
 940                  * can send all the appropriate output to our sister routine
 941                  * bit first see if we can create a group with gid==uid so we
 942                  * can keep the user and group ids in sync. We purposely do
 943                  * NOT check the gid range if we can force the sync. If the
 944                  * user's name dups an existing group, then the group add
 945                  * function will happily handle that case for us and exit.
 946                  */
 947                 if (GETGRGID(prefer) == NULL) {
 948                         snprintf(tmp, sizeof(tmp), "%u", prefer);
 949                         addarg(&grpargs, 'g', tmp);
 950                 }
 951                 if (getarg(args, 'N'))
 952                 {
 953                         addarg(&grpargs, 'N', NULL);
 954                         addarg(&grpargs, 'q', NULL);
 955                         gid = pw_group(cnf, M_NEXT, &grpargs);
 956                 }
 957                 else
 958                 {
 959                         pw_group(cnf, M_ADD, &grpargs);
 960                         if ((grp = GETGRNAM(nam)) != NULL)
 961                                 gid = grp->gr_gid;
 962                 }
 963                 a_gid = LIST_FIRST(&grpargs);
 964                 while (a_gid != NULL) {
 965                         struct carg    *t = LIST_NEXT(a_gid, list);
 966                         LIST_REMOVE(a_gid, list);
 967                         a_gid = t;
 968                 }
 969         }
 970         ENDGRENT();
 971         return gid;
 972 }
 973
 974
 975 static          time_t
 976 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 977 {
 978         time_t          result = 0;
 979         time_t          now = time(NULL);
 980         struct carg    *arg = getarg(args, 'p');
 981
 982         if (arg != NULL) {
 983                 if ((result = parse_date(now, arg->val)) == now)
 984                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 985         } else if (cnf->password_days > 0)
 986                 result = now + ((long) cnf->password_days * 86400L);
 987         return result;
 988 }
 989
 990
 991 static          time_t
 992 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 993 {
 994         time_t          result = 0;
 995         time_t          now = time(NULL);
 996         struct carg    *arg = getarg(args, 'e');
 997
 998         if (arg != NULL) {
 999                 if ((result = parse_date(now, arg->val)) == now)
1000                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
1001         } else if (cnf->expire_days > 0)
1002                 result = now + ((long) cnf->expire_days * 86400L);
1003         return result;
1004 }
1005
1006
1007 static char    *
1008 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
1009 {
1010         struct carg    *arg = getarg(args, 'd');
1011         static char     home[128];
1012
1013         if (arg)
1014                 return (arg->val);
1015
1016         if (cnf->home == NULL || *cnf->home == '\0')
1017                 errx(EX_CONFIG, "no base home directory set");
1018         snprintf(home, sizeof(home), "%s/%s", cnf->home, user);
1019
1020         return (home);
1021 }
1022
1023 static char    *
1024 shell_path(char const * path, char *shells[], char *sh)
1025 {
1026         if (sh != NULL && (*sh == '/' || *sh == '\0'))
1027                 return sh;      /* specified full path or forced none */
1028         else {
1029                 char           *p;
1030                 char            paths[_UC_MAXLINE];
1031
1032                 /*
1033                  * We need to search paths
1034                  */
1035                 strlcpy(paths, path, sizeof(paths));
1036                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
1037                         int             i;
1038                         static char     shellpath[256];
1039
1040                         if (sh != NULL) {
1041                                 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
1042                                 if (access(shellpath, X_OK) == 0)
1043                                         return shellpath;
1044                         } else
1045                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
1046                                         snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]);
1047                                         if (access(shellpath, X_OK) == 0)
1048                                                 return shellpath;
1049                                 }
1050                 }
1051                 if (sh == NULL)
1052                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1053                 errx(EX_CONFIG, "no default shell available or defined");
1054                 return NULL;
1055         }
1056 }
1057
1058
1059 static char    *
1060 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1061 {
1062         char           *sh = newshell;
1063         struct carg    *arg = getarg(args, 's');
1064
1065         if (newshell == NULL && arg != NULL)
1066                 sh = arg->val;
1067         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1068 }
1069
1070 #define SALTSIZE        32
1071
1072 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1073
1074 char           *
1075 pw_pwcrypt(char *password)
1076 {
1077         int             i;
1078         char            salt[SALTSIZE + 1];
1079         char            *cryptpw;
1080
1081         static char     buf[256];
1082
1083         /*
1084          * Calculate a salt value
1085          */
1086         for (i = 0; i < SALTSIZE; i++)
1087                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1088         salt[SALTSIZE] = '\0';
1089
1090         cryptpw = crypt(password, salt);
1091         if (cryptpw == NULL)
1092                 errx(EX_CONFIG, "crypt(3) failure");
1093         return strcpy(buf, cryptpw);
1094 }
1095
1096
1097 static char    *
1098 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1099 {
1100         int             i, l;
1101         char            pwbuf[32];
1102
1103         switch (cnf->default_password) {
1104         case -1:                /* Random password */
1105                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1106                 for (i = 0; i < l; i++)
1107                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1108                 pwbuf[i] = '\0';
1109
1110                 /*
1111                  * We give this information back to the user
1112                  */
1113                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1114                     getarg(args, 'N') == NULL) {
1115                         if (isatty(STDOUT_FILENO))
1116                                 printf("Password for '%s' is: ", user);
1117                         printf("%s\n", pwbuf);
1118                         fflush(stdout);
1119                 }
1120                 break;
1121
1122         case -2:                /* No password at all! */
1123                 return "";
1124
1125         case 0:         /* No login - default */
1126         default:
1127                 return "*";
1128
1129         case 1:         /* user's name */
1130                 strlcpy(pwbuf, user, sizeof(pwbuf));
1131                 break;
1132         }
1133         return pw_pwcrypt(pwbuf);
1134 }
1135
1136
1137 static int
1138 print_user(struct passwd * pwd, int pretty, int v7)
1139 {
1140         if (!pretty) {
1141                 char            *buf;
1142
1143                 if (!v7)
1144                         pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*";
1145
1146                 buf = v7 ? pw_make_v7(pwd) : pw_make(pwd);
1147                 printf("%s\n", buf);
1148                 free(buf);
1149         } else {
1150                 int             j;
1151                 char           *p;
1152                 struct group   *grp = GETGRGID(pwd->pw_gid);
1153                 char            uname[60] = "User &", office[60] = "[None]",
1154                                 wphone[60] = "[None]", hphone[60] = "[None]";
1155                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1156                 struct tm *    tptr;
1157
1158                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1159                         strlcpy(uname, p, sizeof(uname));
1160                         if ((p = strtok(NULL, ",")) != NULL) {
1161                                 strlcpy(office, p, sizeof(office));
1162                                 if ((p = strtok(NULL, ",")) != NULL) {
1163                                         strlcpy(wphone, p, sizeof(wphone));
1164                                         if ((p = strtok(NULL, "")) != NULL) {
1165                                                 strlcpy(hphone, p,
1166                                                     sizeof(hphone));
1167                                         }
1168                                 }
1169                         }
1170                 }
1171                 /*
1172                  * Handle '&' in gecos field
1173                  */
1174                 if ((p = strchr(uname, '&')) != NULL) {
1175                         int             l = strlen(pwd->pw_name);
1176                         int             m = strlen(p);
1177
1178                         memmove(p + l, p + 1, m);
1179                         memmove(p, pwd->pw_name, l);
1180                         *p = (char) toupper((unsigned char)*p);
1181                 }
1182                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1183                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1184                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1185                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1186                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1187                        " Full Name: %s\n"
1188                        "      Home: %-26.26s      Class: %s\n"
1189                        "     Shell: %-26.26s     Office: %s\n"
1190                        "Work Phone: %-26.26s Home Phone: %s\n"
1191                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1192                        pwd->pw_name, (long) pwd->pw_uid,
1193                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1194                        uname, pwd->pw_dir, pwd->pw_class,
1195                        pwd->pw_shell, office, wphone, hphone,
1196                        acexpire, pwexpire);
1197                 SETGRENT();
1198                 j = 0;
1199                 while ((grp=GETGRENT()) != NULL)
1200                 {
1201                         int     i = 0;
1202                         if (grp->gr_mem != NULL) {
1203                                 while (grp->gr_mem[i] != NULL)
1204                                 {
1205                                         if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1206                                         {
1207                                                 printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1208                                                 break;
1209                                         }
1210                                         ++i;
1211                                 }
1212                         }
1213                 }
1214                 ENDGRENT();
1215                 printf("%s", j ? "\n" : "");
1216         }
1217         return EXIT_SUCCESS;
1218 }
1219
1220 char    *
1221 pw_checkname(u_char *name, int gecos)
1222 {
1223         char showch[8];
1224         u_char const *badchars, *ch, *showtype;
1225         int reject;
1226
1227         ch = name;
1228         reject = 0;
1229         if (gecos) {
1230                 /* See if the name is valid as a gecos (comment) field. */
1231                 badchars = ":!@";
1232                 showtype = "gecos field";
1233         } else {
1234                 /* See if the name is valid as a userid or group. */
1235                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1236                 showtype = "userid/group name";
1237                 /* Userids and groups can not have a leading '-'. */
1238                 if (*ch == '-')
1239                         reject = 1;
1240         }
1241         if (!reject) {
1242                 while (*ch) {
1243                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1244                             *ch == 127) {
1245                                 reject = 1;
1246                                 break;
1247                         }
1248                         /* 8-bit characters are only allowed in GECOS fields */
1249                         if (!gecos && (*ch & 0x80)) {
1250                                 reject = 1;
1251                                 break;
1252                         }
1253                         ch++;
1254                 }
1255         }
1256         /*
1257          * A `$' is allowed as the final character for userids and groups,
1258          * mainly for the benefit of samba.
1259          */
1260         if (reject && !gecos) {
1261                 if (*ch == '$' && *(ch + 1) == '\0') {
1262                         reject = 0;
1263                         ch++;
1264                 }
1265         }
1266         if (reject) {
1267                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1268                     ? "`%c'" : "0x%02x", *ch);
1269                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
1270                     showch, (ch - name), showtype);
1271         }
1272         if (!gecos && (ch - name) > LOGNAMESIZE)
1273                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1274                     LOGNAMESIZE);
1275         return (char *)name;
1276 }
1277
1278
1279 static void
1280 rmat(uid_t uid)
1281 {
1282         DIR            *d = opendir("/var/at/jobs");
1283
1284         if (d != NULL) {
1285                 struct dirent  *e;
1286
1287                 while ((e = readdir(d)) != NULL) {
1288                         struct stat     st;
1289
1290                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1291                             stat(e->d_name, &st) == 0 &&
1292                             !S_ISDIR(st.st_mode) &&
1293                             st.st_uid == uid) {
1294                                 char            tmp[MAXPATHLEN];
1295
1296                                 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s", e->d_name);
1297                                 system(tmp);
1298                         }
1299                 }
1300                 closedir(d);
1301         }
1302 }
1303
1304 static void
1305 rmopie(char const * name)
1306 {
1307         static const char etcopie[] = "/etc/opiekeys";
1308         FILE   *fp = fopen(etcopie, "r+");
1309
1310         if (fp != NULL) {
1311                 char    tmp[1024];
1312                 off_t   atofs = 0;
1313                 int     length = strlen(name);
1314
1315                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1316                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1317                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1318                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1319                                 }
1320                                 break;
1321                         }
1322                         atofs = ftell(fp);
1323                 }
1324                 /*
1325                  * If we got an error of any sort, don't update!
1326                  */
1327                 fclose(fp);
1328         }
1329 }
1330