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         }
 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                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 365                         if (passtmp == NULL)    /* disaster */
 366                                 errx(EX_UNAVAILABLE, "out of memory");
 367                         strcpy(passtmp, locked_str);
 368                         strcat(passtmp, pwd->pw_passwd);
 369                         pwd->pw_passwd = passtmp;
 370                         edited = 1;
 371                 } else if (mode == M_UNLOCK) {
 372                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 373                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 374                         pwd->pw_passwd += sizeof(locked_str)-1;
 375                         edited = 1;
 376                 } else if (mode == M_DELETE) {
 377                         /*
 378                          * Handle deletions now
 379                          */
 380                         char            file[MAXPATHLEN];
 381                         char            home[MAXPATHLEN];
 382                         uid_t           uid = pwd->pw_uid;
 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                                         sprintf(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                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 408                         strlcpy(home, pwd->pw_dir, sizeof(home));
 409
 410                         rc = delpwent(pwd);
 411                         if (rc == -1)
 412                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 413                         else if (rc != 0) {
 414                                 warn("passwd update");
 415                                 return EX_IOERR;
 416                         }
 417
 418                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 419                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 420                                 if (rc == -1)
 421                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 422                                 else if (rc != 0)
 423                                         warn("WARNING: NIS passwd update");
 424                                 /* non-fatal */
 425                         }
 426
 427                         grp = GETGRNAM(a_name->val);
 428                         if (grp != NULL && *grp->gr_mem == NULL)
 429                                 delgrent(GETGRNAM(a_name->val));
 430                         SETGRENT();
 431                         while ((grp = GETGRENT()) != NULL) {
 432                                 int i;
 433                                 char group[MAXLOGNAME];
 434                                 for (i = 0; grp->gr_mem[i] != NULL; i++) {
 435                                         if (!strcmp(grp->gr_mem[i], a_name->val)) {
 436                                                 while (grp->gr_mem[i] != NULL) {
 437                                                         grp->gr_mem[i] = grp->gr_mem[i+1];
 438                                                 }
 439                                                 strlcpy(group, grp->gr_name, MAXLOGNAME);
 440                                                 chggrent(group, grp);
 441                                         }
 442                                 }
 443                         }
 444                         ENDGRENT();
 445
 446                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 447
 448                         if (!PWALTDIR()) {
 449                                 /*
 450                                  * Remove mail file
 451                                  */
 452                                 remove(file);
 453
 454                                 /*
 455                                  * Remove at jobs
 456                                  */
 457                                 if (getpwuid(uid) == NULL)
 458                                         rmat(uid);
 459
 460                                 /*
 461                                  * Remove home directory and contents
 462                                  */
 463                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 464                                         if (stat(home, &st) != -1) {
 465                                                 rm_r(home, uid);
 466                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 467                                                        a_name->val, (long) uid, home,
 468                                                        stat(home, &st) == -1 ? "" : "not completely ");
 469                                         }
 470                                 }
 471                         }
 472                         return EXIT_SUCCESS;
 473                 } else if (mode == M_PRINT)
 474                         return print_user(pwd,
 475                                           getarg(args, 'P') != NULL,
 476                                           getarg(args, '7') != NULL);
 477
 478                 /*
 479                  * The rest is edit code
 480                  */
 481                 if ((arg = getarg(args, 'l')) != NULL) {
 482                         if (strcmp(pwd->pw_name, "root") == 0)
 483                                 errx(EX_DATAERR, "can't rename `root' account");
 484                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 485                         edited = 1;
 486                 }
 487
 488                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 489                         pwd->pw_uid = (uid_t) atol(arg->val);
 490                         edited = 1;
 491                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 492                                 errx(EX_DATAERR, "can't change uid of `root' account");
 493                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 494                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 495                 }
 496
 497                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 498                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 499                         if (newgid != pwd->pw_gid) {
 500                                 edited = 1;
 501                                 pwd->pw_gid = newgid;
 502                         }
 503                 }
 504
 505                 if ((arg = getarg(args, 'p')) != NULL) {
 506                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 507                                 if (pwd->pw_change != 0) {
 508                                         pwd->pw_change = 0;
 509                                         edited = 1;
 510                                 }
 511                         }
 512                         else {
 513                                 time_t          now = time(NULL);
 514                                 time_t          expire = parse_date(now, arg->val);
 515
 516                                 if (pwd->pw_change != expire) {
 517                                         pwd->pw_change = expire;
 518                                         edited = 1;
 519                                 }
 520                         }
 521                 }
 522
 523                 if ((arg = getarg(args, 'e')) != NULL) {
 524                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 525                                 if (pwd->pw_expire != 0) {
 526                                         pwd->pw_expire = 0;
 527                                         edited = 1;
 528                                 }
 529                         }
 530                         else {
 531                                 time_t          now = time(NULL);
 532                                 time_t          expire = parse_date(now, arg->val);
 533
 534                                 if (pwd->pw_expire != expire) {
 535                                         pwd->pw_expire = expire;
 536                                         edited = 1;
 537                                 }
 538                         }
 539                 }
 540
 541                 if ((arg = getarg(args, 's')) != NULL) {
 542                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 543                         if (shell == NULL)
 544                                 shell = "";
 545                         if (strcmp(shell, pwd->pw_shell) != 0) {
 546                                 pwd->pw_shell = shell;
 547                                 edited = 1;
 548                         }
 549                 }
 550
 551                 if (getarg(args, 'L')) {
 552                         if (cnf->default_class == NULL)
 553                                 cnf->default_class = "";
 554                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 555                                 pwd->pw_class = cnf->default_class;
 556                                 edited = 1;
 557                         }
 558                 }
 559
 560                 if ((arg  = getarg(args, 'd')) != NULL) {
 561                         if (strcmp(pwd->pw_dir, arg->val))
 562                                 edited = 1;
 563                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 564                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 565                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 566                         } else if (!S_ISDIR(st.st_mode))
 567                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 568                 }
 569
 570                 if ((arg = getarg(args, 'w')) != NULL &&
 571                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 572                         login_cap_t *lc;
 573
 574                         lc = login_getpwclass(pwd);
 575                         if (lc == NULL ||
 576                             login_setcryptfmt(lc, "sha512", NULL) == NULL)
 577                                 warn("setting crypt(3) format");
 578                         login_close(lc);
 579                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 580                         edited = 1;
 581                 }
 582
 583         } else {
 584                 login_cap_t *lc;
 585
 586                 /*
 587                  * Add code
 588                  */
 589
 590                 if (a_name == NULL)     /* Required */
 591                         errx(EX_DATAERR, "login name required");
 592                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 593                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 594
 595                 /*
 596                  * Now, set up defaults for a new user
 597                  */
 598                 pwd = &fakeuser;
 599                 pwd->pw_name = a_name->val;
 600                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 601                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 602                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 603                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 604                 pwd->pw_expire = pw_exppolicy(cnf, args);
 605                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 606                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 607                 lc = login_getpwclass(pwd);
 608                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 609                         warn("setting crypt(3) format");
 610                 login_close(lc);
 611                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 612                 edited = 1;
 613
 614                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 615                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 616         }
 617
 618         /*
 619          * Shared add/edit code
 620          */
 621         if ((arg = getarg(args, 'c')) != NULL) {
 622                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 623                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 624                         pwd->pw_gecos = gecos;
 625                         edited = 1;
 626                 }
 627         }
 628
 629         if ((arg = getarg(args, 'h')) != NULL ||
 630             (arg = getarg(args, 'H')) != NULL) {
 631                 if (strcmp(arg->val, "-") == 0) {
 632                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 633                                 pwd->pw_passwd = "*";   /* No access */
 634                                 edited = 1;
 635                         }
 636                 } else {
 637                         int             fd = atoi(arg->val);
 638                         int             precrypt = (arg->ch == 'H');
 639                         int             b;
 640                         int             istty = isatty(fd);
 641                         struct termios  t;
 642                         login_cap_t     *lc;
 643
 644                         if (istty) {
 645                                 if (tcgetattr(fd, &t) == -1)
 646                                         istty = 0;
 647                                 else {
 648                                         struct termios  n = t;
 649
 650                                         /* Disable echo */
 651                                         n.c_lflag &= ~(ECHO);
 652                                         tcsetattr(fd, TCSANOW, &n);
 653                                         printf("%s%spassword for user %s:",
 654                                              (mode == M_UPDATE) ? "new " : "",
 655                                              precrypt ? "encrypted " : "",
 656                                              pwd->pw_name);
 657                                         fflush(stdout);
 658                                 }
 659                         }
 660                         b = read(fd, line, sizeof(line) - 1);
 661                         if (istty) {    /* Restore state */
 662                                 tcsetattr(fd, TCSANOW, &t);
 663                                 fputc('\n', stdout);
 664                                 fflush(stdout);
 665                         }
 666                         if (b < 0) {
 667                                 warn("-%c file descriptor", precrypt ? 'H' :
 668                                     'h');
 669                                 return EX_IOERR;
 670                         }
 671                         line[b] = '\0';
 672                         if ((p = strpbrk(line, "\r\n")) != NULL)
 673                                 *p = '\0';
 674                         if (!*line)
 675                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 676                         if (precrypt) {
 677                                 if (strchr(line, ':') != NULL)
 678                                         return EX_DATAERR;
 679                                 pwd->pw_passwd = line;
 680                         } else {
 681                                 lc = login_getpwclass(pwd);
 682                                 if (lc == NULL ||
 683                                     login_setcryptfmt(lc, "md5", NULL) == NULL)
 684                                         warn("setting crypt(3) format");
 685                                 login_close(lc);
 686                                 pwd->pw_passwd = pw_pwcrypt(line);
 687                         }
 688                         edited = 1;
 689                 }
 690         }
 691
 692         /*
 693          * Special case: -N only displays & exits
 694          */
 695         if (getarg(args, 'N') != NULL)
 696                 return print_user(pwd,
 697                                   getarg(args, 'P') != NULL,
 698                                   getarg(args, '7') != NULL);
 699
 700         if (mode == M_ADD) {
 701                 edited = 1;     /* Always */
 702                 rc = addpwent(pwd);
 703                 if (rc == -1) {
 704                         warnx("user '%s' already exists", pwd->pw_name);
 705                         return EX_IOERR;
 706                 } else if (rc != 0) {
 707                         warn("passwd file update");
 708                         return EX_IOERR;
 709                 }
 710                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 711                         rc = addnispwent(cnf->nispasswd, pwd);
 712                         if (rc == -1)
 713                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 714                         else
 715                                 warn("NIS passwd update");
 716                         /* NOTE: we treat NIS-only update errors as non-fatal */
 717                 }
 718         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 719                 if (edited) {   /* Only updated this if required */
 720                         rc = chgpwent(a_name->val, pwd);
 721                         if (rc == -1) {
 722                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 723                                 return EX_IOERR;
 724                         } else if (rc != 0) {
 725                                 warn("passwd file update");
 726                                 return EX_IOERR;
 727                         }
 728                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 729                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 730                                 if (rc == -1)
 731                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 732                                 else
 733                                         warn("NIS passwd update");
 734                                 /* NOTE: NIS-only update errors are not fatal */
 735                         }
 736                 }
 737         }
 738
 739         /*
 740          * Ok, user is created or changed - now edit group file
 741          */
 742
 743         if (mode == M_ADD || getarg(args, 'G') != NULL) {
 744                 int i;
 745                 for (i = 0; cnf->groups[i] != NULL; i++) {
 746                         grp = GETGRNAM(cnf->groups[i]);
 747                         grp = gr_add(grp, pwd->pw_name);
 748                         /*
 749                          * grp can only be NULL in 2 cases:
 750                          * - the new member is already a member
 751                          * - a problem with memory occurs
 752                          * in both cases we want to skip now.
 753                          */
 754                         if (grp == NULL)
 755                                 continue;
 756                         chggrent(cnf->groups[i], grp);
 757                         free(grp);
 758                 }
 759         }
 760
 761
 762         /* go get a current version of pwd */
 763         pwd = GETPWNAM(a_name->val);
 764         if (pwd == NULL) {
 765                 /* This will fail when we rename, so special case that */
 766                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 767                         a_name->val = arg->val;         /* update new name */
 768                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 769                 }
 770         }
 771         if (pwd == NULL)        /* can't go on without this */
 772                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 773
 774         grp = GETGRGID(pwd->pw_gid);
 775         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 776                pwd->pw_name, (long) pwd->pw_uid,
 777             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 778                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 779
 780         /*
 781          * If adding, let's touch and chown the user's mail file. This is not
 782          * strictly necessary under BSD with a 0755 maildir but it also
 783          * doesn't hurt anything to create the empty mailfile
 784          */
 785         if (mode == M_ADD) {
 786                 if (!PWALTDIR()) {
 787                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 788                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 789                                                                          * mtime */
 790                         chown(line, pwd->pw_uid, pwd->pw_gid);
 791                 }
 792         }
 793
 794         /*
 795          * Let's create and populate the user's home directory. Note
 796          * that this also `works' for editing users if -m is used, but
 797          * existing files will *not* be overwritten.
 798          */
 799         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 800                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 801                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 802                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 803         }
 804
 805
 806         /*
 807          * Finally, send mail to the new user as well, if we are asked to
 808          */
 809         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 810                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 811
 812                 if (pfp == NULL)
 813                         warn("sendmail");
 814                 else {
 815                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 816                         while (fgets(line, sizeof(line), fp) != NULL) {
 817                                 /* Do substitutions? */
 818                                 fputs(line, pfp);
 819                         }
 820                         pclose(pfp);
 821                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 822                             pwd->pw_name, (long) pwd->pw_uid);
 823                 }
 824                 fclose(fp);
 825         }
 826
 827         return EXIT_SUCCESS;
 828 }
 829
 830
 831 static          uid_t
 832 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 833 {
 834         struct passwd  *pwd;
 835         uid_t           uid = (uid_t) - 1;
 836         struct carg    *a_uid = getarg(args, 'u');
 837
 838         /*
 839          * Check the given uid, if any
 840          */
 841         if (a_uid != NULL) {
 842                 uid = (uid_t) atol(a_uid->val);
 843
 844                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 845                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 846         } else {
 847                 struct bitmap   bm;
 848
 849                 /*
 850                  * We need to allocate the next available uid under one of
 851                  * two policies a) Grab the first unused uid b) Grab the
 852                  * highest possible unused uid
 853                  */
 854                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 855                                                          * claus^H^H^H^Hheck */
 856                         cnf->min_uid = 1000;
 857                         cnf->max_uid = 32000;
 858                 }
 859                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 860
 861                 /*
 862                  * Now, let's fill the bitmap from the password file
 863                  */
 864                 SETPWENT();
 865                 while ((pwd = GETPWENT()) != NULL)
 866                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 867                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 868                 ENDPWENT();
 869
 870                 /*
 871                  * Then apply the policy, with fallback to reuse if necessary
 872                  */
 873                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 874                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 875
 876                 /*
 877                  * Another sanity check
 878                  */
 879                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 880                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 881                 bm_dealloc(&bm);
 882         }
 883         return uid;
 884 }
 885
 886
 887 static          uid_t
 888 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 889 {
 890         struct group   *grp;
 891         gid_t           gid = (uid_t) - 1;
 892         struct carg    *a_gid = getarg(args, 'g');
 893
 894         /*
 895          * If no arg given, see if default can help out
 896          */
 897         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 898                 a_gid = addarg(args, 'g', cnf->default_group);
 899
 900         /*
 901          * Check the given gid, if any
 902          */
 903         SETGRENT();
 904         if (a_gid != NULL) {
 905                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 906                         gid = (gid_t) atol(a_gid->val);
 907                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 908                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 909                 }
 910                 gid = grp->gr_gid;
 911         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 912                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 913         } else {
 914                 struct cargs    grpargs;
 915                 char            tmp[32];
 916
 917                 LIST_INIT(&grpargs);
 918                 addarg(&grpargs, 'n', nam);
 919
 920                 /*
 921                  * We need to auto-create a group with the user's name. We
 922                  * can send all the appropriate output to our sister routine
 923                  * bit first see if we can create a group with gid==uid so we
 924                  * can keep the user and group ids in sync. We purposely do
 925                  * NOT check the gid range if we can force the sync. If the
 926                  * user's name dups an existing group, then the group add
 927                  * function will happily handle that case for us and exit.
 928                  */
 929                 if (GETGRGID(prefer) == NULL) {
 930                         sprintf(tmp, "%lu", (unsigned long) prefer);
 931                         addarg(&grpargs, 'g', tmp);
 932                 }
 933                 if (getarg(args, 'N'))
 934                 {
 935                         addarg(&grpargs, 'N', NULL);
 936                         addarg(&grpargs, 'q', NULL);
 937                         gid = pw_group(cnf, M_NEXT, &grpargs);
 938                 }
 939                 else
 940                 {
 941                         pw_group(cnf, M_ADD, &grpargs);
 942                         if ((grp = GETGRNAM(nam)) != NULL)
 943                                 gid = grp->gr_gid;
 944                 }
 945                 a_gid = LIST_FIRST(&grpargs);
 946                 while (a_gid != NULL) {
 947                         struct carg    *t = LIST_NEXT(a_gid, list);
 948                         LIST_REMOVE(a_gid, list);
 949                         a_gid = t;
 950                 }
 951         }
 952         ENDGRENT();
 953         return gid;
 954 }
 955
 956
 957 static          time_t
 958 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 959 {
 960         time_t          result = 0;
 961         time_t          now = time(NULL);
 962         struct carg    *arg = getarg(args, 'p');
 963
 964         if (arg != NULL) {
 965                 if ((result = parse_date(now, arg->val)) == now)
 966                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 967         } else if (cnf->password_days > 0)
 968                 result = now + ((long) cnf->password_days * 86400L);
 969         return result;
 970 }
 971
 972
 973 static          time_t
 974 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 975 {
 976         time_t          result = 0;
 977         time_t          now = time(NULL);
 978         struct carg    *arg = getarg(args, 'e');
 979
 980         if (arg != NULL) {
 981                 if ((result = parse_date(now, arg->val)) == now)
 982                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 983         } else if (cnf->expire_days > 0)
 984                 result = now + ((long) cnf->expire_days * 86400L);
 985         return result;
 986 }
 987
 988
 989 static char    *
 990 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 991 {
 992         struct carg    *arg = getarg(args, 'd');
 993
 994         if (arg)
 995                 return arg->val;
 996         else {
 997                 static char     home[128];
 998
 999                 if (cnf->home == NULL || *cnf->home == '\0')
1000                         errx(EX_CONFIG, "no base home directory set");
1001                 sprintf(home, "%s/%s", cnf->home, user);
1002                 return home;
1003         }
1004 }
1005
1006 static char    *
1007 shell_path(char const * path, char *shells[], char *sh)
1008 {
1009         if (sh != NULL && (*sh == '/' || *sh == '\0'))
1010                 return sh;      /* specified full path or forced none */
1011         else {
1012                 char           *p;
1013                 char            paths[_UC_MAXLINE];
1014
1015                 /*
1016                  * We need to search paths
1017                  */
1018                 strlcpy(paths, path, sizeof(paths));
1019                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
1020                         int             i;
1021                         static char     shellpath[256];
1022
1023                         if (sh != NULL) {
1024                                 sprintf(shellpath, "%s/%s", p, sh);
1025                                 if (access(shellpath, X_OK) == 0)
1026                                         return shellpath;
1027                         } else
1028                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
1029                                         sprintf(shellpath, "%s/%s", p, shells[i]);
1030                                         if (access(shellpath, X_OK) == 0)
1031                                                 return shellpath;
1032                                 }
1033                 }
1034                 if (sh == NULL)
1035                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1036                 errx(EX_CONFIG, "no default shell available or defined");
1037                 return NULL;
1038         }
1039 }
1040
1041
1042 static char    *
1043 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1044 {
1045         char           *sh = newshell;
1046         struct carg    *arg = getarg(args, 's');
1047
1048         if (newshell == NULL && arg != NULL)
1049                 sh = arg->val;
1050         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1051 }
1052
1053 #define SALTSIZE        32
1054
1055 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1056
1057 char           *
1058 pw_pwcrypt(char *password)
1059 {
1060         int             i;
1061         char            salt[SALTSIZE + 1];
1062         char            *cryptpw;
1063
1064         static char     buf[256];
1065
1066         /*
1067          * Calculate a salt value
1068          */
1069         for (i = 0; i < SALTSIZE; i++)
1070                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1071         salt[SALTSIZE] = '\0';
1072
1073         cryptpw = crypt(password, salt);
1074         if (cryptpw == NULL)
1075                 errx(EX_CONFIG, "crypt(3) failure");
1076         return strcpy(buf, cryptpw);
1077 }
1078
1079
1080 static char    *
1081 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1082 {
1083         int             i, l;
1084         char            pwbuf[32];
1085
1086         switch (cnf->default_password) {
1087         case -1:                /* Random password */
1088                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1089                 for (i = 0; i < l; i++)
1090                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1091                 pwbuf[i] = '\0';
1092
1093                 /*
1094                  * We give this information back to the user
1095                  */
1096                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1097                     getarg(args, 'N') == NULL) {
1098                         if (isatty(STDOUT_FILENO))
1099                                 printf("Password for '%s' is: ", user);
1100                         printf("%s\n", pwbuf);
1101                         fflush(stdout);
1102                 }
1103                 break;
1104
1105         case -2:                /* No password at all! */
1106                 return "";
1107
1108         case 0:         /* No login - default */
1109         default:
1110                 return "*";
1111
1112         case 1:         /* user's name */
1113                 strlcpy(pwbuf, user, sizeof(pwbuf));
1114                 break;
1115         }
1116         return pw_pwcrypt(pwbuf);
1117 }
1118
1119
1120 static int
1121 print_user(struct passwd * pwd, int pretty, int v7)
1122 {
1123         if (!pretty) {
1124                 char            *buf;
1125
1126                 if (!v7)
1127                         pwd->pw_passwd = (pwd->pw_passwd == NULL) ? "" : "*";
1128
1129                 buf = v7 ? pw_make_v7(pwd) : pw_make(pwd);
1130                 printf("%s\n", buf);
1131                 free(buf);
1132         } else {
1133                 int             j;
1134                 char           *p;
1135                 struct group   *grp = GETGRGID(pwd->pw_gid);
1136                 char            uname[60] = "User &", office[60] = "[None]",
1137                                 wphone[60] = "[None]", hphone[60] = "[None]";
1138                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1139                 struct tm *    tptr;
1140
1141                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1142                         strlcpy(uname, p, sizeof(uname));
1143                         if ((p = strtok(NULL, ",")) != NULL) {
1144                                 strlcpy(office, p, sizeof(office));
1145                                 if ((p = strtok(NULL, ",")) != NULL) {
1146                                         strlcpy(wphone, p, sizeof(wphone));
1147                                         if ((p = strtok(NULL, "")) != NULL) {
1148                                                 strlcpy(hphone, p,
1149                                                     sizeof(hphone));
1150                                         }
1151                                 }
1152                         }
1153                 }
1154                 /*
1155                  * Handle '&' in gecos field
1156                  */
1157                 if ((p = strchr(uname, '&')) != NULL) {
1158                         int             l = strlen(pwd->pw_name);
1159                         int             m = strlen(p);
1160
1161                         memmove(p + l, p + 1, m);
1162                         memmove(p, pwd->pw_name, l);
1163                         *p = (char) toupper((unsigned char)*p);
1164                 }
1165                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1166                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1167                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1168                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1169                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1170                        " Full Name: %s\n"
1171                        "      Home: %-26.26s      Class: %s\n"
1172                        "     Shell: %-26.26s     Office: %s\n"
1173                        "Work Phone: %-26.26s Home Phone: %s\n"
1174                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1175                        pwd->pw_name, (long) pwd->pw_uid,
1176                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1177                        uname, pwd->pw_dir, pwd->pw_class,
1178                        pwd->pw_shell, office, wphone, hphone,
1179                        acexpire, pwexpire);
1180                 SETGRENT();
1181                 j = 0;
1182                 while ((grp=GETGRENT()) != NULL)
1183                 {
1184                         int     i = 0;
1185                         while (grp->gr_mem[i] != NULL)
1186                         {
1187                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1188                                 {
1189                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1190                                         break;
1191                                 }
1192                                 ++i;
1193                         }
1194                 }
1195                 ENDGRENT();
1196                 printf("%s", j ? "\n" : "");
1197         }
1198         return EXIT_SUCCESS;
1199 }
1200
1201 char    *
1202 pw_checkname(u_char *name, int gecos)
1203 {
1204         char showch[8];
1205         u_char const *badchars, *ch, *showtype;
1206         int reject;
1207
1208         ch = name;
1209         reject = 0;
1210         if (gecos) {
1211                 /* See if the name is valid as a gecos (comment) field. */
1212                 badchars = ":!@";
1213                 showtype = "gecos field";
1214         } else {
1215                 /* See if the name is valid as a userid or group. */
1216                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1217                 showtype = "userid/group name";
1218                 /* Userids and groups can not have a leading '-'. */
1219                 if (*ch == '-')
1220                         reject = 1;
1221         }
1222         if (!reject) {
1223                 while (*ch) {
1224                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1225                             *ch == 127) {
1226                                 reject = 1;
1227                                 break;
1228                         }
1229                         /* 8-bit characters are only allowed in GECOS fields */
1230                         if (!gecos && (*ch & 0x80)) {
1231                                 reject = 1;
1232                                 break;
1233                         }
1234                         ch++;
1235                 }
1236         }
1237         /*
1238          * A `$' is allowed as the final character for userids and groups,
1239          * mainly for the benefit of samba.
1240          */
1241         if (reject && !gecos) {
1242                 if (*ch == '$' && *(ch + 1) == '\0') {
1243                         reject = 0;
1244                         ch++;
1245                 }
1246         }
1247         if (reject) {
1248                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1249                     ? "`%c'" : "0x%02x", *ch);
1250                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
1251                     showch, (ch - name), showtype);
1252         }
1253         if (!gecos && (ch - name) > LOGNAMESIZE)
1254                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1255                     LOGNAMESIZE);
1256         return (char *)name;
1257 }
1258
1259
1260 static void
1261 rmat(uid_t uid)
1262 {
1263         DIR            *d = opendir("/var/at/jobs");
1264
1265         if (d != NULL) {
1266                 struct dirent  *e;
1267
1268                 while ((e = readdir(d)) != NULL) {
1269                         struct stat     st;
1270
1271                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1272                             stat(e->d_name, &st) == 0 &&
1273                             !S_ISDIR(st.st_mode) &&
1274                             st.st_uid == uid) {
1275                                 char            tmp[MAXPATHLEN];
1276
1277                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1278                                 system(tmp);
1279                         }
1280                 }
1281                 closedir(d);
1282         }
1283 }
1284
1285 static void
1286 rmopie(char const * name)
1287 {
1288         static const char etcopie[] = "/etc/opiekeys";
1289         FILE   *fp = fopen(etcopie, "r+");
1290
1291         if (fp != NULL) {
1292                 char    tmp[1024];
1293                 off_t   atofs = 0;
1294                 int     length = strlen(name);
1295
1296                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1297                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1298                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1299                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1300                                 }
1301                                 break;
1302                         }
1303                         atofs = ftell(fp);
1304                 }
1305                 /*
1306                  * If we got an error of any sort, don't update!
1307                  */
1308                 fclose(fp);
1309         }
1310 }
1311