usr.sbin/pw/pw_user.c

   1 /*-
   2  * Copyright (C) 1996
   3  *      David L. Nugent.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27
  28 #ifndef lint
  29 static const char rcsid[] =
  30   "$FreeBSD$";
  31 #endif /* not lint */
  32
  33 #include <ctype.h>
  34 #include <err.h>
  35 #include <fcntl.h>
  36 #include <sys/param.h>
  37 #include <dirent.h>
  38 #include <paths.h>
  39 #include <termios.h>
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/resource.h>
  43 #include <unistd.h>
  44 #include <utmp.h>
  45 #include <login_cap.h>
  46 #include "pw.h"
  47 #include "bitmap.h"
  48
  49 #if (MAXLOGNAME-1) > UT_NAMESIZE
  50 #define LOGNAMESIZE UT_NAMESIZE
  51 #else
  52 #define LOGNAMESIZE (MAXLOGNAME-1)
  53 #endif
  54
  55 static          char locked_str[] = "*LOCKED*";
  56
  57 static int      print_user(struct passwd * pwd, int pretty, int v7);
  58 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  59 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  60 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  61 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  62 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  63 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  64 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  65 static char    *shell_path(char const * path, char *shells[], char *sh);
  66 static void     rmat(uid_t uid);
  67 static void     rmopie(char const * name);
  68
  69 /*-
  70  * -C config      configuration file
  71  * -q             quiet operation
  72  * -n name        login name
  73  * -u uid         user id
  74  * -c comment     user name/comment
  75  * -d directory   home directory
  76  * -e date        account expiry date
  77  * -p date        password expiry date
  78  * -g grp         primary group
  79  * -G grp1,grp2   additional groups
  80  * -m [ -k dir ]  create and set up home
  81  * -s shell       name of login shell
  82  * -o             duplicate uid ok
  83  * -L class       user class
  84  * -l name        new login name
  85  * -h fd          password filehandle
  86  * -H fd          encrypted password filehandle
  87  * -F             force print or add
  88  *   Setting defaults:
  89  * -D             set user defaults
  90  * -b dir         default home root dir
  91  * -e period      default expiry period
  92  * -p period      default password change period
  93  * -g group       default group
  94  * -G             grp1,grp2.. default additional groups
  95  * -L class       default login class
  96  * -k dir         default home skeleton
  97  * -s shell       default shell
  98  * -w method      default password method
  99  */
 100
 101 int
 102 pw_user(struct userconf * cnf, int mode, struct cargs * args)
 103 {
 104         int             rc, edited = 0;
 105         char           *p = NULL;
 106         char                                     *passtmp;
 107         struct carg    *a_name;
 108         struct carg    *a_uid;
 109         struct carg    *arg;
 110         struct passwd  *pwd = NULL;
 111         struct group   *grp;
 112         struct stat     st;
 113         char            line[_PASSWORD_LEN+1];
 114         FILE           *fp;
 115         mode_t dmode;
 116         char *dmode_c;
 117         void *set = NULL;
 118
 119         static struct passwd fakeuser =
 120         {
 121                 NULL,
 122                 "*",
 123                 -1,
 124                 -1,
 125                 0,
 126                 "",
 127                 "User &",
 128                 "/nonexistent",
 129                 "/bin/sh",
 130                 0
 131 #if defined(__FreeBSD__)
 132                 ,0
 133 #endif
 134         };
 135
 136
 137         /*
 138          * With M_NEXT, we only need to return the
 139          * next uid to stdout
 140          */
 141         if (mode == M_NEXT)
 142         {
 143                 uid_t next = pw_uidpolicy(cnf, args);
 144                 if (getarg(args, 'q'))
 145                         return next;
 146                 printf("%ld:", (long)next);
 147                 pw_group(cnf, mode, args);
 148                 return EXIT_SUCCESS;
 149         }
 150
 151         /*
 152          * We can do all of the common legwork here
 153          */
 154
 155         if ((arg = getarg(args, 'b')) != NULL) {
 156                 cnf->home = arg->val;
 157         }
 158
 159         if ((arg = getarg(args, 'M')) != NULL) {
 160                 dmode_c = arg->val;
 161                 if ((set = setmode(dmode_c)) == NULL)
 162                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 163                             dmode_c);
 164                 dmode = getmode(set, S_IRWXU | S_IRWXG | S_IRWXO);
 165                 free(set);
 166                 cnf->homemode = dmode;
 167         }
 168
 169         /*
 170          * If we'll need to use it or we're updating it,
 171          * then create the base home directory if necessary
 172          */
 173         if (arg != NULL || getarg(args, 'm') != NULL) {
 174                 int     l = strlen(cnf->home);
 175
 176                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 177                         cnf->home[--l] = '\0';
 178
 179                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 180                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 181
 182                 if (stat(cnf->home, &st) == -1) {
 183                         char    dbuf[MAXPATHLEN];
 184
 185                         /*
 186                          * This is a kludge especially for Joerg :)
 187                          * If the home directory would be created in the root partition, then
 188                          * we really create it under /usr which is likely to have more space.
 189                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 190                          */
 191                         if (strchr(cnf->home+1, '/') == NULL) {
 192                                 strcpy(dbuf, "/usr");
 193                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 194                                 if (mkdir(dbuf, cnf->homemode) != -1 || errno == EEXIST) {
 195                                         chown(dbuf, 0, 0);
 196                                         /*
 197                                          * Skip first "/" and create symlink:
 198                                          * /home -> usr/home
 199                                          */
 200                                         symlink(dbuf+1, cnf->home);
 201                                 }
 202                                 /* If this falls, fall back to old method */
 203                         }
 204                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 205                         p = dbuf;
 206                         if (stat(dbuf, &st) == -1) {
 207                                 while ((p = strchr(++p, '/')) != NULL) {
 208                                         *p = '\0';
 209                                         if (stat(dbuf, &st) == -1) {
 210                                                 if (mkdir(dbuf, cnf->homemode) == -1)
 211                                                         goto direrr;
 212                                                 chown(dbuf, 0, 0);
 213                                         } else if (!S_ISDIR(st.st_mode))
 214                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 215                                         *p = '/';
 216                                 }
 217                         }
 218                         if (stat(dbuf, &st) == -1) {
 219                                 if (mkdir(dbuf, cnf->homemode) == -1) {
 220                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 221                                 }
 222                                 chown(dbuf, 0, 0);
 223                         }
 224                 } else if (!S_ISDIR(st.st_mode))
 225                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 226         }
 227
 228         if ((arg = getarg(args, 'e')) != NULL)
 229                 cnf->expire_days = atoi(arg->val);
 230
 231         if ((arg = getarg(args, 'y')) != NULL)
 232                 cnf->nispasswd = arg->val;
 233
 234         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 235                 cnf->password_days = atoi(arg->val);
 236
 237         if ((arg = getarg(args, 'g')) != NULL) {
 238                 if (!*(p = arg->val))   /* Handle empty group list specially */
 239                         cnf->default_group = "";
 240                 else {
 241                         if ((grp = GETGRNAM(p)) == NULL) {
 242                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 243                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 244                         }
 245                         cnf->default_group = newstr(grp->gr_name);
 246                 }
 247         }
 248         if ((arg = getarg(args, 'L')) != NULL)
 249                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 250
 251         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 252                 int i = 0;
 253
 254                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 255                         if ((grp = GETGRNAM(p)) == NULL) {
 256                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 257                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 258                         }
 259                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 260                                 cnf->groups[i++] = newstr(grp->gr_name);
 261                 }
 262                 while (i < cnf->numgroups)
 263                         cnf->groups[i++] = NULL;
 264         }
 265
 266         if ((arg = getarg(args, 'k')) != NULL) {
 267                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 268                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 269         }
 270
 271         if ((arg = getarg(args, 's')) != NULL)
 272                 cnf->shell_default = arg->val;
 273
 274         if ((arg = getarg(args, 'w')) != NULL)
 275                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 276         if (mode == M_ADD && getarg(args, 'D')) {
 277                 if (getarg(args, 'n') != NULL)
 278                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 279                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 280                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 281                                 cnf->min_uid = 1000;
 282                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 283                                 cnf->max_uid = 32000;
 284                 }
 285                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 286                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 287                                 cnf->min_gid = 1000;
 288                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 289                                 cnf->max_gid = 32000;
 290                 }
 291
 292                 arg = getarg(args, 'C');
 293                 if (write_userconfig(arg ? arg->val : NULL))
 294                         return EXIT_SUCCESS;
 295                 warn("config update");
 296                 return EX_IOERR;
 297         }
 298
 299         if (mode == M_PRINT && getarg(args, 'a')) {
 300                 int             pretty = getarg(args, 'P') != NULL;
 301                 int             v7 = getarg(args, '7') != NULL;
 302
 303                 SETPWENT();
 304                 while ((pwd = GETPWENT()) != NULL)
 305                         print_user(pwd, pretty, v7);
 306                 ENDPWENT();
 307                 return EXIT_SUCCESS;
 308         }
 309
 310         if ((a_name = getarg(args, 'n')) != NULL)
 311                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 312         a_uid = getarg(args, 'u');
 313
 314         if (a_uid == NULL) {
 315                 if (a_name == NULL)
 316                         errx(EX_DATAERR, "user name or id required");
 317
 318                 /*
 319                  * Determine whether 'n' switch is name or uid - we don't
 320                  * really don't really care which we have, but we need to
 321                  * know.
 322                  */
 323                 if (mode != M_ADD && pwd == NULL
 324                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 325                     && atoi(a_name->val) > 0) { /* Assume uid */
 326                         (a_uid = a_name)->ch = 'u';
 327                         a_name = NULL;
 328                 }
 329         }
 330
 331         /*
 332          * Update, delete & print require that the user exists
 333          */
 334         if (mode == M_UPDATE || mode == M_DELETE ||
 335             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 336
 337                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 338                         pwd = GETPWUID(atoi(a_uid->val));
 339
 340                 if (pwd == NULL) {
 341                         if (mode == M_PRINT && getarg(args, 'F')) {
 342                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 343                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 344                                 return print_user(&fakeuser,
 345                                                   getarg(args, 'P') != NULL,
 346                                                   getarg(args, '7') != NULL);
 347                         }
 348                         if (a_name == NULL)
 349                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 350                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 351                 }
 352
 353                 if (a_name == NULL)     /* May be needed later */
 354                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 355
 356                 /*
 357                  * The M_LOCK and M_UNLOCK functions simply add or remove
 358                  * a "*LOCKED*" prefix from in front of the password to
 359                  * prevent it decoding correctly, and therefore prevents
 360                  * access. Of course, this only prevents access via
 361                  * password authentication (not ssh, kerberos or any
 362                  * other method that does not use the UNIX password) but
 363                  * that is a known limitation.
 364                  */
 365
 366                 if (mode == M_LOCK) {
 367                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 368                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 369                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 370                         if (passtmp == NULL)    /* disaster */
 371                                 errx(EX_UNAVAILABLE, "out of memory");
 372                         strcpy(passtmp, locked_str);
 373                         strcat(passtmp, pwd->pw_passwd);
 374                         pwd->pw_passwd = passtmp;
 375                         edited = 1;
 376                 } else if (mode == M_UNLOCK) {
 377                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 378                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 379                         pwd->pw_passwd += sizeof(locked_str)-1;
 380                         edited = 1;
 381                 } else if (mode == M_DELETE) {
 382                         /*
 383                          * Handle deletions now
 384                          */
 385                         char            file[MAXPATHLEN];
 386                         char            home[MAXPATHLEN];
 387                         uid_t           uid = pwd->pw_uid;
 388
 389                         if (strcmp(pwd->pw_name, "root") == 0)
 390                                 errx(EX_DATAERR, "cannot remove user 'root'");
 391
 392                         if (!PWALTDIR()) {
 393                                 /*
 394                                  * Remove opie record from /etc/opiekeys
 395                                  */
 396
 397                                 rmopie(pwd->pw_name);
 398
 399                                 /*
 400                                  * Remove crontabs
 401                                  */
 402                                 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
 403                                 if (access(file, F_OK) == 0) {
 404                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 405                                         system(file);
 406                                 }
 407                         }
 408                         /*
 409                          * Save these for later, since contents of pwd may be
 410                          * invalidated by deletion
 411                          */
 412                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 413                         strlcpy(home, pwd->pw_dir, sizeof(home));
 414
 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                                 warn("passwd update");
 420                                 return EX_IOERR;
 421                         }
 422
 423                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 424                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 425                                 if (rc == -1)
 426                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 427                                 else if (rc != 0)
 428                                         warn("WARNING: NIS passwd update");
 429                                 /* non-fatal */
 430                         }
 431
 432                         editgroups(a_name->val, NULL);
 433
 434                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 435
 436                         if (!PWALTDIR()) {
 437                                 /*
 438                                  * Remove mail file
 439                                  */
 440                                 remove(file);
 441
 442                                 /*
 443                                  * Remove at jobs
 444                                  */
 445                                 if (getpwuid(uid) == NULL)
 446                                         rmat(uid);
 447
 448                                 /*
 449                                  * Remove home directory and contents
 450                                  */
 451                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 452                                         if (stat(home, &st) != -1) {
 453                                                 rm_r(home, uid);
 454                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 455                                                        a_name->val, (long) uid, home,
 456                                                        stat(home, &st) == -1 ? "" : "not completely ");
 457                                         }
 458                                 }
 459                         }
 460                         return EXIT_SUCCESS;
 461                 } else if (mode == M_PRINT)
 462                         return print_user(pwd,
 463                                           getarg(args, 'P') != NULL,
 464                                           getarg(args, '7') != NULL);
 465
 466                 /*
 467                  * The rest is edit code
 468                  */
 469                 if ((arg = getarg(args, 'l')) != NULL) {
 470                         if (strcmp(pwd->pw_name, "root") == 0)
 471                                 errx(EX_DATAERR, "can't rename `root' account");
 472                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 473                         edited = 1;
 474                 }
 475
 476                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 477                         pwd->pw_uid = (uid_t) atol(arg->val);
 478                         edited = 1;
 479                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 480                                 errx(EX_DATAERR, "can't change uid of `root' account");
 481                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 482                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 483                 }
 484
 485                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 486                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 487                         if (newgid != pwd->pw_gid) {
 488                                 edited = 1;
 489                                 pwd->pw_gid = newgid;
 490                         }
 491                 }
 492
 493                 if ((arg = getarg(args, 'p')) != NULL) {
 494                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 495                                 if (pwd->pw_change != 0) {
 496                                         pwd->pw_change = 0;
 497                                         edited = 1;
 498                                 }
 499                         }
 500                         else {
 501                                 time_t          now = time(NULL);
 502                                 time_t          expire = parse_date(now, arg->val);
 503
 504                                 if (now == expire)
 505                                         errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
 506                                 if (pwd->pw_change != expire) {
 507                                         pwd->pw_change = expire;
 508                                         edited = 1;
 509                                 }
 510                         }
 511                 }
 512
 513                 if ((arg = getarg(args, 'e')) != NULL) {
 514                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 515                                 if (pwd->pw_expire != 0) {
 516                                         pwd->pw_expire = 0;
 517                                         edited = 1;
 518                                 }
 519                         }
 520                         else {
 521                                 time_t          now = time(NULL);
 522                                 time_t          expire = parse_date(now, arg->val);
 523
 524                                 if (now == expire)
 525                                         errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
 526                                 if (pwd->pw_expire != expire) {
 527                                         pwd->pw_expire = expire;
 528                                         edited = 1;
 529                                 }
 530                         }
 531                 }
 532
 533                 if ((arg = getarg(args, 's')) != NULL) {
 534                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 535                         if (shell == NULL)
 536                                 shell = "";
 537                         if (strcmp(shell, pwd->pw_shell) != 0) {
 538                                 pwd->pw_shell = shell;
 539                                 edited = 1;
 540                         }
 541                 }
 542
 543                 if (getarg(args, 'L')) {
 544                         if (cnf->default_class == NULL)
 545                                 cnf->default_class = "";
 546                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 547                                 pwd->pw_class = cnf->default_class;
 548                                 edited = 1;
 549                         }
 550                 }
 551
 552                 if ((arg  = getarg(args, 'd')) != NULL) {
 553                         if (strcmp(pwd->pw_dir, arg->val))
 554                                 edited = 1;
 555                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 556                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 557                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 558                         } else if (!S_ISDIR(st.st_mode))
 559                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 560                 }
 561
 562                 if ((arg = getarg(args, 'w')) != NULL &&
 563                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 564                         login_cap_t *lc;
 565
 566                         lc = login_getpwclass(pwd);
 567                         if (lc == NULL ||
 568                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 569                                 warn("setting crypt(3) format");
 570                         login_close(lc);
 571                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 572                         edited = 1;
 573                 }
 574
 575         } else {
 576                 login_cap_t *lc;
 577
 578                 /*
 579                  * Add code
 580                  */
 581
 582                 if (a_name == NULL)     /* Required */
 583                         errx(EX_DATAERR, "login name required");
 584                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 585                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 586
 587                 /*
 588                  * Now, set up defaults for a new user
 589                  */
 590                 pwd = &fakeuser;
 591                 pwd->pw_name = a_name->val;
 592                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 593                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 594                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 595                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 596                 pwd->pw_expire = pw_exppolicy(cnf, args);
 597                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 598                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 599                 lc = login_getpwclass(pwd);
 600                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 601                         warn("setting crypt(3) format");
 602                 login_close(lc);
 603                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 604                 edited = 1;
 605
 606                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 607                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 608         }
 609
 610         /*
 611          * Shared add/edit code
 612          */
 613         if ((arg = getarg(args, 'c')) != NULL) {
 614                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 615                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 616                         pwd->pw_gecos = gecos;
 617                         edited = 1;
 618                 }
 619         }
 620
 621         if ((arg = getarg(args, 'h')) != NULL ||
 622             (arg = getarg(args, 'H')) != NULL) {
 623                 if (strcmp(arg->val, "-") == 0) {
 624                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 625                                 pwd->pw_passwd = "*";   /* No access */
 626                                 edited = 1;
 627                         }
 628                 } else {
 629                         int             fd = atoi(arg->val);
 630                         int             precrypt = (arg->ch == 'H');
 631                         int             b;
 632                         int             istty = isatty(fd);
 633                         struct termios  t;
 634                         login_cap_t     *lc;
 635
 636                         if (istty) {
 637                                 if (tcgetattr(fd, &t) == -1)
 638                                         istty = 0;
 639                                 else {
 640                                         struct termios  n = t;
 641
 642                                         /* Disable echo */
 643                                         n.c_lflag &= ~(ECHO);
 644                                         tcsetattr(fd, TCSANOW, &n);
 645                                         printf("%s%spassword for user %s:",
 646                                              (mode == M_UPDATE) ? "new " : "",
 647                                              precrypt ? "encrypted " : "",
 648                                              pwd->pw_name);
 649                                         fflush(stdout);
 650                                 }
 651                         }
 652                         b = read(fd, line, sizeof(line) - 1);
 653                         if (istty) {    /* Restore state */
 654                                 tcsetattr(fd, TCSANOW, &t);
 655                                 fputc('\n', stdout);
 656                                 fflush(stdout);
 657                         }
 658                         if (b < 0) {
 659                                 warn("-%c file descriptor", precrypt ? 'H' :
 660                                     'h');
 661                                 return EX_IOERR;
 662                         }
 663                         line[b] = '\0';
 664                         if ((p = strpbrk(line, "\r\n")) != NULL)
 665                                 *p = '\0';
 666                         if (!*line)
 667                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 668                         if (precrypt) {
 669                                 if (strchr(line, ':') != NULL)
 670                                         return EX_DATAERR;
 671                                 pwd->pw_passwd = line;
 672                         } else {
 673                                 lc = login_getpwclass(pwd);
 674                                 if (lc == NULL ||
 675                                     login_setcryptfmt(lc, "md5", NULL) == NULL)
 676                                         warn("setting crypt(3) format");
 677                                 login_close(lc);
 678                                 pwd->pw_passwd = pw_pwcrypt(line);
 679                         }
 680                         edited = 1;
 681                 }
 682         }
 683
 684         /*
 685          * Special case: -N only displays & exits
 686          */
 687         if (getarg(args, 'N') != NULL)
 688                 return print_user(pwd,
 689                                   getarg(args, 'P') != NULL,
 690                                   getarg(args, '7') != NULL);
 691
 692         if (mode == M_ADD) {
 693                 edited = 1;     /* Always */
 694                 rc = addpwent(pwd);
 695                 if (rc == -1) {
 696                         warnx("user '%s' already exists", pwd->pw_name);
 697                         return EX_IOERR;
 698                 } else if (rc != 0) {
 699                         warn("passwd file update");
 700                         return EX_IOERR;
 701                 }
 702                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 703                         rc = addnispwent(cnf->nispasswd, pwd);
 704                         if (rc == -1)
 705                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 706                         else
 707                                 warn("NIS passwd update");
 708                         /* NOTE: we treat NIS-only update errors as non-fatal */
 709                 }
 710         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 711                 if (edited) {   /* Only updated this if required */
 712                         rc = chgpwent(a_name->val, pwd);
 713                         if (rc == -1) {
 714                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 715                                 return EX_IOERR;
 716                         } else if (rc != 0) {
 717                                 warn("passwd file update");
 718                                 return EX_IOERR;
 719                         }
 720                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 721                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 722                                 if (rc == -1)
 723                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 724                                 else
 725                                         warn("NIS passwd update");
 726                                 /* NOTE: NIS-only update errors are not fatal */
 727                         }
 728                 }
 729         }
 730
 731         /*
 732          * Ok, user is created or changed - now edit group file
 733          */
 734
 735         if (mode == M_ADD || getarg(args, 'G') != NULL)
 736                 editgroups(pwd->pw_name, cnf->groups);
 737
 738         /* go get a current version of pwd */
 739         pwd = GETPWNAM(a_name->val);
 740         if (pwd == NULL) {
 741                 /* This will fail when we rename, so special case that */
 742                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 743                         a_name->val = arg->val;         /* update new name */
 744                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 745                 }
 746         }
 747         if (pwd == NULL)        /* can't go on without this */
 748                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 749
 750         grp = GETGRGID(pwd->pw_gid);
 751         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 752                pwd->pw_name, (long) pwd->pw_uid,
 753             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 754                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 755
 756         /*
 757          * If adding, let's touch and chown the user's mail file. This is not
 758          * strictly necessary under BSD with a 0755 maildir but it also
 759          * doesn't hurt anything to create the empty mailfile
 760          */
 761         if (mode == M_ADD) {
 762                 if (!PWALTDIR()) {
 763                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 764                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 765                                                                          * mtime */
 766                         chown(line, pwd->pw_uid, pwd->pw_gid);
 767                 }
 768         }
 769
 770         /*
 771          * Let's create and populate the user's home directory. Note
 772          * that this also `works' for editing users if -m is used, but
 773          * existing files will *not* be overwritten.
 774          */
 775         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 776                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 777                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 778                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 779         }
 780
 781
 782         /*
 783          * Finally, send mail to the new user as well, if we are asked to
 784          */
 785         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 786                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 787
 788                 if (pfp == NULL)
 789                         warn("sendmail");
 790                 else {
 791                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 792                         while (fgets(line, sizeof(line), fp) != NULL) {
 793                                 /* Do substitutions? */
 794                                 fputs(line, pfp);
 795                         }
 796                         pclose(pfp);
 797                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 798                             pwd->pw_name, (long) pwd->pw_uid);
 799                 }
 800                 fclose(fp);
 801         }
 802
 803         return EXIT_SUCCESS;
 804 }
 805
 806
 807 static          uid_t
 808 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 809 {
 810         struct passwd  *pwd;
 811         uid_t           uid = (uid_t) - 1;
 812         struct carg    *a_uid = getarg(args, 'u');
 813
 814         /*
 815          * Check the given uid, if any
 816          */
 817         if (a_uid != NULL) {
 818                 uid = (uid_t) atol(a_uid->val);
 819
 820                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 821                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 822         } else {
 823                 struct bitmap   bm;
 824
 825                 /*
 826                  * We need to allocate the next available uid under one of
 827                  * two policies a) Grab the first unused uid b) Grab the
 828                  * highest possible unused uid
 829                  */
 830                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 831                                                          * claus^H^H^H^Hheck */
 832                         cnf->min_uid = 1000;
 833                         cnf->max_uid = 32000;
 834                 }
 835                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 836
 837                 /*
 838                  * Now, let's fill the bitmap from the password file
 839                  */
 840                 SETPWENT();
 841                 while ((pwd = GETPWENT()) != NULL)
 842                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 843                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 844                 ENDPWENT();
 845
 846                 /*
 847                  * Then apply the policy, with fallback to reuse if necessary
 848                  */
 849                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 850                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 851
 852                 /*
 853                  * Another sanity check
 854                  */
 855                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 856                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 857                 bm_dealloc(&bm);
 858         }
 859         return uid;
 860 }
 861
 862
 863 static          uid_t
 864 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 865 {
 866         struct group   *grp;
 867         gid_t           gid = (uid_t) - 1;
 868         struct carg    *a_gid = getarg(args, 'g');
 869
 870         /*
 871          * If no arg given, see if default can help out
 872          */
 873         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 874                 a_gid = addarg(args, 'g', cnf->default_group);
 875
 876         /*
 877          * Check the given gid, if any
 878          */
 879         SETGRENT();
 880         if (a_gid != NULL) {
 881                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 882                         gid = (gid_t) atol(a_gid->val);
 883                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 884                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 885                 }
 886                 gid = grp->gr_gid;
 887         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 888                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 889         } else {
 890                 struct cargs    grpargs;
 891                 char            tmp[32];
 892
 893                 LIST_INIT(&grpargs);
 894                 addarg(&grpargs, 'n', nam);
 895
 896                 /*
 897                  * We need to auto-create a group with the user's name. We
 898                  * can send all the appropriate output to our sister routine
 899                  * bit first see if we can create a group with gid==uid so we
 900                  * can keep the user and group ids in sync. We purposely do
 901                  * NOT check the gid range if we can force the sync. If the
 902                  * user's name dups an existing group, then the group add
 903                  * function will happily handle that case for us and exit.
 904                  */
 905                 if (GETGRGID(prefer) == NULL) {
 906                         sprintf(tmp, "%lu", (unsigned long) prefer);
 907                         addarg(&grpargs, 'g', tmp);
 908                 }
 909                 if (getarg(args, 'N'))
 910                 {
 911                         addarg(&grpargs, 'N', NULL);
 912                         addarg(&grpargs, 'q', NULL);
 913                         gid = pw_group(cnf, M_NEXT, &grpargs);
 914                 }
 915                 else
 916                 {
 917                         pw_group(cnf, M_ADD, &grpargs);
 918                         if ((grp = GETGRNAM(nam)) != NULL)
 919                                 gid = grp->gr_gid;
 920                 }
 921                 a_gid = LIST_FIRST(&grpargs);
 922                 while (a_gid != NULL) {
 923                         struct carg    *t = LIST_NEXT(a_gid, list);
 924                         LIST_REMOVE(a_gid, list);
 925                         a_gid = t;
 926                 }
 927         }
 928         ENDGRENT();
 929         return gid;
 930 }
 931
 932
 933 static          time_t
 934 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 935 {
 936         time_t          result = 0;
 937         time_t          now = time(NULL);
 938         struct carg    *arg = getarg(args, 'p');
 939
 940         if (arg != NULL) {
 941                 if ((result = parse_date(now, arg->val)) == now)
 942                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 943         } else if (cnf->password_days > 0)
 944                 result = now + ((long) cnf->password_days * 86400L);
 945         return result;
 946 }
 947
 948
 949 static          time_t
 950 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 951 {
 952         time_t          result = 0;
 953         time_t          now = time(NULL);
 954         struct carg    *arg = getarg(args, 'e');
 955
 956         if (arg != NULL) {
 957                 if ((result = parse_date(now, arg->val)) == now)
 958                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 959         } else if (cnf->expire_days > 0)
 960                 result = now + ((long) cnf->expire_days * 86400L);
 961         return result;
 962 }
 963
 964
 965 static char    *
 966 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 967 {
 968         struct carg    *arg = getarg(args, 'd');
 969
 970         if (arg)
 971                 return arg->val;
 972         else {
 973                 static char     home[128];
 974
 975                 if (cnf->home == NULL || *cnf->home == '\0')
 976                         errx(EX_CONFIG, "no base home directory set");
 977                 sprintf(home, "%s/%s", cnf->home, user);
 978                 return home;
 979         }
 980 }
 981
 982 static char    *
 983 shell_path(char const * path, char *shells[], char *sh)
 984 {
 985         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 986                 return sh;      /* specified full path or forced none */
 987         else {
 988                 char           *p;
 989                 char            paths[_UC_MAXLINE];
 990
 991                 /*
 992                  * We need to search paths
 993                  */
 994                 strlcpy(paths, path, sizeof(paths));
 995                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 996                         int             i;
 997                         static char     shellpath[256];
 998
 999                         if (sh != NULL) {
1000                                 sprintf(shellpath, "%s/%s", p, sh);
1001                                 if (access(shellpath, X_OK) == 0)
1002                                         return shellpath;
1003                         } else
1004                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
1005                                         sprintf(shellpath, "%s/%s", p, shells[i]);
1006                                         if (access(shellpath, X_OK) == 0)
1007                                                 return shellpath;
1008                                 }
1009                 }
1010                 if (sh == NULL)
1011                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1012                 errx(EX_CONFIG, "no default shell available or defined");
1013                 return NULL;
1014         }
1015 }
1016
1017
1018 static char    *
1019 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1020 {
1021         char           *sh = newshell;
1022         struct carg    *arg = getarg(args, 's');
1023
1024         if (newshell == NULL && arg != NULL)
1025                 sh = arg->val;
1026         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1027 }
1028
1029 #define SALTSIZE        32
1030
1031 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1032
1033 char           *
1034 pw_pwcrypt(char *password)
1035 {
1036         int             i;
1037         char            salt[SALTSIZE + 1];
1038
1039         static char     buf[256];
1040
1041         /*
1042          * Calculate a salt value
1043          */
1044         for (i = 0; i < SALTSIZE; i++)
1045                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1046         salt[SALTSIZE] = '\0';
1047
1048         return strcpy(buf, crypt(password, salt));
1049 }
1050
1051
1052 static char    *
1053 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1054 {
1055         int             i, l;
1056         char            pwbuf[32];
1057
1058         switch (cnf->default_password) {
1059         case -1:                /* Random password */
1060                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1061                 for (i = 0; i < l; i++)
1062                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1063                 pwbuf[i] = '\0';
1064
1065                 /*
1066                  * We give this information back to the user
1067                  */
1068                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1069                     getarg(args, 'N') == NULL) {
1070                         if (isatty(STDOUT_FILENO))
1071                                 printf("Password for '%s' is: ", user);
1072                         printf("%s\n", pwbuf);
1073                         fflush(stdout);
1074                 }
1075                 break;
1076
1077         case -2:                /* No password at all! */
1078                 return "";
1079
1080         case 0:         /* No login - default */
1081         default:
1082                 return "*";
1083
1084         case 1:         /* user's name */
1085                 strlcpy(pwbuf, user, sizeof(pwbuf));
1086                 break;
1087         }
1088         return pw_pwcrypt(pwbuf);
1089 }
1090
1091
1092 static int
1093 print_user(struct passwd * pwd, int pretty, int v7)
1094 {
1095         if (!pretty) {
1096                 char            buf[_UC_MAXLINE];
1097
1098                 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
1099                 fputs(buf, stdout);
1100         } else {
1101                 int             j;
1102                 char           *p;
1103                 struct group   *grp = GETGRGID(pwd->pw_gid);
1104                 char            uname[60] = "User &", office[60] = "[None]",
1105                                 wphone[60] = "[None]", hphone[60] = "[None]";
1106                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1107                 struct tm *    tptr;
1108
1109                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1110                         strlcpy(uname, p, sizeof(uname));
1111                         if ((p = strtok(NULL, ",")) != NULL) {
1112                                 strlcpy(office, p, sizeof(office));
1113                                 if ((p = strtok(NULL, ",")) != NULL) {
1114                                         strlcpy(wphone, p, sizeof(wphone));
1115                                         if ((p = strtok(NULL, "")) != NULL) {
1116                                                 strlcpy(hphone, p,
1117                                                     sizeof(hphone));
1118                                         }
1119                                 }
1120                         }
1121                 }
1122                 /*
1123                  * Handle '&' in gecos field
1124                  */
1125                 if ((p = strchr(uname, '&')) != NULL) {
1126                         int             l = strlen(pwd->pw_name);
1127                         int             m = strlen(p);
1128
1129                         memmove(p + l, p + 1, m);
1130                         memmove(p, pwd->pw_name, l);
1131                         *p = (char) toupper((unsigned char)*p);
1132                 }
1133                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1134                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1135                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1136                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1137                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1138                        " Full Name: %s\n"
1139                        "      Home: %-26.26s      Class: %s\n"
1140                        "     Shell: %-26.26s     Office: %s\n"
1141                        "Work Phone: %-26.26s Home Phone: %s\n"
1142                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1143                        pwd->pw_name, (long) pwd->pw_uid,
1144                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1145                        uname, pwd->pw_dir, pwd->pw_class,
1146                        pwd->pw_shell, office, wphone, hphone,
1147                        acexpire, pwexpire);
1148                 SETGRENT();
1149                 j = 0;
1150                 while ((grp=GETGRENT()) != NULL)
1151                 {
1152                         int     i = 0;
1153                         while (grp->gr_mem[i] != NULL)
1154                         {
1155                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1156                                 {
1157                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1158                                         break;
1159                                 }
1160                                 ++i;
1161                         }
1162                 }
1163                 ENDGRENT();
1164                 printf("%s", j ? "\n" : "");
1165         }
1166         return EXIT_SUCCESS;
1167 }
1168
1169 char    *
1170 pw_checkname(u_char *name, int gecos)
1171 {
1172         char showch[8];
1173         u_char const *badchars, *ch, *showtype;
1174         int reject;
1175
1176         ch = name;
1177         reject = 0;
1178         if (gecos) {
1179                 /* See if the name is valid as a gecos (comment) field. */
1180                 badchars = ":!@";
1181                 showtype = "gecos field";
1182         } else {
1183                 /* See if the name is valid as a userid or group. */
1184                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1185                 showtype = "userid/group name";
1186                 /* Userids and groups can not have a leading '-'. */
1187                 if (*ch == '-')
1188                         reject = 1;
1189         }
1190         if (!reject) {
1191                 while (*ch) {
1192                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1193                             *ch == 127) {
1194                                 reject = 1;
1195                                 break;
1196                         }
1197                         /* 8-bit characters are only allowed in GECOS fields */
1198                         if (!gecos && (*ch & 0x80)) {
1199                                 reject = 1;
1200                                 break;
1201                         }
1202                         ch++;
1203                 }
1204         }
1205         /*
1206          * A `$' is allowed as the final character for userids and groups,
1207          * mainly for the benefit of samba.
1208          */
1209         if (reject && !gecos) {
1210                 if (*ch == '$' && *(ch + 1) == '\0') {
1211                         reject = 0;
1212                         ch++;
1213                 }
1214         }
1215         if (reject) {
1216                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1217                     ? "`%c'" : "0x%02x", *ch);
1218                 errx(EX_DATAERR, "invalid character %s at position %d in %s",
1219                     showch, (ch - name), showtype);
1220         }
1221         if (!gecos && (ch - name) > LOGNAMESIZE)
1222                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1223                     LOGNAMESIZE);
1224         return (char *)name;
1225 }
1226
1227
1228 static void
1229 rmat(uid_t uid)
1230 {
1231         DIR            *d = opendir("/var/at/jobs");
1232
1233         if (d != NULL) {
1234                 struct dirent  *e;
1235
1236                 while ((e = readdir(d)) != NULL) {
1237                         struct stat     st;
1238
1239                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1240                             stat(e->d_name, &st) == 0 &&
1241                             !S_ISDIR(st.st_mode) &&
1242                             st.st_uid == uid) {
1243                                 char            tmp[MAXPATHLEN];
1244
1245                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1246                                 system(tmp);
1247                         }
1248                 }
1249                 closedir(d);
1250         }
1251 }
1252
1253 static void
1254 rmopie(char const * name)
1255 {
1256         static const char etcopie[] = "/etc/opiekeys";
1257         FILE   *fp = fopen(etcopie, "r+");
1258
1259         if (fp != NULL) {
1260                 char    tmp[1024];
1261                 off_t   atofs = 0;
1262                 int     length = strlen(name);
1263
1264                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1265                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1266                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1267                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1268                                 }
1269                                 break;
1270                         }
1271                         atofs = ftell(fp);
1272                 }
1273                 /*
1274                  * If we got an error of any sort, don't update!
1275                  */
1276                 fclose(fp);
1277         }
1278 }
1279