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  * $FreeBSD: src/usr.sbin/pw/pw_user.c,v 1.72 2012/02/22 06:27:20 kevlo Exp $
  27  */
  28
  29 #include <ctype.h>
  30 #include <err.h>
  31 #include <fcntl.h>
  32 #include <sys/param.h>
  33 #include <dirent.h>
  34 #include <paths.h>
  35 #include <termios.h>
  36 #include <sys/types.h>
  37 #include <sys/time.h>
  38 #include <sys/resource.h>
  39 #include <unistd.h>
  40 #include <login_cap.h>
  41 #include "pw.h"
  42 #include "bitmap.h"
  43
  44 #define LOGNAMESIZE (MAXLOGNAME-1)
  45
  46 static          char locked_str[] = "*LOCKED*";
  47
  48 static int      print_user(struct passwd * pwd, int pretty, int v7);
  49 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  50 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  51 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  52 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  53 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  54 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  55 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  56 static char    *shell_path(char const * path, char *shells[], char *sh);
  57 static void     rmat(uid_t uid);
  58 static void     rmopie(char const * name);
  59
  60 /*-
  61  * -C config      configuration file
  62  * -q             quiet operation
  63  * -n name        login name
  64  * -u uid         user id
  65  * -c comment     user name/comment
  66  * -d directory   home directory
  67  * -e date        account expiry date
  68  * -p date        password expiry date
  69  * -g grp         primary group
  70  * -G grp1,grp2   additional groups
  71  * -m [ -k dir ]  create and set up home
  72  * -s shell       name of login shell
  73  * -o             duplicate uid ok
  74  * -L class       user class
  75  * -l name        new login name
  76  * -h fd          password filehandle
  77  * -H fd          encrypted password filehandle
  78  * -F             force print or add
  79  *   Setting defaults:
  80  * -D             set user defaults
  81  * -b dir         default home root dir
  82  * -e period      default expiry period
  83  * -p period      default password change period
  84  * -g group       default group
  85  * -G             grp1,grp2.. default additional groups
  86  * -L class       default login class
  87  * -k dir         default home skeleton
  88  * -s shell       default shell
  89  * -w method      default password method
  90  */
  91
  92 int
  93 pw_user(struct userconf * cnf, int mode, struct cargs * args)
  94 {
  95         int             rc, edited = 0;
  96         char           *p = NULL;
  97         char                                     *passtmp;
  98         struct carg    *a_name;
  99         struct carg    *a_uid;
 100         struct carg    *arg;
 101         struct passwd  *pwd = NULL;
 102         struct group   *grp;
 103         struct stat     st;
 104         char            line[_PASSWORD_LEN+1];
 105         FILE           *fp;
 106         char *dmode_c;
 107         void *set = NULL;
 108
 109         static struct passwd fakeuser =
 110         {
 111                 NULL,
 112                 "*",
 113                 -1,
 114                 -1,
 115                 0,
 116                 "",
 117                 "User &",
 118                 "/nonexistent",
 119                 "/bin/sh",
 120                 0
 121                 ,0
 122         };
 123
 124
 125         /*
 126          * With M_NEXT, we only need to return the
 127          * next uid to stdout
 128          */
 129         if (mode == M_NEXT)
 130         {
 131                 uid_t next = pw_uidpolicy(cnf, args);
 132                 if (getarg(args, 'q'))
 133                         return next;
 134                 printf("%ld:", (long)next);
 135                 pw_group(cnf, mode, args);
 136                 return EXIT_SUCCESS;
 137         }
 138
 139         /*
 140          * We can do all of the common legwork here
 141          */
 142
 143         if ((arg = getarg(args, 'b')) != NULL) {
 144                 cnf->home = arg->val;
 145         }
 146
 147         if ((arg = getarg(args, 'M')) != NULL) {
 148                 dmode_c = arg->val;
 149                 if ((set = setmode(dmode_c)) == NULL)
 150                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 151                             dmode_c);
 152                 cnf->homemode = getmode(set, _DEF_DIRMODE);
 153                 free(set);
 154         }
 155
 156         /*
 157          * If we'll need to use it or we're updating it,
 158          * then create the base home directory if necessary
 159          */
 160         if (arg != NULL || getarg(args, 'm') != NULL) {
 161                 int     l = strlen(cnf->home);
 162
 163                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 164                         cnf->home[--l] = '\0';
 165
 166                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 167                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 168
 169                 if (stat(cnf->home, &st) == -1) {
 170                         char    dbuf[MAXPATHLEN];
 171
 172                         /*
 173                          * This is a kludge especially for Joerg :)
 174                          * If the home directory would be created in the root partition, then
 175                          * we really create it under /usr which is likely to have more space.
 176                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 177                          */
 178                         if (strchr(cnf->home+1, '/') == NULL) {
 179                                 strcpy(dbuf, "/usr");
 180                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 181                                 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 182                                         chown(dbuf, 0, 0);
 183                                         /*
 184                                          * Skip first "/" and create symlink:
 185                                          * /home -> usr/home
 186                                          */
 187                                         symlink(dbuf+1, cnf->home);
 188                                 }
 189                                 /* If this falls, fall back to old method */
 190                         }
 191                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 192                         p = dbuf;
 193                         if (stat(dbuf, &st) == -1) {
 194                                 while ((p = strchr(++p, '/')) != NULL) {
 195                                         *p = '\0';
 196                                         if (stat(dbuf, &st) == -1) {
 197                                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1)
 198                                                         goto direrr;
 199                                                 chown(dbuf, 0, 0);
 200                                         } else if (!S_ISDIR(st.st_mode))
 201                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 202                                         *p = '/';
 203                                 }
 204                         }
 205                         if (stat(dbuf, &st) == -1) {
 206                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1) {
 207                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 208                                 }
 209                                 chown(dbuf, 0, 0);
 210                         }
 211                 } else if (!S_ISDIR(st.st_mode))
 212                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 213         }
 214
 215         if ((arg = getarg(args, 'e')) != NULL)
 216                 cnf->expire_days = atoi(arg->val);
 217
 218         if ((arg = getarg(args, 'y')) != NULL)
 219                 cnf->nispasswd = arg->val;
 220
 221         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 222                 cnf->password_days = atoi(arg->val);
 223
 224         if ((arg = getarg(args, 'g')) != NULL) {
 225                 if (!*(p = arg->val))   /* Handle empty group list specially */
 226                         cnf->default_group = "";
 227                 else {
 228                         if ((grp = GETGRNAM(p)) == NULL) {
 229                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 230                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 231                         }
 232                         cnf->default_group = newstr(grp->gr_name);
 233                 }
 234         }
 235         if ((arg = getarg(args, 'L')) != NULL)
 236                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 237
 238         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 239                 int i = 0;
 240
 241                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 242                         if ((grp = GETGRNAM(p)) == NULL) {
 243                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 244                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 245                         }
 246                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 247                                 cnf->groups[i++] = newstr(grp->gr_name);
 248                 }
 249                 while (i < cnf->numgroups)
 250                         cnf->groups[i++] = NULL;
 251         }
 252
 253         if ((arg = getarg(args, 'k')) != NULL) {
 254                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 255                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 256         }
 257
 258         if ((arg = getarg(args, 's')) != NULL)
 259                 cnf->shell_default = arg->val;
 260
 261         if ((arg = getarg(args, 'w')) != NULL)
 262                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 263         if (mode == M_ADD && getarg(args, 'D')) {
 264                 if (getarg(args, 'n') != NULL)
 265                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 266                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 267                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 268                                 cnf->min_uid = 1000;
 269                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 270                                 cnf->max_uid = 32000;
 271                 }
 272                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 273                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 274                                 cnf->min_gid = 1000;
 275                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 276                                 cnf->max_gid = 32000;
 277                 }
 278
 279                 arg = getarg(args, 'C');
 280                 if (write_userconfig(arg ? arg->val : NULL))
 281                         return EXIT_SUCCESS;
 282                 warn("config update");
 283                 return EX_IOERR;
 284         }
 285
 286         if (mode == M_PRINT && getarg(args, 'a')) {
 287                 int             pretty = getarg(args, 'P') != NULL;
 288                 int             v7 = getarg(args, '7') != NULL;
 289
 290                 SETPWENT();
 291                 while ((pwd = GETPWENT()) != NULL)
 292                         print_user(pwd, pretty, v7);
 293                 ENDPWENT();
 294                 return EXIT_SUCCESS;
 295         }
 296
 297         if ((a_name = getarg(args, 'n')) != NULL)
 298                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 299         a_uid = getarg(args, 'u');
 300
 301         if (a_uid == NULL) {
 302                 if (a_name == NULL)
 303                         errx(EX_DATAERR, "user name or id required");
 304
 305                 /*
 306                  * Determine whether 'n' switch is name or uid - we don't
 307                  * really don't really care which we have, but we need to
 308                  * know.
 309                  */
 310                 if (mode != M_ADD && pwd == NULL
 311                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 312                     && atoi(a_name->val) > 0) { /* Assume uid */
 313                         (a_uid = a_name)->ch = 'u';
 314                         a_name = NULL;
 315                 }
 316         }
 317
 318         /*
 319          * Update, delete & print require that the user exists
 320          */
 321         if (mode == M_UPDATE || mode == M_DELETE ||
 322             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 323
 324                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 325                         pwd = GETPWUID(atoi(a_uid->val));
 326
 327                 if (pwd == NULL) {
 328                         if (mode == M_PRINT && getarg(args, 'F')) {
 329                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 330                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 331                                 return print_user(&fakeuser,
 332                                                   getarg(args, 'P') != NULL,
 333                                                   getarg(args, '7') != NULL);
 334                         }
 335                         if (a_name == NULL)
 336                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 337                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 338                 }
 339
 340                 if (a_name == NULL)     /* May be needed later */
 341                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 342
 343                 /*
 344                  * The M_LOCK and M_UNLOCK functions simply add or remove
 345                  * a "*LOCKED*" prefix from in front of the password to
 346                  * prevent it decoding correctly, and therefore prevents
 347                  * access. Of course, this only prevents access via
 348                  * password authentication (not ssh, kerberos or any
 349                  * other method that does not use the UNIX password) but
 350                  * that is a known limitation.
 351                  */
 352
 353                 if (mode == M_LOCK) {
 354                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 355                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 356                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 357                         if (passtmp == NULL)    /* disaster */
 358                                 errx(EX_UNAVAILABLE, "out of memory");
 359                         strcpy(passtmp, locked_str);
 360                         strcat(passtmp, pwd->pw_passwd);
 361                         pwd->pw_passwd = passtmp;
 362                         edited = 1;
 363                 } else if (mode == M_UNLOCK) {
 364                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 365                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 366                         pwd->pw_passwd += sizeof(locked_str)-1;
 367                         edited = 1;
 368                 } else if (mode == M_DELETE) {
 369                         /*
 370                          * Handle deletions now
 371                          */
 372                         char            file[MAXPATHLEN];
 373                         char            home[MAXPATHLEN];
 374                         uid_t           uid = pwd->pw_uid;
 375
 376                         if (strcmp(pwd->pw_name, "root") == 0)
 377                                 errx(EX_DATAERR, "cannot remove user 'root'");
 378
 379                         if (!PWALTDIR()) {
 380                                 /*
 381                                  * Remove opie record from /etc/opiekeys
 382                                  */
 383
 384                                 rmopie(pwd->pw_name);
 385
 386                                 /*
 387                                  * Remove crontabs
 388                                  */
 389                                 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
 390                                 if (access(file, F_OK) == 0) {
 391                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 392                                         system(file);
 393                                 }
 394                         }
 395                         /*
 396                          * Save these for later, since contents of pwd may be
 397                          * invalidated by deletion
 398                          */
 399                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 400                         strlcpy(home, pwd->pw_dir, sizeof(home));
 401
 402                         rc = delpwent(pwd);
 403                         if (rc == -1)
 404                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 405                         else if (rc != 0) {
 406                                 warn("passwd update");
 407                                 return EX_IOERR;
 408                         }
 409
 410                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 411                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 412                                 if (rc == -1)
 413                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 414                                 else if (rc != 0)
 415                                         warn("WARNING: NIS passwd update");
 416                                 /* non-fatal */
 417                         }
 418
 419                         editgroups(a_name->val, NULL);
 420
 421                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 422
 423                         if (!PWALTDIR()) {
 424                                 /*
 425                                  * Remove mail file
 426                                  */
 427                                 remove(file);
 428
 429                                 /*
 430                                  * Remove at jobs
 431                                  */
 432                                 if (getpwuid(uid) == NULL)
 433                                         rmat(uid);
 434
 435                                 /*
 436                                  * Remove home directory and contents
 437                                  */
 438                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 439                                         if (stat(home, &st) != -1) {
 440                                                 rm_r(home, uid);
 441                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 442                                                        a_name->val, (long) uid, home,
 443                                                        stat(home, &st) == -1 ? "" : "not completely ");
 444                                         }
 445                                 }
 446                         }
 447                         return EXIT_SUCCESS;
 448                 } else if (mode == M_PRINT)
 449                         return print_user(pwd,
 450                                           getarg(args, 'P') != NULL,
 451                                           getarg(args, '7') != NULL);
 452
 453                 /*
 454                  * The rest is edit code
 455                  */
 456                 if ((arg = getarg(args, 'l')) != NULL) {
 457                         if (strcmp(pwd->pw_name, "root") == 0)
 458                                 errx(EX_DATAERR, "can't rename `root' account");
 459                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 460                         edited = 1;
 461                 }
 462
 463                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 464                         pwd->pw_uid = (uid_t) atol(arg->val);
 465                         edited = 1;
 466                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 467                                 errx(EX_DATAERR, "can't change uid of `root' account");
 468                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 469                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 470                 }
 471
 472                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 473                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 474                         if (newgid != pwd->pw_gid) {
 475                                 edited = 1;
 476                                 pwd->pw_gid = newgid;
 477                         }
 478                 }
 479
 480                 if ((arg = getarg(args, 'p')) != NULL) {
 481                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 482                                 if (pwd->pw_change != 0) {
 483                                         pwd->pw_change = 0;
 484                                         edited = 1;
 485                                 }
 486                         }
 487                         else {
 488                                 time_t          now = time(NULL);
 489                                 time_t          expire = parse_date(now, arg->val);
 490
 491                                 if (now == expire)
 492                                         errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
 493                                 if (pwd->pw_change != expire) {
 494                                         pwd->pw_change = expire;
 495                                         edited = 1;
 496                                 }
 497                         }
 498                 }
 499
 500                 if ((arg = getarg(args, 'e')) != NULL) {
 501                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 502                                 if (pwd->pw_expire != 0) {
 503                                         pwd->pw_expire = 0;
 504                                         edited = 1;
 505                                 }
 506                         }
 507                         else {
 508                                 time_t          now = time(NULL);
 509                                 time_t          expire = parse_date(now, arg->val);
 510
 511                                 if (now == expire)
 512                                         errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
 513                                 if (pwd->pw_expire != expire) {
 514                                         pwd->pw_expire = expire;
 515                                         edited = 1;
 516                                 }
 517                         }
 518                 }
 519
 520                 if ((arg = getarg(args, 's')) != NULL) {
 521                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 522                         if (shell == NULL)
 523                                 shell = "";
 524                         if (strcmp(shell, pwd->pw_shell) != 0) {
 525                                 pwd->pw_shell = shell;
 526                                 edited = 1;
 527                         }
 528                 }
 529
 530                 if (getarg(args, 'L')) {
 531                         if (cnf->default_class == NULL)
 532                                 cnf->default_class = "";
 533                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 534                                 pwd->pw_class = cnf->default_class;
 535                                 edited = 1;
 536                         }
 537                 }
 538
 539                 if ((arg  = getarg(args, 'd')) != NULL) {
 540                         if (strcmp(pwd->pw_dir, arg->val))
 541                                 edited = 1;
 542                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 543                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 544                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 545                         } else if (!S_ISDIR(st.st_mode))
 546                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 547                 }
 548
 549                 if ((arg = getarg(args, 'w')) != NULL &&
 550                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 551                         login_cap_t *lc;
 552
 553                         lc = login_getpwclass(pwd);
 554                         if (lc == NULL ||
 555                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 556                                 warn("setting crypt(3) format");
 557                         login_close(lc);
 558                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 559                         edited = 1;
 560                 }
 561
 562         } else {
 563                 login_cap_t *lc;
 564
 565                 /*
 566                  * Add code
 567                  */
 568
 569                 if (a_name == NULL)     /* Required */
 570                         errx(EX_DATAERR, "login name required");
 571                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 572                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 573
 574                 /*
 575                  * Now, set up defaults for a new user
 576                  */
 577                 pwd = &fakeuser;
 578                 pwd->pw_name = a_name->val;
 579                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 580                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 581                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 582                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 583                 pwd->pw_expire = pw_exppolicy(cnf, args);
 584                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 585                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 586                 lc = login_getpwclass(pwd);
 587                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 588                         warn("setting crypt(3) format");
 589                 login_close(lc);
 590                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 591                 edited = 1;
 592
 593                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 594                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 595         }
 596
 597         /*
 598          * Shared add/edit code
 599          */
 600         if ((arg = getarg(args, 'c')) != NULL) {
 601                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 602                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 603                         pwd->pw_gecos = gecos;
 604                         edited = 1;
 605                 }
 606         }
 607
 608         if ((arg = getarg(args, 'h')) != NULL ||
 609             (arg = getarg(args, 'H')) != NULL) {
 610                 if (strcmp(arg->val, "-") == 0) {
 611                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 612                                 pwd->pw_passwd = "*";   /* No access */
 613                                 edited = 1;
 614                         }
 615                 } else {
 616                         int             fd = atoi(arg->val);
 617                         int             precrypt = (arg->ch == 'H');
 618                         int             b;
 619                         int             istty = isatty(fd);
 620                         struct termios  t;
 621                         login_cap_t     *lc;
 622
 623                         if (istty) {
 624                                 if (tcgetattr(fd, &t) == -1)
 625                                         istty = 0;
 626                                 else {
 627                                         struct termios  n = t;
 628
 629                                         /* Disable echo */
 630                                         n.c_lflag &= ~(ECHO);
 631                                         tcsetattr(fd, TCSANOW, &n);
 632                                         printf("%s%spassword for user %s:",
 633                                              (mode == M_UPDATE) ? "new " : "",
 634                                              precrypt ? "encrypted " : "",
 635                                              pwd->pw_name);
 636                                         fflush(stdout);
 637                                 }
 638                         }
 639                         b = read(fd, line, sizeof(line) - 1);
 640                         if (istty) {    /* Restore state */
 641                                 tcsetattr(fd, TCSANOW, &t);
 642                                 fputc('\n', stdout);
 643                                 fflush(stdout);
 644                         }
 645                         if (b < 0) {
 646                                 warn("-%c file descriptor", precrypt ? 'H' :
 647                                     'h');
 648                                 return EX_IOERR;
 649                         }
 650                         line[b] = '\0';
 651                         if ((p = strpbrk(line, "\r\n")) != NULL)
 652                                 *p = '\0';
 653                         if (!*line)
 654                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 655                         if (precrypt) {
 656                                 if (strchr(line, ':') != NULL)
 657                                         return EX_DATAERR;
 658                                 pwd->pw_passwd = line;
 659                         } else {
 660                                 lc = login_getpwclass(pwd);
 661                                 if (lc == NULL ||
 662                                     login_setcryptfmt(lc, "md5", NULL) == NULL)
 663                                         warn("setting crypt(3) format");
 664                                 login_close(lc);
 665                                 pwd->pw_passwd = pw_pwcrypt(line);
 666                         }
 667                         edited = 1;
 668                 }
 669         }
 670
 671         /*
 672          * Special case: -N only displays & exits
 673          */
 674         if (getarg(args, 'N') != NULL)
 675                 return print_user(pwd,
 676                                   getarg(args, 'P') != NULL,
 677                                   getarg(args, '7') != NULL);
 678
 679         if (mode == M_ADD) {
 680                 edited = 1;     /* Always */
 681                 rc = addpwent(pwd);
 682                 if (rc == -1) {
 683                         warnx("user '%s' already exists", pwd->pw_name);
 684                         return EX_IOERR;
 685                 } else if (rc != 0) {
 686                         warn("passwd file update");
 687                         return EX_IOERR;
 688                 }
 689                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 690                         rc = addnispwent(cnf->nispasswd, pwd);
 691                         if (rc == -1)
 692                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 693                         else
 694                                 warn("NIS passwd update");
 695                         /* NOTE: we treat NIS-only update errors as non-fatal */
 696                 }
 697         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 698                 if (edited) {   /* Only updated this if required */
 699                         rc = chgpwent(a_name->val, pwd);
 700                         if (rc == -1) {
 701                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 702                                 return EX_IOERR;
 703                         } else if (rc != 0) {
 704                                 warn("passwd file update");
 705                                 return EX_IOERR;
 706                         }
 707                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 708                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 709                                 if (rc == -1)
 710                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 711                                 else
 712                                         warn("NIS passwd update");
 713                                 /* NOTE: NIS-only update errors are not fatal */
 714                         }
 715                 }
 716         }
 717
 718         /*
 719          * Ok, user is created or changed - now edit group file
 720          */
 721
 722         if (mode == M_ADD || getarg(args, 'G') != NULL)
 723                 editgroups(pwd->pw_name, cnf->groups);
 724
 725         /* go get a current version of pwd */
 726         pwd = GETPWNAM(a_name->val);
 727         if (pwd == NULL) {
 728                 /* This will fail when we rename, so special case that */
 729                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 730                         a_name->val = arg->val;         /* update new name */
 731                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 732                 }
 733         }
 734         if (pwd == NULL)        /* can't go on without this */
 735                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 736
 737         grp = GETGRGID(pwd->pw_gid);
 738         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 739                pwd->pw_name, (long) pwd->pw_uid,
 740             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 741                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 742
 743         /*
 744          * If adding, let's touch and chown the user's mail file. This is not
 745          * strictly necessary under BSD with a 0755 maildir but it also
 746          * doesn't hurt anything to create the empty mailfile
 747          */
 748         if (mode == M_ADD) {
 749                 if (!PWALTDIR()) {
 750                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 751                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 752                                                                          * mtime */
 753                         chown(line, pwd->pw_uid, pwd->pw_gid);
 754                 }
 755         }
 756
 757         /*
 758          * Let's create and populate the user's home directory. Note
 759          * that this also `works' for editing users if -m is used, but
 760          * existing files will *not* be overwritten.
 761          */
 762         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 763                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 764                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 765                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 766         }
 767
 768
 769         /*
 770          * Finally, send mail to the new user as well, if we are asked to
 771          */
 772         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 773                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 774
 775                 if (pfp == NULL)
 776                         warn("sendmail");
 777                 else {
 778                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 779                         while (fgets(line, sizeof(line), fp) != NULL) {
 780                                 /* Do substitutions? */
 781                                 fputs(line, pfp);
 782                         }
 783                         pclose(pfp);
 784                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 785                             pwd->pw_name, (long) pwd->pw_uid);
 786                 }
 787                 fclose(fp);
 788         }
 789
 790         return EXIT_SUCCESS;
 791 }
 792
 793
 794 static          uid_t
 795 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 796 {
 797         struct passwd  *pwd;
 798         uid_t           uid = (uid_t) - 1;
 799         struct carg    *a_uid = getarg(args, 'u');
 800
 801         /*
 802          * Check the given uid, if any
 803          */
 804         if (a_uid != NULL) {
 805                 uid = (uid_t) atol(a_uid->val);
 806
 807                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 808                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 809         } else {
 810                 struct bitmap   bm;
 811
 812                 /*
 813                  * We need to allocate the next available uid under one of
 814                  * two policies a) Grab the first unused uid b) Grab the
 815                  * highest possible unused uid
 816                  */
 817                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 818                                                          * claus^H^H^H^Hheck */
 819                         cnf->min_uid = 1000;
 820                         cnf->max_uid = 32000;
 821                 }
 822                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 823
 824                 /*
 825                  * Now, let's fill the bitmap from the password file
 826                  */
 827                 SETPWENT();
 828                 while ((pwd = GETPWENT()) != NULL)
 829                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 830                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 831                 ENDPWENT();
 832
 833                 /*
 834                  * Then apply the policy, with fallback to reuse if necessary
 835                  */
 836                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 837                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 838
 839                 /*
 840                  * Another sanity check
 841                  */
 842                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 843                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 844                 bm_dealloc(&bm);
 845         }
 846         return uid;
 847 }
 848
 849
 850 static          uid_t
 851 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 852 {
 853         struct group   *grp;
 854         gid_t           gid = (uid_t) - 1;
 855         struct carg    *a_gid = getarg(args, 'g');
 856
 857         /*
 858          * If no arg given, see if default can help out
 859          */
 860         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 861                 a_gid = addarg(args, 'g', cnf->default_group);
 862
 863         /*
 864          * Check the given gid, if any
 865          */
 866         SETGRENT();
 867         if (a_gid != NULL) {
 868                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 869                         gid = (gid_t) atol(a_gid->val);
 870                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 871                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 872                 }
 873                 gid = grp->gr_gid;
 874         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 875                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 876         } else {
 877                 struct cargs    grpargs;
 878                 char            tmp[32];
 879
 880                 LIST_INIT(&grpargs);
 881                 addarg(&grpargs, 'n', nam);
 882
 883                 /*
 884                  * We need to auto-create a group with the user's name. We
 885                  * can send all the appropriate output to our sister routine
 886                  * bit first see if we can create a group with gid==uid so we
 887                  * can keep the user and group ids in sync. We purposely do
 888                  * NOT check the gid range if we can force the sync. If the
 889                  * user's name dups an existing group, then the group add
 890                  * function will happily handle that case for us and exit.
 891                  */
 892                 if (GETGRGID(prefer) == NULL) {
 893                         sprintf(tmp, "%lu", (unsigned long) prefer);
 894                         addarg(&grpargs, 'g', tmp);
 895                 }
 896                 if (getarg(args, 'N'))
 897                 {
 898                         addarg(&grpargs, 'N', NULL);
 899                         addarg(&grpargs, 'q', NULL);
 900                         gid = pw_group(cnf, M_NEXT, &grpargs);
 901                 }
 902                 else
 903                 {
 904                         pw_group(cnf, M_ADD, &grpargs);
 905                         if ((grp = GETGRNAM(nam)) != NULL)
 906                                 gid = grp->gr_gid;
 907                 }
 908                 a_gid = LIST_FIRST(&grpargs);
 909                 while (a_gid != NULL) {
 910                         struct carg    *t = LIST_NEXT(a_gid, list);
 911                         LIST_REMOVE(a_gid, list);
 912                         a_gid = t;
 913                 }
 914         }
 915         ENDGRENT();
 916         return gid;
 917 }
 918
 919
 920 static          time_t
 921 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 922 {
 923         time_t          result = 0;
 924         time_t          now = time(NULL);
 925         struct carg    *arg = getarg(args, 'p');
 926
 927         if (arg != NULL) {
 928                 if ((result = parse_date(now, arg->val)) == now)
 929                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 930         } else if (cnf->password_days > 0)
 931                 result = now + ((long) cnf->password_days * 86400L);
 932         return result;
 933 }
 934
 935
 936 static          time_t
 937 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 938 {
 939         time_t          result = 0;
 940         time_t          now = time(NULL);
 941         struct carg    *arg = getarg(args, 'e');
 942
 943         if (arg != NULL) {
 944                 if ((result = parse_date(now, arg->val)) == now)
 945                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 946         } else if (cnf->expire_days > 0)
 947                 result = now + ((long) cnf->expire_days * 86400L);
 948         return result;
 949 }
 950
 951
 952 static char    *
 953 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 954 {
 955         struct carg    *arg = getarg(args, 'd');
 956
 957         if (arg)
 958                 return arg->val;
 959         else {
 960                 static char     home[128];
 961
 962                 if (cnf->home == NULL || *cnf->home == '\0')
 963                         errx(EX_CONFIG, "no base home directory set");
 964                 sprintf(home, "%s/%s", cnf->home, user);
 965                 return home;
 966         }
 967 }
 968
 969 static char    *
 970 shell_path(char const * path, char *shells[], char *sh)
 971 {
 972         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 973                 return sh;      /* specified full path or forced none */
 974         else {
 975                 char           *p;
 976                 char            paths[_UC_MAXLINE];
 977
 978                 /*
 979                  * We need to search paths
 980                  */
 981                 strlcpy(paths, path, sizeof(paths));
 982                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 983                         int             i;
 984                         static char     shellpath[256];
 985
 986                         if (sh != NULL) {
 987                                 sprintf(shellpath, "%s/%s", p, sh);
 988                                 if (access(shellpath, X_OK) == 0)
 989                                         return shellpath;
 990                         } else
 991                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
 992                                         sprintf(shellpath, "%s/%s", p, shells[i]);
 993                                         if (access(shellpath, X_OK) == 0)
 994                                                 return shellpath;
 995                                 }
 996                 }
 997                 if (sh == NULL)
 998                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
 999                 errx(EX_CONFIG, "no default shell available or defined");
1000                 return NULL;
1001         }
1002 }
1003
1004
1005 static char    *
1006 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1007 {
1008         char           *sh = newshell;
1009         struct carg    *arg = getarg(args, 's');
1010
1011         if (newshell == NULL && arg != NULL)
1012                 sh = arg->val;
1013         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1014 }
1015
1016 #define SALTSIZE        32
1017
1018 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1019
1020 char           *
1021 pw_pwcrypt(char *password)
1022 {
1023         int             i;
1024         char            salt[SALTSIZE + 1];
1025         char            *cryptpw;
1026
1027         static char     buf[256];
1028
1029         /*
1030          * Calculate a salt value
1031          */
1032         for (i = 0; i < SALTSIZE; i++)
1033                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1034         salt[SALTSIZE] = '\0';
1035
1036         cryptpw = crypt(password, salt);
1037         if (cryptpw == NULL)
1038                 errx(EX_CONFIG, "crypt(3) failure");
1039         return strcpy(buf, cryptpw);
1040 }
1041
1042
1043 static char    *
1044 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1045 {
1046         int             i, l;
1047         char            pwbuf[32];
1048
1049         switch (cnf->default_password) {
1050         case -1:                /* Random password */
1051                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1052                 for (i = 0; i < l; i++)
1053                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1054                 pwbuf[i] = '\0';
1055
1056                 /*
1057                  * We give this information back to the user
1058                  */
1059                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1060                     getarg(args, 'N') == NULL) {
1061                         if (isatty(STDOUT_FILENO))
1062                                 printf("Password for '%s' is: ", user);
1063                         printf("%s\n", pwbuf);
1064                         fflush(stdout);
1065                 }
1066                 break;
1067
1068         case -2:                /* No password at all! */
1069                 return "";
1070
1071         case 0:         /* No login - default */
1072         default:
1073                 return "*";
1074
1075         case 1:         /* user's name */
1076                 strlcpy(pwbuf, user, sizeof(pwbuf));
1077                 break;
1078         }
1079         return pw_pwcrypt(pwbuf);
1080 }
1081
1082
1083 static int
1084 print_user(struct passwd * pwd, int pretty, int v7)
1085 {
1086         if (!pretty) {
1087                 char            buf[_UC_MAXLINE];
1088
1089                 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
1090                 fputs(buf, stdout);
1091         } else {
1092                 int             j;
1093                 char           *p;
1094                 struct group   *grp = GETGRGID(pwd->pw_gid);
1095                 char            uname[60] = "User &", office[60] = "[None]",
1096                                 wphone[60] = "[None]", hphone[60] = "[None]";
1097                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1098                 struct tm *    tptr;
1099
1100                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1101                         strlcpy(uname, p, sizeof(uname));
1102                         if ((p = strtok(NULL, ",")) != NULL) {
1103                                 strlcpy(office, p, sizeof(office));
1104                                 if ((p = strtok(NULL, ",")) != NULL) {
1105                                         strlcpy(wphone, p, sizeof(wphone));
1106                                         if ((p = strtok(NULL, "")) != NULL) {
1107                                                 strlcpy(hphone, p,
1108                                                     sizeof(hphone));
1109                                         }
1110                                 }
1111                         }
1112                 }
1113                 /*
1114                  * Handle '&' in gecos field
1115                  */
1116                 if ((p = strchr(uname, '&')) != NULL) {
1117                         int             l = strlen(pwd->pw_name);
1118                         int             m = strlen(p);
1119
1120                         memmove(p + l, p + 1, m);
1121                         memmove(p, pwd->pw_name, l);
1122                         *p = (char) toupper((unsigned char)*p);
1123                 }
1124                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1125                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1126                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1127                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1128                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1129                        " Full Name: %s\n"
1130                        "      Home: %-26.26s      Class: %s\n"
1131                        "     Shell: %-26.26s     Office: %s\n"
1132                        "Work Phone: %-26.26s Home Phone: %s\n"
1133                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1134                        pwd->pw_name, (long) pwd->pw_uid,
1135                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1136                        uname, pwd->pw_dir, pwd->pw_class,
1137                        pwd->pw_shell, office, wphone, hphone,
1138                        acexpire, pwexpire);
1139                 SETGRENT();
1140                 j = 0;
1141                 while ((grp=GETGRENT()) != NULL)
1142                 {
1143                         int     i = 0;
1144                         while (grp->gr_mem[i] != NULL)
1145                         {
1146                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1147                                 {
1148                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1149                                         break;
1150                                 }
1151                                 ++i;
1152                         }
1153                 }
1154                 ENDGRENT();
1155                 printf("%s", j ? "\n" : "");
1156         }
1157         return EXIT_SUCCESS;
1158 }
1159
1160 char    *
1161 pw_checkname(u_char *name, int gecos)
1162 {
1163         char showch[8];
1164         u_char const *badchars, *ch, *showtype;
1165         int reject;
1166
1167         ch = name;
1168         reject = 0;
1169         if (gecos) {
1170                 /* See if the name is valid as a gecos (comment) field. */
1171                 badchars = ":!@";
1172                 showtype = "gecos field";
1173         } else {
1174                 /* See if the name is valid as a userid or group. */
1175                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1176                 showtype = "userid/group name";
1177                 /* Userids and groups can not have a leading '-'. */
1178                 if (*ch == '-')
1179                         reject = 1;
1180         }
1181         if (!reject) {
1182                 while (*ch) {
1183                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1184                             *ch == 127) {
1185                                 reject = 1;
1186                                 break;
1187                         }
1188                         /* 8-bit characters are only allowed in GECOS fields */
1189                         if (!gecos && (*ch & 0x80)) {
1190                                 reject = 1;
1191                                 break;
1192                         }
1193                         ch++;
1194                 }
1195         }
1196         /*
1197          * A `$' is allowed as the final character for userids and groups,
1198          * mainly for the benefit of samba.
1199          */
1200         if (reject && !gecos) {
1201                 if (*ch == '$' && *(ch + 1) == '\0') {
1202                         reject = 0;
1203                         ch++;
1204                 }
1205         }
1206         if (reject) {
1207                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1208                     ? "`%c'" : "0x%02x", *ch);
1209                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
1210                     showch, (ch - name), showtype);
1211         }
1212         if (!gecos && (ch - name) > LOGNAMESIZE)
1213                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1214                     LOGNAMESIZE);
1215         return (char *)name;
1216 }
1217
1218
1219 static void
1220 rmat(uid_t uid)
1221 {
1222         DIR            *d = opendir("/var/at/jobs");
1223
1224         if (d != NULL) {
1225                 struct dirent  *e;
1226
1227                 while ((e = readdir(d)) != NULL) {
1228                         struct stat     st;
1229
1230                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1231                             stat(e->d_name, &st) == 0 &&
1232                             !S_ISDIR(st.st_mode) &&
1233                             st.st_uid == uid) {
1234                                 char            tmp[MAXPATHLEN];
1235
1236                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1237                                 system(tmp);
1238                         }
1239                 }
1240                 closedir(d);
1241         }
1242 }
1243
1244 static void
1245 rmopie(char const * name)
1246 {
1247         static const char etcopie[] = "/etc/opiekeys";
1248         FILE   *fp = fopen(etcopie, "r+");
1249
1250         if (fp != NULL) {
1251                 char    tmp[1024];
1252                 off_t   atofs = 0;
1253                 int     length = strlen(name);
1254
1255                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1256                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1257                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1258                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1259                                 }
1260                                 break;
1261                         }
1262                         atofs = ftell(fp);
1263                 }
1264                 /*
1265                  * If we got an error of any sort, don't update!
1266                  */
1267                 fclose(fp);
1268         }
1269 }
1270