usr.sbin/pw/pw_user.c

   1 /*-
   2  * Copyright (C) 1996
   3  *      David L. Nugent.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27
  28 #ifndef lint
  29 static const char rcsid[] =
  30   "$FreeBSD$";
  31 #endif /* not lint */
  32
  33 #include <ctype.h>
  34 #include <err.h>
  35 #include <fcntl.h>
  36 #include <sys/param.h>
  37 #include <dirent.h>
  38 #include <paths.h>
  39 #include <termios.h>
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/resource.h>
  43 #include <unistd.h>
  44 #include <login_cap.h>
  45 #include "pw.h"
  46 #include "bitmap.h"
  47
  48 #define LOGNAMESIZE (MAXLOGNAME-1)
  49
  50 static          char locked_str[] = "*LOCKED*";
  51
  52 static int      print_user(struct passwd * pwd, int pretty, int v7);
  53 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  54 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  55 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  56 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  57 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  58 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  59 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  60 static char    *shell_path(char const * path, char *shells[], char *sh);
  61 static void     rmat(uid_t uid);
  62 static void     rmopie(char const * name);
  63
  64 /*-
  65  * -C config      configuration file
  66  * -q             quiet operation
  67  * -n name        login name
  68  * -u uid         user id
  69  * -c comment     user name/comment
  70  * -d directory   home directory
  71  * -e date        account expiry date
  72  * -p date        password expiry date
  73  * -g grp         primary group
  74  * -G grp1,grp2   additional groups
  75  * -m [ -k dir ]  create and set up home
  76  * -s shell       name of login shell
  77  * -o             duplicate uid ok
  78  * -L class       user class
  79  * -l name        new login name
  80  * -h fd          password filehandle
  81  * -H fd          encrypted password filehandle
  82  * -F             force print or add
  83  *   Setting defaults:
  84  * -D             set user defaults
  85  * -b dir         default home root dir
  86  * -e period      default expiry period
  87  * -p period      default password change period
  88  * -g group       default group
  89  * -G             grp1,grp2.. default additional groups
  90  * -L class       default login class
  91  * -k dir         default home skeleton
  92  * -s shell       default shell
  93  * -w method      default password method
  94  */
  95
  96 int
  97 pw_user(struct userconf * cnf, int mode, struct cargs * args)
  98 {
  99         int             rc, edited = 0;
 100         char           *p = NULL;
 101         char                                     *passtmp;
 102         struct carg    *a_name;
 103         struct carg    *a_uid;
 104         struct carg    *arg;
 105         struct passwd  *pwd = NULL;
 106         struct group   *grp;
 107         struct stat     st;
 108         char            line[_PASSWORD_LEN+1];
 109         FILE           *fp;
 110         char *dmode_c;
 111         void *set = NULL;
 112
 113         static struct passwd fakeuser =
 114         {
 115                 NULL,
 116                 "*",
 117                 -1,
 118                 -1,
 119                 0,
 120                 "",
 121                 "User &",
 122                 "/nonexistent",
 123                 "/bin/sh",
 124                 0
 125 #if defined(__FreeBSD__)
 126                 ,0
 127 #endif
 128         };
 129
 130
 131         /*
 132          * With M_NEXT, we only need to return the
 133          * next uid to stdout
 134          */
 135         if (mode == M_NEXT)
 136         {
 137                 uid_t next = pw_uidpolicy(cnf, args);
 138                 if (getarg(args, 'q'))
 139                         return next;
 140                 printf("%ld:", (long)next);
 141                 pw_group(cnf, mode, args);
 142                 return EXIT_SUCCESS;
 143         }
 144
 145         /*
 146          * We can do all of the common legwork here
 147          */
 148
 149         if ((arg = getarg(args, 'b')) != NULL) {
 150                 cnf->home = arg->val;
 151         }
 152
 153         if ((arg = getarg(args, 'M')) != NULL) {
 154                 dmode_c = arg->val;
 155                 if ((set = setmode(dmode_c)) == NULL)
 156                         errx(EX_DATAERR, "invalid directory creation mode '%s'",
 157                             dmode_c);
 158                 cnf->homemode = getmode(set, _DEF_DIRMODE);
 159                 free(set);
 160         }
 161
 162         /*
 163          * If we'll need to use it or we're updating it,
 164          * then create the base home directory if necessary
 165          */
 166         if (arg != NULL || getarg(args, 'm') != NULL) {
 167                 int     l = strlen(cnf->home);
 168
 169                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 170                         cnf->home[--l] = '\0';
 171
 172                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 173                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 174
 175                 if (stat(cnf->home, &st) == -1) {
 176                         char    dbuf[MAXPATHLEN];
 177
 178                         /*
 179                          * This is a kludge especially for Joerg :)
 180                          * If the home directory would be created in the root partition, then
 181                          * we really create it under /usr which is likely to have more space.
 182                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 183                          */
 184                         if (strchr(cnf->home+1, '/') == NULL) {
 185                                 strcpy(dbuf, "/usr");
 186                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 187                                 if (mkdir(dbuf, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 188                                         chown(dbuf, 0, 0);
 189                                         /*
 190                                          * Skip first "/" and create symlink:
 191                                          * /home -> usr/home
 192                                          */
 193                                         symlink(dbuf+1, cnf->home);
 194                                 }
 195                                 /* If this falls, fall back to old method */
 196                         }
 197                         strlcpy(dbuf, cnf->home, sizeof(dbuf));
 198                         p = dbuf;
 199                         if (stat(dbuf, &st) == -1) {
 200                                 while ((p = strchr(++p, '/')) != NULL) {
 201                                         *p = '\0';
 202                                         if (stat(dbuf, &st) == -1) {
 203                                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1)
 204                                                         goto direrr;
 205                                                 chown(dbuf, 0, 0);
 206                                         } else if (!S_ISDIR(st.st_mode))
 207                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 208                                         *p = '/';
 209                                 }
 210                         }
 211                         if (stat(dbuf, &st) == -1) {
 212                                 if (mkdir(dbuf, _DEF_DIRMODE) == -1) {
 213                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 214                                 }
 215                                 chown(dbuf, 0, 0);
 216                         }
 217                 } else if (!S_ISDIR(st.st_mode))
 218                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 219         }
 220
 221         if ((arg = getarg(args, 'e')) != NULL)
 222                 cnf->expire_days = atoi(arg->val);
 223
 224         if ((arg = getarg(args, 'y')) != NULL)
 225                 cnf->nispasswd = arg->val;
 226
 227         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 228                 cnf->password_days = atoi(arg->val);
 229
 230         if ((arg = getarg(args, 'g')) != NULL) {
 231                 if (!*(p = arg->val))   /* Handle empty group list specially */
 232                         cnf->default_group = "";
 233                 else {
 234                         if ((grp = GETGRNAM(p)) == NULL) {
 235                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 236                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 237                         }
 238                         cnf->default_group = newstr(grp->gr_name);
 239                 }
 240         }
 241         if ((arg = getarg(args, 'L')) != NULL)
 242                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 243
 244         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 245                 int i = 0;
 246
 247                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 248                         if ((grp = GETGRNAM(p)) == NULL) {
 249                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 250                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 251                         }
 252                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 253                                 cnf->groups[i++] = newstr(grp->gr_name);
 254                 }
 255                 while (i < cnf->numgroups)
 256                         cnf->groups[i++] = NULL;
 257         }
 258
 259         if ((arg = getarg(args, 'k')) != NULL) {
 260                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 261                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 262         }
 263
 264         if ((arg = getarg(args, 's')) != NULL)
 265                 cnf->shell_default = arg->val;
 266
 267         if ((arg = getarg(args, 'w')) != NULL)
 268                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 269         if (mode == M_ADD && getarg(args, 'D')) {
 270                 if (getarg(args, 'n') != NULL)
 271                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 272                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 273                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 274                                 cnf->min_uid = 1000;
 275                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 276                                 cnf->max_uid = 32000;
 277                 }
 278                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 279                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 280                                 cnf->min_gid = 1000;
 281                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 282                                 cnf->max_gid = 32000;
 283                 }
 284
 285                 arg = getarg(args, 'C');
 286                 if (write_userconfig(arg ? arg->val : NULL))
 287                         return EXIT_SUCCESS;
 288                 warn("config update");
 289                 return EX_IOERR;
 290         }
 291
 292         if (mode == M_PRINT && getarg(args, 'a')) {
 293                 int             pretty = getarg(args, 'P') != NULL;
 294                 int             v7 = getarg(args, '7') != NULL;
 295
 296                 SETPWENT();
 297                 while ((pwd = GETPWENT()) != NULL)
 298                         print_user(pwd, pretty, v7);
 299                 ENDPWENT();
 300                 return EXIT_SUCCESS;
 301         }
 302
 303         if ((a_name = getarg(args, 'n')) != NULL)
 304                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 305         a_uid = getarg(args, 'u');
 306
 307         if (a_uid == NULL) {
 308                 if (a_name == NULL)
 309                         errx(EX_DATAERR, "user name or id required");
 310
 311                 /*
 312                  * Determine whether 'n' switch is name or uid - we don't
 313                  * really don't really care which we have, but we need to
 314                  * know.
 315                  */
 316                 if (mode != M_ADD && pwd == NULL
 317                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 318                     && atoi(a_name->val) > 0) { /* Assume uid */
 319                         (a_uid = a_name)->ch = 'u';
 320                         a_name = NULL;
 321                 }
 322         }
 323
 324         /*
 325          * Update, delete & print require that the user exists
 326          */
 327         if (mode == M_UPDATE || mode == M_DELETE ||
 328             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 329
 330                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 331                         pwd = GETPWUID(atoi(a_uid->val));
 332
 333                 if (pwd == NULL) {
 334                         if (mode == M_PRINT && getarg(args, 'F')) {
 335                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 336                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 337                                 return print_user(&fakeuser,
 338                                                   getarg(args, 'P') != NULL,
 339                                                   getarg(args, '7') != NULL);
 340                         }
 341                         if (a_name == NULL)
 342                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 343                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 344                 }
 345
 346                 if (a_name == NULL)     /* May be needed later */
 347                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 348
 349                 /*
 350                  * The M_LOCK and M_UNLOCK functions simply add or remove
 351                  * a "*LOCKED*" prefix from in front of the password to
 352                  * prevent it decoding correctly, and therefore prevents
 353                  * access. Of course, this only prevents access via
 354                  * password authentication (not ssh, kerberos or any
 355                  * other method that does not use the UNIX password) but
 356                  * that is a known limitation.
 357                  */
 358
 359                 if (mode == M_LOCK) {
 360                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 361                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 362                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 363                         if (passtmp == NULL)    /* disaster */
 364                                 errx(EX_UNAVAILABLE, "out of memory");
 365                         strcpy(passtmp, locked_str);
 366                         strcat(passtmp, pwd->pw_passwd);
 367                         pwd->pw_passwd = passtmp;
 368                         edited = 1;
 369                 } else if (mode == M_UNLOCK) {
 370                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 371                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 372                         pwd->pw_passwd += sizeof(locked_str)-1;
 373                         edited = 1;
 374                 } else if (mode == M_DELETE) {
 375                         /*
 376                          * Handle deletions now
 377                          */
 378                         char            file[MAXPATHLEN];
 379                         char            home[MAXPATHLEN];
 380                         uid_t           uid = pwd->pw_uid;
 381
 382                         if (strcmp(pwd->pw_name, "root") == 0)
 383                                 errx(EX_DATAERR, "cannot remove user 'root'");
 384
 385                         if (!PWALTDIR()) {
 386                                 /*
 387                                  * Remove opie record from /etc/opiekeys
 388                                  */
 389
 390                                 rmopie(pwd->pw_name);
 391
 392                                 /*
 393                                  * Remove crontabs
 394                                  */
 395                                 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
 396                                 if (access(file, F_OK) == 0) {
 397                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 398                                         system(file);
 399                                 }
 400                         }
 401                         /*
 402                          * Save these for later, since contents of pwd may be
 403                          * invalidated by deletion
 404                          */
 405                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 406                         strlcpy(home, pwd->pw_dir, sizeof(home));
 407
 408                         rc = delpwent(pwd);
 409                         if (rc == -1)
 410                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 411                         else if (rc != 0) {
 412                                 warn("passwd update");
 413                                 return EX_IOERR;
 414                         }
 415
 416                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 417                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 418                                 if (rc == -1)
 419                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 420                                 else if (rc != 0)
 421                                         warn("WARNING: NIS passwd update");
 422                                 /* non-fatal */
 423                         }
 424
 425                         editgroups(a_name->val, NULL);
 426
 427                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 428
 429                         if (!PWALTDIR()) {
 430                                 /*
 431                                  * Remove mail file
 432                                  */
 433                                 remove(file);
 434
 435                                 /*
 436                                  * Remove at jobs
 437                                  */
 438                                 if (getpwuid(uid) == NULL)
 439                                         rmat(uid);
 440
 441                                 /*
 442                                  * Remove home directory and contents
 443                                  */
 444                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 445                                         if (stat(home, &st) != -1) {
 446                                                 rm_r(home, uid);
 447                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 448                                                        a_name->val, (long) uid, home,
 449                                                        stat(home, &st) == -1 ? "" : "not completely ");
 450                                         }
 451                                 }
 452                         }
 453                         return EXIT_SUCCESS;
 454                 } else if (mode == M_PRINT)
 455                         return print_user(pwd,
 456                                           getarg(args, 'P') != NULL,
 457                                           getarg(args, '7') != NULL);
 458
 459                 /*
 460                  * The rest is edit code
 461                  */
 462                 if ((arg = getarg(args, 'l')) != NULL) {
 463                         if (strcmp(pwd->pw_name, "root") == 0)
 464                                 errx(EX_DATAERR, "can't rename `root' account");
 465                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 466                         edited = 1;
 467                 }
 468
 469                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 470                         pwd->pw_uid = (uid_t) atol(arg->val);
 471                         edited = 1;
 472                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 473                                 errx(EX_DATAERR, "can't change uid of `root' account");
 474                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 475                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 476                 }
 477
 478                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 479                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 480                         if (newgid != pwd->pw_gid) {
 481                                 edited = 1;
 482                                 pwd->pw_gid = newgid;
 483                         }
 484                 }
 485
 486                 if ((arg = getarg(args, 'p')) != NULL) {
 487                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 488                                 if (pwd->pw_change != 0) {
 489                                         pwd->pw_change = 0;
 490                                         edited = 1;
 491                                 }
 492                         }
 493                         else {
 494                                 time_t          now = time(NULL);
 495                                 time_t          expire = parse_date(now, arg->val);
 496
 497                                 if (now == expire)
 498                                         errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
 499                                 if (pwd->pw_change != expire) {
 500                                         pwd->pw_change = expire;
 501                                         edited = 1;
 502                                 }
 503                         }
 504                 }
 505
 506                 if ((arg = getarg(args, 'e')) != NULL) {
 507                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 508                                 if (pwd->pw_expire != 0) {
 509                                         pwd->pw_expire = 0;
 510                                         edited = 1;
 511                                 }
 512                         }
 513                         else {
 514                                 time_t          now = time(NULL);
 515                                 time_t          expire = parse_date(now, arg->val);
 516
 517                                 if (now == expire)
 518                                         errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
 519                                 if (pwd->pw_expire != expire) {
 520                                         pwd->pw_expire = expire;
 521                                         edited = 1;
 522                                 }
 523                         }
 524                 }
 525
 526                 if ((arg = getarg(args, 's')) != NULL) {
 527                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 528                         if (shell == NULL)
 529                                 shell = "";
 530                         if (strcmp(shell, pwd->pw_shell) != 0) {
 531                                 pwd->pw_shell = shell;
 532                                 edited = 1;
 533                         }
 534                 }
 535
 536                 if (getarg(args, 'L')) {
 537                         if (cnf->default_class == NULL)
 538                                 cnf->default_class = "";
 539                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 540                                 pwd->pw_class = cnf->default_class;
 541                                 edited = 1;
 542                         }
 543                 }
 544
 545                 if ((arg  = getarg(args, 'd')) != NULL) {
 546                         if (strcmp(pwd->pw_dir, arg->val))
 547                                 edited = 1;
 548                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 549                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 550                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 551                         } else if (!S_ISDIR(st.st_mode))
 552                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 553                 }
 554
 555                 if ((arg = getarg(args, 'w')) != NULL &&
 556                     getarg(args, 'h') == NULL && getarg(args, 'H') == NULL) {
 557                         login_cap_t *lc;
 558
 559                         lc = login_getpwclass(pwd);
 560                         if (lc == NULL ||
 561                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 562                                 warn("setting crypt(3) format");
 563                         login_close(lc);
 564                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 565                         edited = 1;
 566                 }
 567
 568         } else {
 569                 login_cap_t *lc;
 570
 571                 /*
 572                  * Add code
 573                  */
 574
 575                 if (a_name == NULL)     /* Required */
 576                         errx(EX_DATAERR, "login name required");
 577                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 578                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 579
 580                 /*
 581                  * Now, set up defaults for a new user
 582                  */
 583                 pwd = &fakeuser;
 584                 pwd->pw_name = a_name->val;
 585                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 586                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 587                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 588                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 589                 pwd->pw_expire = pw_exppolicy(cnf, args);
 590                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 591                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 592                 lc = login_getpwclass(pwd);
 593                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 594                         warn("setting crypt(3) format");
 595                 login_close(lc);
 596                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 597                 edited = 1;
 598
 599                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 600                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 601         }
 602
 603         /*
 604          * Shared add/edit code
 605          */
 606         if ((arg = getarg(args, 'c')) != NULL) {
 607                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 608                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 609                         pwd->pw_gecos = gecos;
 610                         edited = 1;
 611                 }
 612         }
 613
 614         if ((arg = getarg(args, 'h')) != NULL ||
 615             (arg = getarg(args, 'H')) != NULL) {
 616                 if (strcmp(arg->val, "-") == 0) {
 617                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 618                                 pwd->pw_passwd = "*";   /* No access */
 619                                 edited = 1;
 620                         }
 621                 } else {
 622                         int             fd = atoi(arg->val);
 623                         int             precrypt = (arg->ch == 'H');
 624                         int             b;
 625                         int             istty = isatty(fd);
 626                         struct termios  t;
 627                         login_cap_t     *lc;
 628
 629                         if (istty) {
 630                                 if (tcgetattr(fd, &t) == -1)
 631                                         istty = 0;
 632                                 else {
 633                                         struct termios  n = t;
 634
 635                                         /* Disable echo */
 636                                         n.c_lflag &= ~(ECHO);
 637                                         tcsetattr(fd, TCSANOW, &n);
 638                                         printf("%s%spassword for user %s:",
 639                                              (mode == M_UPDATE) ? "new " : "",
 640                                              precrypt ? "encrypted " : "",
 641                                              pwd->pw_name);
 642                                         fflush(stdout);
 643                                 }
 644                         }
 645                         b = read(fd, line, sizeof(line) - 1);
 646                         if (istty) {    /* Restore state */
 647                                 tcsetattr(fd, TCSANOW, &t);
 648                                 fputc('\n', stdout);
 649                                 fflush(stdout);
 650                         }
 651                         if (b < 0) {
 652                                 warn("-%c file descriptor", precrypt ? 'H' :
 653                                     'h');
 654                                 return EX_IOERR;
 655                         }
 656                         line[b] = '\0';
 657                         if ((p = strpbrk(line, "\r\n")) != NULL)
 658                                 *p = '\0';
 659                         if (!*line)
 660                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 661                         if (precrypt) {
 662                                 if (strchr(line, ':') != NULL)
 663                                         return EX_DATAERR;
 664                                 pwd->pw_passwd = line;
 665                         } else {
 666                                 lc = login_getpwclass(pwd);
 667                                 if (lc == NULL ||
 668                                     login_setcryptfmt(lc, "md5", NULL) == NULL)
 669                                         warn("setting crypt(3) format");
 670                                 login_close(lc);
 671                                 pwd->pw_passwd = pw_pwcrypt(line);
 672                         }
 673                         edited = 1;
 674                 }
 675         }
 676
 677         /*
 678          * Special case: -N only displays & exits
 679          */
 680         if (getarg(args, 'N') != NULL)
 681                 return print_user(pwd,
 682                                   getarg(args, 'P') != NULL,
 683                                   getarg(args, '7') != NULL);
 684
 685         if (mode == M_ADD) {
 686                 edited = 1;     /* Always */
 687                 rc = addpwent(pwd);
 688                 if (rc == -1) {
 689                         warnx("user '%s' already exists", pwd->pw_name);
 690                         return EX_IOERR;
 691                 } else if (rc != 0) {
 692                         warn("passwd file update");
 693                         return EX_IOERR;
 694                 }
 695                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 696                         rc = addnispwent(cnf->nispasswd, pwd);
 697                         if (rc == -1)
 698                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 699                         else
 700                                 warn("NIS passwd update");
 701                         /* NOTE: we treat NIS-only update errors as non-fatal */
 702                 }
 703         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 704                 if (edited) {   /* Only updated this if required */
 705                         rc = chgpwent(a_name->val, pwd);
 706                         if (rc == -1) {
 707                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 708                                 return EX_IOERR;
 709                         } else if (rc != 0) {
 710                                 warn("passwd file update");
 711                                 return EX_IOERR;
 712                         }
 713                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 714                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 715                                 if (rc == -1)
 716                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 717                                 else
 718                                         warn("NIS passwd update");
 719                                 /* NOTE: NIS-only update errors are not fatal */
 720                         }
 721                 }
 722         }
 723
 724         /*
 725          * Ok, user is created or changed - now edit group file
 726          */
 727
 728         if (mode == M_ADD || getarg(args, 'G') != NULL)
 729                 editgroups(pwd->pw_name, cnf->groups);
 730
 731         /* go get a current version of pwd */
 732         pwd = GETPWNAM(a_name->val);
 733         if (pwd == NULL) {
 734                 /* This will fail when we rename, so special case that */
 735                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 736                         a_name->val = arg->val;         /* update new name */
 737                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 738                 }
 739         }
 740         if (pwd == NULL)        /* can't go on without this */
 741                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 742
 743         grp = GETGRGID(pwd->pw_gid);
 744         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 745                pwd->pw_name, (long) pwd->pw_uid,
 746             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 747                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 748
 749         /*
 750          * If adding, let's touch and chown the user's mail file. This is not
 751          * strictly necessary under BSD with a 0755 maildir but it also
 752          * doesn't hurt anything to create the empty mailfile
 753          */
 754         if (mode == M_ADD) {
 755                 if (!PWALTDIR()) {
 756                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 757                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 758                                                                          * mtime */
 759                         chown(line, pwd->pw_uid, pwd->pw_gid);
 760                 }
 761         }
 762
 763         /*
 764          * Let's create and populate the user's home directory. Note
 765          * that this also `works' for editing users if -m is used, but
 766          * existing files will *not* be overwritten.
 767          */
 768         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 769                 copymkdir(pwd->pw_dir, cnf->dotdir, cnf->homemode, pwd->pw_uid, pwd->pw_gid);
 770                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 771                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 772         }
 773
 774
 775         /*
 776          * Finally, send mail to the new user as well, if we are asked to
 777          */
 778         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 779                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 780
 781                 if (pfp == NULL)
 782                         warn("sendmail");
 783                 else {
 784                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 785                         while (fgets(line, sizeof(line), fp) != NULL) {
 786                                 /* Do substitutions? */
 787                                 fputs(line, pfp);
 788                         }
 789                         pclose(pfp);
 790                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 791                             pwd->pw_name, (long) pwd->pw_uid);
 792                 }
 793                 fclose(fp);
 794         }
 795
 796         return EXIT_SUCCESS;
 797 }
 798
 799
 800 static          uid_t
 801 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 802 {
 803         struct passwd  *pwd;
 804         uid_t           uid = (uid_t) - 1;
 805         struct carg    *a_uid = getarg(args, 'u');
 806
 807         /*
 808          * Check the given uid, if any
 809          */
 810         if (a_uid != NULL) {
 811                 uid = (uid_t) atol(a_uid->val);
 812
 813                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 814                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 815         } else {
 816                 struct bitmap   bm;
 817
 818                 /*
 819                  * We need to allocate the next available uid under one of
 820                  * two policies a) Grab the first unused uid b) Grab the
 821                  * highest possible unused uid
 822                  */
 823                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 824                                                          * claus^H^H^H^Hheck */
 825                         cnf->min_uid = 1000;
 826                         cnf->max_uid = 32000;
 827                 }
 828                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 829
 830                 /*
 831                  * Now, let's fill the bitmap from the password file
 832                  */
 833                 SETPWENT();
 834                 while ((pwd = GETPWENT()) != NULL)
 835                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 836                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 837                 ENDPWENT();
 838
 839                 /*
 840                  * Then apply the policy, with fallback to reuse if necessary
 841                  */
 842                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 843                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 844
 845                 /*
 846                  * Another sanity check
 847                  */
 848                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 849                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 850                 bm_dealloc(&bm);
 851         }
 852         return uid;
 853 }
 854
 855
 856 static          uid_t
 857 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 858 {
 859         struct group   *grp;
 860         gid_t           gid = (uid_t) - 1;
 861         struct carg    *a_gid = getarg(args, 'g');
 862
 863         /*
 864          * If no arg given, see if default can help out
 865          */
 866         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 867                 a_gid = addarg(args, 'g', cnf->default_group);
 868
 869         /*
 870          * Check the given gid, if any
 871          */
 872         SETGRENT();
 873         if (a_gid != NULL) {
 874                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 875                         gid = (gid_t) atol(a_gid->val);
 876                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 877                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 878                 }
 879                 gid = grp->gr_gid;
 880         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 881                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 882         } else {
 883                 struct cargs    grpargs;
 884                 char            tmp[32];
 885
 886                 LIST_INIT(&grpargs);
 887                 addarg(&grpargs, 'n', nam);
 888
 889                 /*
 890                  * We need to auto-create a group with the user's name. We
 891                  * can send all the appropriate output to our sister routine
 892                  * bit first see if we can create a group with gid==uid so we
 893                  * can keep the user and group ids in sync. We purposely do
 894                  * NOT check the gid range if we can force the sync. If the
 895                  * user's name dups an existing group, then the group add
 896                  * function will happily handle that case for us and exit.
 897                  */
 898                 if (GETGRGID(prefer) == NULL) {
 899                         sprintf(tmp, "%lu", (unsigned long) prefer);
 900                         addarg(&grpargs, 'g', tmp);
 901                 }
 902                 if (getarg(args, 'N'))
 903                 {
 904                         addarg(&grpargs, 'N', NULL);
 905                         addarg(&grpargs, 'q', NULL);
 906                         gid = pw_group(cnf, M_NEXT, &grpargs);
 907                 }
 908                 else
 909                 {
 910                         pw_group(cnf, M_ADD, &grpargs);
 911                         if ((grp = GETGRNAM(nam)) != NULL)
 912                                 gid = grp->gr_gid;
 913                 }
 914                 a_gid = LIST_FIRST(&grpargs);
 915                 while (a_gid != NULL) {
 916                         struct carg    *t = LIST_NEXT(a_gid, list);
 917                         LIST_REMOVE(a_gid, list);
 918                         a_gid = t;
 919                 }
 920         }
 921         ENDGRENT();
 922         return gid;
 923 }
 924
 925
 926 static          time_t
 927 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 928 {
 929         time_t          result = 0;
 930         time_t          now = time(NULL);
 931         struct carg    *arg = getarg(args, 'p');
 932
 933         if (arg != NULL) {
 934                 if ((result = parse_date(now, arg->val)) == now)
 935                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 936         } else if (cnf->password_days > 0)
 937                 result = now + ((long) cnf->password_days * 86400L);
 938         return result;
 939 }
 940
 941
 942 static          time_t
 943 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 944 {
 945         time_t          result = 0;
 946         time_t          now = time(NULL);
 947         struct carg    *arg = getarg(args, 'e');
 948
 949         if (arg != NULL) {
 950                 if ((result = parse_date(now, arg->val)) == now)
 951                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 952         } else if (cnf->expire_days > 0)
 953                 result = now + ((long) cnf->expire_days * 86400L);
 954         return result;
 955 }
 956
 957
 958 static char    *
 959 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 960 {
 961         struct carg    *arg = getarg(args, 'd');
 962
 963         if (arg)
 964                 return arg->val;
 965         else {
 966                 static char     home[128];
 967
 968                 if (cnf->home == NULL || *cnf->home == '\0')
 969                         errx(EX_CONFIG, "no base home directory set");
 970                 sprintf(home, "%s/%s", cnf->home, user);
 971                 return home;
 972         }
 973 }
 974
 975 static char    *
 976 shell_path(char const * path, char *shells[], char *sh)
 977 {
 978         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 979                 return sh;      /* specified full path or forced none */
 980         else {
 981                 char           *p;
 982                 char            paths[_UC_MAXLINE];
 983
 984                 /*
 985                  * We need to search paths
 986                  */
 987                 strlcpy(paths, path, sizeof(paths));
 988                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 989                         int             i;
 990                         static char     shellpath[256];
 991
 992                         if (sh != NULL) {
 993                                 sprintf(shellpath, "%s/%s", p, sh);
 994                                 if (access(shellpath, X_OK) == 0)
 995                                         return shellpath;
 996                         } else
 997                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
 998                                         sprintf(shellpath, "%s/%s", p, shells[i]);
 999                                         if (access(shellpath, X_OK) == 0)
1000                                                 return shellpath;
1001                                 }
1002                 }
1003                 if (sh == NULL)
1004                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
1005                 errx(EX_CONFIG, "no default shell available or defined");
1006                 return NULL;
1007         }
1008 }
1009
1010
1011 static char    *
1012 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
1013 {
1014         char           *sh = newshell;
1015         struct carg    *arg = getarg(args, 's');
1016
1017         if (newshell == NULL && arg != NULL)
1018                 sh = arg->val;
1019         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1020 }
1021
1022 #define SALTSIZE        32
1023
1024 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
1025
1026 char           *
1027 pw_pwcrypt(char *password)
1028 {
1029         int             i;
1030         char            salt[SALTSIZE + 1];
1031
1032         static char     buf[256];
1033
1034         /*
1035          * Calculate a salt value
1036          */
1037         for (i = 0; i < SALTSIZE; i++)
1038                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
1039         salt[SALTSIZE] = '\0';
1040
1041         return strcpy(buf, crypt(password, salt));
1042 }
1043
1044
1045 static char    *
1046 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1047 {
1048         int             i, l;
1049         char            pwbuf[32];
1050
1051         switch (cnf->default_password) {
1052         case -1:                /* Random password */
1053                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1054                 for (i = 0; i < l; i++)
1055                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
1056                 pwbuf[i] = '\0';
1057
1058                 /*
1059                  * We give this information back to the user
1060                  */
1061                 if (getarg(args, 'h') == NULL && getarg(args, 'H') == NULL &&
1062                     getarg(args, 'N') == NULL) {
1063                         if (isatty(STDOUT_FILENO))
1064                                 printf("Password for '%s' is: ", user);
1065                         printf("%s\n", pwbuf);
1066                         fflush(stdout);
1067                 }
1068                 break;
1069
1070         case -2:                /* No password at all! */
1071                 return "";
1072
1073         case 0:         /* No login - default */
1074         default:
1075                 return "*";
1076
1077         case 1:         /* user's name */
1078                 strlcpy(pwbuf, user, sizeof(pwbuf));
1079                 break;
1080         }
1081         return pw_pwcrypt(pwbuf);
1082 }
1083
1084
1085 static int
1086 print_user(struct passwd * pwd, int pretty, int v7)
1087 {
1088         if (!pretty) {
1089                 char            buf[_UC_MAXLINE];
1090
1091                 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
1092                 fputs(buf, stdout);
1093         } else {
1094                 int             j;
1095                 char           *p;
1096                 struct group   *grp = GETGRGID(pwd->pw_gid);
1097                 char            uname[60] = "User &", office[60] = "[None]",
1098                                 wphone[60] = "[None]", hphone[60] = "[None]";
1099                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1100                 struct tm *    tptr;
1101
1102                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1103                         strlcpy(uname, p, sizeof(uname));
1104                         if ((p = strtok(NULL, ",")) != NULL) {
1105                                 strlcpy(office, p, sizeof(office));
1106                                 if ((p = strtok(NULL, ",")) != NULL) {
1107                                         strlcpy(wphone, p, sizeof(wphone));
1108                                         if ((p = strtok(NULL, "")) != NULL) {
1109                                                 strlcpy(hphone, p,
1110                                                     sizeof(hphone));
1111                                         }
1112                                 }
1113                         }
1114                 }
1115                 /*
1116                  * Handle '&' in gecos field
1117                  */
1118                 if ((p = strchr(uname, '&')) != NULL) {
1119                         int             l = strlen(pwd->pw_name);
1120                         int             m = strlen(p);
1121
1122                         memmove(p + l, p + 1, m);
1123                         memmove(p, pwd->pw_name, l);
1124                         *p = (char) toupper((unsigned char)*p);
1125                 }
1126                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1127                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1128                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1129                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1130                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1131                        " Full Name: %s\n"
1132                        "      Home: %-26.26s      Class: %s\n"
1133                        "     Shell: %-26.26s     Office: %s\n"
1134                        "Work Phone: %-26.26s Home Phone: %s\n"
1135                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1136                        pwd->pw_name, (long) pwd->pw_uid,
1137                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1138                        uname, pwd->pw_dir, pwd->pw_class,
1139                        pwd->pw_shell, office, wphone, hphone,
1140                        acexpire, pwexpire);
1141                 SETGRENT();
1142                 j = 0;
1143                 while ((grp=GETGRENT()) != NULL)
1144                 {
1145                         int     i = 0;
1146                         while (grp->gr_mem[i] != NULL)
1147                         {
1148                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1149                                 {
1150                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1151                                         break;
1152                                 }
1153                                 ++i;
1154                         }
1155                 }
1156                 ENDGRENT();
1157                 printf("%s", j ? "\n" : "");
1158         }
1159         return EXIT_SUCCESS;
1160 }
1161
1162 char    *
1163 pw_checkname(u_char *name, int gecos)
1164 {
1165         char showch[8];
1166         u_char const *badchars, *ch, *showtype;
1167         int reject;
1168
1169         ch = name;
1170         reject = 0;
1171         if (gecos) {
1172                 /* See if the name is valid as a gecos (comment) field. */
1173                 badchars = ":!@";
1174                 showtype = "gecos field";
1175         } else {
1176                 /* See if the name is valid as a userid or group. */
1177                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1178                 showtype = "userid/group name";
1179                 /* Userids and groups can not have a leading '-'. */
1180                 if (*ch == '-')
1181                         reject = 1;
1182         }
1183         if (!reject) {
1184                 while (*ch) {
1185                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1186                             *ch == 127) {
1187                                 reject = 1;
1188                                 break;
1189                         }
1190                         /* 8-bit characters are only allowed in GECOS fields */
1191                         if (!gecos && (*ch & 0x80)) {
1192                                 reject = 1;
1193                                 break;
1194                         }
1195                         ch++;
1196                 }
1197         }
1198         /*
1199          * A `$' is allowed as the final character for userids and groups,
1200          * mainly for the benefit of samba.
1201          */
1202         if (reject && !gecos) {
1203                 if (*ch == '$' && *(ch + 1) == '\0') {
1204                         reject = 0;
1205                         ch++;
1206                 }
1207         }
1208         if (reject) {
1209                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1210                     ? "`%c'" : "0x%02x", *ch);
1211                 errx(EX_DATAERR, "invalid character %s at position %d in %s",
1212                     showch, (ch - name), showtype);
1213         }
1214         if (!gecos && (ch - name) > LOGNAMESIZE)
1215                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1216                     LOGNAMESIZE);
1217         return (char *)name;
1218 }
1219
1220
1221 static void
1222 rmat(uid_t uid)
1223 {
1224         DIR            *d = opendir("/var/at/jobs");
1225
1226         if (d != NULL) {
1227                 struct dirent  *e;
1228
1229                 while ((e = readdir(d)) != NULL) {
1230                         struct stat     st;
1231
1232                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1233                             stat(e->d_name, &st) == 0 &&
1234                             !S_ISDIR(st.st_mode) &&
1235                             st.st_uid == uid) {
1236                                 char            tmp[MAXPATHLEN];
1237
1238                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1239                                 system(tmp);
1240                         }
1241                 }
1242                 closedir(d);
1243         }
1244 }
1245
1246 static void
1247 rmopie(char const * name)
1248 {
1249         static const char etcopie[] = "/etc/opiekeys";
1250         FILE   *fp = fopen(etcopie, "r+");
1251
1252         if (fp != NULL) {
1253                 char    tmp[1024];
1254                 off_t   atofs = 0;
1255                 int     length = strlen(name);
1256
1257                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1258                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1259                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1260                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1261                                 }
1262                                 break;
1263                         }
1264                         atofs = ftell(fp);
1265                 }
1266                 /*
1267                  * If we got an error of any sort, don't update!
1268                  */
1269                 fclose(fp);
1270         }
1271 }
1272