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: src/usr.sbin/pw/pw_user.c,v 1.34.2.13 2003/02/01 21:20:10 gad Exp $";
  31 #endif /* not lint */
  32
  33 #include <ctype.h>
  34 #include <err.h>
  35 #include <fcntl.h>
  36 #include <sys/param.h>
  37 #include <dirent.h>
  38 #include <paths.h>
  39 #include <termios.h>
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/resource.h>
  43 #include <unistd.h>
  44 #include <utmp.h>
  45 #include <login_cap.h>
  46 #if defined(USE_MD5RAND)
  47 #include <md5.h>
  48 #endif
  49 #include "pw.h"
  50 #include "bitmap.h"
  51
  52 #if (MAXLOGNAME-1) > UT_NAMESIZE
  53 #define LOGNAMESIZE UT_NAMESIZE
  54 #else
  55 #define LOGNAMESIZE (MAXLOGNAME-1)
  56 #endif
  57
  58 static          char locked_str[] = "*LOCKED*";
  59
  60 static int      print_user(struct passwd * pwd, int pretty, int v7);
  61 static uid_t    pw_uidpolicy(struct userconf * cnf, struct cargs * args);
  62 static uid_t    pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer);
  63 static time_t   pw_pwdpolicy(struct userconf * cnf, struct cargs * args);
  64 static time_t   pw_exppolicy(struct userconf * cnf, struct cargs * args);
  65 static char    *pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user);
  66 static char    *pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell);
  67 static char    *pw_password(struct userconf * cnf, struct cargs * args, char const * user);
  68 static char    *shell_path(char const * path, char *shells[], char *sh);
  69 static void     rmat(uid_t uid);
  70 static void     rmskey(char const * name);
  71
  72 /*-
  73  * -C config      configuration file
  74  * -q             quiet operation
  75  * -n name        login name
  76  * -u uid         user id
  77  * -c comment     user name/comment
  78  * -d directory   home directory
  79  * -e date        account expiry date
  80  * -p date        password expiry date
  81  * -g grp         primary group
  82  * -G grp1,grp2   additional groups
  83  * -m [ -k dir ]  create and set up home
  84  * -s shell       name of login shell
  85  * -o             duplicate uid ok
  86  * -L class       user class
  87  * -l name        new login name
  88  * -h fd          password filehandle
  89  * -F             force print or add
  90  *   Setting defaults:
  91  * -D             set user defaults
  92  * -b dir         default home root dir
  93  * -e period      default expiry period
  94  * -p period      default password change period
  95  * -g group       default group
  96  * -G             grp1,grp2.. default additional groups
  97  * -L class       default login class
  98  * -k dir         default home skeleton
  99  * -s shell       default shell
 100  * -w method      default password method
 101  */
 102
 103 int
 104 pw_user(struct userconf * cnf, int mode, struct cargs * args)
 105 {
 106         int             rc, edited = 0;
 107         char           *p = NULL;
 108         char                                     *passtmp;
 109         struct carg    *a_name;
 110         struct carg    *a_uid;
 111         struct carg    *arg;
 112         struct passwd  *pwd = NULL;
 113         struct group   *grp;
 114         struct stat     st;
 115         char            line[_PASSWORD_LEN+1];
 116         FILE           *fp;
 117
 118         static struct passwd fakeuser =
 119         {
 120                 NULL,
 121                 "*",
 122                 -1,
 123                 -1,
 124                 0,
 125                 "",
 126                 "User &",
 127                 "/nonexistent",
 128                 "/bin/sh",
 129                 0
 130 #if defined(__FreeBSD__)
 131                 ,0
 132 #endif
 133         };
 134
 135
 136         /*
 137          * With M_NEXT, we only need to return the
 138          * next uid to stdout
 139          */
 140         if (mode == M_NEXT)
 141         {
 142                 uid_t next = pw_uidpolicy(cnf, args);
 143                 if (getarg(args, 'q'))
 144                         return next;
 145                 printf("%ld:", (long)next);
 146                 pw_group(cnf, mode, args);
 147                 return EXIT_SUCCESS;
 148         }
 149
 150         /*
 151          * We can do all of the common legwork here
 152          */
 153
 154         if ((arg = getarg(args, 'b')) != NULL) {
 155                 cnf->home = arg->val;
 156         }
 157
 158         /*
 159          * If we'll need to use it or we're updating it,
 160          * then create the base home directory if necessary
 161          */
 162         if (arg != NULL || getarg(args, 'm') != NULL) {
 163                 int     l = strlen(cnf->home);
 164
 165                 if (l > 1 && cnf->home[l-1] == '/')     /* Shave off any trailing path delimiter */
 166                         cnf->home[--l] = '\0';
 167
 168                 if (l < 2 || *cnf->home != '/')         /* Check for absolute path name */
 169                         errx(EX_DATAERR, "invalid base directory for home '%s'", cnf->home);
 170
 171                 if (stat(cnf->home, &st) == -1) {
 172                         char    dbuf[MAXPATHLEN];
 173
 174                         /*
 175                          * This is a kludge especially for Joerg :)
 176                          * If the home directory would be created in the root partition, then
 177                          * we really create it under /usr which is likely to have more space.
 178                          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 179                          */
 180                         if (strchr(cnf->home+1, '/') == NULL) {
 181                                 strcpy(dbuf, "/usr");
 182                                 strncat(dbuf, cnf->home, MAXPATHLEN-5);
 183                                 if (mkdir(dbuf, 0755) != -1 || errno == EEXIST) {
 184                                         chown(dbuf, 0, 0);
 185                                         symlink(dbuf, cnf->home);
 186                                 }
 187                                 /* If this falls, fall back to old method */
 188                         }
 189                         p = strncpy(dbuf, cnf->home, sizeof dbuf);
 190                         dbuf[MAXPATHLEN-1] = '\0';
 191                         if (stat(dbuf, &st) == -1) {
 192                                 while ((p = strchr(++p, '/')) != NULL) {
 193                                         *p = '\0';
 194                                         if (stat(dbuf, &st) == -1) {
 195                                                 if (mkdir(dbuf, 0755) == -1)
 196                                                         goto direrr;
 197                                                 chown(dbuf, 0, 0);
 198                                         } else if (!S_ISDIR(st.st_mode))
 199                                                 errx(EX_OSFILE, "'%s' (root home parent) is not a directory", dbuf);
 200                                         *p = '/';
 201                                 }
 202                         }
 203                         if (stat(dbuf, &st) == -1) {
 204                                 if (mkdir(dbuf, 0755) == -1) {
 205                                 direrr: err(EX_OSFILE, "mkdir '%s'", dbuf);
 206                                 }
 207                                 chown(dbuf, 0, 0);
 208                         }
 209                 } else if (!S_ISDIR(st.st_mode))
 210                         errx(EX_OSFILE, "root home `%s' is not a directory", cnf->home);
 211         }
 212
 213         if ((arg = getarg(args, 'e')) != NULL)
 214                 cnf->expire_days = atoi(arg->val);
 215
 216         if ((arg = getarg(args, 'y')) != NULL)
 217                 cnf->nispasswd = arg->val;
 218
 219         if ((arg = getarg(args, 'p')) != NULL && arg->val)
 220                 cnf->password_days = atoi(arg->val);
 221
 222         if ((arg = getarg(args, 'g')) != NULL) {
 223                 if (!*(p = arg->val))   /* Handle empty group list specially */
 224                         cnf->default_group = "";
 225                 else {
 226                         if ((grp = GETGRNAM(p)) == NULL) {
 227                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 228                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 229                         }
 230                         cnf->default_group = newstr(grp->gr_name);
 231                 }
 232         }
 233         if ((arg = getarg(args, 'L')) != NULL)
 234                 cnf->default_class = pw_checkname((u_char *)arg->val, 0);
 235
 236         if ((arg = getarg(args, 'G')) != NULL && arg->val) {
 237                 int i = 0;
 238
 239                 for (p = strtok(arg->val, ", \t"); p != NULL; p = strtok(NULL, ", \t")) {
 240                         if ((grp = GETGRNAM(p)) == NULL) {
 241                                 if (!isdigit((unsigned char)*p) || (grp = GETGRGID((gid_t) atoi(p))) == NULL)
 242                                         errx(EX_NOUSER, "group `%s' does not exist", p);
 243                         }
 244                         if (extendarray(&cnf->groups, &cnf->numgroups, i + 2) != -1)
 245                                 cnf->groups[i++] = newstr(grp->gr_name);
 246                 }
 247                 while (i < cnf->numgroups)
 248                         cnf->groups[i++] = NULL;
 249         }
 250
 251         if ((arg = getarg(args, 'k')) != NULL) {
 252                 if (stat(cnf->dotdir = arg->val, &st) == -1 || !S_ISDIR(st.st_mode))
 253                         errx(EX_OSFILE, "skeleton `%s' is not a directory or does not exist", cnf->dotdir);
 254         }
 255
 256         if ((arg = getarg(args, 's')) != NULL)
 257                 cnf->shell_default = arg->val;
 258
 259         if ((arg = getarg(args, 'w')) != NULL)
 260                 cnf->default_password = boolean_val(arg->val, cnf->default_password);
 261         if (mode == M_ADD && getarg(args, 'D')) {
 262                 if (getarg(args, 'n') != NULL)
 263                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
 264                 if ((arg = getarg(args, 'u')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 265                         if ((cnf->min_uid = (uid_t) atoi(p)) == 0)
 266                                 cnf->min_uid = 1000;
 267                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_uid = (uid_t) atoi(p)) < cnf->min_uid)
 268                                 cnf->max_uid = 32000;
 269                 }
 270                 if ((arg = getarg(args, 'i')) != NULL && (p = strtok(arg->val, ", \t")) != NULL) {
 271                         if ((cnf->min_gid = (gid_t) atoi(p)) == 0)
 272                                 cnf->min_gid = 1000;
 273                         if ((p = strtok(NULL, " ,\t")) == NULL || (cnf->max_gid = (gid_t) atoi(p)) < cnf->min_gid)
 274                                 cnf->max_gid = 32000;
 275                 }
 276
 277                 arg = getarg(args, 'C');
 278                 if (write_userconfig(arg ? arg->val : NULL))
 279                         return EXIT_SUCCESS;
 280                 warn("config update");
 281                 return EX_IOERR;
 282         }
 283
 284         if (mode == M_PRINT && getarg(args, 'a')) {
 285                 int             pretty = getarg(args, 'P') != NULL;
 286                 int             v7 = getarg(args, '7') != NULL;
 287
 288                 SETPWENT();
 289                 while ((pwd = GETPWENT()) != NULL)
 290                         print_user(pwd, pretty, v7);
 291                 ENDPWENT();
 292                 return EXIT_SUCCESS;
 293         }
 294
 295         if ((a_name = getarg(args, 'n')) != NULL)
 296                 pwd = GETPWNAM(pw_checkname((u_char *)a_name->val, 0));
 297         a_uid = getarg(args, 'u');
 298
 299         if (a_uid == NULL) {
 300                 if (a_name == NULL)
 301                         errx(EX_DATAERR, "user name or id required");
 302
 303                 /*
 304                  * Determine whether 'n' switch is name or uid - we don't
 305                  * really don't really care which we have, but we need to
 306                  * know.
 307                  */
 308                 if (mode != M_ADD && pwd == NULL
 309                     && strspn(a_name->val, "0123456789") == strlen(a_name->val)
 310                     && atoi(a_name->val) > 0) { /* Assume uid */
 311                         (a_uid = a_name)->ch = 'u';
 312                         a_name = NULL;
 313                 }
 314         }
 315
 316         /*
 317          * Update, delete & print require that the user exists
 318          */
 319         if (mode == M_UPDATE || mode == M_DELETE ||
 320             mode == M_PRINT  || mode == M_LOCK   || mode == M_UNLOCK) {
 321
 322                 if (a_name == NULL && pwd == NULL)      /* Try harder */
 323                         pwd = GETPWUID(atoi(a_uid->val));
 324
 325                 if (pwd == NULL) {
 326                         if (mode == M_PRINT && getarg(args, 'F')) {
 327                                 fakeuser.pw_name = a_name ? a_name->val : "nouser";
 328                                 fakeuser.pw_uid = a_uid ? (uid_t) atol(a_uid->val) : -1;
 329                                 return print_user(&fakeuser,
 330                                                   getarg(args, 'P') != NULL,
 331                                                   getarg(args, '7') != NULL);
 332                         }
 333                         if (a_name == NULL)
 334                                 errx(EX_NOUSER, "no such uid `%s'", a_uid->val);
 335                         errx(EX_NOUSER, "no such user `%s'", a_name->val);
 336                 }
 337
 338                 if (a_name == NULL)     /* May be needed later */
 339                         a_name = addarg(args, 'n', newstr(pwd->pw_name));
 340
 341                 /*
 342                  * The M_LOCK and M_UNLOCK functions simply add or remove
 343                  * a "*LOCKED*" prefix from in front of the password to
 344                  * prevent it decoding correctly, and therefore prevents
 345                  * access. Of course, this only prevents access via
 346                  * password authentication (not ssh, kerberos or any
 347                  * other method that does not use the UNIX password) but
 348                  * that is a known limitation.
 349                  */
 350
 351                 if (mode == M_LOCK) {
 352                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) == 0)
 353                                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 354                         passtmp = malloc(strlen(pwd->pw_passwd) + sizeof(locked_str));
 355                         if (passtmp == NULL)    /* disaster */
 356                                 errx(EX_UNAVAILABLE, "out of memory");
 357                         strcpy(passtmp, locked_str);
 358                         strcat(passtmp, pwd->pw_passwd);
 359                         pwd->pw_passwd = passtmp;
 360                         edited = 1;
 361                 } else if (mode == M_UNLOCK) {
 362                         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str)-1) != 0)
 363                                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 364                         pwd->pw_passwd += sizeof(locked_str)-1;
 365                         edited = 1;
 366                 } else if (mode == M_DELETE) {
 367                         /*
 368                          * Handle deletions now
 369                          */
 370                         char            file[MAXPATHLEN];
 371                         char            home[MAXPATHLEN];
 372                         uid_t           uid = pwd->pw_uid;
 373
 374                         if (strcmp(pwd->pw_name, "root") == 0)
 375                                 errx(EX_DATAERR, "cannot remove user 'root'");
 376
 377                         if (!PWALTDIR()) {
 378                                 /*
 379                                  * Remove skey record from /etc/skeykeys
 380                                  */
 381
 382                                 rmskey(pwd->pw_name);
 383
 384                                 /*
 385                                  * Remove crontabs
 386                                  */
 387                                 sprintf(file, "/var/cron/tabs/%s", pwd->pw_name);
 388                                 if (access(file, F_OK) == 0) {
 389                                         sprintf(file, "crontab -u %s -r", pwd->pw_name);
 390                                         system(file);
 391                                 }
 392                         }
 393                         /*
 394                          * Save these for later, since contents of pwd may be
 395                          * invalidated by deletion
 396                          */
 397                         sprintf(file, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 398                         strncpy(home, pwd->pw_dir, sizeof home);
 399                         home[sizeof home - 1] = '\0';
 400
 401                         rc = delpwent(pwd);
 402                         if (rc == -1)
 403                                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 404                         else if (rc != 0) {
 405                                 warn("passwd update");
 406                                 return EX_IOERR;
 407                         }
 408
 409                         if (cnf->nispasswd && *cnf->nispasswd=='/') {
 410                                 rc = delnispwent(cnf->nispasswd, a_name->val);
 411                                 if (rc == -1)
 412                                         warnx("WARNING: user '%s' does not exist in NIS passwd", pwd->pw_name);
 413                                 else if (rc != 0)
 414                                         warn("WARNING: NIS passwd update");
 415                                 /* non-fatal */
 416                         }
 417
 418                         editgroups(a_name->val, NULL);
 419
 420                         pw_log(cnf, mode, W_USER, "%s(%ld) account removed", a_name->val, (long) uid);
 421
 422                         if (!PWALTDIR()) {
 423                                 /*
 424                                  * Remove mail file
 425                                  */
 426                                 remove(file);
 427
 428                                 /*
 429                                  * Remove at jobs
 430                                  */
 431                                 if (getpwuid(uid) == NULL)
 432                                         rmat(uid);
 433
 434                                 /*
 435                                  * Remove home directory and contents
 436                                  */
 437                                 if (getarg(args, 'r') != NULL && *home == '/' && getpwuid(uid) == NULL) {
 438                                         if (stat(home, &st) != -1) {
 439                                                 rm_r(home, uid);
 440                                                 pw_log(cnf, mode, W_USER, "%s(%ld) home '%s' %sremoved",
 441                                                        a_name->val, (long) uid, home,
 442                                                        stat(home, &st) == -1 ? "" : "not completely ");
 443                                         }
 444                                 }
 445                         }
 446                         return EXIT_SUCCESS;
 447                 } else if (mode == M_PRINT)
 448                         return print_user(pwd,
 449                                           getarg(args, 'P') != NULL,
 450                                           getarg(args, '7') != NULL);
 451
 452                 /*
 453                  * The rest is edit code
 454                  */
 455                 if ((arg = getarg(args, 'l')) != NULL) {
 456                         if (strcmp(pwd->pw_name, "root") == 0)
 457                                 errx(EX_DATAERR, "can't rename `root' account");
 458                         pwd->pw_name = pw_checkname((u_char *)arg->val, 0);
 459                         edited = 1;
 460                 }
 461
 462                 if ((arg = getarg(args, 'u')) != NULL && isdigit((unsigned char)*arg->val)) {
 463                         pwd->pw_uid = (uid_t) atol(arg->val);
 464                         edited = 1;
 465                         if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
 466                                 errx(EX_DATAERR, "can't change uid of `root' account");
 467                         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 468                                 warnx("WARNING: account `%s' will have a uid of 0 (superuser access!)", pwd->pw_name);
 469                 }
 470
 471                 if ((arg = getarg(args, 'g')) != NULL && pwd->pw_uid != 0) {    /* Already checked this */
 472                         gid_t newgid = (gid_t) GETGRNAM(cnf->default_group)->gr_gid;
 473                         if (newgid != pwd->pw_gid) {
 474                                 edited = 1;
 475                                 pwd->pw_gid = newgid;
 476                         }
 477                 }
 478
 479                 if ((arg = getarg(args, 'p')) != NULL) {
 480                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 481                                 if (pwd->pw_change != 0) {
 482                                         pwd->pw_change = 0;
 483                                         edited = 1;
 484                                 }
 485                         }
 486                         else {
 487                                 time_t          now = time(NULL);
 488                                 time_t          expire = parse_date(now, arg->val);
 489
 490                                 if (now == expire)
 491                                         errx(EX_DATAERR, "invalid password change date `%s'", arg->val);
 492                                 if (pwd->pw_change != expire) {
 493                                         pwd->pw_change = expire;
 494                                         edited = 1;
 495                                 }
 496                         }
 497                 }
 498
 499                 if ((arg = getarg(args, 'e')) != NULL) {
 500                         if (*arg->val == '\0' || strcmp(arg->val, "0") == 0) {
 501                                 if (pwd->pw_expire != 0) {
 502                                         pwd->pw_expire = 0;
 503                                         edited = 1;
 504                                 }
 505                         }
 506                         else {
 507                                 time_t          now = time(NULL);
 508                                 time_t          expire = parse_date(now, arg->val);
 509
 510                                 if (now == expire)
 511                                         errx(EX_DATAERR, "invalid account expiry date `%s'", arg->val);
 512                                 if (pwd->pw_expire != expire) {
 513                                         pwd->pw_expire = expire;
 514                                         edited = 1;
 515                                 }
 516                         }
 517                 }
 518
 519                 if ((arg = getarg(args, 's')) != NULL) {
 520                         char *shell = shell_path(cnf->shelldir, cnf->shells, arg->val);
 521                         if (shell == NULL)
 522                                 shell = "";
 523                         if (strcmp(shell, pwd->pw_shell) != 0) {
 524                                 pwd->pw_shell = shell;
 525                                 edited = 1;
 526                         }
 527                 }
 528
 529                 if (getarg(args, 'L')) {
 530                         if (cnf->default_class == NULL)
 531                                 cnf->default_class = "";
 532                         if (strcmp(pwd->pw_class, cnf->default_class) != 0) {
 533                                 pwd->pw_class = cnf->default_class;
 534                                 edited = 1;
 535                         }
 536                 }
 537
 538                 if ((arg  = getarg(args, 'd')) != NULL) {
 539                         edited = strcmp(pwd->pw_dir, arg->val) != 0;
 540                         if (stat(pwd->pw_dir = arg->val, &st) == -1) {
 541                                 if (getarg(args, 'm') == NULL && strcmp(pwd->pw_dir, "/nonexistent") != 0)
 542                                   warnx("WARNING: home `%s' does not exist", pwd->pw_dir);
 543                         } else if (!S_ISDIR(st.st_mode))
 544                                 warnx("WARNING: home `%s' is not a directory", pwd->pw_dir);
 545                 }
 546
 547                 if ((arg = getarg(args, 'w')) != NULL && getarg(args, 'h') == NULL) {
 548                         login_cap_t *lc;
 549
 550                         lc = login_getpwclass(pwd);
 551                         if (lc == NULL ||
 552                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 553                                 warn("setting crypt(3) format");
 554                         login_close(lc);
 555                         pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 556                         edited = 1;
 557                 }
 558
 559         } else {
 560                 login_cap_t *lc;
 561
 562                 /*
 563                  * Add code
 564                  */
 565
 566                 if (a_name == NULL)     /* Required */
 567                         errx(EX_DATAERR, "login name required");
 568                 else if ((pwd = GETPWNAM(a_name->val)) != NULL) /* Exists */
 569                         errx(EX_DATAERR, "login name `%s' already exists", a_name->val);
 570
 571                 /*
 572                  * Now, set up defaults for a new user
 573                  */
 574                 pwd = &fakeuser;
 575                 pwd->pw_name = a_name->val;
 576                 pwd->pw_class = cnf->default_class ? cnf->default_class : "";
 577                 pwd->pw_uid = pw_uidpolicy(cnf, args);
 578                 pwd->pw_gid = pw_gidpolicy(cnf, args, pwd->pw_name, (gid_t) pwd->pw_uid);
 579                 pwd->pw_change = pw_pwdpolicy(cnf, args);
 580                 pwd->pw_expire = pw_exppolicy(cnf, args);
 581                 pwd->pw_dir = pw_homepolicy(cnf, args, pwd->pw_name);
 582                 pwd->pw_shell = pw_shellpolicy(cnf, args, NULL);
 583                 lc = login_getpwclass(pwd);
 584                 if (lc == NULL || login_setcryptfmt(lc, "md5", NULL) == NULL)
 585                         warn("setting crypt(3) format");
 586                 login_close(lc);
 587                 pwd->pw_passwd = pw_password(cnf, args, pwd->pw_name);
 588                 edited = 1;
 589
 590                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
 591                         warnx("WARNING: new account `%s' has a uid of 0 (superuser access!)", pwd->pw_name);
 592         }
 593
 594         /*
 595          * Shared add/edit code
 596          */
 597         if ((arg = getarg(args, 'c')) != NULL) {
 598                 char    *gecos = pw_checkname((u_char *)arg->val, 1);
 599                 if (strcmp(pwd->pw_gecos, gecos) != 0) {
 600                         pwd->pw_gecos = gecos;
 601                         edited = 1;
 602                 }
 603         }
 604
 605         if ((arg = getarg(args, 'h')) != NULL) {
 606                 if (strcmp(arg->val, "-") == 0) {
 607                         if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 608                                 pwd->pw_passwd = "*";   /* No access */
 609                                 edited = 1;
 610                         }
 611                 } else {
 612                         int             fd = atoi(arg->val);
 613                         int             b;
 614                         int             istty = isatty(fd);
 615                         struct termios  t;
 616                         login_cap_t     *lc;
 617
 618                         if (istty) {
 619                                 if (tcgetattr(fd, &t) == -1)
 620                                         istty = 0;
 621                                 else {
 622                                         struct termios  n = t;
 623
 624                                         /* Disable echo */
 625                                         n.c_lflag &= ~(ECHO);
 626                                         tcsetattr(fd, TCSANOW, &n);
 627                                         printf("%sassword for user %s:", (mode == M_UPDATE) ? "New p" : "P", pwd->pw_name);
 628                                         fflush(stdout);
 629                                 }
 630                         }
 631                         b = read(fd, line, sizeof(line) - 1);
 632                         if (istty) {    /* Restore state */
 633                                 tcsetattr(fd, TCSANOW, &t);
 634                                 fputc('\n', stdout);
 635                                 fflush(stdout);
 636                         }
 637                         if (b < 0) {
 638                                 warn("-h file descriptor");
 639                                 return EX_IOERR;
 640                         }
 641                         line[b] = '\0';
 642                         if ((p = strpbrk(line, " \t\r\n")) != NULL)
 643                                 *p = '\0';
 644                         if (!*line)
 645                                 errx(EX_DATAERR, "empty password read on file descriptor %d", fd);
 646                         lc = login_getpwclass(pwd);
 647                         if (lc == NULL ||
 648                             login_setcryptfmt(lc, "md5", NULL) == NULL)
 649                                 warn("setting crypt(3) format");
 650                         login_close(lc);
 651                         pwd->pw_passwd = pw_pwcrypt(line);
 652                         edited = 1;
 653                 }
 654         }
 655
 656         /*
 657          * Special case: -N only displays & exits
 658          */
 659         if (getarg(args, 'N') != NULL)
 660                 return print_user(pwd,
 661                                   getarg(args, 'P') != NULL,
 662                                   getarg(args, '7') != NULL);
 663
 664         if (mode == M_ADD) {
 665                 edited = 1;     /* Always */
 666                 rc = addpwent(pwd);
 667                 if (rc == -1) {
 668                         warnx("user '%s' already exists", pwd->pw_name);
 669                         return EX_IOERR;
 670                 } else if (rc != 0) {
 671                         warn("passwd file update");
 672                         return EX_IOERR;
 673                 }
 674                 if (cnf->nispasswd && *cnf->nispasswd=='/') {
 675                         rc = addnispwent(cnf->nispasswd, pwd);
 676                         if (rc == -1)
 677                                 warnx("User '%s' already exists in NIS passwd", pwd->pw_name);
 678                         else
 679                                 warn("NIS passwd update");
 680                         /* NOTE: we treat NIS-only update errors as non-fatal */
 681                 }
 682         } else if (mode == M_UPDATE || mode == M_LOCK || mode == M_UNLOCK) {
 683                 if (edited) {   /* Only updated this if required */
 684                         rc = chgpwent(a_name->val, pwd);
 685                         if (rc == -1) {
 686                                 warnx("user '%s' does not exist (NIS?)", pwd->pw_name);
 687                                 return EX_IOERR;
 688                         } else if (rc != 0) {
 689                                 warn("passwd file update");
 690                                 return EX_IOERR;
 691                         }
 692                         if ( cnf->nispasswd && *cnf->nispasswd=='/') {
 693                                 rc = chgnispwent(cnf->nispasswd, a_name->val, pwd);
 694                                 if (rc == -1)
 695                                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 696                                 else
 697                                         warn("NIS passwd update");
 698                                 /* NOTE: NIS-only update errors are not fatal */
 699                         }
 700                 }
 701         }
 702
 703         /*
 704          * Ok, user is created or changed - now edit group file
 705          */
 706
 707         if (mode == M_ADD || getarg(args, 'G') != NULL)
 708                 editgroups(pwd->pw_name, cnf->groups);
 709
 710         /* go get a current version of pwd */
 711         pwd = GETPWNAM(a_name->val);
 712         if (pwd == NULL) {
 713                 /* This will fail when we rename, so special case that */
 714                 if (mode == M_UPDATE && (arg = getarg(args, 'l')) != NULL) {
 715                         a_name->val = arg->val;         /* update new name */
 716                         pwd = GETPWNAM(a_name->val);    /* refetch renamed rec */
 717                 }
 718         }
 719         if (pwd == NULL)        /* can't go on without this */
 720                 errx(EX_NOUSER, "user '%s' disappeared during update", a_name->val);
 721
 722         grp = GETGRGID(pwd->pw_gid);
 723         pw_log(cnf, mode, W_USER, "%s(%ld):%s(%ld):%s:%s:%s",
 724                pwd->pw_name, (long) pwd->pw_uid,
 725             grp ? grp->gr_name : "unknown", (long) (grp ? grp->gr_gid : -1),
 726                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
 727
 728         /*
 729          * If adding, let's touch and chown the user's mail file. This is not
 730          * strictly necessary under BSD with a 0755 maildir but it also
 731          * doesn't hurt anything to create the empty mailfile
 732          */
 733         if (mode == M_ADD) {
 734                 if (!PWALTDIR()) {
 735                         sprintf(line, "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 736                         close(open(line, O_RDWR | O_CREAT, 0600));      /* Preserve contents &
 737                                                                          * mtime */
 738                         chown(line, pwd->pw_uid, pwd->pw_gid);
 739                 }
 740         }
 741
 742         /*
 743          * Let's create and populate the user's home directory. Note
 744          * that this also `works' for editing users if -m is used, but
 745          * existing files will *not* be overwritten.
 746          */
 747         if (!PWALTDIR() && getarg(args, 'm') != NULL && pwd->pw_dir && *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
 748                 copymkdir(pwd->pw_dir, cnf->dotdir, 0755, pwd->pw_uid, pwd->pw_gid);
 749                 pw_log(cnf, mode, W_USER, "%s(%ld) home %s made",
 750                        pwd->pw_name, (long) pwd->pw_uid, pwd->pw_dir);
 751         }
 752
 753
 754         /*
 755          * Finally, send mail to the new user as well, if we are asked to
 756          */
 757         if (mode == M_ADD && !PWALTDIR() && cnf->newmail && *cnf->newmail && (fp = fopen(cnf->newmail, "r")) != NULL) {
 758                 FILE           *pfp = popen(_PATH_SENDMAIL " -t", "w");
 759
 760                 if (pfp == NULL)
 761                         warn("sendmail");
 762                 else {
 763                         fprintf(pfp, "From: root\n" "To: %s\n" "Subject: Welcome!\n\n", pwd->pw_name);
 764                         while (fgets(line, sizeof(line), fp) != NULL) {
 765                                 /* Do substitutions? */
 766                                 fputs(line, pfp);
 767                         }
 768                         pclose(pfp);
 769                         pw_log(cnf, mode, W_USER, "%s(%ld) new user mail sent",
 770                             pwd->pw_name, (long) pwd->pw_uid);
 771                 }
 772                 fclose(fp);
 773         }
 774
 775         return EXIT_SUCCESS;
 776 }
 777
 778
 779 static          uid_t
 780 pw_uidpolicy(struct userconf * cnf, struct cargs * args)
 781 {
 782         struct passwd  *pwd;
 783         uid_t           uid = (uid_t) - 1;
 784         struct carg    *a_uid = getarg(args, 'u');
 785
 786         /*
 787          * Check the given uid, if any
 788          */
 789         if (a_uid != NULL) {
 790                 uid = (uid_t) atol(a_uid->val);
 791
 792                 if ((pwd = GETPWUID(uid)) != NULL && getarg(args, 'o') == NULL)
 793                         errx(EX_DATAERR, "uid `%ld' has already been allocated", (long) pwd->pw_uid);
 794         } else {
 795                 struct bitmap   bm;
 796
 797                 /*
 798                  * We need to allocate the next available uid under one of
 799                  * two policies a) Grab the first unused uid b) Grab the
 800                  * highest possible unused uid
 801                  */
 802                 if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 803                                                          * claus^H^H^H^Hheck */
 804                         cnf->min_uid = 1000;
 805                         cnf->max_uid = 32000;
 806                 }
 807                 bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 808
 809                 /*
 810                  * Now, let's fill the bitmap from the password file
 811                  */
 812                 SETPWENT();
 813                 while ((pwd = GETPWENT()) != NULL)
 814                         if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 815                                 bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 816                 ENDPWENT();
 817
 818                 /*
 819                  * Then apply the policy, with fallback to reuse if necessary
 820                  */
 821                 if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 822                         uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 823
 824                 /*
 825                  * Another sanity check
 826                  */
 827                 if (uid < cnf->min_uid || uid > cnf->max_uid)
 828                         errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 829                 bm_dealloc(&bm);
 830         }
 831         return uid;
 832 }
 833
 834
 835 static          uid_t
 836 pw_gidpolicy(struct userconf * cnf, struct cargs * args, char *nam, gid_t prefer)
 837 {
 838         struct group   *grp;
 839         gid_t           gid = (uid_t) - 1;
 840         struct carg    *a_gid = getarg(args, 'g');
 841
 842         /*
 843          * If no arg given, see if default can help out
 844          */
 845         if (a_gid == NULL && cnf->default_group && *cnf->default_group)
 846                 a_gid = addarg(args, 'g', cnf->default_group);
 847
 848         /*
 849          * Check the given gid, if any
 850          */
 851         SETGRENT();
 852         if (a_gid != NULL) {
 853                 if ((grp = GETGRNAM(a_gid->val)) == NULL) {
 854                         gid = (gid_t) atol(a_gid->val);
 855                         if ((gid == 0 && !isdigit((unsigned char)*a_gid->val)) || (grp = GETGRGID(gid)) == NULL)
 856                                 errx(EX_NOUSER, "group `%s' is not defined", a_gid->val);
 857                 }
 858                 gid = grp->gr_gid;
 859         } else if ((grp = GETGRNAM(nam)) != NULL && grp->gr_mem[0] == NULL) {
 860                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 861         } else {
 862                 struct cargs    grpargs;
 863                 char            tmp[32];
 864
 865                 LIST_INIT(&grpargs);
 866                 addarg(&grpargs, 'n', nam);
 867
 868                 /*
 869                  * We need to auto-create a group with the user's name. We
 870                  * can send all the appropriate output to our sister routine
 871                  * bit first see if we can create a group with gid==uid so we
 872                  * can keep the user and group ids in sync. We purposely do
 873                  * NOT check the gid range if we can force the sync. If the
 874                  * user's name dups an existing group, then the group add
 875                  * function will happily handle that case for us and exit.
 876                  */
 877                 if (GETGRGID(prefer) == NULL) {
 878                         sprintf(tmp, "%lu", (unsigned long) prefer);
 879                         addarg(&grpargs, 'g', tmp);
 880                 }
 881                 if (getarg(args, 'N'))
 882                 {
 883                         addarg(&grpargs, 'N', NULL);
 884                         addarg(&grpargs, 'q', NULL);
 885                         gid = pw_group(cnf, M_NEXT, &grpargs);
 886                 }
 887                 else
 888                 {
 889                         pw_group(cnf, M_ADD, &grpargs);
 890                         if ((grp = GETGRNAM(nam)) != NULL)
 891                                 gid = grp->gr_gid;
 892                 }
 893                 a_gid = grpargs.lh_first;
 894                 while (a_gid != NULL) {
 895                         struct carg    *t = a_gid->list.le_next;
 896                         LIST_REMOVE(a_gid, list);
 897                         a_gid = t;
 898                 }
 899         }
 900         ENDGRENT();
 901         return gid;
 902 }
 903
 904
 905 static          time_t
 906 pw_pwdpolicy(struct userconf * cnf, struct cargs * args)
 907 {
 908         time_t          result = 0;
 909         time_t          now = time(NULL);
 910         struct carg    *arg = getarg(args, 'p');
 911
 912         if (arg != NULL) {
 913                 if ((result = parse_date(now, arg->val)) == now)
 914                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 915         } else if (cnf->password_days > 0)
 916                 result = now + ((long) cnf->password_days * 86400L);
 917         return result;
 918 }
 919
 920
 921 static          time_t
 922 pw_exppolicy(struct userconf * cnf, struct cargs * args)
 923 {
 924         time_t          result = 0;
 925         time_t          now = time(NULL);
 926         struct carg    *arg = getarg(args, 'e');
 927
 928         if (arg != NULL) {
 929                 if ((result = parse_date(now, arg->val)) == now)
 930                         errx(EX_DATAERR, "invalid date/time `%s'", arg->val);
 931         } else if (cnf->expire_days > 0)
 932                 result = now + ((long) cnf->expire_days * 86400L);
 933         return result;
 934 }
 935
 936
 937 static char    *
 938 pw_homepolicy(struct userconf * cnf, struct cargs * args, char const * user)
 939 {
 940         struct carg    *arg = getarg(args, 'd');
 941
 942         if (arg)
 943                 return arg->val;
 944         else {
 945                 static char     home[128];
 946
 947                 if (cnf->home == NULL || *cnf->home == '\0')
 948                         errx(EX_CONFIG, "no base home directory set");
 949                 sprintf(home, "%s/%s", cnf->home, user);
 950                 return home;
 951         }
 952 }
 953
 954 static char    *
 955 shell_path(char const * path, char *shells[], char *sh)
 956 {
 957         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 958                 return sh;      /* specified full path or forced none */
 959         else {
 960                 char           *p;
 961                 char            paths[_UC_MAXLINE];
 962
 963                 /*
 964                  * We need to search paths
 965                  */
 966                 strncpy(paths, path, sizeof paths);
 967                 paths[sizeof paths - 1] = '\0';
 968                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 969                         int             i;
 970                         static char     shellpath[256];
 971
 972                         if (sh != NULL) {
 973                                 sprintf(shellpath, "%s/%s", p, sh);
 974                                 if (access(shellpath, X_OK) == 0)
 975                                         return shellpath;
 976                         } else
 977                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
 978                                         sprintf(shellpath, "%s/%s", p, shells[i]);
 979                                         if (access(shellpath, X_OK) == 0)
 980                                                 return shellpath;
 981                                 }
 982                 }
 983                 if (sh == NULL)
 984                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
 985                 errx(EX_CONFIG, "no default shell available or defined");
 986                 return NULL;
 987         }
 988 }
 989
 990
 991 static char    *
 992 pw_shellpolicy(struct userconf * cnf, struct cargs * args, char *newshell)
 993 {
 994         char           *sh = newshell;
 995         struct carg    *arg = getarg(args, 's');
 996
 997         if (newshell == NULL && arg != NULL)
 998                 sh = arg->val;
 999         return shell_path(cnf->shelldir, cnf->shells, sh ? sh : cnf->shell_default);
1000 }
1001
1002 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.";
1003
1004 char           *
1005 pw_pwcrypt(char *password)
1006 {
1007         int             i;
1008         char            salt[12];
1009
1010         static char     buf[256];
1011
1012         /*
1013          * Calculate a salt value
1014          */
1015         for (i = 0; i < 8; i++)
1016                 salt[i] = chars[arc4random() % 63];
1017         salt[i] = '\0';
1018
1019         return strcpy(buf, crypt(password, salt));
1020 }
1021
1022 #if defined(USE_MD5RAND)
1023 u_char *
1024 pw_getrand(u_char *buf, int len)        /* cryptographically secure rng */
1025 {
1026         int i;
1027         for (i=0;i<len;i+=16) {
1028                 u_char ubuf[16];
1029
1030                 MD5_CTX md5_ctx;
1031                 struct timeval tv, tvo;
1032                 struct rusage ru;
1033                 int n=0;
1034                 int t;
1035
1036                 MD5Init (&md5_ctx);
1037                 t=getpid();
1038                 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
1039                 t=getppid();
1040                 MD5Update (&md5_ctx, (u_char*)&t, sizeof t);
1041                 gettimeofday (&tvo, NULL);
1042                 do {
1043                         getrusage (RUSAGE_SELF, &ru);
1044                         MD5Update (&md5_ctx, (u_char*)&ru, sizeof ru);
1045                         gettimeofday (&tv, NULL);
1046                         MD5Update (&md5_ctx, (u_char*)&tv, sizeof tv);
1047                 } while (n++<20 || tv.tv_usec-tvo.tv_usec<100*1000);
1048                 MD5Final (ubuf, &md5_ctx);
1049                 memcpy(buf+i, ubuf, MIN(16, len-i));
1050         }
1051         return buf;
1052 }
1053
1054 #else   /* Portable version */
1055
1056 static u_char *
1057 pw_getrand(u_char *buf, int len)
1058 {
1059         int i;
1060
1061         srandomdev();
1062         for (i = 0; i < len; i++) {
1063                 unsigned long val = random();
1064                 /* Use all bits in the random value */
1065                 buf[i]=(u_char)((val >> 24) ^ (val >> 16) ^ (val >> 8) ^ val);
1066         }
1067         return buf;
1068 }
1069
1070 #endif
1071
1072 static char    *
1073 pw_password(struct userconf * cnf, struct cargs * args, char const * user)
1074 {
1075         int             i, l;
1076         char            pwbuf[32];
1077         u_char          rndbuf[sizeof pwbuf];
1078
1079         switch (cnf->default_password) {
1080         case -1:                /* Random password */
1081                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
1082                 pw_getrand(rndbuf, l);
1083                 for (i = 0; i < l; i++)
1084                         pwbuf[i] = chars[rndbuf[i] % (sizeof(chars)-1)];
1085                 pwbuf[i] = '\0';
1086
1087                 /*
1088                  * We give this information back to the user
1089                  */
1090                 if (getarg(args, 'h') == NULL && getarg(args, 'N') == NULL) {
1091                         if (isatty(STDOUT_FILENO))
1092                                 printf("Password for '%s' is: ", user);
1093                         printf("%s\n", pwbuf);
1094                         fflush(stdout);
1095                 }
1096                 break;
1097
1098         case -2:                /* No password at all! */
1099                 return "";
1100
1101         case 0:         /* No login - default */
1102         default:
1103                 return "*";
1104
1105         case 1:         /* user's name */
1106                 strncpy(pwbuf, user, sizeof pwbuf);
1107                 pwbuf[sizeof pwbuf - 1] = '\0';
1108                 break;
1109         }
1110         return pw_pwcrypt(pwbuf);
1111 }
1112
1113
1114 static int
1115 print_user(struct passwd * pwd, int pretty, int v7)
1116 {
1117         if (!pretty) {
1118                 char            buf[_UC_MAXLINE];
1119
1120                 fmtpwentry(buf, pwd, v7 ? PWF_PASSWD : PWF_STANDARD);
1121                 fputs(buf, stdout);
1122         } else {
1123                 int             j;
1124                 char           *p;
1125                 struct group   *grp = GETGRGID(pwd->pw_gid);
1126                 char            uname[60] = "User &", office[60] = "[None]",
1127                                 wphone[60] = "[None]", hphone[60] = "[None]";
1128                 char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
1129                 struct tm *    tptr;
1130
1131                 if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
1132                         strncpy(uname, p, sizeof uname);
1133                         uname[sizeof uname - 1] = '\0';
1134                         if ((p = strtok(NULL, ",")) != NULL) {
1135                                 strncpy(office, p, sizeof office);
1136                                 office[sizeof office - 1] = '\0';
1137                                 if ((p = strtok(NULL, ",")) != NULL) {
1138                                         strncpy(wphone, p, sizeof wphone);
1139                                         wphone[sizeof wphone - 1] = '\0';
1140                                         if ((p = strtok(NULL, "")) != NULL) {
1141                                                 strncpy(hphone, p, sizeof hphone);
1142                                                 hphone[sizeof hphone - 1] = '\0';
1143                                         }
1144                                 }
1145                         }
1146                 }
1147                 /*
1148                  * Handle '&' in gecos field
1149                  */
1150                 if ((p = strchr(uname, '&')) != NULL) {
1151                         int             l = strlen(pwd->pw_name);
1152                         int             m = strlen(p);
1153
1154                         memmove(p + l, p + 1, m);
1155                         memmove(p, pwd->pw_name, l);
1156                         *p = (char) toupper((unsigned char)*p);
1157                 }
1158                 if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
1159                         strftime(acexpire, sizeof acexpire, "%c", tptr);
1160                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
1161                         strftime(pwexpire, sizeof pwexpire, "%c", tptr);
1162                 printf("Login Name: %-15s   #%-12ld Group: %-15s   #%ld\n"
1163                        " Full Name: %s\n"
1164                        "      Home: %-26.26s      Class: %s\n"
1165                        "     Shell: %-26.26s     Office: %s\n"
1166                        "Work Phone: %-26.26s Home Phone: %s\n"
1167                        "Acc Expire: %-26.26s Pwd Expire: %s\n",
1168                        pwd->pw_name, (long) pwd->pw_uid,
1169                        grp ? grp->gr_name : "(invalid)", (long) pwd->pw_gid,
1170                        uname, pwd->pw_dir, pwd->pw_class,
1171                        pwd->pw_shell, office, wphone, hphone,
1172                        acexpire, pwexpire);
1173                 SETGRENT();
1174                 j = 0;
1175                 while ((grp=GETGRENT()) != NULL)
1176                 {
1177                         int     i = 0;
1178                         while (grp->gr_mem[i] != NULL)
1179                         {
1180                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0)
1181                                 {
1182                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
1183                                         break;
1184                                 }
1185                                 ++i;
1186                         }
1187                 }
1188                 ENDGRENT();
1189                 printf("%s", j ? "\n" : "");
1190         }
1191         return EXIT_SUCCESS;
1192 }
1193
1194 char    *
1195 pw_checkname(u_char *name, int gecos)
1196 {
1197         char showch[8];
1198         u_char const *badchars, *ch, *showtype;
1199         int reject;
1200
1201         ch = name;
1202         reject = 0;
1203         if (gecos) {
1204                 /* See if the name is valid as a gecos (comment) field. */
1205                 badchars = ":!@";
1206                 showtype = "gecos field";
1207         } else {
1208                 /* See if the name is valid as a userid or group. */
1209                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
1210                 showtype = "userid/group name";
1211                 /* Userids and groups can not have a leading '-'. */
1212                 if (*ch == '-')
1213                         reject = 1;
1214         }
1215         if (!reject) {
1216                 while (*ch) {
1217                         if (strchr(badchars, *ch) != NULL || *ch < ' ' ||
1218                             *ch == 127) {
1219                                 reject = 1;
1220                                 break;
1221                         }
1222                         /* 8-bit characters are only allowed in GECOS fields */
1223                         if (!gecos && (*ch & 0x80)) {
1224                                 reject = 1;
1225                                 break;
1226                         }
1227                         ch++;
1228                 }
1229         }
1230         /*
1231          * A `$' is allowed as the final character for userids and groups,
1232          * mainly for the benefit of samba.
1233          */
1234         if (reject && !gecos) {
1235                 if (*ch == '$' && *(ch + 1) == '\0') {
1236                         reject = 0;
1237                         ch++;
1238                 }
1239         }
1240         if (reject) {
1241                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
1242                     ? "`%c'" : "0x%02x", *ch);
1243                 errx(EX_DATAERR, "invalid character %s at position %d in %s",
1244                     showch, (ch - name), showtype);
1245         }
1246         if (!gecos && (ch - name) > LOGNAMESIZE)
1247                 errx(EX_DATAERR, "name too long `%s' (max is %d)", name,
1248                     LOGNAMESIZE);
1249         return (char *)name;
1250 }
1251
1252
1253 static void
1254 rmat(uid_t uid)
1255 {
1256         DIR            *d = opendir("/var/at/jobs");
1257
1258         if (d != NULL) {
1259                 struct dirent  *e;
1260
1261                 while ((e = readdir(d)) != NULL) {
1262                         struct stat     st;
1263
1264                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
1265                             stat(e->d_name, &st) == 0 &&
1266                             !S_ISDIR(st.st_mode) &&
1267                             st.st_uid == uid) {
1268                                 char            tmp[MAXPATHLEN];
1269
1270                                 sprintf(tmp, "/usr/bin/atrm %s", e->d_name);
1271                                 system(tmp);
1272                         }
1273                 }
1274                 closedir(d);
1275         }
1276 }
1277
1278 static void
1279 rmskey(char const * name)
1280 {
1281         static const char etcskey[] = "/etc/skeykeys";
1282         FILE   *fp = fopen(etcskey, "r+");
1283
1284         if (fp != NULL) {
1285                 char    tmp[1024];
1286                 off_t   atofs = 0;
1287                 int     length = strlen(name);
1288
1289                 while (fgets(tmp, sizeof tmp, fp) != NULL) {
1290                         if (strncmp(name, tmp, length) == 0 && tmp[length]==' ') {
1291                                 if (fseek(fp, atofs, SEEK_SET) == 0) {
1292                                         fwrite("#", 1, 1, fp);  /* Comment username out */
1293                                 }
1294                                 break;
1295                         }
1296                         atofs = ftell(fp);
1297                 }
1298                 /*
1299                  * If we got an error of any sort, don't update!
1300                  */
1301                 fclose(fp);
1302         }
1303 }
1304