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 <sys/param.h>
  34 #include <sys/types.h>
  35
  36 #include <assert.h>
  37 #include <ctype.h>
  38 #include <dirent.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <grp.h>
  43 #include <pwd.h>
  44 #include <libutil.h>
  45 #include <login_cap.h>
  46 #include <paths.h>
  47 #include <string.h>
  48 #include <sysexits.h>
  49 #include <termios.h>
  50 #include <unistd.h>
  51
  52 #include "pw.h"
  53 #include "bitmap.h"
  54 #include "psdate.h"
  55
  56 #define LOGNAMESIZE (MAXLOGNAME-1)
  57
  58 static          char locked_str[] = "*LOCKED*";
  59
  60 static struct passwd fakeuser = {
  61         "nouser",
  62         "*",
  63         -1,
  64         -1,
  65         0,
  66         "",
  67         "User &",
  68         "/nonexistent",
  69         "/bin/sh",
  70         0,
  71         0
  72 };
  73
  74 static int       print_user(struct passwd *pwd, bool pretty, bool v7);
  75 static uid_t     pw_uidpolicy(struct userconf *cnf, intmax_t id);
  76 static uid_t     pw_gidpolicy(struct userconf *cnf, char *grname, char *nam,
  77     gid_t prefer, bool dryrun);
  78 static char     *pw_homepolicy(struct userconf * cnf, char *homedir,
  79     const char *user);
  80 static char     *pw_shellpolicy(struct userconf * cnf);
  81 static char     *pw_password(struct userconf * cnf, char const * user,
  82     bool dryrun);
  83 static char     *shell_path(char const * path, char *shells[], char *sh);
  84 static void     rmat(uid_t uid);
  85 static void     rmopie(char const * name);
  86
  87 static void
  88 mkdir_home_parents(int dfd, const char *dir)
  89 {
  90         struct stat st;
  91         char *dirs, *tmp;
  92
  93         if (*dir != '/')
  94                 errx(EX_DATAERR, "invalid base directory for home '%s'", dir);
  95
  96         dir++;
  97
  98         if (fstatat(dfd, dir, &st, 0) != -1) {
  99                 if (S_ISDIR(st.st_mode))
 100                         return;
 101                 errx(EX_OSFILE, "root home `/%s' is not a directory", dir);
 102         }
 103
 104         dirs = strdup(dir);
 105         if (dirs == NULL)
 106                 errx(EX_UNAVAILABLE, "out of memory");
 107
 108         tmp = strrchr(dirs, '/');
 109         if (tmp == NULL) {
 110                 free(dirs);
 111                 return;
 112         }
 113         tmp[0] = '\0';
 114
 115         /*
 116          * This is a kludge especially for Joerg :)
 117          * If the home directory would be created in the root partition, then
 118          * we really create it under /usr which is likely to have more space.
 119          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 120          */
 121         if (strchr(dirs, '/') == NULL) {
 122                 asprintf(&tmp, "usr/%s", dirs);
 123                 if (tmp == NULL)
 124                         errx(EX_UNAVAILABLE, "out of memory");
 125                 if (mkdirat(dfd, tmp, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 126                         fchownat(dfd, tmp, 0, 0, 0);
 127                         symlinkat(tmp, dfd, dirs);
 128                 }
 129                 free(tmp);
 130         }
 131         tmp = dirs;
 132         if (fstatat(dfd, dirs, &st, 0) == -1) {
 133                 while ((tmp = strchr(tmp + 1, '/')) != NULL) {
 134                         *tmp = '\0';
 135                         if (fstatat(dfd, dirs, &st, 0) == -1) {
 136                                 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
 137                                         err(EX_OSFILE,  "'%s' (root home parent) is not a directory", dirs);
 138                         }
 139                         *tmp = '/';
 140                 }
 141         }
 142         if (fstatat(dfd, dirs, &st, 0) == -1) {
 143                 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
 144                         err(EX_OSFILE,  "'%s' (root home parent) is not a directory", dirs);
 145                 fchownat(dfd, dirs, 0, 0, 0);
 146         }
 147
 148         free(dirs);
 149 }
 150
 151 static void
 152 create_and_populate_homedir(struct userconf *cnf, struct passwd *pwd,
 153     const char *skeldir, mode_t homemode, bool update)
 154 {
 155         int skelfd = -1;
 156
 157         /* Create home parents directories */
 158         mkdir_home_parents(conf.rootfd, pwd->pw_dir);
 159
 160         if (skeldir != NULL && *skeldir != '\0') {
 161                 if (*skeldir == '/')
 162                         skeldir++;
 163                 skelfd = openat(conf.rootfd, skeldir, O_DIRECTORY|O_CLOEXEC);
 164         }
 165
 166         copymkdir(conf.rootfd, pwd->pw_dir, skelfd, homemode, pwd->pw_uid,
 167             pwd->pw_gid, 0);
 168         pw_log(cnf, update ? M_UPDATE : M_ADD, W_USER, "%s(%ju) home %s made",
 169             pwd->pw_name, (uintmax_t)pwd->pw_uid, pwd->pw_dir);
 170 }
 171
 172 static int
 173 pw_set_passwd(struct passwd *pwd, int fd, bool precrypted, bool update)
 174 {
 175         int              b, istty;
 176         struct termios   t, n;
 177         login_cap_t     *lc;
 178         char            line[_PASSWORD_LEN+1];
 179         char            *p;
 180
 181         if (fd == '-') {
 182                 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 183                         pwd->pw_passwd = "*";   /* No access */
 184                         return (1);
 185                 }
 186                 return (0);
 187         }
 188
 189         if ((istty = isatty(fd))) {
 190                 if (tcgetattr(fd, &t) == -1)
 191                         istty = 0;
 192                 else {
 193                         n = t;
 194                         n.c_lflag &= ~(ECHO);
 195                         tcsetattr(fd, TCSANOW, &n);
 196                         printf("%s%spassword for user %s:",
 197                             update ? "new " : "",
 198                             precrypted ? "encrypted " : "",
 199                             pwd->pw_name);
 200                         fflush(stdout);
 201                 }
 202         }
 203         b = read(fd, line, sizeof(line) - 1);
 204         if (istty) {    /* Restore state */
 205                 tcsetattr(fd, TCSANOW, &t);
 206                 fputc('\n', stdout);
 207                 fflush(stdout);
 208         }
 209
 210         if (b < 0)
 211                 err(EX_IOERR, "-%c file descriptor",
 212                     precrypted ? 'H' : 'h');
 213         line[b] = '\0';
 214         if ((p = strpbrk(line, "\r\n")) != NULL)
 215                 *p = '\0';
 216         if (!*line)
 217                 errx(EX_DATAERR, "empty password read on file descriptor %d",
 218                     fd);
 219         if (precrypted) {
 220                 if (strchr(line, ':') != NULL)
 221                         errx(EX_DATAERR, "bad encrypted password");
 222                 pwd->pw_passwd = strdup(line);
 223         } else {
 224                 lc = login_getpwclass(pwd);
 225                 if (lc == NULL ||
 226                                 login_setcryptfmt(lc, "sha512", NULL) == NULL)
 227                         warn("setting crypt(3) format");
 228                 login_close(lc);
 229                 pwd->pw_passwd = pw_pwcrypt(line);
 230         }
 231         return (1);
 232 }
 233
 234 static void
 235 perform_chgpwent(const char *name, struct passwd *pwd, char *nispasswd)
 236 {
 237         int rc;
 238         struct passwd *nispwd;
 239
 240         /* duplicate for nis so that chgpwent is not modifying before NIS */
 241         if (nispasswd && *nispasswd == '/')
 242                 nispwd = pw_dup(pwd);
 243
 244         rc = chgpwent(name, pwd);
 245         if (rc == -1)
 246                 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name);
 247         else if (rc != 0)
 248                 err(EX_IOERR, "passwd file update");
 249
 250         if (nispasswd && *nispasswd == '/') {
 251                 rc = chgnispwent(nispasswd, name, nispwd);
 252                 if (rc == -1)
 253                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 254                 else if (rc != 0)
 255                         warn("NIS passwd update");
 256                 /* NOTE: NIS-only update errors are not fatal */
 257         }
 258 }
 259
 260 /*
 261  * The M_LOCK and M_UNLOCK functions simply add or remove
 262  * a "*LOCKED*" prefix from in front of the password to
 263  * prevent it decoding correctly, and therefore prevents
 264  * access. Of course, this only prevents access via
 265  * password authentication (not ssh, kerberos or any
 266  * other method that does not use the UNIX password) but
 267  * that is a known limitation.
 268  */
 269 static int
 270 pw_userlock(char *arg1, int mode)
 271 {
 272         struct passwd *pwd = NULL;
 273         char *passtmp = NULL;
 274         char *name;
 275         bool locked = false;
 276         uid_t id = (uid_t)-1;
 277
 278         if (geteuid() != 0)
 279                 errx(EX_NOPERM, "you must be root");
 280
 281         if (arg1 == NULL)
 282                 errx(EX_DATAERR, "username or id required");
 283
 284         name = arg1;
 285         if (arg1[strspn(name, "0123456789")] == '\0')
 286                 id = pw_checkid(name, UID_MAX);
 287
 288         pwd = GETPWNAM(pw_checkname(name, 0));
 289         if (pwd == NULL && id != (uid_t)-1) {
 290                 pwd = GETPWUID(id);
 291                 if (pwd != NULL)
 292                         name = pwd->pw_name;
 293         }
 294         if (pwd == NULL) {
 295                 if (id == (uid_t)-1)
 296                         errx(EX_NOUSER, "no such name or uid `%ju'", (uintmax_t) id);
 297                 errx(EX_NOUSER, "no such user `%s'", name);
 298         }
 299
 300         if (name == NULL)
 301                 name = pwd->pw_name;
 302
 303         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0)
 304                 locked = true;
 305         if (mode == M_LOCK && locked)
 306                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 307         if (mode == M_UNLOCK && !locked)
 308                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 309
 310         if (mode == M_LOCK) {
 311                 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
 312                 if (passtmp == NULL)    /* disaster */
 313                         errx(EX_UNAVAILABLE, "out of memory");
 314                 pwd->pw_passwd = passtmp;
 315         } else {
 316                 pwd->pw_passwd += sizeof(locked_str)-1;
 317         }
 318
 319         perform_chgpwent(name, pwd, NULL);
 320         free(passtmp);
 321
 322         return (EXIT_SUCCESS);
 323 }
 324
 325 static uid_t
 326 pw_uidpolicy(struct userconf * cnf, intmax_t id)
 327 {
 328         struct passwd  *pwd;
 329         struct bitmap   bm;
 330         uid_t           uid = (uid_t) - 1;
 331
 332         /*
 333          * Check the given uid, if any
 334          */
 335         if (id >= 0) {
 336                 uid = (uid_t) id;
 337
 338                 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate)
 339                         errx(EX_DATAERR, "uid `%ju' has already been allocated",
 340                             (uintmax_t)pwd->pw_uid);
 341                 return (uid);
 342         }
 343         /*
 344          * We need to allocate the next available uid under one of
 345          * two policies a) Grab the first unused uid b) Grab the
 346          * highest possible unused uid
 347          */
 348         if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 349                                                  * claus^H^H^H^Hheck */
 350                 cnf->min_uid = 1000;
 351                 cnf->max_uid = 32000;
 352         }
 353         bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 354
 355         /*
 356          * Now, let's fill the bitmap from the password file
 357          */
 358         SETPWENT();
 359         while ((pwd = GETPWENT()) != NULL)
 360                 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 361                         bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 362         ENDPWENT();
 363
 364         /*
 365          * Then apply the policy, with fallback to reuse if necessary
 366          */
 367         if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 368                 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 369
 370         /*
 371          * Another sanity check
 372          */
 373         if (uid < cnf->min_uid || uid > cnf->max_uid)
 374                 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 375         bm_dealloc(&bm);
 376         return (uid);
 377 }
 378
 379 static uid_t
 380 pw_gidpolicy(struct userconf *cnf, char *grname, char *nam, gid_t prefer, bool dryrun)
 381 {
 382         struct group   *grp;
 383         gid_t           gid = (uid_t) - 1;
 384
 385         /*
 386          * Check the given gid, if any
 387          */
 388         SETGRENT();
 389         if (grname) {
 390                 if ((grp = GETGRNAM(grname)) == NULL) {
 391                         gid = pw_checkid(grname, GID_MAX);
 392                         grp = GETGRGID(gid);
 393                 }
 394                 gid = grp->gr_gid;
 395         } else if ((grp = GETGRNAM(nam)) != NULL &&
 396             (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) {
 397                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 398         } else {
 399                 intmax_t                grid = -1;
 400
 401                 /*
 402                  * We need to auto-create a group with the user's name. We
 403                  * can send all the appropriate output to our sister routine
 404                  * bit first see if we can create a group with gid==uid so we
 405                  * can keep the user and group ids in sync. We purposely do
 406                  * NOT check the gid range if we can force the sync. If the
 407                  * user's name dups an existing group, then the group add
 408                  * function will happily handle that case for us and exit.
 409                  */
 410                 if (GETGRGID(prefer) == NULL)
 411                         grid = prefer;
 412                 if (dryrun) {
 413                         gid = pw_groupnext(cnf, true);
 414                 } else {
 415                         if (grid == -1)
 416                                 grid =  pw_groupnext(cnf, true);
 417                         groupadd(cnf, nam, grid, NULL, -1, false, false, false);
 418                         if ((grp = GETGRNAM(nam)) != NULL)
 419                                 gid = grp->gr_gid;
 420                 }
 421         }
 422         ENDGRENT();
 423         return (gid);
 424 }
 425
 426 static char *
 427 pw_homepolicy(struct userconf * cnf, char *homedir, const char *user)
 428 {
 429         static char     home[128];
 430
 431         if (homedir)
 432                 return (homedir);
 433
 434         if (cnf->home == NULL || *cnf->home == '\0')
 435                 errx(EX_CONFIG, "no base home directory set");
 436         snprintf(home, sizeof(home), "%s/%s", cnf->home, user);
 437
 438         return (home);
 439 }
 440
 441 static char *
 442 shell_path(char const * path, char *shells[], char *sh)
 443 {
 444         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 445                 return sh;      /* specified full path or forced none */
 446         else {
 447                 char           *p;
 448                 char            paths[_UC_MAXLINE];
 449
 450                 /*
 451                  * We need to search paths
 452                  */
 453                 strlcpy(paths, path, sizeof(paths));
 454                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 455                         int             i;
 456                         static char     shellpath[256];
 457
 458                         if (sh != NULL) {
 459                                 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
 460                                 if (access(shellpath, X_OK) == 0)
 461                                         return shellpath;
 462                         } else
 463                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
 464                                         snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]);
 465                                         if (access(shellpath, X_OK) == 0)
 466                                                 return shellpath;
 467                                 }
 468                 }
 469                 if (sh == NULL)
 470                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
 471                 errx(EX_CONFIG, "no default shell available or defined");
 472                 return NULL;
 473         }
 474 }
 475
 476 static char *
 477 pw_shellpolicy(struct userconf * cnf)
 478 {
 479
 480         return shell_path(cnf->shelldir, cnf->shells, cnf->shell_default);
 481 }
 482
 483 #define SALTSIZE        32
 484
 485 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
 486
 487 char *
 488 pw_pwcrypt(char *password)
 489 {
 490         int             i;
 491         char            salt[SALTSIZE + 1];
 492         char            *cryptpw;
 493         static char     buf[256];
 494         size_t          pwlen;
 495
 496         /*
 497          * Calculate a salt value
 498          */
 499         for (i = 0; i < SALTSIZE; i++)
 500                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
 501         salt[SALTSIZE] = '\0';
 502
 503         cryptpw = crypt(password, salt);
 504         if (cryptpw == NULL)
 505                 errx(EX_CONFIG, "crypt(3) failure");
 506         pwlen = strlcpy(buf, cryptpw, sizeof(buf));
 507         assert(pwlen < sizeof(buf));
 508         return (buf);
 509 }
 510
 511 static char *
 512 pw_password(struct userconf * cnf, char const * user, bool dryrun)
 513 {
 514         int             i, l;
 515         char            pwbuf[32];
 516
 517         switch (cnf->default_password) {
 518         case -1:                /* Random password */
 519                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
 520                 for (i = 0; i < l; i++)
 521                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
 522                 pwbuf[i] = '\0';
 523
 524                 /*
 525                  * We give this information back to the user
 526                  */
 527                 if (conf.fd == -1 && !dryrun) {
 528                         if (isatty(STDOUT_FILENO))
 529                                 printf("Password for '%s' is: ", user);
 530                         printf("%s\n", pwbuf);
 531                         fflush(stdout);
 532                 }
 533                 break;
 534
 535         case -2:                /* No password at all! */
 536                 return "";
 537
 538         case 0:         /* No login - default */
 539         default:
 540                 return "*";
 541
 542         case 1:         /* user's name */
 543                 strlcpy(pwbuf, user, sizeof(pwbuf));
 544                 break;
 545         }
 546         return pw_pwcrypt(pwbuf);
 547 }
 548
 549 static int
 550 print_user(struct passwd * pwd, bool pretty, bool v7)
 551 {
 552         int             j;
 553         char           *p;
 554         struct group   *grp = GETGRGID(pwd->pw_gid);
 555         char            uname[60] = "User &", office[60] = "[None]",
 556                         wphone[60] = "[None]", hphone[60] = "[None]";
 557         char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
 558         struct tm *    tptr;
 559
 560         if (!pretty) {
 561                 p = v7 ? pw_make_v7(pwd) : pw_make(pwd);
 562                 printf("%s\n", p);
 563                 free(p);
 564                 return (EXIT_SUCCESS);
 565         }
 566
 567         if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
 568                 strlcpy(uname, p, sizeof(uname));
 569                 if ((p = strtok(NULL, ",")) != NULL) {
 570                         strlcpy(office, p, sizeof(office));
 571                         if ((p = strtok(NULL, ",")) != NULL) {
 572                                 strlcpy(wphone, p, sizeof(wphone));
 573                                 if ((p = strtok(NULL, "")) != NULL) {
 574                                         strlcpy(hphone, p, sizeof(hphone));
 575                                 }
 576                         }
 577                 }
 578         }
 579         /*
 580          * Handle '&' in gecos field
 581          */
 582         if ((p = strchr(uname, '&')) != NULL) {
 583                 int             l = strlen(pwd->pw_name);
 584                 int             m = strlen(p);
 585
 586                 memmove(p + l, p + 1, m);
 587                 memmove(p, pwd->pw_name, l);
 588                 *p = (char) toupper((unsigned char)*p);
 589         }
 590         if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
 591                 strftime(acexpire, sizeof acexpire, "%c", tptr);
 592                 if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
 593                 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
 594         printf("Login Name: %-15s   #%-12ju Group: %-15s   #%ju\n"
 595                " Full Name: %s\n"
 596                "      Home: %-26.26s      Class: %s\n"
 597                "     Shell: %-26.26s     Office: %s\n"
 598                "Work Phone: %-26.26s Home Phone: %s\n"
 599                "Acc Expire: %-26.26s Pwd Expire: %s\n",
 600                pwd->pw_name, (uintmax_t)pwd->pw_uid,
 601                grp ? grp->gr_name : "(invalid)", (uintmax_t)pwd->pw_gid,
 602                uname, pwd->pw_dir, pwd->pw_class,
 603                pwd->pw_shell, office, wphone, hphone,
 604                acexpire, pwexpire);
 605         SETGRENT();
 606         j = 0;
 607         while ((grp=GETGRENT()) != NULL) {
 608                 int     i = 0;
 609                 if (grp->gr_mem != NULL) {
 610                         while (grp->gr_mem[i] != NULL) {
 611                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) {
 612                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
 613                                         break;
 614                                 }
 615                                 ++i;
 616                         }
 617                 }
 618         }
 619         ENDGRENT();
 620         printf("%s", j ? "\n" : "");
 621         return (EXIT_SUCCESS);
 622 }
 623
 624 char *
 625 pw_checkname(char *name, int gecos)
 626 {
 627         char showch[8];
 628         const char *badchars, *ch, *showtype;
 629         int reject;
 630
 631         ch = name;
 632         reject = 0;
 633         if (gecos) {
 634                 /* See if the name is valid as a gecos (comment) field. */
 635                 badchars = ":!@";
 636                 showtype = "gecos field";
 637         } else {
 638                 /* See if the name is valid as a userid or group. */
 639                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
 640                 showtype = "userid/group name";
 641                 /* Userids and groups can not have a leading '-'. */
 642                 if (*ch == '-')
 643                         reject = 1;
 644         }
 645         if (!reject) {
 646                 while (*ch) {
 647                         if (strchr(badchars, *ch) != NULL ||
 648                             (!gecos && *ch < ' ') ||
 649                             *ch == 127) {
 650                                 reject = 1;
 651                                 break;
 652                         }
 653                         /* 8-bit characters are only allowed in GECOS fields */
 654                         if (!gecos && (*ch & 0x80)) {
 655                                 reject = 1;
 656                                 break;
 657                         }
 658                         ch++;
 659                 }
 660         }
 661         /*
 662          * A `$' is allowed as the final character for userids and groups,
 663          * mainly for the benefit of samba.
 664          */
 665         if (reject && !gecos) {
 666                 if (*ch == '$' && *(ch + 1) == '\0') {
 667                         reject = 0;
 668                         ch++;
 669                 }
 670         }
 671         if (reject) {
 672                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
 673                     ? "`%c'" : "0x%02x", *ch);
 674                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
 675                     showch, (ch - name), showtype);
 676         }
 677         if (!gecos && (ch - name) > LOGNAMESIZE)
 678                 errx(EX_USAGE, "name too long `%s' (max is %d)", name,
 679                     LOGNAMESIZE);
 680
 681         return (name);
 682 }
 683
 684 static void
 685 rmat(uid_t uid)
 686 {
 687         DIR            *d = opendir("/var/at/jobs");
 688
 689         if (d != NULL) {
 690                 struct dirent  *e;
 691
 692                 while ((e = readdir(d)) != NULL) {
 693                         struct stat     st;
 694
 695                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
 696                             stat(e->d_name, &st) == 0 &&
 697                             !S_ISDIR(st.st_mode) &&
 698                             st.st_uid == uid) {
 699                                 char            tmp[MAXPATHLEN];
 700
 701                                 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s",
 702                                     e->d_name);
 703                                 system(tmp);
 704                         }
 705                 }
 706                 closedir(d);
 707         }
 708 }
 709
 710 static void
 711 rmopie(char const * name)
 712 {
 713         char tmp[1014];
 714         FILE *fp;
 715         int fd;
 716         size_t len;
 717         off_t   atofs = 0;
 718
 719         if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1)
 720                 return;
 721
 722         fp = fdopen(fd, "r+");
 723         len = strlen(name);
 724
 725         while (fgets(tmp, sizeof(tmp), fp) != NULL) {
 726                 if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') {
 727                         /* Comment username out */
 728                         if (fseek(fp, atofs, SEEK_SET) == 0)
 729                                 fwrite("#", 1, 1, fp);
 730                         break;
 731                 }
 732                 atofs = ftell(fp);
 733         }
 734         /*
 735          * If we got an error of any sort, don't update!
 736          */
 737         fclose(fp);
 738 }
 739
 740 int
 741 pw_user_next(int argc, char **argv, char *name __unused)
 742 {
 743         struct userconf *cnf = NULL;
 744         const char *cfg = NULL;
 745         int ch;
 746         bool quiet = false;
 747         uid_t next;
 748
 749         while ((ch = getopt(argc, argv, "C:q")) != -1) {
 750                 switch (ch) {
 751                 case 'C':
 752                         cfg = optarg;
 753                         break;
 754                 case 'q':
 755                         quiet = true;
 756                         break;
 757                 }
 758         }
 759
 760         if (quiet)
 761                 freopen(_PATH_DEVNULL, "w", stderr);
 762
 763         cnf = get_userconfig(cfg);
 764
 765         next = pw_uidpolicy(cnf, -1);
 766
 767         printf("%ju:", (uintmax_t)next);
 768         pw_groupnext(cnf, quiet);
 769
 770         return (EXIT_SUCCESS);
 771 }
 772
 773 int
 774 pw_user_show(int argc, char **argv, char *arg1)
 775 {
 776         struct passwd *pwd = NULL;
 777         char *name = NULL;
 778         intmax_t id = -1;
 779         int ch;
 780         bool all = false;
 781         bool pretty = false;
 782         bool force = false;
 783         bool v7 = false;
 784         bool quiet = false;
 785
 786         if (arg1 != NULL) {
 787                 if (arg1[strspn(arg1, "0123456789")] == '\0')
 788                         id = pw_checkid(arg1, UID_MAX);
 789                 else
 790                         name = arg1;
 791         }
 792
 793         while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) {
 794                 switch (ch) {
 795                 case 'C':
 796                         /* ignore compatibility */
 797                         break;
 798                 case 'q':
 799                         quiet = true;
 800                         break;
 801                 case 'n':
 802                         name = optarg;
 803                         break;
 804                 case 'u':
 805                         id = pw_checkid(optarg, UID_MAX);
 806                         break;
 807                 case 'F':
 808                         force = true;
 809                         break;
 810                 case 'P':
 811                         pretty = true;
 812                         break;
 813                 case 'a':
 814                         all = true;
 815                         break;
 816                 case '7':
 817                         v7 = true;
 818                         break;
 819                 }
 820         }
 821
 822         if (quiet)
 823                 freopen(_PATH_DEVNULL, "w", stderr);
 824
 825         if (all) {
 826                 SETPWENT();
 827                 while ((pwd = GETPWENT()) != NULL)
 828                         print_user(pwd, pretty, v7);
 829                 ENDPWENT();
 830                 return (EXIT_SUCCESS);
 831         }
 832
 833         if (id < 0 && name == NULL)
 834                 errx(EX_DATAERR, "username or id required");
 835
 836         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
 837         if (pwd == NULL) {
 838                 if (force) {
 839                         pwd = &fakeuser;
 840                 } else {
 841                         if (name == NULL)
 842                                 errx(EX_NOUSER, "no such uid `%ju'",
 843                                     (uintmax_t) id);
 844                         errx(EX_NOUSER, "no such user `%s'", name);
 845                 }
 846         }
 847
 848         return (print_user(pwd, pretty, v7));
 849 }
 850
 851 int
 852 pw_user_del(int argc, char **argv, char *arg1)
 853 {
 854         struct userconf *cnf = NULL;
 855         struct passwd *pwd = NULL;
 856         struct group *gr, *grp;
 857         char *name = NULL;
 858         char grname[MAXLOGNAME];
 859         char *nispasswd = NULL;
 860         char file[MAXPATHLEN];
 861         char home[MAXPATHLEN];
 862         const char *cfg = NULL;
 863         struct stat st;
 864         intmax_t id = -1;
 865         int ch, rc;
 866         bool nis = false;
 867         bool deletehome = false;
 868         bool quiet = false;
 869
 870         if (arg1 != NULL) {
 871                 if (arg1[strspn(arg1, "0123456789")] == '\0')
 872                         id = pw_checkid(arg1, UID_MAX);
 873                 else
 874                         name = arg1;
 875         }
 876
 877         while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) {
 878                 switch (ch) {
 879                 case 'C':
 880                         cfg = optarg;
 881                         break;
 882                 case 'q':
 883                         quiet = true;
 884                         break;
 885                 case 'n':
 886                         name = optarg;
 887                         break;
 888                 case 'u':
 889                         id = pw_checkid(optarg, UID_MAX);
 890                         break;
 891                 case 'r':
 892                         deletehome = true;
 893                         break;
 894                 case 'y':
 895                         nispasswd = optarg;
 896                         break;
 897                 case 'Y':
 898                         nis = true;
 899                         break;
 900                 }
 901         }
 902
 903         if (quiet)
 904                 freopen(_PATH_DEVNULL, "w", stderr);
 905
 906         if (id < 0 && name == NULL)
 907                 errx(EX_DATAERR, "username or id required");
 908
 909         cnf = get_userconfig(cfg);
 910
 911         if (nispasswd == NULL)
 912                 nispasswd = cnf->nispasswd;
 913
 914         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
 915         if (pwd == NULL) {
 916                 if (name == NULL)
 917                         errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id);
 918                 errx(EX_NOUSER, "no such user `%s'", name);
 919         }
 920
 921         if (PWF._altdir == PWF_REGULAR &&
 922             ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
 923                 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
 924                         if (!nis && nispasswd && *nispasswd != '/')
 925                                 errx(EX_NOUSER, "Cannot remove NIS user `%s'",
 926                                     name);
 927                 } else {
 928                         errx(EX_NOUSER, "Cannot remove non local user `%s'",
 929                             name);
 930                 }
 931         }
 932
 933         id = pwd->pw_uid;
 934         if (name == NULL)
 935                 name = pwd->pw_name;
 936
 937         if (strcmp(pwd->pw_name, "root") == 0)
 938                 errx(EX_DATAERR, "cannot remove user 'root'");
 939
 940         /* Remove opie record from /etc/opiekeys */
 941         if (PWALTDIR() != PWF_ALT)
 942                 rmopie(pwd->pw_name);
 943
 944         if (!PWALTDIR()) {
 945                 /* Remove crontabs */
 946                 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
 947                 if (access(file, F_OK) == 0) {
 948                         snprintf(file, sizeof(file), "crontab -u %s -r",
 949                             pwd->pw_name);
 950                         system(file);
 951                 }
 952         }
 953
 954         /*
 955          * Save these for later, since contents of pwd may be
 956          * invalidated by deletion
 957          */
 958         snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 959         strlcpy(home, pwd->pw_dir, sizeof(home));
 960         gr = GETGRGID(pwd->pw_gid);
 961         if (gr != NULL)
 962                 strlcpy(grname, gr->gr_name, LOGNAMESIZE);
 963         else
 964                 grname[0] = '\0';
 965
 966         rc = delpwent(pwd);
 967         if (rc == -1)
 968                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 969         else if (rc != 0)
 970                 err(EX_IOERR, "passwd update");
 971
 972         if (nis && nispasswd && *nispasswd=='/') {
 973                 rc = delnispwent(nispasswd, name);
 974                 if (rc == -1)
 975                         warnx("WARNING: user '%s' does not exist in NIS passwd",
 976                             pwd->pw_name);
 977                 else if (rc != 0)
 978                         warn("WARNING: NIS passwd update");
 979         }
 980
 981         grp = GETGRNAM(name);
 982         if (grp != NULL &&
 983             (grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
 984             strcmp(name, grname) == 0)
 985                 delgrent(GETGRNAM(name));
 986         SETGRENT();
 987         while ((grp = GETGRENT()) != NULL) {
 988                 int i, j;
 989                 char group[MAXLOGNAME];
 990                 if (grp->gr_mem == NULL)
 991                         continue;
 992
 993                 for (i = 0; grp->gr_mem[i] != NULL; i++) {
 994                         if (strcmp(grp->gr_mem[i], name) != 0)
 995                                 continue;
 996
 997                         for (j = i; grp->gr_mem[j] != NULL; j++)
 998                                 grp->gr_mem[j] = grp->gr_mem[j+1];
 999                         strlcpy(group, grp->gr_name, MAXLOGNAME);
1000                         chggrent(group, grp);
1001                 }
1002         }
1003         ENDGRENT();
1004
1005         pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name,
1006             (uintmax_t)id);
1007
1008         /* Remove mail file */
1009         if (PWALTDIR() != PWF_ALT)
1010                 unlinkat(conf.rootfd, file + 1, 0);
1011
1012         /* Remove at jobs */
1013         if (!PWALTDIR() && getpwuid(id) == NULL)
1014                 rmat(id);
1015
1016         /* Remove home directory and contents */
1017         if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' &&
1018             GETPWUID(id) == NULL &&
1019             fstatat(conf.rootfd, home + 1, &st, 0) != -1) {
1020                 rm_r(conf.rootfd, home, id);
1021                 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s"
1022                     "removed", name, (uintmax_t)id, home,
1023                      fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not "
1024                      "completely ");
1025         }
1026
1027         return (EXIT_SUCCESS);
1028 }
1029
1030 int
1031 pw_user_lock(int argc, char **argv, char *arg1)
1032 {
1033         int ch;
1034
1035         while ((ch = getopt(argc, argv, "Cq")) != -1) {
1036                 switch (ch) {
1037                 case 'C':
1038                 case 'q':
1039                         /* compatibility */
1040                         break;
1041                 }
1042         }
1043
1044         return (pw_userlock(arg1, M_LOCK));
1045 }
1046
1047 int
1048 pw_user_unlock(int argc, char **argv, char *arg1)
1049 {
1050         int ch;
1051
1052         while ((ch = getopt(argc, argv, "Cq")) != -1) {
1053                 switch (ch) {
1054                 case 'C':
1055                 case 'q':
1056                         /* compatibility */
1057                         break;
1058                 }
1059         }
1060
1061         return (pw_userlock(arg1, M_UNLOCK));
1062 }
1063
1064 static struct group *
1065 group_from_name_or_id(char *name)
1066 {
1067         const char *errstr = NULL;
1068         struct group *grp;
1069         uintmax_t id;
1070
1071         if ((grp = GETGRNAM(name)) == NULL) {
1072                 id = strtounum(name, 0, GID_MAX, &errstr);
1073                 if (errstr)
1074                         errx(EX_NOUSER, "group `%s' does not exist", name);
1075                 grp = GETGRGID(id);
1076                 if (grp == NULL)
1077                         errx(EX_NOUSER, "group `%s' does not exist", name);
1078         }
1079
1080         return (grp);
1081 }
1082
1083 static void
1084 split_groups(StringList **groups, char *groupsstr)
1085 {
1086         struct group *grp;
1087         char *p;
1088         char tok[] = ", \t";
1089
1090         for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) {
1091                 grp = group_from_name_or_id(p);
1092                 if (*groups == NULL)
1093                         *groups = sl_init();
1094                 sl_add(*groups, newstr(grp->gr_name));
1095         }
1096 }
1097
1098 static void
1099 validate_grname(struct userconf *cnf, char *group)
1100 {
1101         struct group *grp;
1102
1103         if (group == NULL || *group == '\0') {
1104                 cnf->default_group = "";
1105                 return;
1106         }
1107         grp = group_from_name_or_id(group);
1108         cnf->default_group = newstr(grp->gr_name);
1109 }
1110
1111 static mode_t
1112 validate_mode(char *mode)
1113 {
1114         mode_t m;
1115         void *set;
1116
1117         if ((set = setmode(mode)) == NULL)
1118                 errx(EX_DATAERR, "invalid directory creation mode '%s'", mode);
1119
1120         m = getmode(set, _DEF_DIRMODE);
1121         free(set);
1122         return (m);
1123 }
1124
1125 static void
1126 mix_config(struct userconf *cmdcnf, struct userconf *cfg)
1127 {
1128
1129         if (cmdcnf->default_password == 0)
1130                 cmdcnf->default_password = cfg->default_password;
1131         if (cmdcnf->reuse_uids == 0)
1132                 cmdcnf->reuse_uids = cfg->reuse_uids;
1133         if (cmdcnf->reuse_gids == 0)
1134                 cmdcnf->reuse_gids = cfg->reuse_gids;
1135         if (cmdcnf->nispasswd == NULL)
1136                 cmdcnf->nispasswd = cfg->nispasswd;
1137         if (cmdcnf->dotdir == NULL)
1138                 cmdcnf->dotdir = cfg->dotdir;
1139         if (cmdcnf->newmail == NULL)
1140                 cmdcnf->newmail = cfg->newmail;
1141         if (cmdcnf->logfile == NULL)
1142                 cmdcnf->logfile = cfg->logfile;
1143         if (cmdcnf->home == NULL)
1144                 cmdcnf->home = cfg->home;
1145         if (cmdcnf->homemode == 0)
1146                 cmdcnf->homemode = cfg->homemode;
1147         if (cmdcnf->shelldir == NULL)
1148                 cmdcnf->shelldir = cfg->shelldir;
1149         if (cmdcnf->shells == NULL)
1150                 cmdcnf->shells = cfg->shells;
1151         if (cmdcnf->shell_default == NULL)
1152                 cmdcnf->shell_default = cfg->shell_default;
1153         if (cmdcnf->default_group == NULL)
1154                 cmdcnf->default_group = cfg->default_group;
1155         if (cmdcnf->groups == NULL)
1156                 cmdcnf->groups = cfg->groups;
1157         if (cmdcnf->default_class == NULL)
1158                 cmdcnf->default_class = cfg->default_class;
1159         if (cmdcnf->min_uid == 0)
1160                 cmdcnf->min_uid = cfg->min_uid;
1161         if (cmdcnf->max_uid == 0)
1162                 cmdcnf->max_uid = cfg->max_uid;
1163         if (cmdcnf->min_gid == 0)
1164                 cmdcnf->min_gid = cfg->min_gid;
1165         if (cmdcnf->max_gid == 0)
1166                 cmdcnf->max_gid = cfg->max_gid;
1167         if (cmdcnf->expire_days == 0)
1168                 cmdcnf->expire_days = cfg->expire_days;
1169         if (cmdcnf->password_days == 0)
1170                 cmdcnf->password_days = cfg->password_days;
1171 }
1172
1173 int
1174 pw_user_add(int argc, char **argv, char *arg1)
1175 {
1176         struct userconf *cnf, *cmdcnf;
1177         struct passwd *pwd;
1178         struct group *grp;
1179         struct stat st;
1180         char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y";
1181         char line[_PASSWORD_LEN+1], path[MAXPATHLEN];
1182         char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname;
1183         char *default_passwd, *name, *p;
1184         const char *cfg = NULL;
1185         login_cap_t *lc;
1186         FILE *pfp, *fp;
1187         intmax_t id = -1;
1188         time_t now;
1189         int rc, ch, fd = -1;
1190         size_t i;
1191         bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf;
1192
1193         dryrun = nis = pretty = quiet = createhome = precrypted = false;
1194         genconf = false;
1195         gecos = homedir = skel = userid = groupid = default_passwd = NULL;
1196         grname = name = NULL;
1197
1198         if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL)
1199                 err(EXIT_FAILURE, "calloc()");
1200
1201         if (arg1 != NULL) {
1202                 if (arg1[strspn(arg1, "0123456789")] == '\0')
1203                         id = pw_checkid(arg1, UID_MAX);
1204                 else
1205                         name = arg1;
1206         }
1207
1208         while ((ch = getopt(argc, argv, args)) != -1) {
1209                 switch (ch) {
1210                 case 'C':
1211                         cfg = optarg;
1212                         break;
1213                 case 'q':
1214                         quiet = true;
1215                         break;
1216                 case 'n':
1217                         name = optarg;
1218                         break;
1219                 case 'u':
1220                         userid = optarg;
1221                         break;
1222                 case 'c':
1223                         gecos = pw_checkname(optarg, 1);
1224                         break;
1225                 case 'd':
1226                         homedir = optarg;
1227                         break;
1228                 case 'e':
1229                         now = time(NULL);
1230                         cmdcnf->expire_days = parse_date(now, optarg);
1231                         break;
1232                 case 'p':
1233                         now = time(NULL);
1234                         cmdcnf->password_days = parse_date(now, optarg);
1235                         break;
1236                 case 'g':
1237                         validate_grname(cmdcnf, optarg);
1238                         grname = optarg;
1239                         break;
1240                 case 'G':
1241                         split_groups(&cmdcnf->groups, optarg);
1242                         break;
1243                 case 'm':
1244                         createhome = true;
1245                         break;
1246                 case 'M':
1247                         cmdcnf->homemode = validate_mode(optarg);
1248                         break;
1249                 case 'k':
1250                         walk = skel = optarg;
1251                         if (*walk == '/')
1252                                 walk++;
1253                         if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1254                                 errx(EX_OSFILE, "skeleton `%s' does not "
1255                                     "exists", skel);
1256                         if (!S_ISDIR(st.st_mode))
1257                                 errx(EX_OSFILE, "skeleton `%s' is not a "
1258                                     "directory", skel);
1259                         cmdcnf->dotdir = skel;
1260                         break;
1261                 case 's':
1262                         cmdcnf->shell_default = optarg;
1263                         break;
1264                 case 'o':
1265                         conf.checkduplicate = false;
1266                         break;
1267                 case 'L':
1268                         cmdcnf->default_class = pw_checkname(optarg, 0);
1269                         break;
1270                 case 'i':
1271                         groupid = optarg;
1272                         break;
1273                 case 'w':
1274                         default_passwd = optarg;
1275                         break;
1276                 case 'H':
1277                         if (fd != -1)
1278                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1279                                     "exclusive options");
1280                         fd = pw_checkfd(optarg);
1281                         precrypted = true;
1282                         if (fd == '-')
1283                                 errx(EX_USAGE, "-H expects a file descriptor");
1284                         break;
1285                 case 'h':
1286                         if (fd != -1)
1287                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1288                                     "exclusive options");
1289                         fd = pw_checkfd(optarg);
1290                         break;
1291                 case 'D':
1292                         genconf = true;
1293                         break;
1294                 case 'b':
1295                         cmdcnf->home = optarg;
1296                         break;
1297                 case 'N':
1298                         dryrun = true;
1299                         break;
1300                 case 'P':
1301                         pretty = true;
1302                         break;
1303                 case 'y':
1304                         cmdcnf->nispasswd = optarg;
1305                         break;
1306                 case 'Y':
1307                         nis = true;
1308                         break;
1309                 }
1310         }
1311
1312         if (geteuid() != 0 && ! dryrun)
1313                 errx(EX_NOPERM, "you must be root");
1314
1315         if (quiet)
1316                 freopen(_PATH_DEVNULL, "w", stderr);
1317
1318         cnf = get_userconfig(cfg);
1319
1320         mix_config(cmdcnf, cnf);
1321         if (default_passwd)
1322                 cmdcnf->default_password = passwd_val(default_passwd,
1323                     cnf->default_password);
1324         if (genconf) {
1325                 if (name != NULL)
1326                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
1327                 if (userid != NULL) {
1328                         if ((p = strtok(userid, ", \t")) != NULL)
1329                                 cmdcnf->min_uid = pw_checkid(p, UID_MAX);
1330                         if (cmdcnf->min_uid == 0)
1331                                 cmdcnf->min_uid = 1000;
1332                         if ((p = strtok(NULL, " ,\t")) != NULL)
1333                                 cmdcnf->max_uid = pw_checkid(p, UID_MAX);
1334                         if (cmdcnf->max_uid == 0)
1335                                 cmdcnf->max_uid = 32000;
1336                 }
1337                 if (groupid != NULL) {
1338                         if ((p = strtok(groupid, ", \t")) != NULL)
1339                                 cmdcnf->min_gid = pw_checkid(p, GID_MAX);
1340                         if (cmdcnf->min_gid == 0)
1341                                 cmdcnf->min_gid = 1000;
1342                         if ((p = strtok(NULL, " ,\t")) != NULL)
1343                                 cmdcnf->max_gid = pw_checkid(p, GID_MAX);
1344                         if (cmdcnf->max_gid == 0)
1345                                 cmdcnf->max_gid = 32000;
1346                 }
1347                 if (write_userconfig(cmdcnf, cfg))
1348                         return (EXIT_SUCCESS);
1349                 err(EX_IOERR, "config update");
1350         }
1351
1352         if (userid)
1353                 id = pw_checkid(userid, UID_MAX);
1354         if (id < 0 && name == NULL)
1355                 errx(EX_DATAERR, "user name or id required");
1356
1357         if (name == NULL)
1358                 errx(EX_DATAERR, "login name required");
1359
1360         if (GETPWNAM(name) != NULL)
1361                 errx(EX_DATAERR, "login name `%s' already exists", name);
1362
1363         if (!grname)
1364                 grname = cmdcnf->default_group;
1365
1366         pwd = &fakeuser;
1367         pwd->pw_name = name;
1368         pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : "";
1369         pwd->pw_uid = pw_uidpolicy(cmdcnf, id);
1370         pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name,
1371             (gid_t) pwd->pw_uid, dryrun);
1372         pwd->pw_change = cmdcnf->password_days;
1373         pwd->pw_expire = cmdcnf->expire_days;
1374         pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name);
1375         pwd->pw_shell = pw_shellpolicy(cmdcnf);
1376         lc = login_getpwclass(pwd);
1377         if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1378                 warn("setting crypt(3) format");
1379         login_close(lc);
1380         pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name, dryrun);
1381         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1382                 warnx("WARNING: new account `%s' has a uid of 0 "
1383                     "(superuser access!)", pwd->pw_name);
1384         if (gecos)
1385                 pwd->pw_gecos = gecos;
1386
1387         if (fd != -1)
1388                 pw_set_passwd(pwd, fd, precrypted, false);
1389
1390         if (dryrun)
1391                 return (print_user(pwd, pretty, false));
1392
1393         if ((rc = addpwent(pwd)) != 0) {
1394                 if (rc == -1)
1395                         errx(EX_IOERR, "user '%s' already exists",
1396                             pwd->pw_name);
1397                 else if (rc != 0)
1398                         err(EX_IOERR, "passwd file update");
1399         }
1400         if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') {
1401                 printf("%s\n", cmdcnf->nispasswd);
1402                 rc = addnispwent(cmdcnf->nispasswd, pwd);
1403                 if (rc == -1)
1404                         warnx("User '%s' already exists in NIS passwd",
1405                             pwd->pw_name);
1406                 else if (rc != 0)
1407                         warn("NIS passwd update");
1408                 /* NOTE: we treat NIS-only update errors as non-fatal */
1409         }
1410
1411         if (cmdcnf->groups != NULL) {
1412                 for (i = 0; i < cmdcnf->groups->sl_cur; i++) {
1413                         grp = GETGRNAM(cmdcnf->groups->sl_str[i]);
1414                         grp = gr_add(grp, pwd->pw_name);
1415                         /*
1416                          * grp can only be NULL in 2 cases:
1417                          * - the new member is already a member
1418                          * - a problem with memory occurs
1419                          * in both cases we want to skip now.
1420                          */
1421                         if (grp == NULL)
1422                                 continue;
1423                         chggrent(grp->gr_name, grp);
1424                         free(grp);
1425                 }
1426         }
1427
1428         pwd = GETPWNAM(name);
1429         if (pwd == NULL)
1430                 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1431
1432         grp = GETGRGID(pwd->pw_gid);
1433         pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1434                pwd->pw_name, (uintmax_t)pwd->pw_uid,
1435             grp ? grp->gr_name : "unknown",
1436                (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1437                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1438
1439         /*
1440          * let's touch and chown the user's mail file. This is not
1441          * strictly necessary under BSD with a 0755 maildir but it also
1442          * doesn't hurt anything to create the empty mailfile
1443          */
1444         if (PWALTDIR() != PWF_ALT) {
1445                 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR,
1446                     pwd->pw_name);
1447                 /* Preserve contents & mtime */
1448                 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600));
1449                 fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid,
1450                     AT_SYMLINK_NOFOLLOW);
1451         }
1452
1453         /*
1454          * Let's create and populate the user's home directory. Note
1455          * that this also `works' for editing users if -m is used, but
1456          * existing files will *not* be overwritten.
1457          */
1458         if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1459             *pwd->pw_dir == '/' && pwd->pw_dir[1])
1460                 create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir,
1461                     cmdcnf->homemode, false);
1462
1463         if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail &&
1464             (fp = fopen(cnf->newmail, "r")) != NULL) {
1465                 if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == NULL)
1466                         warn("sendmail");
1467                 else {
1468                         fprintf(pfp, "From: root\n" "To: %s\n"
1469                             "Subject: Welcome!\n\n", pwd->pw_name);
1470                         while (fgets(line, sizeof(line), fp) != NULL) {
1471                                 /* Do substitutions? */
1472                                 fputs(line, pfp);
1473                         }
1474                         pclose(pfp);
1475                         pw_log(cnf, M_ADD, W_USER, "%s(%ju) new user mail sent",
1476                             pwd->pw_name, (uintmax_t)pwd->pw_uid);
1477                 }
1478                 fclose(fp);
1479         }
1480
1481         if (nis && nis_update() == 0)
1482                 pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
1483
1484         return (EXIT_SUCCESS);
1485 }
1486
1487 int
1488 pw_user_mod(int argc, char **argv, char *arg1)
1489 {
1490         struct userconf *cnf;
1491         struct passwd *pwd;
1492         struct group *grp;
1493         StringList *groups = NULL;
1494         char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:";
1495         const char *cfg = NULL;
1496         char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell;
1497         char *passwd, *class, *nispasswd;
1498         login_cap_t *lc;
1499         struct stat st;
1500         intmax_t id = -1;
1501         int ch, fd = -1;
1502         size_t i, j;
1503         bool quiet, createhome, pretty, dryrun, nis, edited;
1504         bool precrypted;
1505         mode_t homemode = 0;
1506         time_t expire_days, password_days, now;
1507
1508         expire_days = password_days = -1;
1509         gecos = homedir = grname = name = newname = skel = shell =NULL;
1510         passwd = NULL;
1511         class = nispasswd = NULL;
1512         quiet = createhome = pretty = dryrun = nis = precrypted = false;
1513         edited = false;
1514
1515         if (arg1 != NULL) {
1516                 if (arg1[strspn(arg1, "0123456789")] == '\0')
1517                         id = pw_checkid(arg1, UID_MAX);
1518                 else
1519                         name = arg1;
1520         }
1521
1522         while ((ch = getopt(argc, argv, args)) != -1) {
1523                 switch (ch) {
1524                 case 'C':
1525                         cfg = optarg;
1526                         break;
1527                 case 'q':
1528                         quiet = true;
1529                         break;
1530                 case 'n':
1531                         name = optarg;
1532                         break;
1533                 case 'u':
1534                         id = pw_checkid(optarg, UID_MAX);
1535                         break;
1536                 case 'c':
1537                         gecos = pw_checkname(optarg, 1);
1538                         break;
1539                 case 'd':
1540                         homedir = optarg;
1541                         break;
1542                 case 'e':
1543                         now = time(NULL);
1544                         expire_days = parse_date(now, optarg);
1545                         break;
1546                 case 'p':
1547                         now = time(NULL);
1548                         password_days = parse_date(now, optarg);
1549                         break;
1550                 case 'g':
1551                         group_from_name_or_id(optarg);
1552                         grname = optarg;
1553                         break;
1554                 case 'G':
1555                         split_groups(&groups, optarg);
1556                         break;
1557                 case 'm':
1558                         createhome = true;
1559                         break;
1560                 case 'M':
1561                         homemode = validate_mode(optarg);
1562                         break;
1563                 case 'l':
1564                         newname = optarg;
1565                         break;
1566                 case 'k':
1567                         walk = skel = optarg;
1568                         if (*walk == '/')
1569                                 walk++;
1570                         if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1571                                 errx(EX_OSFILE, "skeleton `%s' does not "
1572                                     "exists", skel);
1573                         if (!S_ISDIR(st.st_mode))
1574                                 errx(EX_OSFILE, "skeleton `%s' is not a "
1575                                     "directory", skel);
1576                         break;
1577                 case 's':
1578                         shell = optarg;
1579                         break;
1580                 case 'w':
1581                         passwd = optarg;
1582                         break;
1583                 case 'L':
1584                         class = pw_checkname(optarg, 0);
1585                         break;
1586                 case 'H':
1587                         if (fd != -1)
1588                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1589                                     "exclusive options");
1590                         fd = pw_checkfd(optarg);
1591                         precrypted = true;
1592                         if (fd == '-')
1593                                 errx(EX_USAGE, "-H expects a file descriptor");
1594                         break;
1595                 case 'h':
1596                         if (fd != -1)
1597                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1598                                     "exclusive options");
1599                         fd = pw_checkfd(optarg);
1600                         break;
1601                 case 'N':
1602                         dryrun = true;
1603                         break;
1604                 case 'P':
1605                         pretty = true;
1606                         break;
1607                 case 'y':
1608                         nispasswd = optarg;
1609                         break;
1610                 case 'Y':
1611                         nis = true;
1612                         break;
1613                 }
1614         }
1615
1616         if (geteuid() != 0 && ! dryrun)
1617                 errx(EX_NOPERM, "you must be root");
1618
1619         if (quiet)
1620                 freopen(_PATH_DEVNULL, "w", stderr);
1621
1622         cnf = get_userconfig(cfg);
1623
1624         if (id < 0 && name == NULL)
1625                 errx(EX_DATAERR, "username or id required");
1626
1627         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
1628         if (pwd == NULL) {
1629                 if (name == NULL)
1630                         errx(EX_NOUSER, "no such uid `%ju'",
1631                             (uintmax_t) id);
1632                 errx(EX_NOUSER, "no such user `%s'", name);
1633         }
1634
1635         if (name == NULL)
1636                 name = pwd->pw_name;
1637
1638         if (nis && nispasswd == NULL)
1639                 nispasswd = cnf->nispasswd;
1640
1641         if (PWF._altdir == PWF_REGULAR &&
1642             ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
1643                 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
1644                         if (!nis && nispasswd && *nispasswd != '/')
1645                                 errx(EX_NOUSER, "Cannot modify NIS user `%s'",
1646                                     name);
1647                 } else {
1648                         errx(EX_NOUSER, "Cannot modify non local user `%s'",
1649                             name);
1650                 }
1651         }
1652
1653         if (newname) {
1654                 if (strcmp(pwd->pw_name, "root") == 0)
1655                         errx(EX_DATAERR, "can't rename `root' account");
1656                 if (strcmp(pwd->pw_name, newname) != 0) {
1657                         pwd->pw_name = pw_checkname(newname, 0);
1658                         edited = true;
1659                 }
1660         }
1661
1662         if (id >= 0 && pwd->pw_uid != id) {
1663                 pwd->pw_uid = id;
1664                 edited = true;
1665                 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
1666                         errx(EX_DATAERR, "can't change uid of `root' account");
1667                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1668                         warnx("WARNING: account `%s' will have a uid of 0 "
1669                             "(superuser access!)", pwd->pw_name);
1670         }
1671
1672         if (grname && pwd->pw_uid != 0) {
1673                 grp = GETGRNAM(grname);
1674                 if (grp == NULL)
1675                         grp = GETGRGID(pw_checkid(grname, GID_MAX));
1676                 if (grp->gr_gid != pwd->pw_gid) {
1677                         pwd->pw_gid = grp->gr_gid;
1678                         edited = true;
1679                 }
1680         }
1681
1682         if (password_days >= 0 && pwd->pw_change != password_days) {
1683                 pwd->pw_change = password_days;
1684                 edited = true;
1685         }
1686
1687         if (expire_days >= 0 && pwd->pw_expire != expire_days) {
1688                 pwd->pw_expire = expire_days;
1689                 edited = true;
1690         }
1691
1692         if (shell) {
1693                 shell = shell_path(cnf->shelldir, cnf->shells, shell);
1694                 if (shell == NULL)
1695                         shell = "";
1696                 if (strcmp(shell, pwd->pw_shell) != 0) {
1697                         pwd->pw_shell = shell;
1698                         edited = true;
1699                 }
1700         }
1701
1702         if (class && strcmp(pwd->pw_class, class) != 0) {
1703                 pwd->pw_class = class;
1704                 edited = true;
1705         }
1706
1707         if (homedir && strcmp(pwd->pw_dir, homedir) != 0) {
1708                 pwd->pw_dir = homedir;
1709                 edited = true;
1710                 if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) {
1711                         if (!createhome)
1712                                 warnx("WARNING: home `%s' does not exist",
1713                                     pwd->pw_dir);
1714                 } else if (!S_ISDIR(st.st_mode)) {
1715                         warnx("WARNING: home `%s' is not a directory",
1716                             pwd->pw_dir);
1717                 }
1718         }
1719
1720         if (passwd && conf.fd == -1) {
1721                 lc = login_getpwclass(pwd);
1722                 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1723                         warn("setting crypt(3) format");
1724                 login_close(lc);
1725                 cnf->default_password = passwd_val(passwd,
1726                     cnf->default_password);
1727                 pwd->pw_passwd = pw_password(cnf, pwd->pw_name, dryrun);
1728                 edited = true;
1729         }
1730
1731         if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) {
1732                 pwd->pw_gecos = gecos;
1733                 edited = true;
1734         }
1735
1736         if (fd != -1)
1737                 edited = pw_set_passwd(pwd, fd, precrypted, true);
1738
1739         if (dryrun)
1740                 return (print_user(pwd, pretty, false));
1741
1742         if (edited) /* Only updated this if required */
1743                 perform_chgpwent(name, pwd, nis ? nispasswd : NULL);
1744         /* Now perform the needed changes concern groups */
1745         if (groups != NULL) {
1746                 /* Delete User from groups using old name */
1747                 SETGRENT();
1748                 while ((grp = GETGRENT()) != NULL) {
1749                         if (grp->gr_mem == NULL)
1750                                 continue;
1751                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
1752                                 if (strcmp(grp->gr_mem[i] , name) != 0)
1753                                         continue;
1754                                 for (j = i; grp->gr_mem[j] != NULL ; j++)
1755                                         grp->gr_mem[j] = grp->gr_mem[j+1];
1756                                 chggrent(grp->gr_name, grp);
1757                                 break;
1758                         }
1759                 }
1760                 ENDGRENT();
1761                 /* Add the user to the needed groups */
1762                 for (i = 0; i < groups->sl_cur; i++) {
1763                         grp = GETGRNAM(groups->sl_str[i]);
1764                         grp = gr_add(grp, pwd->pw_name);
1765                         if (grp == NULL)
1766                                 continue;
1767                         chggrent(grp->gr_name, grp);
1768                         free(grp);
1769                 }
1770         }
1771         /* In case of rename we need to walk over the different groups */
1772         if (newname) {
1773                 SETGRENT();
1774                 while ((grp = GETGRENT()) != NULL) {
1775                         if (grp->gr_mem == NULL)
1776                                 continue;
1777                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
1778                                 if (strcmp(grp->gr_mem[i], name) != 0)
1779                                         continue;
1780                                 grp->gr_mem[i] = newname;
1781                                 chggrent(grp->gr_name, grp);
1782                                 break;
1783                         }
1784                 }
1785         }
1786
1787         /* go get a current version of pwd */
1788         if (newname)
1789                 name = newname;
1790         pwd = GETPWNAM(name);
1791         if (pwd == NULL)
1792                 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1793         grp = GETGRGID(pwd->pw_gid);
1794         pw_log(cnf, M_UPDATE, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1795             pwd->pw_name, (uintmax_t)pwd->pw_uid,
1796             grp ? grp->gr_name : "unknown",
1797             (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1798             pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1799
1800         /*
1801          * Let's create and populate the user's home directory. Note
1802          * that this also `works' for editing users if -m is used, but
1803          * existing files will *not* be overwritten.
1804          */
1805         if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1806             *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
1807                 if (!skel)
1808                         skel = cnf->dotdir;
1809                 if (homemode == 0)
1810                         homemode = cnf->homemode;
1811                 create_and_populate_homedir(cnf, pwd, skel, homemode, true);
1812         }
1813
1814         if (nis && nis_update() == 0)
1815                 pw_log(cnf, M_UPDATE, W_USER, "NIS maps updated");
1816
1817         return (EXIT_SUCCESS);
1818 }