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