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