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 <assert.h>
  39 #include <ctype.h>
  40 #include <dirent.h>
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <fcntl.h>
  44 #include <grp.h>
  45 #include <pwd.h>
  46 #include <libutil.h>
  47 #include <login_cap.h>
  48 #include <paths.h>
  49 #include <string.h>
  50 #include <sysexits.h>
  51 #include <termios.h>
  52 #include <unistd.h>
  53
  54 #include "pw.h"
  55 #include "bitmap.h"
  56 #include "psdate.h"
  57
  58 #define LOGNAMESIZE (MAXLOGNAME-1)
  59
  60 static          char locked_str[] = "*LOCKED*";
  61
  62 static struct passwd fakeuser = {
  63         "nouser",
  64         "*",
  65         -1,
  66         -1,
  67         0,
  68         "",
  69         "User &",
  70         "/nonexistent",
  71         "/bin/sh",
  72         0,
  73         0
  74 };
  75
  76 static int       print_user(struct passwd *pwd, bool pretty, bool v7);
  77 static uid_t     pw_uidpolicy(struct userconf *cnf, intmax_t id);
  78 static uid_t     pw_gidpolicy(struct userconf *cnf, char *grname, char *nam,
  79     gid_t prefer, bool dryrun);
  80 static char     *pw_homepolicy(struct userconf * cnf, char *homedir,
  81     const char *user);
  82 static char     *pw_shellpolicy(struct userconf * cnf);
  83 static char     *pw_password(struct userconf * cnf, char const * user,
  84     bool dryrun);
  85 static char     *shell_path(char const * path, char *shells[], char *sh);
  86 static void     rmat(uid_t uid);
  87 static void     rmopie(char const * name);
  88
  89 static void
  90 mkdir_home_parents(int dfd, const char *dir)
  91 {
  92         struct stat st;
  93         char *dirs, *tmp;
  94
  95         if (*dir != '/')
  96                 errx(EX_DATAERR, "invalid base directory for home '%s'", dir);
  97
  98         dir++;
  99
 100         if (fstatat(dfd, dir, &st, 0) != -1) {
 101                 if (S_ISDIR(st.st_mode))
 102                         return;
 103                 errx(EX_OSFILE, "root home `/%s' is not a directory", dir);
 104         }
 105
 106         dirs = strdup(dir);
 107         if (dirs == NULL)
 108                 errx(EX_UNAVAILABLE, "out of memory");
 109
 110         tmp = strrchr(dirs, '/');
 111         if (tmp == NULL) {
 112                 free(dirs);
 113                 return;
 114         }
 115         tmp[0] = '\0';
 116
 117         /*
 118          * This is a kludge especially for Joerg :)
 119          * If the home directory would be created in the root partition, then
 120          * we really create it under /usr which is likely to have more space.
 121          * But we create a symlink from cnf->home -> "/usr" -> cnf->home
 122          */
 123         if (strchr(dirs, '/') == NULL) {
 124                 asprintf(&tmp, "usr/%s", dirs);
 125                 if (tmp == NULL)
 126                         errx(EX_UNAVAILABLE, "out of memory");
 127                 if (mkdirat(dfd, tmp, _DEF_DIRMODE) != -1 || errno == EEXIST) {
 128                         fchownat(dfd, tmp, 0, 0, 0);
 129                         symlinkat(tmp, dfd, dirs);
 130                 }
 131                 free(tmp);
 132         }
 133         tmp = dirs;
 134         if (fstatat(dfd, dirs, &st, 0) == -1) {
 135                 while ((tmp = strchr(tmp + 1, '/')) != NULL) {
 136                         *tmp = '\0';
 137                         if (fstatat(dfd, dirs, &st, 0) == -1) {
 138                                 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
 139                                         err(EX_OSFILE,  "'%s' (root home parent) is not a directory", dirs);
 140                         }
 141                         *tmp = '/';
 142                 }
 143         }
 144         if (fstatat(dfd, dirs, &st, 0) == -1) {
 145                 if (mkdirat(dfd, dirs, _DEF_DIRMODE) == -1)
 146                         err(EX_OSFILE,  "'%s' (root home parent) is not a directory", dirs);
 147                 fchownat(dfd, dirs, 0, 0, 0);
 148         }
 149
 150         free(dirs);
 151 }
 152
 153 static void
 154 create_and_populate_homedir(struct userconf *cnf, struct passwd *pwd,
 155     const char *skeldir, mode_t homemode, bool update)
 156 {
 157         int skelfd = -1;
 158
 159         /* Create home parents directories */
 160         mkdir_home_parents(conf.rootfd, pwd->pw_dir);
 161
 162         if (skeldir != NULL && *skeldir != '\0') {
 163                 if (*skeldir == '/')
 164                         skeldir++;
 165                 skelfd = openat(conf.rootfd, skeldir, O_DIRECTORY|O_CLOEXEC);
 166         }
 167
 168         copymkdir(conf.rootfd, pwd->pw_dir, skelfd, homemode, pwd->pw_uid,
 169             pwd->pw_gid, 0);
 170         pw_log(cnf, update ? M_UPDATE : M_ADD, W_USER, "%s(%ju) home %s made",
 171             pwd->pw_name, (uintmax_t)pwd->pw_uid, pwd->pw_dir);
 172 }
 173
 174 static int
 175 pw_set_passwd(struct passwd *pwd, int fd, bool precrypted, bool update)
 176 {
 177         int              b, istty;
 178         struct termios   t, n;
 179         login_cap_t     *lc;
 180         char            line[_PASSWORD_LEN+1];
 181         char            *p;
 182
 183         if (fd == '-') {
 184                 if (!pwd->pw_passwd || *pwd->pw_passwd != '*') {
 185                         pwd->pw_passwd = "*";   /* No access */
 186                         return (1);
 187                 }
 188                 return (0);
 189         }
 190
 191         if ((istty = isatty(fd))) {
 192                 if (tcgetattr(fd, &t) == -1)
 193                         istty = 0;
 194                 else {
 195                         n = t;
 196                         n.c_lflag &= ~(ECHO);
 197                         tcsetattr(fd, TCSANOW, &n);
 198                         printf("%s%spassword for user %s:",
 199                             update ? "new " : "",
 200                             precrypted ? "encrypted " : "",
 201                             pwd->pw_name);
 202                         fflush(stdout);
 203                 }
 204         }
 205         b = read(fd, line, sizeof(line) - 1);
 206         if (istty) {    /* Restore state */
 207                 tcsetattr(fd, TCSANOW, &t);
 208                 fputc('\n', stdout);
 209                 fflush(stdout);
 210         }
 211
 212         if (b < 0)
 213                 err(EX_IOERR, "-%c file descriptor",
 214                     precrypted ? 'H' : 'h');
 215         line[b] = '\0';
 216         if ((p = strpbrk(line, "\r\n")) != NULL)
 217                 *p = '\0';
 218         if (!*line)
 219                 errx(EX_DATAERR, "empty password read on file descriptor %d",
 220                     fd);
 221         if (precrypted) {
 222                 if (strchr(line, ':') != NULL)
 223                         errx(EX_DATAERR, "bad encrypted password");
 224                 pwd->pw_passwd = strdup(line);
 225         } else {
 226                 lc = login_getpwclass(pwd);
 227                 if (lc == NULL ||
 228                                 login_setcryptfmt(lc, "sha512", NULL) == NULL)
 229                         warn("setting crypt(3) format");
 230                 login_close(lc);
 231                 pwd->pw_passwd = pw_pwcrypt(line);
 232         }
 233         return (1);
 234 }
 235
 236 static void
 237 perform_chgpwent(const char *name, struct passwd *pwd, char *nispasswd)
 238 {
 239         int rc;
 240         struct passwd *nispwd;
 241
 242         /* duplicate for nis so that chgpwent is not modifying before NIS */
 243         if (nispasswd && *nispasswd == '/')
 244                 nispwd = pw_dup(pwd);
 245
 246         rc = chgpwent(name, pwd);
 247         if (rc == -1)
 248                 errx(EX_IOERR, "user '%s' does not exist (NIS?)", pwd->pw_name);
 249         else if (rc != 0)
 250                 err(EX_IOERR, "passwd file update");
 251
 252         if (nispasswd && *nispasswd == '/') {
 253                 rc = chgnispwent(nispasswd, name, nispwd);
 254                 if (rc == -1)
 255                         warn("User '%s' not found in NIS passwd", pwd->pw_name);
 256                 else if (rc != 0)
 257                         warn("NIS passwd update");
 258                 /* NOTE: NIS-only update errors are not fatal */
 259         }
 260 }
 261
 262 /*
 263  * The M_LOCK and M_UNLOCK functions simply add or remove
 264  * a "*LOCKED*" prefix from in front of the password to
 265  * prevent it decoding correctly, and therefore prevents
 266  * access. Of course, this only prevents access via
 267  * password authentication (not ssh, kerberos or any
 268  * other method that does not use the UNIX password) but
 269  * that is a known limitation.
 270  */
 271 static int
 272 pw_userlock(char *arg1, int mode)
 273 {
 274         struct passwd *pwd = NULL;
 275         char *passtmp = NULL;
 276         char *name;
 277         bool locked = false;
 278         uid_t id = (uid_t)-1;
 279
 280         if (geteuid() != 0)
 281                 errx(EX_NOPERM, "you must be root");
 282
 283         if (arg1 == NULL)
 284                 errx(EX_DATAERR, "username or id required");
 285
 286         name = arg1;
 287         if (arg1[strspn(name, "0123456789")] == '\0')
 288                 id = pw_checkid(name, UID_MAX);
 289
 290         pwd = GETPWNAM(pw_checkname(name, 0));
 291         if (pwd == NULL && id != (uid_t)-1) {
 292                 pwd = GETPWUID(id);
 293                 if (pwd != NULL)
 294                         name = pwd->pw_name;
 295         }
 296         if (pwd == NULL) {
 297                 if (id == (uid_t)-1)
 298                         errx(EX_NOUSER, "no such name or uid `%ju'", (uintmax_t) id);
 299                 errx(EX_NOUSER, "no such user `%s'", name);
 300         }
 301
 302         if (name == NULL)
 303                 name = pwd->pw_name;
 304
 305         if (strncmp(pwd->pw_passwd, locked_str, sizeof(locked_str) -1) == 0)
 306                 locked = true;
 307         if (mode == M_LOCK && locked)
 308                 errx(EX_DATAERR, "user '%s' is already locked", pwd->pw_name);
 309         if (mode == M_UNLOCK && !locked)
 310                 errx(EX_DATAERR, "user '%s' is not locked", pwd->pw_name);
 311
 312         if (mode == M_LOCK) {
 313                 asprintf(&passtmp, "%s%s", locked_str, pwd->pw_passwd);
 314                 if (passtmp == NULL)    /* disaster */
 315                         errx(EX_UNAVAILABLE, "out of memory");
 316                 pwd->pw_passwd = passtmp;
 317         } else {
 318                 pwd->pw_passwd += sizeof(locked_str)-1;
 319         }
 320
 321         perform_chgpwent(name, pwd, NULL);
 322         free(passtmp);
 323
 324         return (EXIT_SUCCESS);
 325 }
 326
 327 static uid_t
 328 pw_uidpolicy(struct userconf * cnf, intmax_t id)
 329 {
 330         struct passwd  *pwd;
 331         struct bitmap   bm;
 332         uid_t           uid = (uid_t) - 1;
 333
 334         /*
 335          * Check the given uid, if any
 336          */
 337         if (id >= 0) {
 338                 uid = (uid_t) id;
 339
 340                 if ((pwd = GETPWUID(uid)) != NULL && conf.checkduplicate)
 341                         errx(EX_DATAERR, "uid `%ju' has already been allocated",
 342                             (uintmax_t)pwd->pw_uid);
 343                 return (uid);
 344         }
 345         /*
 346          * We need to allocate the next available uid under one of
 347          * two policies a) Grab the first unused uid b) Grab the
 348          * highest possible unused uid
 349          */
 350         if (cnf->min_uid >= cnf->max_uid) {     /* Sanity
 351                                                  * claus^H^H^H^Hheck */
 352                 cnf->min_uid = 1000;
 353                 cnf->max_uid = 32000;
 354         }
 355         bm = bm_alloc(cnf->max_uid - cnf->min_uid + 1);
 356
 357         /*
 358          * Now, let's fill the bitmap from the password file
 359          */
 360         SETPWENT();
 361         while ((pwd = GETPWENT()) != NULL)
 362                 if (pwd->pw_uid >= (uid_t) cnf->min_uid && pwd->pw_uid <= (uid_t) cnf->max_uid)
 363                         bm_setbit(&bm, pwd->pw_uid - cnf->min_uid);
 364         ENDPWENT();
 365
 366         /*
 367          * Then apply the policy, with fallback to reuse if necessary
 368          */
 369         if (cnf->reuse_uids || (uid = (uid_t) (bm_lastset(&bm) + cnf->min_uid + 1)) > cnf->max_uid)
 370                 uid = (uid_t) (bm_firstunset(&bm) + cnf->min_uid);
 371
 372         /*
 373          * Another sanity check
 374          */
 375         if (uid < cnf->min_uid || uid > cnf->max_uid)
 376                 errx(EX_SOFTWARE, "unable to allocate a new uid - range fully used");
 377         bm_dealloc(&bm);
 378         return (uid);
 379 }
 380
 381 static uid_t
 382 pw_gidpolicy(struct userconf *cnf, char *grname, char *nam, gid_t prefer, bool dryrun)
 383 {
 384         struct group   *grp;
 385         gid_t           gid = (uid_t) - 1;
 386
 387         /*
 388          * Check the given gid, if any
 389          */
 390         SETGRENT();
 391         if (grname) {
 392                 if ((grp = GETGRNAM(grname)) == NULL) {
 393                         gid = pw_checkid(grname, GID_MAX);
 394                         grp = GETGRGID(gid);
 395                 }
 396                 gid = grp->gr_gid;
 397         } else if ((grp = GETGRNAM(nam)) != NULL &&
 398             (grp->gr_mem == NULL || grp->gr_mem[0] == NULL)) {
 399                 gid = grp->gr_gid;  /* Already created? Use it anyway... */
 400         } else {
 401                 intmax_t                grid = -1;
 402
 403                 /*
 404                  * We need to auto-create a group with the user's name. We
 405                  * can send all the appropriate output to our sister routine
 406                  * bit first see if we can create a group with gid==uid so we
 407                  * can keep the user and group ids in sync. We purposely do
 408                  * NOT check the gid range if we can force the sync. If the
 409                  * user's name dups an existing group, then the group add
 410                  * function will happily handle that case for us and exit.
 411                  */
 412                 if (GETGRGID(prefer) == NULL)
 413                         grid = prefer;
 414                 if (dryrun) {
 415                         gid = pw_groupnext(cnf, true);
 416                 } else {
 417                         if (grid == -1)
 418                                 grid =  pw_groupnext(cnf, true);
 419                         groupadd(cnf, nam, grid, NULL, -1, false, false, false);
 420                         if ((grp = GETGRNAM(nam)) != NULL)
 421                                 gid = grp->gr_gid;
 422                 }
 423         }
 424         ENDGRENT();
 425         return (gid);
 426 }
 427
 428 static char *
 429 pw_homepolicy(struct userconf * cnf, char *homedir, const char *user)
 430 {
 431         static char     home[128];
 432
 433         if (homedir)
 434                 return (homedir);
 435
 436         if (cnf->home == NULL || *cnf->home == '\0')
 437                 errx(EX_CONFIG, "no base home directory set");
 438         snprintf(home, sizeof(home), "%s/%s", cnf->home, user);
 439
 440         return (home);
 441 }
 442
 443 static char *
 444 shell_path(char const * path, char *shells[], char *sh)
 445 {
 446         if (sh != NULL && (*sh == '/' || *sh == '\0'))
 447                 return sh;      /* specified full path or forced none */
 448         else {
 449                 char           *p;
 450                 char            paths[_UC_MAXLINE];
 451
 452                 /*
 453                  * We need to search paths
 454                  */
 455                 strlcpy(paths, path, sizeof(paths));
 456                 for (p = strtok(paths, ": \t\r\n"); p != NULL; p = strtok(NULL, ": \t\r\n")) {
 457                         int             i;
 458                         static char     shellpath[256];
 459
 460                         if (sh != NULL) {
 461                                 snprintf(shellpath, sizeof(shellpath), "%s/%s", p, sh);
 462                                 if (access(shellpath, X_OK) == 0)
 463                                         return shellpath;
 464                         } else
 465                                 for (i = 0; i < _UC_MAXSHELLS && shells[i] != NULL; i++) {
 466                                         snprintf(shellpath, sizeof(shellpath), "%s/%s", p, shells[i]);
 467                                         if (access(shellpath, X_OK) == 0)
 468                                                 return shellpath;
 469                                 }
 470                 }
 471                 if (sh == NULL)
 472                         errx(EX_OSFILE, "can't find shell `%s' in shell paths", sh);
 473                 errx(EX_CONFIG, "no default shell available or defined");
 474                 return NULL;
 475         }
 476 }
 477
 478 static char *
 479 pw_shellpolicy(struct userconf * cnf)
 480 {
 481
 482         return shell_path(cnf->shelldir, cnf->shells, cnf->shell_default);
 483 }
 484
 485 #define SALTSIZE        32
 486
 487 static char const chars[] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ./";
 488
 489 char *
 490 pw_pwcrypt(char *password)
 491 {
 492         int             i;
 493         char            salt[SALTSIZE + 1];
 494         char            *cryptpw;
 495         static char     buf[256];
 496         size_t          pwlen;
 497
 498         /*
 499          * Calculate a salt value
 500          */
 501         for (i = 0; i < SALTSIZE; i++)
 502                 salt[i] = chars[arc4random_uniform(sizeof(chars) - 1)];
 503         salt[SALTSIZE] = '\0';
 504
 505         cryptpw = crypt(password, salt);
 506         if (cryptpw == NULL)
 507                 errx(EX_CONFIG, "crypt(3) failure");
 508         pwlen = strlcpy(buf, cryptpw, sizeof(buf));
 509         assert(pwlen < sizeof(buf));
 510         return (buf);
 511 }
 512
 513 static char *
 514 pw_password(struct userconf * cnf, char const * user, bool dryrun)
 515 {
 516         int             i, l;
 517         char            pwbuf[32];
 518
 519         switch (cnf->default_password) {
 520         case P_NONE:            /* No password at all! */
 521                 return "";
 522         case P_RANDOM:                  /* Random password */
 523                 l = (arc4random() % 8 + 8);     /* 8 - 16 chars */
 524                 for (i = 0; i < l; i++)
 525                         pwbuf[i] = chars[arc4random_uniform(sizeof(chars)-1)];
 526                 pwbuf[i] = '\0';
 527
 528                 /*
 529                  * We give this information back to the user
 530                  */
 531                 if (conf.fd == -1 && !dryrun) {
 532                         if (isatty(STDOUT_FILENO))
 533                                 printf("Password for '%s' is: ", user);
 534                         printf("%s\n", pwbuf);
 535                         fflush(stdout);
 536                 }
 537                 break;
 538         case P_YES:             /* user's name */
 539                 strlcpy(pwbuf, user, sizeof(pwbuf));
 540                 break;
 541         case P_NO:              /* No login - default */
 542                                 /* FALLTHROUGH */
 543         default:
 544                 return "*";
 545         }
 546         return pw_pwcrypt(pwbuf);
 547 }
 548
 549 static int
 550 print_user(struct passwd * pwd, bool pretty, bool v7)
 551 {
 552         int             j;
 553         char           *p;
 554         struct group   *grp = GETGRGID(pwd->pw_gid);
 555         char            uname[60] = "User &", office[60] = "[None]",
 556                         wphone[60] = "[None]", hphone[60] = "[None]";
 557         char            acexpire[32] = "[None]", pwexpire[32] = "[None]";
 558         struct tm *    tptr;
 559
 560         if (!pretty) {
 561                 p = v7 ? pw_make_v7(pwd) : pw_make(pwd);
 562                 printf("%s\n", p);
 563                 free(p);
 564                 return (EXIT_SUCCESS);
 565         }
 566
 567         if ((p = strtok(pwd->pw_gecos, ",")) != NULL) {
 568                 strlcpy(uname, p, sizeof(uname));
 569                 if ((p = strtok(NULL, ",")) != NULL) {
 570                         strlcpy(office, p, sizeof(office));
 571                         if ((p = strtok(NULL, ",")) != NULL) {
 572                                 strlcpy(wphone, p, sizeof(wphone));
 573                                 if ((p = strtok(NULL, "")) != NULL) {
 574                                         strlcpy(hphone, p, sizeof(hphone));
 575                                 }
 576                         }
 577                 }
 578         }
 579         /*
 580          * Handle '&' in gecos field
 581          */
 582         if ((p = strchr(uname, '&')) != NULL) {
 583                 int             l = strlen(pwd->pw_name);
 584                 int             m = strlen(p);
 585
 586                 memmove(p + l, p + 1, m);
 587                 memmove(p, pwd->pw_name, l);
 588                 *p = (char) toupper((unsigned char)*p);
 589         }
 590         if (pwd->pw_expire > (time_t)0 && (tptr = localtime(&pwd->pw_expire)) != NULL)
 591                 strftime(acexpire, sizeof acexpire, "%c", tptr);
 592         if (pwd->pw_change > (time_t)0 && (tptr = localtime(&pwd->pw_change)) != NULL)
 593                 strftime(pwexpire, sizeof pwexpire, "%c", tptr);
 594         printf("Login Name: %-15s   #%-12ju Group: %-15s   #%ju\n"
 595                " Full Name: %s\n"
 596                "      Home: %-26.26s      Class: %s\n"
 597                "     Shell: %-26.26s     Office: %s\n"
 598                "Work Phone: %-26.26s Home Phone: %s\n"
 599                "Acc Expire: %-26.26s Pwd Expire: %s\n",
 600                pwd->pw_name, (uintmax_t)pwd->pw_uid,
 601                grp ? grp->gr_name : "(invalid)", (uintmax_t)pwd->pw_gid,
 602                uname, pwd->pw_dir, pwd->pw_class,
 603                pwd->pw_shell, office, wphone, hphone,
 604                acexpire, pwexpire);
 605         SETGRENT();
 606         j = 0;
 607         while ((grp=GETGRENT()) != NULL) {
 608                 int     i = 0;
 609                 if (grp->gr_mem != NULL) {
 610                         while (grp->gr_mem[i] != NULL) {
 611                                 if (strcmp(grp->gr_mem[i], pwd->pw_name)==0) {
 612                                         printf(j++ == 0 ? "    Groups: %s" : ",%s", grp->gr_name);
 613                                         break;
 614                                 }
 615                                 ++i;
 616                         }
 617                 }
 618         }
 619         ENDGRENT();
 620         printf("%s", j ? "\n" : "");
 621         return (EXIT_SUCCESS);
 622 }
 623
 624 char *
 625 pw_checkname(char *name, int gecos)
 626 {
 627         char showch[8];
 628         const char *badchars, *ch, *showtype;
 629         int reject;
 630
 631         ch = name;
 632         reject = 0;
 633         if (gecos) {
 634                 /* See if the name is valid as a gecos (comment) field. */
 635                 badchars = ":";
 636                 showtype = "gecos field";
 637         } else {
 638                 /* See if the name is valid as a userid or group. */
 639                 badchars = " ,\t:+&#%$^()!@~*?<>=|\\/\"";
 640                 showtype = "userid/group name";
 641                 /* Userids and groups can not have a leading '-'. */
 642                 if (*ch == '-')
 643                         reject = 1;
 644         }
 645         if (!reject) {
 646                 while (*ch) {
 647                         if (strchr(badchars, *ch) != NULL ||
 648                             (!gecos && *ch < ' ') ||
 649                             *ch == 127) {
 650                                 reject = 1;
 651                                 break;
 652                         }
 653                         /* 8-bit characters are only allowed in GECOS fields */
 654                         if (!gecos && (*ch & 0x80)) {
 655                                 reject = 1;
 656                                 break;
 657                         }
 658                         ch++;
 659                 }
 660         }
 661         /*
 662          * A `$' is allowed as the final character for userids and groups,
 663          * mainly for the benefit of samba.
 664          */
 665         if (reject && !gecos) {
 666                 if (*ch == '$' && *(ch + 1) == '\0') {
 667                         reject = 0;
 668                         ch++;
 669                 }
 670         }
 671         if (reject) {
 672                 snprintf(showch, sizeof(showch), (*ch >= ' ' && *ch < 127)
 673                     ? "`%c'" : "0x%02x", *ch);
 674                 errx(EX_DATAERR, "invalid character %s at position %td in %s",
 675                     showch, (ch - name), showtype);
 676         }
 677         if (!gecos && (ch - name) > LOGNAMESIZE)
 678                 errx(EX_USAGE, "name too long `%s' (max is %d)", name,
 679                     LOGNAMESIZE);
 680
 681         return (name);
 682 }
 683
 684 static void
 685 rmat(uid_t uid)
 686 {
 687         DIR            *d = opendir("/var/at/jobs");
 688
 689         if (d != NULL) {
 690                 struct dirent  *e;
 691
 692                 while ((e = readdir(d)) != NULL) {
 693                         struct stat     st;
 694
 695                         if (strncmp(e->d_name, ".lock", 5) != 0 &&
 696                             stat(e->d_name, &st) == 0 &&
 697                             !S_ISDIR(st.st_mode) &&
 698                             st.st_uid == uid) {
 699                                 char            tmp[MAXPATHLEN];
 700
 701                                 snprintf(tmp, sizeof(tmp), "/usr/bin/atrm %s",
 702                                     e->d_name);
 703                                 system(tmp);
 704                         }
 705                 }
 706                 closedir(d);
 707         }
 708 }
 709
 710 static void
 711 rmopie(char const * name)
 712 {
 713         char tmp[1014];
 714         FILE *fp;
 715         int fd;
 716         size_t len;
 717         off_t   atofs = 0;
 718
 719         if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1)
 720                 return;
 721
 722         fp = fdopen(fd, "r+");
 723         len = strlen(name);
 724
 725         while (fgets(tmp, sizeof(tmp), fp) != NULL) {
 726                 if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') {
 727                         /* Comment username out */
 728                         if (fseek(fp, atofs, SEEK_SET) == 0)
 729                                 fwrite("#", 1, 1, fp);
 730                         break;
 731                 }
 732                 atofs = ftell(fp);
 733         }
 734         /*
 735          * If we got an error of any sort, don't update!
 736          */
 737         fclose(fp);
 738 }
 739
 740 int
 741 pw_user_next(int argc, char **argv, char *name __unused)
 742 {
 743         struct userconf *cnf = NULL;
 744         const char *cfg = NULL;
 745         int ch;
 746         bool quiet = false;
 747         uid_t next;
 748
 749         while ((ch = getopt(argc, argv, "Cq")) != -1) {
 750                 switch (ch) {
 751                 case 'C':
 752                         cfg = optarg;
 753                         break;
 754                 case 'q':
 755                         quiet = true;
 756                         break;
 757                 }
 758         }
 759
 760         if (quiet)
 761                 freopen(_PATH_DEVNULL, "w", stderr);
 762
 763         cnf = get_userconfig(cfg);
 764
 765         next = pw_uidpolicy(cnf, -1);
 766
 767         printf("%ju:", (uintmax_t)next);
 768         pw_groupnext(cnf, quiet);
 769
 770         return (EXIT_SUCCESS);
 771 }
 772
 773 int
 774 pw_user_show(int argc, char **argv, char *arg1)
 775 {
 776         struct passwd *pwd = NULL;
 777         char *name = NULL;
 778         intmax_t id = -1;
 779         int ch;
 780         bool all = false;
 781         bool pretty = false;
 782         bool force = false;
 783         bool v7 = false;
 784         bool quiet = false;
 785
 786         if (arg1 != NULL) {
 787                 if (arg1[strspn(arg1, "0123456789")] == '\0')
 788                         id = pw_checkid(arg1, UID_MAX);
 789                 else
 790                         name = arg1;
 791         }
 792
 793         while ((ch = getopt(argc, argv, "C:qn:u:FPa7")) != -1) {
 794                 switch (ch) {
 795                 case 'C':
 796                         /* ignore compatibility */
 797                         break;
 798                 case 'q':
 799                         quiet = true;
 800                         break;
 801                 case 'n':
 802                         name = optarg;
 803                         break;
 804                 case 'u':
 805                         id = pw_checkid(optarg, UID_MAX);
 806                         break;
 807                 case 'F':
 808                         force = true;
 809                         break;
 810                 case 'P':
 811                         pretty = true;
 812                         break;
 813                 case 'a':
 814                         all = true;
 815                         break;
 816                 case '7':
 817                         v7 = true;
 818                         break;
 819                 }
 820         }
 821
 822         if (quiet)
 823                 freopen(_PATH_DEVNULL, "w", stderr);
 824
 825         if (all) {
 826                 SETPWENT();
 827                 while ((pwd = GETPWENT()) != NULL)
 828                         print_user(pwd, pretty, v7);
 829                 ENDPWENT();
 830                 return (EXIT_SUCCESS);
 831         }
 832
 833         if (id < 0 && name == NULL)
 834                 errx(EX_DATAERR, "username or id required");
 835
 836         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
 837         if (pwd == NULL) {
 838                 if (force) {
 839                         pwd = &fakeuser;
 840                 } else {
 841                         if (name == NULL)
 842                                 errx(EX_NOUSER, "no such uid `%ju'",
 843                                     (uintmax_t) id);
 844                         errx(EX_NOUSER, "no such user `%s'", name);
 845                 }
 846         }
 847
 848         return (print_user(pwd, pretty, v7));
 849 }
 850
 851 int
 852 pw_user_del(int argc, char **argv, char *arg1)
 853 {
 854         struct userconf *cnf = NULL;
 855         struct passwd *pwd = NULL;
 856         struct group *gr, *grp;
 857         char *name = NULL;
 858         char grname[MAXLOGNAME];
 859         char *nispasswd = NULL;
 860         char file[MAXPATHLEN];
 861         char home[MAXPATHLEN];
 862         const char *cfg = NULL;
 863         struct stat st;
 864         intmax_t id = -1;
 865         int ch, rc;
 866         bool nis = false;
 867         bool deletehome = false;
 868         bool quiet = false;
 869
 870         if (arg1 != NULL) {
 871                 if (arg1[strspn(arg1, "0123456789")] == '\0')
 872                         id = pw_checkid(arg1, UID_MAX);
 873                 else
 874                         name = arg1;
 875         }
 876
 877         while ((ch = getopt(argc, argv, "C:qn:u:rYy:")) != -1) {
 878                 switch (ch) {
 879                 case 'C':
 880                         cfg = optarg;
 881                         break;
 882                 case 'q':
 883                         quiet = true;
 884                         break;
 885                 case 'n':
 886                         name = optarg;
 887                         break;
 888                 case 'u':
 889                         id = pw_checkid(optarg, UID_MAX);
 890                         break;
 891                 case 'r':
 892                         deletehome = true;
 893                         break;
 894                 case 'y':
 895                         nispasswd = optarg;
 896                         break;
 897                 case 'Y':
 898                         nis = true;
 899                         break;
 900                 }
 901         }
 902
 903         if (quiet)
 904                 freopen(_PATH_DEVNULL, "w", stderr);
 905
 906         if (id < 0 && name == NULL)
 907                 errx(EX_DATAERR, "username or id required");
 908
 909         cnf = get_userconfig(cfg);
 910
 911         if (nispasswd == NULL)
 912                 nispasswd = cnf->nispasswd;
 913
 914         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
 915         if (pwd == NULL) {
 916                 if (name == NULL)
 917                         errx(EX_NOUSER, "no such uid `%ju'", (uintmax_t) id);
 918                 errx(EX_NOUSER, "no such user `%s'", name);
 919         }
 920
 921         if (PWF._altdir == PWF_REGULAR &&
 922             ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
 923                 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
 924                         if (!nis && nispasswd && *nispasswd != '/')
 925                                 errx(EX_NOUSER, "Cannot remove NIS user `%s'",
 926                                     name);
 927                 } else {
 928                         errx(EX_NOUSER, "Cannot remove non local user `%s'",
 929                             name);
 930                 }
 931         }
 932
 933         id = pwd->pw_uid;
 934         if (name == NULL)
 935                 name = pwd->pw_name;
 936
 937         if (strcmp(pwd->pw_name, "root") == 0)
 938                 errx(EX_DATAERR, "cannot remove user 'root'");
 939
 940         /* Remove opie record from /etc/opiekeys */
 941         if (PWALTDIR() != PWF_ALT)
 942                 rmopie(pwd->pw_name);
 943
 944         if (!PWALTDIR()) {
 945                 /* Remove crontabs */
 946                 snprintf(file, sizeof(file), "/var/cron/tabs/%s", pwd->pw_name);
 947                 if (access(file, F_OK) == 0) {
 948                         snprintf(file, sizeof(file), "crontab -u %s -r",
 949                             pwd->pw_name);
 950                         system(file);
 951                 }
 952         }
 953
 954         /*
 955          * Save these for later, since contents of pwd may be
 956          * invalidated by deletion
 957          */
 958         snprintf(file, sizeof(file), "%s/%s", _PATH_MAILDIR, pwd->pw_name);
 959         strlcpy(home, pwd->pw_dir, sizeof(home));
 960         gr = GETGRGID(pwd->pw_gid);
 961         if (gr != NULL)
 962                 strlcpy(grname, gr->gr_name, LOGNAMESIZE);
 963         else
 964                 grname[0] = '\0';
 965
 966         rc = delpwent(pwd);
 967         if (rc == -1)
 968                 err(EX_IOERR, "user '%s' does not exist", pwd->pw_name);
 969         else if (rc != 0)
 970                 err(EX_IOERR, "passwd update");
 971
 972         if (nis && nispasswd && *nispasswd=='/') {
 973                 rc = delnispwent(nispasswd, name);
 974                 if (rc == -1)
 975                         warnx("WARNING: user '%s' does not exist in NIS passwd",
 976                             pwd->pw_name);
 977                 else if (rc != 0)
 978                         warn("WARNING: NIS passwd update");
 979         }
 980
 981         grp = GETGRNAM(name);
 982         if (grp != NULL &&
 983             (grp->gr_mem == NULL || *grp->gr_mem == NULL) &&
 984             strcmp(name, grname) == 0)
 985                 delgrent(GETGRNAM(name));
 986         SETGRENT();
 987         while ((grp = GETGRENT()) != NULL) {
 988                 int i, j;
 989                 char group[MAXLOGNAME];
 990                 if (grp->gr_mem == NULL)
 991                         continue;
 992
 993                 for (i = 0; grp->gr_mem[i] != NULL; i++) {
 994                         if (strcmp(grp->gr_mem[i], name) != 0)
 995                                 continue;
 996
 997                         for (j = i; grp->gr_mem[j] != NULL; j++)
 998                                 grp->gr_mem[j] = grp->gr_mem[j+1];
 999                         strlcpy(group, grp->gr_name, MAXLOGNAME);
1000                         chggrent(group, grp);
1001                 }
1002         }
1003         ENDGRENT();
1004
1005         pw_log(cnf, M_DELETE, W_USER, "%s(%ju) account removed", name,
1006             (uintmax_t)id);
1007
1008         /* Remove mail file */
1009         if (PWALTDIR() != PWF_ALT)
1010                 unlinkat(conf.rootfd, file + 1, 0);
1011
1012         /* Remove at jobs */
1013         if (!PWALTDIR() && getpwuid(id) == NULL)
1014                 rmat(id);
1015
1016         /* Remove home directory and contents */
1017         if (PWALTDIR() != PWF_ALT && deletehome && *home == '/' &&
1018             GETPWUID(id) == NULL &&
1019             fstatat(conf.rootfd, home + 1, &st, 0) != -1) {
1020                 rm_r(conf.rootfd, home, id);
1021                 pw_log(cnf, M_DELETE, W_USER, "%s(%ju) home '%s' %s"
1022                     "removed", name, (uintmax_t)id, home,
1023                      fstatat(conf.rootfd, home + 1, &st, 0) == -1 ? "" : "not "
1024                      "completely ");
1025         }
1026
1027         return (EXIT_SUCCESS);
1028 }
1029
1030 int
1031 pw_user_lock(int argc, char **argv, char *arg1)
1032 {
1033         int ch;
1034
1035         while ((ch = getopt(argc, argv, "Cq")) != -1) {
1036                 switch (ch) {
1037                 case 'C':
1038                 case 'q':
1039                         /* compatibility */
1040                         break;
1041                 }
1042         }
1043
1044         return (pw_userlock(arg1, M_LOCK));
1045 }
1046
1047 int
1048 pw_user_unlock(int argc, char **argv, char *arg1)
1049 {
1050         int ch;
1051
1052         while ((ch = getopt(argc, argv, "Cq")) != -1) {
1053                 switch (ch) {
1054                 case 'C':
1055                 case 'q':
1056                         /* compatibility */
1057                         break;
1058                 }
1059         }
1060
1061         return (pw_userlock(arg1, M_UNLOCK));
1062 }
1063
1064 static struct group *
1065 group_from_name_or_id(char *name)
1066 {
1067         const char *errstr = NULL;
1068         struct group *grp;
1069         uintmax_t id;
1070
1071         if ((grp = GETGRNAM(name)) == NULL) {
1072                 id = strtounum(name, 0, GID_MAX, &errstr);
1073                 if (errstr)
1074                         errx(EX_NOUSER, "group `%s' does not exist", name);
1075                 grp = GETGRGID(id);
1076                 if (grp == NULL)
1077                         errx(EX_NOUSER, "group `%s' does not exist", name);
1078         }
1079
1080         return (grp);
1081 }
1082
1083 static void
1084 split_groups(StringList **groups, char *groupsstr)
1085 {
1086         struct group *grp;
1087         char *p;
1088         char tok[] = ", \t";
1089
1090         if (*groups == NULL)
1091                 *groups = sl_init();
1092         for (p = strtok(groupsstr, tok); p != NULL; p = strtok(NULL, tok)) {
1093                 grp = group_from_name_or_id(p);
1094                 sl_add(*groups, newstr(grp->gr_name));
1095         }
1096 }
1097
1098 static void
1099 validate_grname(struct userconf *cnf, char *group)
1100 {
1101         struct group *grp;
1102
1103         if (group == NULL || *group == '\0') {
1104                 cnf->default_group = "";
1105                 return;
1106         }
1107         grp = group_from_name_or_id(group);
1108         cnf->default_group = newstr(grp->gr_name);
1109 }
1110
1111 static mode_t
1112 validate_mode(char *mode)
1113 {
1114         mode_t m;
1115         void *set;
1116
1117         if ((set = setmode(mode)) == NULL)
1118                 errx(EX_DATAERR, "invalid directory creation mode '%s'", mode);
1119
1120         m = getmode(set, _DEF_DIRMODE);
1121         free(set);
1122         return (m);
1123 }
1124
1125 static long
1126 validate_expire(char *str, int opt)
1127 {
1128         if (!numerics(str))
1129                 errx(EX_DATAERR, "-%c argument must be numeric "
1130                      "when setting defaults: %s", (char)opt, str);
1131         return strtol(str, NULL, 0);
1132 }
1133
1134 static void
1135 mix_config(struct userconf *cmdcnf, struct userconf *cfg)
1136 {
1137
1138         if (cmdcnf->default_password < 0)
1139                 cmdcnf->default_password = cfg->default_password;
1140         if (cmdcnf->reuse_uids == 0)
1141                 cmdcnf->reuse_uids = cfg->reuse_uids;
1142         if (cmdcnf->reuse_gids == 0)
1143                 cmdcnf->reuse_gids = cfg->reuse_gids;
1144         if (cmdcnf->nispasswd == NULL)
1145                 cmdcnf->nispasswd = cfg->nispasswd;
1146         if (cmdcnf->dotdir == NULL)
1147                 cmdcnf->dotdir = cfg->dotdir;
1148         if (cmdcnf->newmail == NULL)
1149                 cmdcnf->newmail = cfg->newmail;
1150         if (cmdcnf->logfile == NULL)
1151                 cmdcnf->logfile = cfg->logfile;
1152         if (cmdcnf->home == NULL)
1153                 cmdcnf->home = cfg->home;
1154         if (cmdcnf->homemode == 0)
1155                 cmdcnf->homemode = cfg->homemode;
1156         if (cmdcnf->shelldir == NULL)
1157                 cmdcnf->shelldir = cfg->shelldir;
1158         if (cmdcnf->shells == NULL)
1159                 cmdcnf->shells = cfg->shells;
1160         if (cmdcnf->shell_default == NULL)
1161                 cmdcnf->shell_default = cfg->shell_default;
1162         if (cmdcnf->default_group == NULL)
1163                 cmdcnf->default_group = cfg->default_group;
1164         if (cmdcnf->groups == NULL)
1165                 cmdcnf->groups = cfg->groups;
1166         if (cmdcnf->default_class == NULL)
1167                 cmdcnf->default_class = cfg->default_class;
1168         if (cmdcnf->min_uid == 0)
1169                 cmdcnf->min_uid = cfg->min_uid;
1170         if (cmdcnf->max_uid == 0)
1171                 cmdcnf->max_uid = cfg->max_uid;
1172         if (cmdcnf->min_gid == 0)
1173                 cmdcnf->min_gid = cfg->min_gid;
1174         if (cmdcnf->max_gid == 0)
1175                 cmdcnf->max_gid = cfg->max_gid;
1176         if (cmdcnf->expire_days < 0)
1177                 cmdcnf->expire_days = cfg->expire_days;
1178         if (cmdcnf->password_days < 0)
1179                 cmdcnf->password_days = cfg->password_days;
1180 }
1181
1182 int
1183 pw_user_add(int argc, char **argv, char *arg1)
1184 {
1185         struct userconf *cnf, *cmdcnf;
1186         struct passwd *pwd;
1187         struct group *grp;
1188         struct stat st;
1189         char args[] = "C:qn:u:c:d:e:p:g:G:mM:k:s:oL:i:w:h:H:Db:NPy:Y";
1190         char line[_PASSWORD_LEN+1], path[MAXPATHLEN];
1191         char *gecos, *homedir, *skel, *walk, *userid, *groupid, *grname;
1192         char *default_passwd, *name, *p;
1193         const char *cfg = NULL;
1194         login_cap_t *lc;
1195         FILE *pfp, *fp;
1196         intmax_t id = -1;
1197         time_t now;
1198         int rc, ch, fd = -1;
1199         size_t i;
1200         bool dryrun, nis, pretty, quiet, createhome, precrypted, genconf;
1201
1202         dryrun = nis = pretty = quiet = createhome = precrypted = false;
1203         genconf = false;
1204         gecos = homedir = skel = userid = groupid = default_passwd = NULL;
1205         grname = name = NULL;
1206
1207         if ((cmdcnf = calloc(1, sizeof(struct userconf))) == NULL)
1208                 err(EXIT_FAILURE, "calloc()");
1209
1210         cmdcnf->default_password = cmdcnf->expire_days = cmdcnf->password_days = -1;
1211         now = time(NULL);
1212
1213         if (arg1 != NULL) {
1214                 if (arg1[strspn(arg1, "0123456789")] == '\0')
1215                         id = pw_checkid(arg1, UID_MAX);
1216                 else
1217                         name = pw_checkname(arg1, 0);
1218         }
1219
1220         while ((ch = getopt(argc, argv, args)) != -1) {
1221                 switch (ch) {
1222                 case 'C':
1223                         cfg = optarg;
1224                         break;
1225                 case 'q':
1226                         quiet = true;
1227                         break;
1228                 case 'n':
1229                         name = pw_checkname(optarg, 0);
1230                         break;
1231                 case 'u':
1232                         userid = optarg;
1233                         break;
1234                 case 'c':
1235                         gecos = pw_checkname(optarg, 1);
1236                         break;
1237                 case 'd':
1238                         homedir = optarg;
1239                         break;
1240                 case 'e':
1241                         if (genconf)
1242                             cmdcnf->expire_days = validate_expire(optarg, ch);
1243                         else
1244                             cmdcnf->expire_days = parse_date(now, optarg);
1245                         break;
1246                 case 'p':
1247                         if (genconf)
1248                             cmdcnf->password_days = validate_expire(optarg, ch);
1249                         else
1250                             cmdcnf->password_days = parse_date(now, optarg);
1251                         break;
1252                 case 'g':
1253                         validate_grname(cmdcnf, optarg);
1254                         grname = optarg;
1255                         break;
1256                 case 'G':
1257                         split_groups(&cmdcnf->groups, optarg);
1258                         break;
1259                 case 'm':
1260                         createhome = true;
1261                         break;
1262                 case 'M':
1263                         cmdcnf->homemode = validate_mode(optarg);
1264                         break;
1265                 case 'k':
1266                         walk = skel = optarg;
1267                         if (*walk == '/')
1268                                 walk++;
1269                         if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1270                                 errx(EX_OSFILE, "skeleton `%s' does not "
1271                                     "exists", skel);
1272                         if (!S_ISDIR(st.st_mode))
1273                                 errx(EX_OSFILE, "skeleton `%s' is not a "
1274                                     "directory", skel);
1275                         cmdcnf->dotdir = skel;
1276                         break;
1277                 case 's':
1278                         cmdcnf->shell_default = optarg;
1279                         break;
1280                 case 'o':
1281                         conf.checkduplicate = false;
1282                         break;
1283                 case 'L':
1284                         cmdcnf->default_class = pw_checkname(optarg, 0);
1285                         break;
1286                 case 'i':
1287                         groupid = optarg;
1288                         break;
1289                 case 'w':
1290                         default_passwd = optarg;
1291                         break;
1292                 case 'H':
1293                         if (fd != -1)
1294                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1295                                     "exclusive options");
1296                         fd = pw_checkfd(optarg);
1297                         precrypted = true;
1298                         if (fd == '-')
1299                                 errx(EX_USAGE, "-H expects a file descriptor");
1300                         break;
1301                 case 'h':
1302                         if (fd != -1)
1303                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1304                                     "exclusive options");
1305                         fd = pw_checkfd(optarg);
1306                         break;
1307                 case 'D':
1308                         genconf = true;
1309                         break;
1310                 case 'b':
1311                         cmdcnf->home = optarg;
1312                         break;
1313                 case 'N':
1314                         dryrun = true;
1315                         break;
1316                 case 'P':
1317                         pretty = true;
1318                         break;
1319                 case 'y':
1320                         cmdcnf->nispasswd = optarg;
1321                         break;
1322                 case 'Y':
1323                         nis = true;
1324                         break;
1325                 }
1326         }
1327
1328         if (geteuid() != 0 && ! dryrun)
1329                 errx(EX_NOPERM, "you must be root");
1330
1331         if (quiet)
1332                 freopen(_PATH_DEVNULL, "w", stderr);
1333
1334         cnf = get_userconfig(cfg);
1335
1336         mix_config(cmdcnf, cnf);
1337         if (default_passwd)
1338                 cmdcnf->default_password = passwd_val(default_passwd,
1339                     cnf->default_password);
1340         if (genconf) {
1341                 if (name != NULL)
1342                         errx(EX_DATAERR, "can't combine `-D' with `-n name'");
1343                 if (userid != NULL) {
1344                         if ((p = strtok(userid, ", \t")) != NULL)
1345                                 cmdcnf->min_uid = pw_checkid(p, UID_MAX);
1346                         if (cmdcnf->min_uid == 0)
1347                                 cmdcnf->min_uid = 1000;
1348                         if ((p = strtok(NULL, " ,\t")) != NULL)
1349                                 cmdcnf->max_uid = pw_checkid(p, UID_MAX);
1350                         if (cmdcnf->max_uid == 0)
1351                                 cmdcnf->max_uid = 32000;
1352                 }
1353                 if (groupid != NULL) {
1354                         if ((p = strtok(groupid, ", \t")) != NULL)
1355                                 cmdcnf->min_gid = pw_checkid(p, GID_MAX);
1356                         if (cmdcnf->min_gid == 0)
1357                                 cmdcnf->min_gid = 1000;
1358                         if ((p = strtok(NULL, " ,\t")) != NULL)
1359                                 cmdcnf->max_gid = pw_checkid(p, GID_MAX);
1360                         if (cmdcnf->max_gid == 0)
1361                                 cmdcnf->max_gid = 32000;
1362                 }
1363                 if (write_userconfig(cmdcnf, cfg))
1364                         return (EXIT_SUCCESS);
1365                 err(EX_IOERR, "config update");
1366         }
1367
1368         if (userid)
1369                 id = pw_checkid(userid, UID_MAX);
1370         if (id < 0 && name == NULL)
1371                 errx(EX_DATAERR, "user name or id required");
1372
1373         if (name == NULL)
1374                 errx(EX_DATAERR, "login name required");
1375
1376         if (GETPWNAM(name) != NULL)
1377                 errx(EX_DATAERR, "login name `%s' already exists", name);
1378
1379         if (!grname)
1380                 grname = cmdcnf->default_group;
1381
1382         pwd = &fakeuser;
1383         pwd->pw_name = name;
1384         pwd->pw_class = cmdcnf->default_class ? cmdcnf->default_class : "";
1385         pwd->pw_uid = pw_uidpolicy(cmdcnf, id);
1386         pwd->pw_gid = pw_gidpolicy(cnf, grname, pwd->pw_name,
1387             (gid_t) pwd->pw_uid, dryrun);
1388
1389         /* cmdcnf->password_days and cmdcnf->expire_days hold unixtime here */
1390         if (cmdcnf->password_days > 0)
1391                 pwd->pw_change = cmdcnf->password_days;
1392         if (cmdcnf->expire_days > 0)
1393                 pwd->pw_expire = cmdcnf->expire_days;
1394
1395         pwd->pw_dir = pw_homepolicy(cmdcnf, homedir, pwd->pw_name);
1396         pwd->pw_shell = pw_shellpolicy(cmdcnf);
1397         lc = login_getpwclass(pwd);
1398         if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1399                 warn("setting crypt(3) format");
1400         login_close(lc);
1401         pwd->pw_passwd = pw_password(cmdcnf, pwd->pw_name, dryrun);
1402         if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1403                 warnx("WARNING: new account `%s' has a uid of 0 "
1404                     "(superuser access!)", pwd->pw_name);
1405         if (gecos)
1406                 pwd->pw_gecos = gecos;
1407
1408         if (fd != -1)
1409                 pw_set_passwd(pwd, fd, precrypted, false);
1410
1411         if (dryrun)
1412                 return (print_user(pwd, pretty, false));
1413
1414         if ((rc = addpwent(pwd)) != 0) {
1415                 if (rc == -1)
1416                         errx(EX_IOERR, "user '%s' already exists",
1417                             pwd->pw_name);
1418                 else if (rc != 0)
1419                         err(EX_IOERR, "passwd file update");
1420         }
1421         if (nis && cmdcnf->nispasswd && *cmdcnf->nispasswd == '/') {
1422                 printf("%s\n", cmdcnf->nispasswd);
1423                 rc = addnispwent(cmdcnf->nispasswd, pwd);
1424                 if (rc == -1)
1425                         warnx("User '%s' already exists in NIS passwd",
1426                             pwd->pw_name);
1427                 else if (rc != 0)
1428                         warn("NIS passwd update");
1429                 /* NOTE: we treat NIS-only update errors as non-fatal */
1430         }
1431
1432         if (cmdcnf->groups != NULL) {
1433                 for (i = 0; i < cmdcnf->groups->sl_cur; i++) {
1434                         grp = GETGRNAM(cmdcnf->groups->sl_str[i]);
1435                         grp = gr_add(grp, pwd->pw_name);
1436                         /*
1437                          * grp can only be NULL in 2 cases:
1438                          * - the new member is already a member
1439                          * - a problem with memory occurs
1440                          * in both cases we want to skip now.
1441                          */
1442                         if (grp == NULL)
1443                                 continue;
1444                         chggrent(grp->gr_name, grp);
1445                         free(grp);
1446                 }
1447         }
1448
1449         pwd = GETPWNAM(name);
1450         if (pwd == NULL)
1451                 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1452
1453         grp = GETGRGID(pwd->pw_gid);
1454         pw_log(cnf, M_ADD, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1455                pwd->pw_name, (uintmax_t)pwd->pw_uid,
1456             grp ? grp->gr_name : "unknown",
1457                (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1458                pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1459
1460         /*
1461          * let's touch and chown the user's mail file. This is not
1462          * strictly necessary under BSD with a 0755 maildir but it also
1463          * doesn't hurt anything to create the empty mailfile
1464          */
1465         if (PWALTDIR() != PWF_ALT) {
1466                 snprintf(path, sizeof(path), "%s/%s", _PATH_MAILDIR,
1467                     pwd->pw_name);
1468                 /* Preserve contents & mtime */
1469                 close(openat(conf.rootfd, path +1, O_RDWR | O_CREAT, 0600));
1470                 fchownat(conf.rootfd, path + 1, pwd->pw_uid, pwd->pw_gid,
1471                     AT_SYMLINK_NOFOLLOW);
1472         }
1473
1474         /*
1475          * Let's create and populate the user's home directory. Note
1476          * that this also `works' for editing users if -m is used, but
1477          * existing files will *not* be overwritten.
1478          */
1479         if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1480             *pwd->pw_dir == '/' && pwd->pw_dir[1])
1481                 create_and_populate_homedir(cmdcnf, pwd, cmdcnf->dotdir,
1482                     cmdcnf->homemode, false);
1483
1484         if (!PWALTDIR() && cmdcnf->newmail && *cmdcnf->newmail &&
1485             (fp = fopen(cnf->newmail, "r")) != NULL) {
1486                 if ((pfp = popen(_PATH_SENDMAIL " -t", "w")) == NULL)
1487                         warn("sendmail");
1488                 else {
1489                         fprintf(pfp, "From: root\n" "To: %s\n"
1490                             "Subject: Welcome!\n\n", pwd->pw_name);
1491                         while (fgets(line, sizeof(line), fp) != NULL) {
1492                                 /* Do substitutions? */
1493                                 fputs(line, pfp);
1494                         }
1495                         pclose(pfp);
1496                         pw_log(cnf, M_ADD, W_USER, "%s(%ju) new user mail sent",
1497                             pwd->pw_name, (uintmax_t)pwd->pw_uid);
1498                 }
1499                 fclose(fp);
1500         }
1501
1502         if (nis && nis_update() == 0)
1503                 pw_log(cnf, M_ADD, W_USER, "NIS maps updated");
1504
1505         return (EXIT_SUCCESS);
1506 }
1507
1508 int
1509 pw_user_mod(int argc, char **argv, char *arg1)
1510 {
1511         struct userconf *cnf;
1512         struct passwd *pwd;
1513         struct group *grp;
1514         StringList *groups = NULL;
1515         char args[] = "C:qn:u:c:d:e:p:g:G:mM:l:k:s:w:L:h:H:NPYy:";
1516         const char *cfg = NULL;
1517         char *gecos, *homedir, *grname, *name, *newname, *walk, *skel, *shell;
1518         char *passwd, *class, *nispasswd;
1519         login_cap_t *lc;
1520         struct stat st;
1521         intmax_t id = -1;
1522         int ch, fd = -1;
1523         size_t i, j;
1524         bool quiet, createhome, pretty, dryrun, nis, edited;
1525         bool precrypted;
1526         mode_t homemode = 0;
1527         time_t expire_time, password_time, now;
1528
1529         expire_time = password_time = -1;
1530         gecos = homedir = grname = name = newname = skel = shell =NULL;
1531         passwd = NULL;
1532         class = nispasswd = NULL;
1533         quiet = createhome = pretty = dryrun = nis = precrypted = false;
1534         edited = false;
1535         now = time(NULL);
1536
1537         if (arg1 != NULL) {
1538                 if (arg1[strspn(arg1, "0123456789")] == '\0')
1539                         id = pw_checkid(arg1, UID_MAX);
1540                 else
1541                         name = arg1;
1542         }
1543
1544         while ((ch = getopt(argc, argv, args)) != -1) {
1545                 switch (ch) {
1546                 case 'C':
1547                         cfg = optarg;
1548                         break;
1549                 case 'q':
1550                         quiet = true;
1551                         break;
1552                 case 'n':
1553                         name = optarg;
1554                         break;
1555                 case 'u':
1556                         id = pw_checkid(optarg, UID_MAX);
1557                         break;
1558                 case 'c':
1559                         gecos = pw_checkname(optarg, 1);
1560                         break;
1561                 case 'd':
1562                         homedir = optarg;
1563                         break;
1564                 case 'e':
1565                         expire_time = parse_date(now, optarg);
1566                         break;
1567                 case 'p':
1568                         password_time = parse_date(now, optarg);
1569                         break;
1570                 case 'g':
1571                         group_from_name_or_id(optarg);
1572                         grname = optarg;
1573                         break;
1574                 case 'G':
1575                         split_groups(&groups, optarg);
1576                         break;
1577                 case 'm':
1578                         createhome = true;
1579                         break;
1580                 case 'M':
1581                         homemode = validate_mode(optarg);
1582                         break;
1583                 case 'l':
1584                         newname = optarg;
1585                         break;
1586                 case 'k':
1587                         walk = skel = optarg;
1588                         if (*walk == '/')
1589                                 walk++;
1590                         if (fstatat(conf.rootfd, walk, &st, 0) == -1)
1591                                 errx(EX_OSFILE, "skeleton `%s' does not "
1592                                     "exists", skel);
1593                         if (!S_ISDIR(st.st_mode))
1594                                 errx(EX_OSFILE, "skeleton `%s' is not a "
1595                                     "directory", skel);
1596                         break;
1597                 case 's':
1598                         shell = optarg;
1599                         break;
1600                 case 'w':
1601                         passwd = optarg;
1602                         break;
1603                 case 'L':
1604                         class = pw_checkname(optarg, 0);
1605                         break;
1606                 case 'H':
1607                         if (fd != -1)
1608                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1609                                     "exclusive options");
1610                         fd = pw_checkfd(optarg);
1611                         precrypted = true;
1612                         if (fd == '-')
1613                                 errx(EX_USAGE, "-H expects a file descriptor");
1614                         break;
1615                 case 'h':
1616                         if (fd != -1)
1617                                 errx(EX_USAGE, "'-h' and '-H' are mutually "
1618                                     "exclusive options");
1619                         fd = pw_checkfd(optarg);
1620                         break;
1621                 case 'N':
1622                         dryrun = true;
1623                         break;
1624                 case 'P':
1625                         pretty = true;
1626                         break;
1627                 case 'y':
1628                         nispasswd = optarg;
1629                         break;
1630                 case 'Y':
1631                         nis = true;
1632                         break;
1633                 }
1634         }
1635
1636         if (geteuid() != 0 && ! dryrun)
1637                 errx(EX_NOPERM, "you must be root");
1638
1639         if (quiet)
1640                 freopen(_PATH_DEVNULL, "w", stderr);
1641
1642         cnf = get_userconfig(cfg);
1643
1644         if (id < 0 && name == NULL)
1645                 errx(EX_DATAERR, "username or id required");
1646
1647         pwd = (name != NULL) ? GETPWNAM(pw_checkname(name, 0)) : GETPWUID(id);
1648         if (pwd == NULL) {
1649                 if (name == NULL)
1650                         errx(EX_NOUSER, "no such uid `%ju'",
1651                             (uintmax_t) id);
1652                 errx(EX_NOUSER, "no such user `%s'", name);
1653         }
1654
1655         if (name == NULL)
1656                 name = pwd->pw_name;
1657
1658         if (nis && nispasswd == NULL)
1659                 nispasswd = cnf->nispasswd;
1660
1661         if (PWF._altdir == PWF_REGULAR &&
1662             ((pwd->pw_fields & _PWF_SOURCE) != _PWF_FILES)) {
1663                 if ((pwd->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
1664                         if (!nis && nispasswd && *nispasswd != '/')
1665                                 errx(EX_NOUSER, "Cannot modify NIS user `%s'",
1666                                     name);
1667                 } else {
1668                         errx(EX_NOUSER, "Cannot modify non local user `%s'",
1669                             name);
1670                 }
1671         }
1672
1673         if (newname) {
1674                 if (strcmp(pwd->pw_name, "root") == 0)
1675                         errx(EX_DATAERR, "can't rename `root' account");
1676                 if (strcmp(pwd->pw_name, newname) != 0) {
1677                         pwd->pw_name = pw_checkname(newname, 0);
1678                         edited = true;
1679                 }
1680         }
1681
1682         if (id >= 0 && pwd->pw_uid != id) {
1683                 pwd->pw_uid = id;
1684                 edited = true;
1685                 if (pwd->pw_uid != 0 && strcmp(pwd->pw_name, "root") == 0)
1686                         errx(EX_DATAERR, "can't change uid of `root' account");
1687                 if (pwd->pw_uid == 0 && strcmp(pwd->pw_name, "root") != 0)
1688                         warnx("WARNING: account `%s' will have a uid of 0 "
1689                             "(superuser access!)", pwd->pw_name);
1690         }
1691
1692         if (grname && pwd->pw_uid != 0) {
1693                 grp = GETGRNAM(grname);
1694                 if (grp == NULL)
1695                         grp = GETGRGID(pw_checkid(grname, GID_MAX));
1696                 if (grp->gr_gid != pwd->pw_gid) {
1697                         pwd->pw_gid = grp->gr_gid;
1698                         edited = true;
1699                 }
1700         }
1701
1702
1703         if (password_time >= 0 && pwd->pw_change != password_time) {
1704                 pwd->pw_change = password_time;
1705                 edited = true;
1706         }
1707
1708         if (expire_time >= 0 && pwd->pw_expire != expire_time) {
1709                 pwd->pw_expire = expire_time;
1710                 edited = true;
1711         }
1712
1713         if (shell) {
1714                 shell = shell_path(cnf->shelldir, cnf->shells, shell);
1715                 if (shell == NULL)
1716                         shell = "";
1717                 if (strcmp(shell, pwd->pw_shell) != 0) {
1718                         pwd->pw_shell = shell;
1719                         edited = true;
1720                 }
1721         }
1722
1723         if (class && strcmp(pwd->pw_class, class) != 0) {
1724                 pwd->pw_class = class;
1725                 edited = true;
1726         }
1727
1728         if (homedir && strcmp(pwd->pw_dir, homedir) != 0) {
1729                 pwd->pw_dir = homedir;
1730                 edited = true;
1731                 if (fstatat(conf.rootfd, pwd->pw_dir, &st, 0) == -1) {
1732                         if (!createhome)
1733                                 warnx("WARNING: home `%s' does not exist",
1734                                     pwd->pw_dir);
1735                 } else if (!S_ISDIR(st.st_mode)) {
1736                         warnx("WARNING: home `%s' is not a directory",
1737                             pwd->pw_dir);
1738                 }
1739         }
1740
1741         if (passwd && conf.fd == -1) {
1742                 lc = login_getpwclass(pwd);
1743                 if (lc == NULL || login_setcryptfmt(lc, "sha512", NULL) == NULL)
1744                         warn("setting crypt(3) format");
1745                 login_close(lc);
1746                 cnf->default_password = passwd_val(passwd,
1747                     cnf->default_password);
1748                 pwd->pw_passwd = pw_password(cnf, pwd->pw_name, dryrun);
1749                 edited = true;
1750         }
1751
1752         if (gecos && strcmp(pwd->pw_gecos, gecos) != 0) {
1753                 pwd->pw_gecos = gecos;
1754                 edited = true;
1755         }
1756
1757         if (fd != -1)
1758                 edited = pw_set_passwd(pwd, fd, precrypted, true);
1759
1760         if (dryrun)
1761                 return (print_user(pwd, pretty, false));
1762
1763         if (edited) /* Only updated this if required */
1764                 perform_chgpwent(name, pwd, nis ? nispasswd : NULL);
1765         /* Now perform the needed changes concern groups */
1766         if (groups != NULL) {
1767                 /* Delete User from groups using old name */
1768                 SETGRENT();
1769                 while ((grp = GETGRENT()) != NULL) {
1770                         if (grp->gr_mem == NULL)
1771                                 continue;
1772                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
1773                                 if (strcmp(grp->gr_mem[i] , name) != 0)
1774                                         continue;
1775                                 for (j = i; grp->gr_mem[j] != NULL ; j++)
1776                                         grp->gr_mem[j] = grp->gr_mem[j+1];
1777                                 chggrent(grp->gr_name, grp);
1778                                 break;
1779                         }
1780                 }
1781                 ENDGRENT();
1782                 /* Add the user to the needed groups */
1783                 for (i = 0; i < groups->sl_cur; i++) {
1784                         grp = GETGRNAM(groups->sl_str[i]);
1785                         grp = gr_add(grp, pwd->pw_name);
1786                         if (grp == NULL)
1787                                 continue;
1788                         chggrent(grp->gr_name, grp);
1789                         free(grp);
1790                 }
1791         }
1792         /* In case of rename we need to walk over the different groups */
1793         if (newname) {
1794                 SETGRENT();
1795                 while ((grp = GETGRENT()) != NULL) {
1796                         if (grp->gr_mem == NULL)
1797                                 continue;
1798                         for (i = 0; grp->gr_mem[i] != NULL; i++) {
1799                                 if (strcmp(grp->gr_mem[i], name) != 0)
1800                                         continue;
1801                                 grp->gr_mem[i] = newname;
1802                                 chggrent(grp->gr_name, grp);
1803                                 break;
1804                         }
1805                 }
1806         }
1807
1808         /* go get a current version of pwd */
1809         if (newname)
1810                 name = newname;
1811         pwd = GETPWNAM(name);
1812         if (pwd == NULL)
1813                 errx(EX_NOUSER, "user '%s' disappeared during update", name);
1814         grp = GETGRGID(pwd->pw_gid);
1815         pw_log(cnf, M_UPDATE, W_USER, "%s(%ju):%s(%ju):%s:%s:%s",
1816             pwd->pw_name, (uintmax_t)pwd->pw_uid,
1817             grp ? grp->gr_name : "unknown",
1818             (uintmax_t)(grp ? grp->gr_gid : (uid_t)-1),
1819             pwd->pw_gecos, pwd->pw_dir, pwd->pw_shell);
1820
1821         /*
1822          * Let's create and populate the user's home directory. Note
1823          * that this also `works' for editing users if -m is used, but
1824          * existing files will *not* be overwritten.
1825          */
1826         if (PWALTDIR() != PWF_ALT && createhome && pwd->pw_dir &&
1827             *pwd->pw_dir == '/' && pwd->pw_dir[1]) {
1828                 if (!skel)
1829                         skel = cnf->dotdir;
1830                 if (homemode == 0)
1831                         homemode = cnf->homemode;
1832                 create_and_populate_homedir(cnf, pwd, skel, homemode, true);
1833         }
1834
1835         if (nis && nis_update() == 0)
1836                 pw_log(cnf, M_UPDATE, W_USER, "NIS maps updated");
1837
1838         return (EXIT_SUCCESS);
1839 }