pwd_mkdb.tproj/pwd_mkdb.c

   1 /*      $OpenBSD: pwd_mkdb.c,v 1.36 2003/06/08 21:14:55 millert Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Portions Copyright (c) 1994, Jason Downs.  All rights reserved.
   7  * Portions Copyright (c) 1998, Todd C. Miller.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1991, 1993, 1994\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static const char sccsid[] = "from: @(#)pwd_mkdb.c      8.5 (Berkeley) 4/20/94";
  43 #else
  44 static const char rcsid[] = "$OpenBSD: pwd_mkdb.c,v 1.36 2003/06/08 21:14:55 millert Exp $";
  45 #endif
  46 #endif /* not lint */
  47
  48 #include <sys/param.h>
  49 #include <sys/stat.h>
  50
  51 #include <db.h>
  52 #include <err.h>
  53 #include <errno.h>
  54 #include <fcntl.h>
  55 #include <grp.h>
  56 #include <limits.h>
  57 #include <pwd.h>
  58 #include <signal.h>
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <unistd.h>
  63 #include <util.h>
  64 #include <sys/param.h>
  65
  66 #define INSECURE        1
  67 #define SECURE          2
  68 #define PERM_INSECURE   (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
  69 #define PERM_SECURE     (S_IRUSR|S_IWUSR)
  70
  71 #define FILE_SECURE     0x01
  72 #define FILE_INSECURE   0x02
  73 #define FILE_ORIG       0x04
  74
  75 #define SHADOW_GROUP    "wheel"
  76
  77 HASHINFO openinfo = {
  78         4096,           /* bsize */
  79         32,             /* ffactor */
  80         256,            /* nelem */
  81         2048 * 1024,    /* cachesize */
  82         NULL,           /* hash() */
  83         0               /* lorder */
  84 };
  85
  86 static char *pname;                             /* password file name */
  87 static char *basedir;                           /* dir holding master.passwd */
  88 static int clean;                               /* what to remove on cleanup */
  89 static int hasyp;                               /* are we running YP? */
  90
  91 void    cleanup(void);
  92 void    error(char *);
  93 void    errorx(char *);
  94 void    cp(char *, char *, mode_t);
  95 void    mv(char *, char *);
  96 int     scan(FILE *, struct passwd *, int *);
  97 void    usage(void);
  98 char    *changedir(char *path, char *dir);
  99 void    db_store(FILE *, FILE *, DB *, DB *,struct passwd *, int, char *, uid_t);
 100
 101 int
 102 main(int argc, char **argv)
 103 {
 104         DB *dp, *edp;
 105         DBT data, key;
 106         FILE *fp, *oldfp = NULL;
 107         struct stat st;
 108         struct passwd pwd;
 109         struct group *grp;
 110         sigset_t set;
 111         uid_t olduid;
 112         gid_t shadow;
 113         int ch, tfd, makeold, secureonly, flags, checkonly;
 114         char *username, buf[MAX(MAXPATHLEN, LINE_MAX * 2)];
 115
 116         flags = checkonly = makeold = secureonly = 0;
 117         username = NULL;
 118         while ((ch = getopt(argc, argv, "cd:psu:v")) != -1)
 119                 switch (ch) {
 120                 case 'c':                       /* verify only */
 121                         checkonly = 1;
 122                         break;
 123                 case 'd':
 124                         basedir = optarg;
 125                         if (strlen(basedir) > MAXPATHLEN - 40)
 126                                 errx(1, "basedir too long");
 127                         break;
 128                 case 'p':                       /* create V7 "file.orig" */
 129                         makeold = 1;
 130                         break;
 131                 case 's':                       /* only update spwd.db */
 132                         secureonly = 1;
 133                         break;
 134                 case 'u':                       /* only update this record */
 135                         username = optarg;
 136                         if (strlen(username) > _PW_NAME_LEN)
 137                                 errx(1, "username too long");
 138                         break;
 139                 case 'v':                       /* backward compatible */
 140                         break;
 141                 case '?':
 142                 default:
 143                         usage();
 144                 }
 145         argc -= optind;
 146         argv += optind;
 147
 148         if (argc != 1 || (makeold && secureonly) ||
 149             (username && (*username == '+' || *username == '-')))
 150                 usage();
 151
 152         if ((grp = getgrnam(SHADOW_GROUP)) == NULL)
 153                 errx(1, "cannot find `%s' in the group database, aborting",
 154                     SHADOW_GROUP);
 155         shadow = grp->gr_gid;
 156
 157         /*
 158          * This could be changed to allow the user to interrupt.
 159          * Probably not worth the effort.
 160          */
 161         sigemptyset(&set);
 162         sigaddset(&set, SIGTSTP);
 163         sigaddset(&set, SIGHUP);
 164         sigaddset(&set, SIGINT);
 165         sigaddset(&set, SIGQUIT);
 166         sigaddset(&set, SIGTERM);
 167         (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
 168
 169         /* We don't care what the user wants. */
 170         (void)umask(0);
 171
 172         if (**argv != '/' && basedir == NULL)
 173                 errx(1, "%s must be specified as an absolute path", *argv);
 174
 175         if ((pname = strdup(changedir(*argv, basedir))) == NULL)
 176                 err(1, NULL);
 177         /* Open the original password file */
 178         if (!(fp = fopen(pname, "r")))
 179                 error(pname);
 180
 181         /* Check only if password database is valid */
 182         if (checkonly) {
 183                 u_int cnt;
 184
 185                 for (cnt = 1; scan(fp, &pwd, &flags); ++cnt)
 186                         ;
 187                 exit(0);
 188         }
 189
 190         if (fstat(fileno(fp), &st) == -1)
 191                 error(pname);
 192
 193         /* Tweak openinfo values for large passwd files. */
 194         if (st.st_size > (off_t)100*1024)
 195                 openinfo.cachesize = MIN(st.st_size * 20, (off_t)12*1024*1024);
 196         if (st.st_size / 128 > openinfo.nelem)
 197                 openinfo.nelem = st.st_size / 128;
 198
 199         /* If only updating a single record, stash the old uid */
 200         if (username) {
 201                 dp = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
 202                 if (dp == NULL)
 203                         error(_PATH_MP_DB);
 204                 buf[0] = _PW_KEYBYNAME;
 205                 strlcpy(buf + 1, username, sizeof(buf) - 1);
 206                 key.data = (u_char *)buf;
 207                 key.size = strlen(buf + 1) + 1;
 208                 if ((dp->get)(dp, &key, &data, 0) == 0) {
 209                         char *p = (char *)data.data;
 210                         /* Skip to uid field */
 211                         while (*p++ != '\0')
 212                                 ;
 213                         while (*p++ != '\0')
 214                                 ;
 215                         memcpy(&olduid, p, sizeof(olduid));
 216                 } else
 217                         olduid = UID_MAX;
 218                 (dp->close)(dp);
 219         }
 220
 221         /* Open the temporary encrypted password database. */
 222         (void)snprintf(buf, sizeof(buf), "%s.tmp",
 223             changedir(_PATH_SMP_DB, basedir));
 224         if (username) {
 225                 cp(changedir(_PATH_SMP_DB, basedir), buf, PERM_SECURE);
 226                 edp = dbopen(buf,
 227                     O_RDWR, PERM_SECURE, DB_HASH, &openinfo);
 228         } else {
 229                 edp = dbopen(buf,
 230                     O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
 231         }
 232         if (!edp)
 233                 error(buf);
 234         if (fchown(edp->fd(edp), (uid_t)-1, shadow) != 0)
 235                 warn("%s: unable to set group to %s", _PATH_SMP_DB,
 236                     SHADOW_GROUP);
 237         else if (fchmod(edp->fd(edp), PERM_SECURE|S_IRGRP) != 0)
 238                 warn("%s: unable to make group readable", _PATH_SMP_DB);
 239         clean |= FILE_SECURE;
 240
 241         /* Open the temporary insecure password database. */
 242         if (!secureonly) {
 243                 (void)snprintf(buf, sizeof(buf), "%s.tmp",
 244                     changedir(_PATH_MP_DB, basedir));
 245                 if (username) {
 246                         cp(changedir(_PATH_MP_DB, basedir), buf, PERM_INSECURE);
 247                         dp = dbopen(buf, O_RDWR, PERM_INSECURE, DB_HASH,
 248                             &openinfo);
 249                 } else {
 250                         dp = dbopen(buf, O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE,
 251                             DB_HASH, &openinfo);
 252                 }
 253                 if (dp == NULL)
 254                         error(buf);
 255                 clean |= FILE_INSECURE;
 256         } else
 257                 dp = NULL;
 258
 259         /*
 260          * Open file for old password file.  Minor trickiness -- don't want to
 261          * chance the file already existing, since someone (stupidly) might
 262          * still be using this for permission checking.  So, open it first and
 263          * fdopen the resulting fd.  The resulting file should be readable by
 264          * everyone.
 265          */
 266         if (makeold) {
 267                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
 268                 if ((tfd = open(buf,
 269                     O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
 270                         error(buf);
 271                 if ((oldfp = fdopen(tfd, "w")) == NULL)
 272                         error(buf);
 273                 clean |= FILE_ORIG;
 274         }
 275
 276         /*
 277          * The databases actually contain three copies of the original data.
 278          * Each password file entry is converted into a rough approximation
 279          * of a ``struct passwd'', with the strings placed inline.  This
 280          * object is then stored as the data for three separate keys.  The
 281          * first key * is the pw_name field prepended by the _PW_KEYBYNAME
 282          * character.  The second key is the pw_uid field prepended by the
 283          * _PW_KEYBYUID character.  The third key is the line number in the
 284          * original file prepended by the _PW_KEYBYNUM character.  (The special
 285          * characters are prepended to ensure that the keys do not collide.)
 286          *
 287          * If we see something go by that looks like YP, we save a special
 288          * pointer record, which if YP is enabled in the C lib, will speed
 289          * things up.
 290          */
 291
 292         /*
 293          * Write the .db files.
 294          * We do this three times, one per key type (for getpw{nam,uid,ent}).
 295          * The first time through we also check for YP, issue warnings
 296          * and save the V7 format passwd file if necessary.
 297          */
 298         db_store(fp, oldfp, edp, dp, &pwd, _PW_KEYBYNAME, username, olduid);
 299         db_store(fp, oldfp, edp, dp, &pwd, _PW_KEYBYUID, username, olduid);
 300         db_store(fp, oldfp, edp, dp, &pwd, _PW_KEYBYNUM, username, olduid);
 301
 302         /* Store YP token, if needed. */
 303         if (hasyp && !username) {
 304                 key.data = (u_char *)_PW_YPTOKEN;
 305                 key.size = strlen(_PW_YPTOKEN);
 306                 data.data = (u_char *)NULL;
 307                 data.size = 0;
 308
 309                 if ((edp->put)(edp, &key, &data, R_NOOVERWRITE) == -1)
 310                         error("put");
 311
 312                 if (dp && (dp->put)(dp, &key, &data, R_NOOVERWRITE) == -1)
 313                         error("put");
 314         }
 315
 316         if ((edp->close)(edp))
 317                 error("close edp");
 318         if (dp && (dp->close)(dp))
 319                 error("close dp");
 320         if (makeold) {
 321                 if (fclose(oldfp) == EOF)
 322                         error("close old");
 323         }
 324
 325         /* Set master.passwd permissions, in case caller forgot. */
 326         (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR);
 327         if (fclose(fp) != 0)
 328                 error("fclose");
 329
 330         /* Install as the real password files. */
 331         if (!secureonly) {
 332                 (void)snprintf(buf, sizeof(buf), "%s.tmp",
 333                     changedir(_PATH_MP_DB, basedir));
 334                 mv(buf, changedir(_PATH_MP_DB, basedir));
 335         }
 336         (void)snprintf(buf, sizeof(buf), "%s.tmp",
 337             changedir(_PATH_SMP_DB, basedir));
 338         mv(buf, changedir(_PATH_SMP_DB, basedir));
 339         if (makeold) {
 340                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
 341                 mv(buf, changedir(_PATH_PASSWD, basedir));
 342         }
 343
 344         /*
 345          * Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
 346          * all use flock(2) on it to block other incarnations of themselves.
 347          * The rename means that everything is unlocked, as the original file
 348          * can no longer be accessed.
 349          */
 350         mv(pname, changedir(_PATH_MASTERPASSWD, basedir));
 351         exit(0);
 352 }
 353
 354 int
 355 scan(FILE *fp, struct passwd *pw, int *flags)
 356 {
 357         static int lcnt;
 358         static char line[LINE_MAX];
 359         char *p;
 360
 361         if (fgets(line, sizeof(line), fp) == NULL)
 362                 return (0);
 363         ++lcnt;
 364         /*
 365          * ``... if I swallow anything evil, put your fingers down my
 366          * throat...''
 367          *      -- The Who
 368          */
 369         p = line;
 370         if (*p != '\0' && *(p += strlen(line) - 1) != '\n') {
 371                 warnx("line too long");
 372                 goto fmt;
 373         }
 374         *p = '\0';
 375         *flags = 0;
 376         if (!pw_scan(line, pw, flags)) {
 377                 warnx("at line #%d", lcnt);
 378 fmt:            errno = EFTYPE; /* XXX */
 379                 error(pname);
 380         }
 381
 382         return (1);
 383 }
 384
 385 void
 386 cp(from, to, mode)
 387         char *from, *to;
 388         mode_t mode;
 389 {
 390         static char buf[MAXBSIZE];
 391         int from_fd, rcount, to_fd, wcount;
 392
 393         if ((from_fd = open(from, O_RDONLY, 0)) < 0)
 394                 error(from);
 395         if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0)
 396                 error(to);
 397         while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
 398                 wcount = write(to_fd, buf, rcount);
 399                 if (rcount != wcount || wcount == -1) {
 400                         int sverrno = errno;
 401
 402                         (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
 403                         errno = sverrno;
 404                         error(buf);
 405                 }
 406         }
 407         if (rcount < 0) {
 408                 int sverrno = errno;
 409
 410                 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
 411                 errno = sverrno;
 412                 error(buf);
 413         }
 414 }
 415
 416 void
 417 mv(from, to)
 418         char *from, *to;
 419 {
 420         char buf[MAXPATHLEN * 2];
 421
 422         if (rename(from, to)) {
 423                 int sverrno = errno;
 424
 425                 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
 426                 errno = sverrno;
 427                 error(buf);
 428         }
 429 }
 430
 431 void
 432 error(name)
 433         char *name;
 434 {
 435
 436         warn("%s", name);
 437         cleanup();
 438         exit(1);
 439 }
 440
 441 void
 442 errorx(name)
 443         char *name;
 444 {
 445
 446         warnx("%s", name);
 447         cleanup();
 448         exit(1);
 449 }
 450
 451 void
 452 cleanup()
 453 {
 454         char buf[MAXPATHLEN];
 455
 456         if (clean & FILE_ORIG) {
 457                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
 458                 (void)unlink(buf);
 459         }
 460         if (clean & FILE_SECURE) {
 461                 (void)snprintf(buf, sizeof(buf), "%s.tmp",
 462                     changedir(_PATH_SMP_DB, basedir));
 463                 (void)unlink(buf);
 464         }
 465         if (clean & FILE_INSECURE) {
 466                 (void)snprintf(buf, sizeof(buf), "%s.tmp",
 467                     changedir(_PATH_MP_DB, basedir));
 468                 (void)unlink(buf);
 469         }
 470 }
 471
 472 void
 473 usage(void)
 474 {
 475
 476         (void)fprintf(stderr,
 477             "usage: pwd_mkdb [-c] [-p | -s] [-d basedir] [-u username] file\n");
 478         exit(1);
 479 }
 480
 481 char *
 482 changedir(char *path, char *dir)
 483 {
 484         static char fixed[MAXPATHLEN];
 485         char *p;
 486
 487         if (!dir)
 488                 return (path);
 489
 490         if ((p = strrchr(path, '/')) != NULL)
 491                 path = p + 1;
 492         snprintf(fixed, sizeof(fixed), "%s/%s", dir, path);
 493         return (fixed);
 494 }
 495
 496 void
 497 db_store(FILE *fp, FILE *oldfp, DB *edp, DB *dp, struct passwd *pw,
 498          int keytype, char *username, uid_t olduid)
 499 {
 500         int flags = 0;
 501         int dbmode, found = 0;
 502         u_int cnt;
 503         char *p, *t, buf[LINE_MAX * 2], tbuf[1024];
 504         DBT data, key;
 505         size_t len;
 506         static int firsttime = 1;
 507
 508         /* If given a username just add that record to the existing db. */
 509         dbmode = username ? 0 : R_NOOVERWRITE;
 510
 511         rewind(fp);
 512         data.data = (u_char *)buf;
 513         key.data = (u_char *)tbuf;
 514         for (cnt = 1; scan(fp, pw, &flags); ++cnt) {
 515
 516 #ifdef __APPLE__
 517                 if (pw->pw_name == NULL)
 518                         continue;
 519 #endif
 520
 521                 if (firsttime) {
 522                         /* Look like YP? */
 523                         if ((pw->pw_name[0] == '+') || (pw->pw_name[0] == '-'))
 524                                 hasyp++;
 525
 526                         /* Warn about potentially unsafe uid/gid overrides. */
 527                         if (pw->pw_name[0] == '+') {
 528                                 if (!(flags & _PASSWORD_NOUID) && !pw->pw_uid)
 529                                         warnx("line %d: superuser override in "
 530                                             "YP inclusion", cnt);
 531                                 if (!(flags & _PASSWORD_NOGID) && !pw->pw_gid)
 532                                         warnx("line %d: wheel override in "
 533                                             "YP inclusion", cnt);
 534                         }
 535
 536                         /* Create V7 format password file entry. */
 537                         if (oldfp != NULL)
 538                                 if (fprintf(oldfp, "%s:*:%u:%u:%s:%s:%s\n",
 539                                     pw->pw_name, pw->pw_uid, pw->pw_gid,
 540                                     pw->pw_gecos, pw->pw_dir, pw->pw_shell)
 541                                     == EOF)
 542                                         error("write old");
 543                 }
 544
 545                 /* Are we updating a specific record? */
 546                 if (username) {
 547                         if (strcmp(username, pw->pw_name) != 0)
 548                                 continue;
 549                         found = 1;
 550                         /* If the uid changed, remove the old record by uid. */
 551                         if (olduid != UID_MAX && olduid != pw->pw_uid) {
 552                                 tbuf[0] = _PW_KEYBYUID;
 553                                 memcpy(tbuf + 1, &olduid, sizeof(olduid));
 554                                 key.size = sizeof(olduid) + 1;
 555                                 (edp->del)(edp, &key, 0);
 556                                 if (dp)
 557                                         (dp->del)(dp, &key, 0);
 558                         }
 559                         /* XXX - should check to see if line number changed. */
 560                 }
 561
 562                 /* Build the key. */
 563                 tbuf[0] = keytype;
 564                 switch (keytype) {
 565                 case _PW_KEYBYNUM:
 566                         memmove(tbuf + 1, &cnt, sizeof(cnt));
 567                         key.size = sizeof(cnt) + 1;
 568                         break;
 569
 570                 case _PW_KEYBYNAME:
 571                         len = strlen(pw->pw_name);
 572                         memmove(tbuf + 1, pw->pw_name, len);
 573                         key.size = len + 1;
 574                         break;
 575
 576                 case _PW_KEYBYUID:
 577                         memmove(tbuf + 1, &pw->pw_uid, sizeof(pw->pw_uid));
 578                         key.size = sizeof(pw->pw_uid) + 1;
 579                         break;
 580                 }
 581
 582 #define COMPACT(e)      t = e; while ((*p++ = *t++));
 583                 /* Create the secure record. */
 584                 p = buf;
 585                 COMPACT(pw->pw_name);
 586                 COMPACT(pw->pw_passwd);
 587                 memmove(p, &pw->pw_uid, sizeof(uid_t));
 588                 p += sizeof(uid_t);
 589                 memmove(p, &pw->pw_gid, sizeof(gid_t));
 590                 p += sizeof(gid_t);
 591                 memmove(p, &pw->pw_change, sizeof(time_t));
 592                 p += sizeof(time_t);
 593                 COMPACT(pw->pw_class);
 594                 COMPACT(pw->pw_gecos);
 595                 COMPACT(pw->pw_dir);
 596                 COMPACT(pw->pw_shell);
 597                 memmove(p, &pw->pw_expire, sizeof(time_t));
 598                 p += sizeof(time_t);
 599                 memmove(p, &flags, sizeof(int));
 600                 p += sizeof(int);
 601                 data.size = p - buf;
 602
 603                 /* Write the secure record. */
 604                 if ((edp->put)(edp, &key, &data, dbmode) == -1)
 605                         error("put");
 606
 607                 if (dp == NULL)
 608                         continue;
 609
 610                 /* Star out password to make insecure record. */
 611                 p = buf + strlen(pw->pw_name) + 1;      /* skip pw_name */
 612                 len = strlen(pw->pw_passwd);
 613                 memset(p, 0, len);                      /* zero pw_passwd */
 614                 t = p + len + 1;                        /* skip pw_passwd */
 615                 if (len != 0)
 616                         *p++ = '*';
 617                 *p++ = '\0';
 618                 memmove(p, t, data.size - (t - buf));
 619                 data.size -= len - 1;
 620
 621                 /* Write the insecure record. */
 622                 if ((dp->put)(dp, &key, &data, dbmode) == -1)
 623                         error("put");
 624         }
 625         if (firsttime) {
 626                 firsttime = 0;
 627                 if (username && !found && olduid != UID_MAX)
 628                         errorx("can't find user in master.passwd");
 629         }
 630 }