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[FreeBSD/FreeBSD.git] / usr.sbin / pwd_mkdb / pwd_mkdb.c
1 /*-
2  * Copyright (c) 1991, 1993, 1994
3  *      The Regents of the University of California.  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  * 4. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29
30 #if 0
31 #ifndef lint
32 static const char copyright[] =
33 "@(#) Copyright (c) 1991, 1993, 1994\n\
34         The Regents of the University of California.  All rights reserved.\n";
35 #endif /* not lint */
36
37 #ifndef lint
38 static char sccsid[] = "@(#)pwd_mkdb.c  8.5 (Berkeley) 4/20/94";
39 #endif /* not lint */
40 #endif
41
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
44
45 #include <sys/param.h>
46 #include <sys/endian.h>
47 #include <sys/stat.h>
48 #include <arpa/inet.h>
49
50 #include <db.h>
51 #include <err.h>
52 #include <errno.h>
53 #include <fcntl.h>
54 #include <libgen.h>
55 #include <limits.h>
56 #include <pwd.h>
57 #include <signal.h>
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <unistd.h>
62
63 #include "pw_scan.h"
64
65 #define INSECURE        1
66 #define SECURE          2
67 #define PERM_INSECURE   (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)
68 #define PERM_SECURE     (S_IRUSR|S_IWUSR)
69 #define LEGACY_VERSION(x)  _PW_VERSIONED(x, 3)
70 #define CURRENT_VERSION(x) _PW_VERSIONED(x, 4)
71
72 static HASHINFO openinfo = {
73         4096,           /* bsize */
74         32,             /* ffactor */
75         256,            /* nelem */
76         2048 * 1024,    /* cachesize */
77         NULL,           /* hash() */
78         BIG_ENDIAN      /* lorder */
79 };
80
81 static enum state { FILE_INSECURE, FILE_SECURE, FILE_ORIG } clean;
82 static struct passwd pwd;                       /* password structure */
83 static char *pname;                             /* password file name */
84 static char prefix[MAXPATHLEN];
85
86 static int is_comment;  /* flag for comments */
87 static char line[LINE_MAX];
88
89 void    cleanup(void);
90 void    error(const char *);
91 void    cp(char *, char *, mode_t mode);
92 void    mv(char *, char *);
93 int     scan(FILE *, struct passwd *);
94 static void     usage(void);
95
96 int
97 main(int argc, char *argv[])
98 {
99         static char verskey[] = _PWD_VERSION_KEY;
100         char version = _PWD_CURRENT_VERSION;
101         DB *dp, *sdp, *pw_db;
102         DBT data, sdata, key;
103         FILE *fp, *oldfp;
104         sigset_t set;
105         int ch, cnt, ypcnt, makeold, tfd, yp_enabled = 0;
106         unsigned int len;
107         uint32_t store;
108         const char *t;
109         char *p;
110         char buf[MAX(MAXPATHLEN, LINE_MAX * 2)], tbuf[1024];
111         char sbuf[MAX(MAXPATHLEN, LINE_MAX * 2)];
112         char buf2[MAXPATHLEN];
113         char sbuf2[MAXPATHLEN];
114         char *username;
115         u_int method, methoduid;
116         int Cflag, dflag, iflag, lflag;
117         int nblock = 0;
118
119         iflag = dflag = Cflag = lflag = 0;
120         strcpy(prefix, _PATH_PWD);
121         makeold = 0;
122         username = NULL;
123         oldfp = NULL;
124         while ((ch = getopt(argc, argv, "BCLlNd:ips:u:v")) != -1)
125                 switch(ch) {
126                 case 'B':                       /* big-endian output */
127                         openinfo.lorder = BIG_ENDIAN;
128                         break;
129                 case 'C':                       /* verify only */
130                         Cflag = 1;
131                         break;
132                 case 'l':                       /* generate legacy entries */
133                         lflag = 1;
134                         break;
135                 case 'L':                       /* little-endian output */
136                         openinfo.lorder = LITTLE_ENDIAN;
137                         break;
138                 case 'N':                       /* do not wait for lock */
139                         nblock = LOCK_NB;       /* will fail if locked */
140                         break;
141                 case 'd':
142                         dflag++;
143                         strlcpy(prefix, optarg, sizeof(prefix));
144                         break;
145                 case 'i':
146                         iflag++;
147                         break;
148                 case 'p':                       /* create V7 "file.orig" */
149                         makeold = 1;
150                         break;
151                 case 's':                       /* change default cachesize */
152                         openinfo.cachesize = atoi(optarg) * 1024 * 1024;
153                         break;
154                 case 'u':                       /* only update this record */
155                         username = optarg;
156                         break;
157                 case 'v':                       /* backward compatible */
158                         break;
159                 default:
160                         usage();
161                 }
162         argc -= optind;
163         argv += optind;
164
165         if (argc != 1 || (username && (*username == '+' || *username == '-')))
166                 usage();
167         if (lflag)
168                 warnx("legacy (v3) database format support is deprecated");
169
170         /*
171          * This could be changed to allow the user to interrupt.
172          * Probably not worth the effort.
173          */
174         sigemptyset(&set);
175         sigaddset(&set, SIGTSTP);
176         sigaddset(&set, SIGHUP);
177         sigaddset(&set, SIGINT);
178         sigaddset(&set, SIGQUIT);
179         sigaddset(&set, SIGTERM);
180         (void)sigprocmask(SIG_BLOCK, &set, (sigset_t *)NULL);
181
182         /* We don't care what the user wants. */
183         (void)umask(0);
184
185         pname = *argv;
186
187         /*
188          * Open and lock the original password file.  We have to check
189          * the hardlink count after we get the lock to handle any potential
190          * unlink/rename race.
191          *
192          * This lock is necessary when someone runs pwd_mkdb manually, directly
193          * on master.passwd, to handle the case where a user might try to
194          * change his password while pwd_mkdb is running. 
195          */
196         for (;;) {
197                 struct stat st;
198
199                 if (!(fp = fopen(pname, "r")))
200                         error(pname);
201                 if (flock(fileno(fp), LOCK_EX|nblock) < 0 && !(dflag && iflag))
202                         error("flock");
203                 if (fstat(fileno(fp), &st) < 0)
204                         error(pname);
205                 if (st.st_nlink != 0)
206                         break;
207                 fclose(fp);
208                 fp = NULL;
209         }
210
211         /* check only if password database is valid */
212         if (Cflag) {
213                 while (scan(fp, &pwd))
214                         if (!is_comment && strlen(pwd.pw_name) >= MAXLOGNAME) {
215                                 warnx("%s: username too long", pwd.pw_name);
216                                 exit(1);
217                         }
218                 exit(0);
219         }
220
221         /* Open the temporary insecure password database. */
222         (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
223         (void)snprintf(sbuf, sizeof(sbuf), "%s/%s.tmp", prefix, _SMP_DB);
224         if (username) {
225                 int use_version;
226
227                 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB);
228                 (void)snprintf(sbuf2, sizeof(sbuf2), "%s/%s", prefix, _SMP_DB);
229
230                 clean = FILE_INSECURE;
231                 cp(buf2, buf, PERM_INSECURE);
232                 dp = dbopen(buf,
233                     O_RDWR|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo);
234                 if (dp == NULL)
235                         error(buf);
236
237                 clean = FILE_SECURE;
238                 cp(sbuf2, sbuf, PERM_SECURE);
239                 sdp = dbopen(sbuf,
240                     O_RDWR|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
241                 if (sdp == NULL)
242                         error(sbuf);
243
244                 /*
245                  * Do some trouble to check if we should store this users 
246                  * uid. Don't use getpwnam/getpwuid as that interferes 
247                  * with NIS.
248                  */
249                 pw_db = dbopen(_PATH_MP_DB, O_RDONLY, 0, DB_HASH, NULL);
250                 if (!pw_db)
251                         error(_MP_DB);
252
253                 key.data = verskey;
254                 key.size = sizeof(verskey)-1;
255                 if ((pw_db->get)(pw_db, &key, &data, 0) == 0)
256                         use_version = *(unsigned char *)data.data;
257                 else
258                         use_version = 3;
259                 buf[0] = _PW_VERSIONED(_PW_KEYBYNAME, use_version);
260                 len = strlen(username);
261
262                 /* Only check that username fits in buffer */
263                 memmove(buf + 1, username, MIN(len, sizeof(buf) - 1));
264                 key.data = (u_char *)buf;
265                 key.size = len + 1;
266                 if ((pw_db->get)(pw_db, &key, &data, 0) == 0) {
267                         p = (char *)data.data;
268
269                         /* jump over pw_name and pw_passwd, to get to pw_uid */
270                         while (*p++)
271                                 ;
272                         while (*p++)
273                                 ;
274
275                         buf[0] = _PW_VERSIONED(_PW_KEYBYUID, use_version);
276                         memmove(buf + 1, p, sizeof(store));
277                         key.data = (u_char *)buf;
278                         key.size = sizeof(store) + 1;
279
280                         if ((pw_db->get)(pw_db, &key, &data, 0) == 0) {
281                                 /* First field of data.data holds pw_pwname */
282                                 if (!strcmp(data.data, username))
283                                         methoduid = 0;
284                                 else
285                                         methoduid = R_NOOVERWRITE;
286                         } else {
287                                 methoduid = R_NOOVERWRITE;
288                         }
289                 } else {
290                         methoduid = R_NOOVERWRITE;
291                 }
292                 if ((pw_db->close)(pw_db))
293                         error("close pw_db");
294                 method = 0;
295         } else {
296                 dp = dbopen(buf,
297                     O_RDWR|O_CREAT|O_EXCL, PERM_INSECURE, DB_HASH, &openinfo);
298                 if (dp == NULL)
299                         error(buf);
300                 clean = FILE_INSECURE;
301
302                 sdp = dbopen(sbuf,
303                     O_RDWR|O_CREAT|O_EXCL, PERM_SECURE, DB_HASH, &openinfo);
304                 if (sdp == NULL)
305                         error(sbuf);
306                 clean = FILE_SECURE;
307
308                 method = R_NOOVERWRITE;
309                 methoduid = R_NOOVERWRITE;
310         }
311
312         /*
313          * Open file for old password file.  Minor trickiness -- don't want to
314          * chance the file already existing, since someone (stupidly) might
315          * still be using this for permission checking.  So, open it first and
316          * fdopen the resulting fd.  The resulting file should be readable by
317          * everyone.
318          */
319         if (makeold) {
320                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
321                 if ((tfd = open(buf,
322                     O_WRONLY|O_CREAT|O_EXCL, PERM_INSECURE)) < 0)
323                         error(buf);
324                 if ((oldfp = fdopen(tfd, "w")) == NULL)
325                         error(buf);
326                 clean = FILE_ORIG;
327         }
328
329         /*
330          * The databases actually contain three copies of the original data.
331          * Each password file entry is converted into a rough approximation
332          * of a ``struct passwd'', with the strings placed inline.  This
333          * object is then stored as the data for three separate keys.  The
334          * first key * is the pw_name field prepended by the _PW_KEYBYNAME
335          * character.  The second key is the pw_uid field prepended by the
336          * _PW_KEYBYUID character.  The third key is the line number in the
337          * original file prepended by the _PW_KEYBYNUM character.  (The special
338          * characters are prepended to ensure that the keys do not collide.)
339          */
340         /* In order to transition this file into a machine-independent
341          * form, we have to change the format of entries.  However, since
342          * older binaries will still expect the old MD format entries, we 
343          * create those as usual and use versioned tags for the new entries.
344          */
345         if (username == NULL) {
346                 /* Do not add the VERSION tag when updating a single
347                  * user.  When operating on `old format' databases, this
348                  * would result in applications `seeing' only the updated
349                  * entries.
350                  */
351                 key.data = verskey;
352                 key.size = sizeof(verskey)-1;
353                 data.data = &version;
354                 data.size = 1;
355                 if ((dp->put)(dp, &key, &data, 0) == -1)
356                         error("put");
357                 if ((sdp->put)(sdp, &key, &data, 0) == -1)
358                         error("put");
359         }
360         ypcnt = 0;
361         data.data = (u_char *)buf;
362         sdata.data = (u_char *)sbuf;
363         key.data = (u_char *)tbuf;
364         for (cnt = 1; scan(fp, &pwd); ++cnt) {
365                 if (!is_comment && 
366                     (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-')) {
367                         yp_enabled = 1;
368                         ypcnt++;
369                 }
370                 if (is_comment)
371                         --cnt;
372 #define COMPACT(e)      t = e; while ((*p++ = *t++));
373 #define SCALAR(e)       store = htonl((uint32_t)(e));      \
374                         memmove(p, &store, sizeof(store)); \
375                         p += sizeof(store);
376 #define LSCALAR(e)      store = HTOL((uint32_t)(e));       \
377                         memmove(p, &store, sizeof(store)); \
378                         p += sizeof(store);
379 #define HTOL(e)         (openinfo.lorder == BYTE_ORDER ? \
380                         (uint32_t)(e) : \
381                         bswap32((uint32_t)(e)))
382                 if (!is_comment && 
383                     (!username || (strcmp(username, pwd.pw_name) == 0))) {
384                         /* Create insecure data. */
385                         p = buf;
386                         COMPACT(pwd.pw_name);
387                         COMPACT("*");
388                         SCALAR(pwd.pw_uid);
389                         SCALAR(pwd.pw_gid);
390                         SCALAR(pwd.pw_change);
391                         COMPACT(pwd.pw_class);
392                         COMPACT(pwd.pw_gecos);
393                         COMPACT(pwd.pw_dir);
394                         COMPACT(pwd.pw_shell);
395                         SCALAR(pwd.pw_expire);
396                         SCALAR(pwd.pw_fields);
397                         data.size = p - buf;
398
399                         /* Create secure data. */
400                         p = sbuf;
401                         COMPACT(pwd.pw_name);
402                         COMPACT(pwd.pw_passwd);
403                         SCALAR(pwd.pw_uid);
404                         SCALAR(pwd.pw_gid);
405                         SCALAR(pwd.pw_change);
406                         COMPACT(pwd.pw_class);
407                         COMPACT(pwd.pw_gecos);
408                         COMPACT(pwd.pw_dir);
409                         COMPACT(pwd.pw_shell);
410                         SCALAR(pwd.pw_expire);
411                         SCALAR(pwd.pw_fields);
412                         sdata.size = p - sbuf;
413
414                         /* Store insecure by name. */
415                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME);
416                         len = strlen(pwd.pw_name);
417                         memmove(tbuf + 1, pwd.pw_name, len);
418                         key.size = len + 1;
419                         if ((dp->put)(dp, &key, &data, method) == -1)
420                                 error("put");
421
422                         /* Store insecure by number. */
423                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM);
424                         store = htonl(cnt);
425                         memmove(tbuf + 1, &store, sizeof(store));
426                         key.size = sizeof(store) + 1;
427                         if ((dp->put)(dp, &key, &data, method) == -1)
428                                 error("put");
429
430                         /* Store insecure by uid. */
431                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID);
432                         store = htonl(pwd.pw_uid);
433                         memmove(tbuf + 1, &store, sizeof(store));
434                         key.size = sizeof(store) + 1;
435                         if ((dp->put)(dp, &key, &data, methoduid) == -1)
436                                 error("put");
437
438                         /* Store secure by name. */
439                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYNAME);
440                         len = strlen(pwd.pw_name);
441                         memmove(tbuf + 1, pwd.pw_name, len);
442                         key.size = len + 1;
443                         if ((sdp->put)(sdp, &key, &sdata, method) == -1)
444                                 error("put");
445
446                         /* Store secure by number. */
447                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYNUM);
448                         store = htonl(cnt);
449                         memmove(tbuf + 1, &store, sizeof(store));
450                         key.size = sizeof(store) + 1;
451                         if ((sdp->put)(sdp, &key, &sdata, method) == -1)
452                                 error("put");
453
454                         /* Store secure by uid. */
455                         tbuf[0] = CURRENT_VERSION(_PW_KEYBYUID);
456                         store = htonl(pwd.pw_uid);
457                         memmove(tbuf + 1, &store, sizeof(store));
458                         key.size = sizeof(store) + 1;
459                         if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1)
460                                 error("put");
461
462                         /* Store insecure and secure special plus and special minus */
463                         if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') {
464                                 tbuf[0] = CURRENT_VERSION(_PW_KEYYPBYNUM);
465                                 store = htonl(ypcnt);
466                                 memmove(tbuf + 1, &store, sizeof(store));
467                                 key.size = sizeof(store) + 1;
468                                 if ((dp->put)(dp, &key, &data, method) == -1)
469                                         error("put");
470                                 if ((sdp->put)(sdp, &key, &sdata, method) == -1)
471                                         error("put");
472                         }
473
474                         if (lflag) {
475                                 /* Create insecure data. (legacy version) */
476                                 p = buf;
477                                 COMPACT(pwd.pw_name);
478                                 COMPACT("*");
479                                 LSCALAR(pwd.pw_uid);
480                                 LSCALAR(pwd.pw_gid);
481                                 LSCALAR(pwd.pw_change);
482                                 COMPACT(pwd.pw_class);
483                                 COMPACT(pwd.pw_gecos);
484                                 COMPACT(pwd.pw_dir);
485                                 COMPACT(pwd.pw_shell);
486                                 LSCALAR(pwd.pw_expire);
487                                 LSCALAR(pwd.pw_fields);
488                                 data.size = p - buf;
489
490                                 /* Create secure data. (legacy version) */
491                                 p = sbuf;
492                                 COMPACT(pwd.pw_name);
493                                 COMPACT(pwd.pw_passwd);
494                                 LSCALAR(pwd.pw_uid);
495                                 LSCALAR(pwd.pw_gid);
496                                 LSCALAR(pwd.pw_change);
497                                 COMPACT(pwd.pw_class);
498                                 COMPACT(pwd.pw_gecos);
499                                 COMPACT(pwd.pw_dir);
500                                 COMPACT(pwd.pw_shell);
501                                 LSCALAR(pwd.pw_expire);
502                                 LSCALAR(pwd.pw_fields);
503                                 sdata.size = p - sbuf;
504
505                                 /* Store insecure by name. */
506                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME);
507                                 len = strlen(pwd.pw_name);
508                                 memmove(tbuf + 1, pwd.pw_name, len);
509                                 key.size = len + 1;
510                                 if ((dp->put)(dp, &key, &data, method) == -1)
511                                         error("put");
512
513                                 /* Store insecure by number. */
514                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM);
515                                 store = HTOL(cnt);
516                                 memmove(tbuf + 1, &store, sizeof(store));
517                                 key.size = sizeof(store) + 1;
518                                 if ((dp->put)(dp, &key, &data, method) == -1)
519                                         error("put");
520
521                                 /* Store insecure by uid. */
522                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID);
523                                 store = HTOL(pwd.pw_uid);
524                                 memmove(tbuf + 1, &store, sizeof(store));
525                                 key.size = sizeof(store) + 1;
526                                 if ((dp->put)(dp, &key, &data, methoduid) == -1)
527                                         error("put");
528
529                                 /* Store secure by name. */
530                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNAME);
531                                 len = strlen(pwd.pw_name);
532                                 memmove(tbuf + 1, pwd.pw_name, len);
533                                 key.size = len + 1;
534                                 if ((sdp->put)(sdp, &key, &sdata, method) == -1)
535                                         error("put");
536
537                                 /* Store secure by number. */
538                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYNUM);
539                                 store = HTOL(cnt);
540                                 memmove(tbuf + 1, &store, sizeof(store));
541                                 key.size = sizeof(store) + 1;
542                                 if ((sdp->put)(sdp, &key, &sdata, method) == -1)
543                                         error("put");
544
545                                 /* Store secure by uid. */
546                                 tbuf[0] = LEGACY_VERSION(_PW_KEYBYUID);
547                                 store = HTOL(pwd.pw_uid);
548                                 memmove(tbuf + 1, &store, sizeof(store));
549                                 key.size = sizeof(store) + 1;
550                                 if ((sdp->put)(sdp, &key, &sdata, methoduid) == -1)
551                                         error("put");
552
553                                 /* Store insecure and secure special plus and special minus */
554                                 if (pwd.pw_name[0] == '+' || pwd.pw_name[0] == '-') {
555                                         tbuf[0] = LEGACY_VERSION(_PW_KEYYPBYNUM);
556                                         store = HTOL(ypcnt);
557                                         memmove(tbuf + 1, &store, sizeof(store));
558                                         key.size = sizeof(store) + 1;
559                                         if ((dp->put)(dp, &key, &data, method) == -1)
560                                                 error("put");
561                                         if ((sdp->put)(sdp, &key, &sdata, method) == -1)
562                                                 error("put");
563                                 }
564                         }
565                 }
566                 /* Create original format password file entry */
567                 if (is_comment && makeold){     /* copy comments */
568                         if (fprintf(oldfp, "%s\n", line) < 0)
569                                 error("write old");
570                 } else if (makeold) {
571                         char uidstr[20];
572                         char gidstr[20];
573
574                         snprintf(uidstr, sizeof(uidstr), "%u", pwd.pw_uid);
575                         snprintf(gidstr, sizeof(gidstr), "%u", pwd.pw_gid);
576
577                         if (fprintf(oldfp, "%s:*:%s:%s:%s:%s:%s\n",
578                             pwd.pw_name, pwd.pw_fields & _PWF_UID ? uidstr : "",
579                             pwd.pw_fields & _PWF_GID ? gidstr : "",
580                             pwd.pw_gecos, pwd.pw_dir, pwd.pw_shell) < 0)
581                                 error("write old");
582                 }
583         }
584         /* If YP enabled, set flag. */
585         if (yp_enabled) {
586                 buf[0] = yp_enabled + 2;
587                 data.size = 1;
588                 key.size = 1;
589                 tbuf[0] = CURRENT_VERSION(_PW_KEYYPENABLED);
590                 if ((dp->put)(dp, &key, &data, method) == -1)
591                         error("put");
592                 if ((sdp->put)(sdp, &key, &data, method) == -1)
593                         error("put");
594                 if (lflag) {
595                         tbuf[0] = LEGACY_VERSION(_PW_KEYYPENABLED);
596                         key.size = 1;
597                         if ((dp->put)(dp, &key, &data, method) == -1)
598                                 error("put");
599                         if ((sdp->put)(sdp, &key, &data, method) == -1)
600                                 error("put");
601                 }
602         }
603
604         if ((dp->close)(dp) == -1)
605                 error("close");
606         if ((sdp->close)(sdp) == -1)
607                 error("close");
608         if (makeold) {
609                 (void)fflush(oldfp);
610                 if (fclose(oldfp) == EOF)
611                         error("close old");
612         }
613
614         /* Set master.passwd permissions, in case caller forgot. */
615         (void)fchmod(fileno(fp), S_IRUSR|S_IWUSR);
616
617         /* Install as the real password files. */
618         (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
619         (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _MP_DB);
620         mv(buf, buf2);
621         (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB);
622         (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _SMP_DB);
623         mv(buf, buf2);
624         if (makeold) {
625                 (void)snprintf(buf2, sizeof(buf2), "%s/%s", prefix, _PASSWD);
626                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
627                 mv(buf, buf2);
628         }
629         /*
630          * Move the master password LAST -- chpass(1), passwd(1) and vipw(8)
631          * all use flock(2) on it to block other incarnations of themselves.
632          * The rename means that everything is unlocked, as the original file
633          * can no longer be accessed.
634          */
635         (void)snprintf(buf, sizeof(buf), "%s/%s", prefix, _MASTERPASSWD);
636         mv(pname, buf);
637
638         /*
639          * Close locked password file after rename()
640          */
641         if (fclose(fp) == EOF)
642                 error("close fp");
643
644         exit(0);
645 }
646
647 int
648 scan(FILE *fp, struct passwd *pw)
649 {
650         static int lcnt;
651         size_t len;
652         char *p;
653
654         p = fgetln(fp, &len);
655         if (p == NULL)
656                 return (0);
657         ++lcnt;
658         /*
659          * ``... if I swallow anything evil, put your fingers down my
660          * throat...''
661          *      -- The Who
662          */
663         if (len > 0 && p[len - 1] == '\n')
664                 len--;
665         if (len >= sizeof(line) - 1) {
666                 warnx("line #%d too long", lcnt);
667                 goto fmt;
668         }
669         memcpy(line, p, len);
670         line[len] = '\0';
671
672         /* 
673          * Ignore comments: ^[ \t]*#
674          */
675         for (p = line; *p != '\0'; p++)
676                 if (*p != ' ' && *p != '\t')
677                         break;
678         if (*p == '#' || *p == '\0') {
679                 is_comment = 1;
680                 return(1);
681         } else
682                 is_comment = 0;
683
684         if (!__pw_scan(line, pw, _PWSCAN_WARN|_PWSCAN_MASTER)) {
685                 warnx("at line #%d", lcnt);
686 fmt:            errno = EFTYPE; /* XXX */
687                 error(pname);
688         }
689
690         return (1);
691 }
692
693 void                    
694 cp(char *from, char *to, mode_t mode)              
695 {               
696         static char buf[MAXBSIZE];
697         int from_fd, rcount, to_fd, wcount;
698
699         if ((from_fd = open(from, O_RDONLY, 0)) < 0)
700                 error(from);
701         if ((to_fd = open(to, O_WRONLY|O_CREAT|O_EXCL, mode)) < 0)
702                 error(to);
703         while ((rcount = read(from_fd, buf, MAXBSIZE)) > 0) {
704                 wcount = write(to_fd, buf, rcount);
705                 if (rcount != wcount || wcount == -1) {
706                         int sverrno = errno;
707
708                         (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
709                         errno = sverrno;
710                         error(buf);
711                 }
712         }
713         if (rcount < 0) {
714                 int sverrno = errno;
715
716                 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
717                 errno = sverrno;
718                 error(buf);
719         }
720 }
721
722
723 void
724 mv(char *from, char *to)
725 {
726         char buf[MAXPATHLEN];
727         char *to_dir;
728         int to_dir_fd = -1;
729
730         /*
731          * Make sure file is safe on disk. To improve performance we will call
732          * fsync() to the directory where file lies
733          */
734         if (rename(from, to) != 0 ||
735             (to_dir = dirname(to)) == NULL ||
736             (to_dir_fd = open(to_dir, O_RDONLY|O_DIRECTORY)) == -1 ||
737             fsync(to_dir_fd) != 0) {
738                 int sverrno = errno;
739                 (void)snprintf(buf, sizeof(buf), "%s to %s", from, to);
740                 errno = sverrno;
741                 if (to_dir_fd != -1)
742                         close(to_dir_fd);
743                 error(buf);
744         }
745
746         if (to_dir_fd != -1)
747                 close(to_dir_fd);
748 }
749
750 void
751 error(const char *name)
752 {
753
754         warn("%s", name);
755         cleanup();
756         exit(1);
757 }
758
759 void
760 cleanup(void)
761 {
762         char buf[MAXPATHLEN];
763
764         switch(clean) {
765         case FILE_ORIG:
766                 (void)snprintf(buf, sizeof(buf), "%s.orig", pname);
767                 (void)unlink(buf);
768                 /* FALLTHROUGH */
769         case FILE_SECURE:
770                 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _SMP_DB);
771                 (void)unlink(buf);
772                 /* FALLTHROUGH */
773         case FILE_INSECURE:
774                 (void)snprintf(buf, sizeof(buf), "%s/%s.tmp", prefix, _MP_DB);
775                 (void)unlink(buf);
776         }
777 }
778
779 static void
780 usage(void)
781 {
782
783         (void)fprintf(stderr,
784 "usage: pwd_mkdb [-BCiLNp] [-d directory] [-s cachesize] [-u username] file\n");
785         exit(1);
786 }