xref: /freebsd/sbin/quotacheck/quotacheck.c (revision 37e18df37da46cf9e08bc22bf8112fa270d7d8ce)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1980, 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Robert Elz at The University of Melbourne.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #if 0
36 #ifndef lint
37 static const char copyright[] =
38 "@(#) Copyright (c) 1980, 1990, 1993\n\
39 	The Regents of the University of California.  All rights reserved.\n";
40 #endif /* not lint */
41 
42 #ifndef lint
43 static char sccsid[] = "@(#)quotacheck.c	8.3 (Berkeley) 1/29/94";
44 #endif /* not lint */
45 #endif
46 #include <sys/cdefs.h>
47 __FBSDID("$FreeBSD$");
48 
49 /*
50  * Fix up / report on disk quotas & usage
51  */
52 #include <sys/param.h>
53 #include <sys/disklabel.h>
54 #include <sys/mount.h>
55 #include <sys/stat.h>
56 
57 #include <ufs/ufs/dinode.h>
58 #include <ufs/ufs/quota.h>
59 #include <ufs/ffs/fs.h>
60 
61 #include <err.h>
62 #include <errno.h>
63 #include <fcntl.h>
64 #include <fstab.h>
65 #include <grp.h>
66 #include <libufs.h>
67 #include <libutil.h>
68 #include <pwd.h>
69 #include <stdint.h>
70 #include <stdio.h>
71 #include <stdlib.h>
72 #include <string.h>
73 #include <unistd.h>
74 
75 #include "quotacheck.h"
76 
77 const char *qfname = QUOTAFILENAME;
78 const char *qfextension[] = INITQFNAMES;
79 const char *quotagroup = QUOTAGROUP;
80 
81 union {
82 	struct	fs	sblk;
83 	char	dummy[MAXBSIZE];
84 } sb_un;
85 #define	sblock	sb_un.sblk
86 union {
87 	struct	cg	cgblk;
88 	char	dummy[MAXBSIZE];
89 } cg_un;
90 #define	cgblk	cg_un.cgblk
91 long dev_bsize = 1;
92 ino_t maxino;
93 
94 union dinode {
95 	struct ufs1_dinode dp1;
96 	struct ufs2_dinode dp2;
97 };
98 #define	DIP(dp, field) \
99 	((sblock.fs_magic == FS_UFS1_MAGIC) ? \
100 	(dp)->dp1.field : (dp)->dp2.field)
101 
102 #define	HASUSR	1
103 #define	HASGRP	2
104 
105 struct fileusage {
106 	struct	fileusage *fu_next;
107 	u_long	fu_curinodes;
108 	u_long	fu_curblocks;
109 	u_long	fu_id;
110 	char	fu_name[1];
111 	/* actually bigger */
112 };
113 #define FUHASH 1024	/* must be power of two */
114 struct fileusage *fuhead[MAXQUOTAS][FUHASH];
115 
116 int	aflag;			/* all file systems */
117 int	cflag;			/* convert format to 32 or 64 bit size */
118 int	gflag;			/* check group quotas */
119 int	uflag;			/* check user quotas */
120 int	vflag;			/* verbose */
121 int	fi;			/* open disk file descriptor */
122 
123 struct fileusage *
124 	 addid(u_long, int, char *, const char *);
125 void	 blkread(ufs2_daddr_t, char *, long);
126 void	 freeinodebuf(void);
127 union dinode *
128 	 getnextinode(ino_t);
129 int	 getquotagid(void);
130 struct fileusage *
131 	 lookup(u_long, int);
132 int	 oneof(char *, char*[], int);
133 void	 printchanges(const char *, int, struct dqblk *, struct fileusage *,
134 	    u_long);
135 void	 setinodebuf(ino_t);
136 int	 update(const char *, struct quotafile *, int);
137 void	 usage(void);
138 
139 int
140 main(int argc, char *argv[])
141 {
142 	struct fstab *fs;
143 	struct passwd *pw;
144 	struct group *gr;
145 	struct quotafile *qfu, *qfg;
146 	int i, argnum, maxrun, errs, ch;
147 	long done = 0;
148 	char *name;
149 
150 	errs = maxrun = 0;
151 	while ((ch = getopt(argc, argv, "ac:guvl:")) != -1) {
152 		switch(ch) {
153 		case 'a':
154 			aflag++;
155 			break;
156 		case 'c':
157 			if (cflag)
158 				usage();
159 			cflag = atoi(optarg);
160 			break;
161 		case 'g':
162 			gflag++;
163 			break;
164 		case 'u':
165 			uflag++;
166 			break;
167 		case 'v':
168 			vflag++;
169 			break;
170 		case 'l':
171 			maxrun = atoi(optarg);
172 			break;
173 		default:
174 			usage();
175 		}
176 	}
177 	argc -= optind;
178 	argv += optind;
179 	if ((argc == 0 && !aflag) || (argc > 0 && aflag))
180 		usage();
181 	if (cflag && cflag != 32 && cflag != 64)
182 		usage();
183 	if (!gflag && !uflag) {
184 		gflag++;
185 		uflag++;
186 	}
187 	if (gflag) {
188 		setgrent();
189 		while ((gr = getgrent()) != NULL)
190 			(void) addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name,
191 			    NULL);
192 		endgrent();
193 	}
194 	if (uflag) {
195 		setpwent();
196 		while ((pw = getpwent()) != NULL)
197 			(void) addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name,
198 			    NULL);
199 		endpwent();
200 	}
201 	/*
202 	 * The maxrun (-l) option is now deprecated.
203 	 */
204 	if (maxrun > 0)
205 		warnx("the -l option is now deprecated");
206 	if (aflag)
207 		exit(checkfstab(uflag, gflag));
208 	if (setfsent() == 0)
209 		errx(1, "%s: can't open", FSTAB);
210 	while ((fs = getfsent()) != NULL) {
211 		if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
212 		     (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) &&
213 		    (name = blockcheck(fs->fs_spec))) {
214 			done |= 1 << argnum;
215 			qfu = NULL;
216 			if (uflag)
217 				qfu = quota_open(fs, USRQUOTA, O_CREAT|O_RDWR);
218 			qfg = NULL;
219 			if (gflag)
220 				qfg = quota_open(fs, GRPQUOTA, O_CREAT|O_RDWR);
221 			if (qfu == NULL && qfg == NULL)
222 				continue;
223 			errs += chkquota(name, qfu, qfg);
224 			if (qfu)
225 				quota_close(qfu);
226 			if (qfg)
227 				quota_close(qfg);
228 		}
229 	}
230 	endfsent();
231 	for (i = 0; i < argc; i++)
232 		if ((done & (1 << i)) == 0)
233 			fprintf(stderr, "%s not found in %s\n",
234 				argv[i], FSTAB);
235 	exit(errs);
236 }
237 
238 void
239 usage(void)
240 {
241 	(void)fprintf(stderr, "%s\n%s\n",
242 		"usage: quotacheck [-guv] [-c 32 | 64] [-l maxrun] -a",
243 		"       quotacheck [-guv] [-c 32 | 64] filesystem ...");
244 	exit(1);
245 }
246 
247 /*
248  * Scan the specified file system to check quota(s) present on it.
249  */
250 int
251 chkquota(char *specname, struct quotafile *qfu, struct quotafile *qfg)
252 {
253 	struct fileusage *fup;
254 	union dinode *dp;
255 	struct fs *fs;
256 	int i, ret, mode, errs = 0;
257 	u_int32_t cg;
258 	ino_t curino, ino, inosused, userino = 0, groupino = 0;
259 	dev_t dev, userdev = 0, groupdev = 0;
260 	struct stat sb;
261 	const char *mntpt;
262 	char *cp;
263 
264 	if (qfu != NULL)
265 		mntpt = quota_fsname(qfu);
266 	else if (qfg != NULL)
267 		mntpt = quota_fsname(qfg);
268 	else
269 		errx(1, "null quotafile information passed to chkquota()\n");
270 	if (cflag) {
271 		if (vflag && qfu != NULL)
272 			printf("%s: convert user quota to %d bits\n",
273 			    mntpt, cflag);
274 		if (qfu != NULL && quota_convert(qfu, cflag) < 0) {
275 			if (errno == EBADF)
276 				errx(1,
277 				    "%s: cannot convert an active quota file",
278 				    mntpt);
279 			err(1, "user quota conversion to size %d failed",
280 			    cflag);
281 		}
282 		if (vflag && qfg != NULL)
283 			printf("%s: convert group quota to %d bits\n",
284 			    mntpt, cflag);
285 		if (qfg != NULL && quota_convert(qfg, cflag) < 0) {
286 			if (errno == EBADF)
287 				errx(1,
288 				    "%s: cannot convert an active quota file",
289 				    mntpt);
290 			err(1, "group quota conversion to size %d failed",
291 			    cflag);
292 		}
293 	}
294 	if ((fi = open(specname, O_RDONLY, 0)) < 0) {
295 		warn("%s", specname);
296 		return (1);
297 	}
298 	if ((stat(mntpt, &sb)) < 0) {
299 		warn("%s", mntpt);
300 		return (1);
301 	}
302 	dev = sb.st_dev;
303 	if (vflag) {
304 		(void)printf("*** Checking ");
305 		if (qfu)
306 			(void)printf("user%s", qfg ? " and " : "");
307 		if (qfg)
308 			(void)printf("group");
309 		(void)printf(" quotas for %s (%s)\n", specname, mntpt);
310 	}
311 	if (qfu) {
312 		if (stat(quota_qfname(qfu), &sb) == 0) {
313 			userino = sb.st_ino;
314 			userdev = sb.st_dev;
315 		}
316 	}
317 	if (qfg) {
318 		if (stat(quota_qfname(qfg), &sb) == 0) {
319 			groupino = sb.st_ino;
320 			groupdev = sb.st_dev;
321 		}
322 	}
323 	sync();
324 	if ((ret = sbget(fi, &fs, -1)) != 0) {
325 		switch (ret) {
326 		case ENOENT:
327 			warn("Cannot find file system superblock");
328 			return (1);
329 		default:
330 			warn("Unable to read file system superblock");
331 			return (1);
332 		}
333 	}
334 	bcopy(fs, &sblock, fs->fs_sbsize);
335 	free(fs);
336 	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
337 	maxino = sblock.fs_ncg * sblock.fs_ipg;
338 	for (cg = 0; cg < sblock.fs_ncg; cg++) {
339 		ino = cg * sblock.fs_ipg;
340 		setinodebuf(ino);
341 		blkread(fsbtodb(&sblock, cgtod(&sblock, cg)), (char *)(&cgblk),
342 		    sblock.fs_cgsize);
343 		if (sblock.fs_magic == FS_UFS2_MAGIC)
344 			inosused = cgblk.cg_initediblk;
345 		else
346 			inosused = sblock.fs_ipg;
347 		/*
348 		 * If we are using soft updates, then we can trust the
349 		 * cylinder group inode allocation maps to tell us which
350 		 * inodes are allocated. We will scan the used inode map
351 		 * to find the inodes that are really in use, and then
352 		 * read only those inodes in from disk.
353 		 */
354 		if (sblock.fs_flags & FS_DOSOFTDEP) {
355 			if (!cg_chkmagic(&cgblk))
356 				errx(1, "CG %d: BAD MAGIC NUMBER\n", cg);
357 			cp = &cg_inosused(&cgblk)[(inosused - 1) / CHAR_BIT];
358 			for ( ; inosused > 0; inosused -= CHAR_BIT, cp--) {
359 				if (*cp == 0)
360 					continue;
361 				for (i = 1 << (CHAR_BIT - 1); i > 0; i >>= 1) {
362 					if (*cp & i)
363 						break;
364 					inosused--;
365 				}
366 				break;
367 			}
368 			if (inosused <= 0)
369 				continue;
370 		}
371 		for (curino = 0; curino < inosused; curino++, ino++) {
372 			if ((dp = getnextinode(ino)) == NULL ||
373 			    ino < UFS_ROOTINO ||
374 			    (mode = DIP(dp, di_mode) & IFMT) == 0)
375 				continue;
376 			/*
377 			 * XXX: Do not account for UIDs or GIDs that appear
378 			 * to be negative to prevent generating 100GB+
379 			 * quota files.
380 			 */
381 			if ((int)DIP(dp, di_uid) < 0 ||
382 			    (int)DIP(dp, di_gid) < 0) {
383 				if (vflag) {
384 					if (aflag)
385 						(void)printf("%s: ", mntpt);
386 			(void)printf("out of range UID/GID (%u/%u) ino=%ju\n",
387 					    DIP(dp, di_uid), DIP(dp,di_gid),
388 					    (uintmax_t)ino);
389 				}
390 				continue;
391 			}
392 
393 			/*
394 			 * Do not account for file system snapshot files
395 			 * or the actual quota data files to be consistent
396 			 * with how they are handled inside the kernel.
397 			 */
398 #ifdef	SF_SNAPSHOT
399 			if (DIP(dp, di_flags) & SF_SNAPSHOT)
400 				continue;
401 #endif
402 			if ((ino == userino && dev == userdev) ||
403 			    (ino == groupino && dev == groupdev))
404 				continue;
405 			if (qfg) {
406 				fup = addid((u_long)DIP(dp, di_gid), GRPQUOTA,
407 				    NULL, mntpt);
408 				fup->fu_curinodes++;
409 				if (mode == IFREG || mode == IFDIR ||
410 				    mode == IFLNK)
411 					fup->fu_curblocks += DIP(dp, di_blocks);
412 			}
413 			if (qfu) {
414 				fup = addid((u_long)DIP(dp, di_uid), USRQUOTA,
415 				    NULL, mntpt);
416 				fup->fu_curinodes++;
417 				if (mode == IFREG || mode == IFDIR ||
418 				    mode == IFLNK)
419 					fup->fu_curblocks += DIP(dp, di_blocks);
420 			}
421 		}
422 	}
423 	freeinodebuf();
424 	if (qfu)
425 		errs += update(mntpt, qfu, USRQUOTA);
426 	if (qfg)
427 		errs += update(mntpt, qfg, GRPQUOTA);
428 	close(fi);
429 	(void)fflush(stdout);
430 	return (errs);
431 }
432 
433 /*
434  * Update a specified quota file.
435  */
436 int
437 update(const char *fsname, struct quotafile *qf, int type)
438 {
439 	struct fileusage *fup;
440 	u_long id, lastid, highid = 0;
441 	struct dqblk dqbuf;
442 	struct stat sb;
443 	static struct dqblk zerodqbuf;
444 	static struct fileusage zerofileusage;
445 
446 	/*
447 	 * Scan the on-disk quota file and record any usage changes.
448 	 */
449 	lastid = quota_maxid(qf);
450 	for (id = 0; id <= lastid; id++) {
451 		if (quota_read(qf, &dqbuf, id) < 0)
452 			dqbuf = zerodqbuf;
453 		if ((fup = lookup(id, type)) == NULL)
454 			fup = &zerofileusage;
455 		if (fup->fu_curinodes || fup->fu_curblocks ||
456 		    dqbuf.dqb_bsoftlimit || dqbuf.dqb_bhardlimit ||
457 		    dqbuf.dqb_isoftlimit || dqbuf.dqb_ihardlimit)
458 			highid = id;
459 		if (dqbuf.dqb_curinodes == fup->fu_curinodes &&
460 		    dqbuf.dqb_curblocks == fup->fu_curblocks) {
461 			fup->fu_curinodes = 0;
462 			fup->fu_curblocks = 0;
463 			continue;
464 		}
465 		printchanges(fsname, type, &dqbuf, fup, id);
466 		dqbuf.dqb_curinodes = fup->fu_curinodes;
467 		dqbuf.dqb_curblocks = fup->fu_curblocks;
468 		(void) quota_write_usage(qf, &dqbuf, id);
469 		fup->fu_curinodes = 0;
470 		fup->fu_curblocks = 0;
471 	}
472 
473 	/*
474 	 * Walk the hash table looking for ids with non-zero usage
475 	 * that are not currently recorded in the quota file. E.g.
476 	 * ids that are past the end of the current file.
477 	 */
478 	for (id = 0; id < FUHASH; id++) {
479 		for (fup = fuhead[type][id]; fup != NULL; fup = fup->fu_next) {
480 			if (fup->fu_id <= lastid)
481 				continue;
482 			if (fup->fu_curinodes == 0 && fup->fu_curblocks == 0)
483 				continue;
484 			bzero(&dqbuf, sizeof(struct dqblk));
485 			if (fup->fu_id > highid)
486 				highid = fup->fu_id;
487 			printchanges(fsname, type, &dqbuf, fup, fup->fu_id);
488 			dqbuf.dqb_curinodes = fup->fu_curinodes;
489 			dqbuf.dqb_curblocks = fup->fu_curblocks;
490 			(void) quota_write_usage(qf, &dqbuf, fup->fu_id);
491 			fup->fu_curinodes = 0;
492 			fup->fu_curblocks = 0;
493 		}
494 	}
495 	/*
496 	 * If this is old format file, then size may be smaller,
497 	 * so ensure that we only truncate when it will make things
498 	 * smaller, and not if it will grow an old format file.
499 	 */
500 	if (highid < lastid &&
501 	    stat(quota_qfname(qf), &sb) == 0 &&
502 	    sb.st_size > (off_t)((highid + 2) * sizeof(struct dqblk)))
503 		truncate(quota_qfname(qf),
504 		    (((off_t)highid + 2) * sizeof(struct dqblk)));
505 	return (0);
506 }
507 
508 /*
509  * Check to see if target appears in list of size cnt.
510  */
511 int
512 oneof(char *target, char *list[], int cnt)
513 {
514 	int i;
515 
516 	for (i = 0; i < cnt; i++)
517 		if (strcmp(target, list[i]) == 0)
518 			return (i);
519 	return (-1);
520 }
521 
522 /*
523  * Determine the group identifier for quota files.
524  */
525 int
526 getquotagid(void)
527 {
528 	struct group *gr;
529 
530 	if ((gr = getgrnam(quotagroup)) != NULL)
531 		return (gr->gr_gid);
532 	return (-1);
533 }
534 
535 /*
536  * Routines to manage the file usage table.
537  *
538  * Lookup an id of a specific type.
539  */
540 struct fileusage *
541 lookup(u_long id, int type)
542 {
543 	struct fileusage *fup;
544 
545 	for (fup = fuhead[type][id & (FUHASH-1)]; fup != NULL; fup = fup->fu_next)
546 		if (fup->fu_id == id)
547 			return (fup);
548 	return (NULL);
549 }
550 
551 /*
552  * Add a new file usage id if it does not already exist.
553  */
554 struct fileusage *
555 addid(u_long id, int type, char *name, const char *fsname)
556 {
557 	struct fileusage *fup, **fhp;
558 	int len;
559 
560 	if ((fup = lookup(id, type)) != NULL)
561 		return (fup);
562 	if (name)
563 		len = strlen(name);
564 	else
565 		len = 0;
566 	if ((fup = calloc(1, sizeof(*fup) + len)) == NULL)
567 		errx(1, "calloc failed");
568 	fhp = &fuhead[type][id & (FUHASH - 1)];
569 	fup->fu_next = *fhp;
570 	*fhp = fup;
571 	fup->fu_id = id;
572 	if (name)
573 		bcopy(name, fup->fu_name, len + 1);
574 	else {
575 		(void)sprintf(fup->fu_name, "%lu", id);
576 		if (vflag) {
577 			if (aflag && fsname != NULL)
578 				(void)printf("%s: ", fsname);
579 			printf("unknown %cid: %lu\n",
580 			    type == USRQUOTA ? 'u' : 'g', id);
581 		}
582 	}
583 	return (fup);
584 }
585 
586 /*
587  * Special purpose version of ginode used to optimize pass
588  * over all the inodes in numerical order.
589  */
590 static ino_t nextino, lastinum, lastvalidinum;
591 static long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
592 static caddr_t inodebuf;
593 #define INOBUFSIZE	56*1024		/* size of buffer to read inodes */
594 
595 union dinode *
596 getnextinode(ino_t inumber)
597 {
598 	long size;
599 	ufs2_daddr_t dblk;
600 	union dinode *dp;
601 	static caddr_t nextinop;
602 
603 	if (inumber != nextino++ || inumber > lastvalidinum)
604 		errx(1, "bad inode number %ju to nextinode",
605 		    (uintmax_t)inumber);
606 	if (inumber >= lastinum) {
607 		readcnt++;
608 		dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
609 		if (readcnt % readpercg == 0) {
610 			size = partialsize;
611 			lastinum += partialcnt;
612 		} else {
613 			size = inobufsize;
614 			lastinum += fullcnt;
615 		}
616 		/*
617 		 * If blkread returns an error, it will already have zeroed
618 		 * out the buffer, so we do not need to do so here.
619 		 */
620 		blkread(dblk, inodebuf, size);
621 		nextinop = inodebuf;
622 	}
623 	dp = (union dinode *)nextinop;
624 	if (sblock.fs_magic == FS_UFS1_MAGIC)
625 		nextinop += sizeof(struct ufs1_dinode);
626 	else
627 		nextinop += sizeof(struct ufs2_dinode);
628 	return (dp);
629 }
630 
631 /*
632  * Prepare to scan a set of inodes.
633  */
634 void
635 setinodebuf(ino_t inum)
636 {
637 
638 	if (inum % sblock.fs_ipg != 0)
639 		errx(1, "bad inode number %ju to setinodebuf", (uintmax_t)inum);
640 	lastvalidinum = inum + sblock.fs_ipg - 1;
641 	nextino = inum;
642 	lastinum = inum;
643 	readcnt = 0;
644 	if (inodebuf != NULL)
645 		return;
646 	inobufsize = blkroundup(&sblock, INOBUFSIZE);
647 	fullcnt = inobufsize / ((sblock.fs_magic == FS_UFS1_MAGIC) ?
648 	    sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
649 	readpercg = sblock.fs_ipg / fullcnt;
650 	partialcnt = sblock.fs_ipg % fullcnt;
651 	partialsize = partialcnt * ((sblock.fs_magic == FS_UFS1_MAGIC) ?
652 	    sizeof(struct ufs1_dinode) : sizeof(struct ufs2_dinode));
653 	if (partialcnt != 0) {
654 		readpercg++;
655 	} else {
656 		partialcnt = fullcnt;
657 		partialsize = inobufsize;
658 	}
659 	if ((inodebuf = malloc((unsigned)inobufsize)) == NULL)
660 		errx(1, "cannot allocate space for inode buffer");
661 }
662 
663 /*
664  * Free up data structures used to scan inodes.
665  */
666 void
667 freeinodebuf(void)
668 {
669 
670 	if (inodebuf != NULL)
671 		free(inodebuf);
672 	inodebuf = NULL;
673 }
674 
675 /*
676  * Read specified disk blocks.
677  */
678 void
679 blkread(ufs2_daddr_t bno, char *buf, long cnt)
680 {
681 
682 	if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 ||
683 	    read(fi, buf, cnt) != cnt)
684 		errx(1, "blkread failed on block %ld", (long)bno);
685 }
686 
687 /*
688  * Display updated block and i-node counts.
689  */
690 void
691 printchanges(const char *fsname, int type, struct dqblk *dp,
692     struct fileusage *fup, u_long id)
693 {
694 	if (!vflag)
695 		return;
696 	if (aflag)
697 		(void)printf("%s: ", fsname);
698 	if (fup->fu_name[0] == '\0')
699 		(void)printf("%-8lu fixed ", id);
700 	else
701 		(void)printf("%-8s fixed ", fup->fu_name);
702 	switch (type) {
703 
704 	case GRPQUOTA:
705 		(void)printf("(group):");
706 		break;
707 
708 	case USRQUOTA:
709 		(void)printf("(user): ");
710 		break;
711 
712 	default:
713 		(void)printf("(unknown quota type %d)", type);
714 		break;
715 	}
716 	if (dp->dqb_curinodes != fup->fu_curinodes)
717 		(void)printf("\tinodes %lu -> %lu", (u_long)dp->dqb_curinodes,
718 		    (u_long)fup->fu_curinodes);
719 	if (dp->dqb_curblocks != fup->fu_curblocks)
720 		(void)printf("\tblocks %lu -> %lu",
721 		    (u_long)dp->dqb_curblocks,
722 		    (u_long)fup->fu_curblocks);
723 	(void)printf("\n");
724 }
725