quotacheck.c revision 1559 
1/*
2 * Copyright (c) 1980, 1990, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Robert Elz at The University of Melbourne.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38static char copyright[] =
39"@(#) Copyright (c) 1980, 1990, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif /* not lint */
42
43#ifndef lint
44static char sccsid[] = "@(#)quotacheck.c	8.3 (Berkeley) 1/29/94";
45#endif /* not lint */
46
47/*
48 * Fix up / report on disk quotas & usage
49 */
50#include <sys/param.h>
51#include <sys/stat.h>
52
53#include <ufs/ufs/dinode.h>
54#include <ufs/ufs/quota.h>
55#include <ufs/ffs/fs.h>
56
57#include <fcntl.h>
58#include <fstab.h>
59#include <pwd.h>
60#include <grp.h>
61#include <errno.h>
62#include <unistd.h>
63#include <stdio.h>
64#include <stdlib.h>
65#include <string.h>
66
67char *qfname = QUOTAFILENAME;
68char *qfextension[] = INITQFNAMES;
69char *quotagroup = QUOTAGROUP;
70
71union {
72	struct	fs	sblk;
73	char	dummy[MAXBSIZE];
74} un;
75#define	sblock	un.sblk
76long dev_bsize = 1;
77long maxino;
78
79struct quotaname {
80	long	flags;
81	char	grpqfname[MAXPATHLEN + 1];
82	char	usrqfname[MAXPATHLEN + 1];
83};
84#define	HASUSR	1
85#define	HASGRP	2
86
87struct fileusage {
88	struct	fileusage *fu_next;
89	u_long	fu_curinodes;
90	u_long	fu_curblocks;
91	u_long	fu_id;
92	char	fu_name[1];
93	/* actually bigger */
94};
95#define FUHASH 1024	/* must be power of two */
96struct fileusage *fuhead[MAXQUOTAS][FUHASH];
97
98int	aflag;			/* all file systems */
99int	gflag;			/* check group quotas */
100int	uflag;			/* check user quotas */
101int	vflag;			/* verbose */
102int	fi;			/* open disk file descriptor */
103u_long	highid[MAXQUOTAS];	/* highest addid()'ed identifier per type */
104
105struct fileusage *
106	 addid __P((u_long, int, char *));
107char	*blockcheck __P((char *));
108void	 bread __P((daddr_t, char *, long));
109int	 chkquota __P((char *, char *, struct quotaname *));
110void	 err __P((const char *, ...));
111void	 freeinodebuf __P((void));
112struct dinode *
113	 getnextinode __P((ino_t));
114int	 getquotagid __P((void));
115int	 hasquota __P((struct fstab *, int, char **));
116struct fileusage *
117	 lookup __P((u_long, int));
118void	*needchk __P((struct fstab *));
119int	 oneof __P((char *, char*[], int));
120void	 resetinodebuf __P((void));
121int	 update __P((char *, char *, int));
122void	 usage __P((void));
123
124int
125main(argc, argv)
126	int argc;
127	char *argv[];
128{
129	register struct fstab *fs;
130	register struct passwd *pw;
131	register struct group *gr;
132	struct quotaname *auxdata;
133	int i, argnum, maxrun, errs;
134	long done = 0;
135	char ch, *name;
136
137	errs = maxrun = 0;
138	while ((ch = getopt(argc, argv, "aguvl:")) != EOF) {
139		switch(ch) {
140		case 'a':
141			aflag++;
142			break;
143		case 'g':
144			gflag++;
145			break;
146		case 'u':
147			uflag++;
148			break;
149		case 'v':
150			vflag++;
151			break;
152		case 'l':
153			maxrun = atoi(optarg);
154			break;
155		default:
156			usage();
157		}
158	}
159	argc -= optind;
160	argv += optind;
161	if ((argc == 0 && !aflag) || (argc > 0 && aflag))
162		usage();
163	if (!gflag && !uflag) {
164		gflag++;
165		uflag++;
166	}
167	if (gflag) {
168		setgrent();
169		while ((gr = getgrent()) != 0)
170			(void) addid((u_long)gr->gr_gid, GRPQUOTA, gr->gr_name);
171		endgrent();
172	}
173	if (uflag) {
174		setpwent();
175		while ((pw = getpwent()) != 0)
176			(void) addid((u_long)pw->pw_uid, USRQUOTA, pw->pw_name);
177		endpwent();
178	}
179	if (aflag)
180		exit(checkfstab(1, maxrun, needchk, chkquota));
181	if (setfsent() == 0)
182		err("%s: can't open", FSTAB);
183	while ((fs = getfsent()) != NULL) {
184		if (((argnum = oneof(fs->fs_file, argv, argc)) >= 0 ||
185		    (argnum = oneof(fs->fs_spec, argv, argc)) >= 0) &&
186		    (auxdata = needchk(fs)) &&
187		    (name = blockcheck(fs->fs_spec))) {
188			done |= 1 << argnum;
189			errs += chkquota(name, fs->fs_file, auxdata);
190		}
191	}
192	endfsent();
193	for (i = 0; i < argc; i++)
194		if ((done & (1 << i)) == 0)
195			fprintf(stderr, "%s not found in %s\n",
196				argv[i], FSTAB);
197	exit(errs);
198}
199
200void
201usage()
202{
203	(void)fprintf(stderr, "usage:\t%s\n\t%s\n",
204		"quotacheck -a [-guv]",
205		"quotacheck [-guv] filesys ...");
206	exit(1);
207}
208
209void *
210needchk(fs)
211	register struct fstab *fs;
212{
213	register struct quotaname *qnp;
214	char *qfnp;
215
216	if (strcmp(fs->fs_vfstype, "ufs") ||
217	    strcmp(fs->fs_type, FSTAB_RW))
218		return (NULL);
219	if ((qnp = malloc(sizeof(*qnp))) == NULL)
220		err("%s", strerror(errno));
221	qnp->flags = 0;
222	if (gflag && hasquota(fs, GRPQUOTA, &qfnp)) {
223		strcpy(qnp->grpqfname, qfnp);
224		qnp->flags |= HASGRP;
225	}
226	if (uflag && hasquota(fs, USRQUOTA, &qfnp)) {
227		strcpy(qnp->usrqfname, qfnp);
228		qnp->flags |= HASUSR;
229	}
230	if (qnp->flags)
231		return (qnp);
232	free(qnp);
233	return (NULL);
234}
235
236/*
237 * Scan the specified filesystem to check quota(s) present on it.
238 */
239int
240chkquota(fsname, mntpt, qnp)
241	char *fsname, *mntpt;
242	register struct quotaname *qnp;
243{
244	register struct fileusage *fup;
245	register struct dinode *dp;
246	int cg, i, mode, errs = 0;
247	ino_t ino;
248
249	if ((fi = open(fsname, O_RDONLY, 0)) < 0) {
250		perror(fsname);
251		return (1);
252	}
253	if (vflag) {
254		(void)printf("*** Checking ");
255		if (qnp->flags & HASUSR)
256			(void)printf("%s%s", qfextension[USRQUOTA],
257			    (qnp->flags & HASGRP) ? " and " : "");
258		if (qnp->flags & HASGRP)
259			(void)printf("%s", qfextension[GRPQUOTA]);
260		(void)printf(" quotas for %s (%s)\n", fsname, mntpt);
261	}
262	sync();
263	bread(SBOFF, (char *)&sblock, (long)SBSIZE);
264	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
265	maxino = sblock.fs_ncg * sblock.fs_ipg;
266	resetinodebuf();
267	for (ino = 0, cg = 0; cg < sblock.fs_ncg; cg++) {
268		for (i = 0; i < sblock.fs_ipg; i++, ino++) {
269			if (ino < ROOTINO)
270				continue;
271			if ((dp = getnextinode(ino)) == NULL)
272				continue;
273			if ((mode = dp->di_mode & IFMT) == 0)
274				continue;
275			if (qnp->flags & HASGRP) {
276				fup = addid((u_long)dp->di_gid, GRPQUOTA,
277				    (char *)0);
278				fup->fu_curinodes++;
279				if (mode == IFREG || mode == IFDIR ||
280				    mode == IFLNK)
281					fup->fu_curblocks += dp->di_blocks;
282			}
283			if (qnp->flags & HASUSR) {
284				fup = addid((u_long)dp->di_uid, USRQUOTA,
285				    (char *)0);
286				fup->fu_curinodes++;
287				if (mode == IFREG || mode == IFDIR ||
288				    mode == IFLNK)
289					fup->fu_curblocks += dp->di_blocks;
290			}
291		}
292	}
293	freeinodebuf();
294	if (qnp->flags & HASUSR)
295		errs += update(mntpt, qnp->usrqfname, USRQUOTA);
296	if (qnp->flags & HASGRP)
297		errs += update(mntpt, qnp->grpqfname, GRPQUOTA);
298	close(fi);
299	return (errs);
300}
301
302/*
303 * Update a specified quota file.
304 */
305int
306update(fsname, quotafile, type)
307	char *fsname, *quotafile;
308	register int type;
309{
310	register struct fileusage *fup;
311	register FILE *qfi, *qfo;
312	register u_long id, lastid;
313	struct dqblk dqbuf;
314	static int warned = 0;
315	static struct dqblk zerodqbuf;
316	static struct fileusage zerofileusage;
317
318	if ((qfo = fopen(quotafile, "r+")) == NULL) {
319		if (errno == ENOENT)
320			qfo = fopen(quotafile, "w+");
321		if (qfo) {
322			(void) fprintf(stderr,
323			    "quotacheck: creating quota file %s\n", quotafile);
324#define	MODE	(S_IRUSR|S_IWUSR|S_IRGRP)
325			(void) fchown(fileno(qfo), getuid(), getquotagid());
326			(void) fchmod(fileno(qfo), MODE);
327		} else {
328			(void) fprintf(stderr,
329			    "quotacheck: %s: %s\n", quotafile, strerror(errno));
330			return (1);
331		}
332	}
333	if ((qfi = fopen(quotafile, "r")) == NULL) {
334		(void) fprintf(stderr,
335		    "quotacheck: %s: %s\n", quotafile, strerror(errno));
336		(void) fclose(qfo);
337		return (1);
338	}
339	if (quotactl(fsname, QCMD(Q_SYNC, type), (u_long)0, (caddr_t)0) < 0 &&
340	    errno == EOPNOTSUPP && !warned && vflag) {
341		warned++;
342		(void)printf("*** Warning: %s\n",
343		    "Quotas are not compiled into this kernel");
344	}
345	for (lastid = highid[type], id = 0; id <= lastid; id++) {
346		if (fread((char *)&dqbuf, sizeof(struct dqblk), 1, qfi) == 0)
347			dqbuf = zerodqbuf;
348		if ((fup = lookup(id, type)) == 0)
349			fup = &zerofileusage;
350		if (dqbuf.dqb_curinodes == fup->fu_curinodes &&
351		    dqbuf.dqb_curblocks == fup->fu_curblocks) {
352			fup->fu_curinodes = 0;
353			fup->fu_curblocks = 0;
354			fseek(qfo, (long)sizeof(struct dqblk), 1);
355			continue;
356		}
357		if (vflag) {
358			if (aflag)
359				printf("%s: ", fsname);
360			printf("%-8s fixed:", fup->fu_name);
361			if (dqbuf.dqb_curinodes != fup->fu_curinodes)
362				(void)printf("\tinodes %d -> %d",
363					dqbuf.dqb_curinodes, fup->fu_curinodes);
364			if (dqbuf.dqb_curblocks != fup->fu_curblocks)
365				(void)printf("\tblocks %d -> %d",
366					dqbuf.dqb_curblocks, fup->fu_curblocks);
367			(void)printf("\n");
368		}
369		/*
370		 * Reset time limit if have a soft limit and were
371		 * previously under it, but are now over it.
372		 */
373		if (dqbuf.dqb_bsoftlimit &&
374		    dqbuf.dqb_curblocks < dqbuf.dqb_bsoftlimit &&
375		    fup->fu_curblocks >= dqbuf.dqb_bsoftlimit)
376			dqbuf.dqb_btime = 0;
377		if (dqbuf.dqb_isoftlimit &&
378		    dqbuf.dqb_curblocks < dqbuf.dqb_isoftlimit &&
379		    fup->fu_curblocks >= dqbuf.dqb_isoftlimit)
380			dqbuf.dqb_itime = 0;
381		dqbuf.dqb_curinodes = fup->fu_curinodes;
382		dqbuf.dqb_curblocks = fup->fu_curblocks;
383		fwrite((char *)&dqbuf, sizeof(struct dqblk), 1, qfo);
384		(void) quotactl(fsname, QCMD(Q_SETUSE, type), id,
385		    (caddr_t)&dqbuf);
386		fup->fu_curinodes = 0;
387		fup->fu_curblocks = 0;
388	}
389	fclose(qfi);
390	fflush(qfo);
391	ftruncate(fileno(qfo),
392	    (off_t)((highid[type] + 1) * sizeof(struct dqblk)));
393	fclose(qfo);
394	return (0);
395}
396
397/*
398 * Check to see if target appears in list of size cnt.
399 */
400int
401oneof(target, list, cnt)
402	register char *target, *list[];
403	int cnt;
404{
405	register int i;
406
407	for (i = 0; i < cnt; i++)
408		if (strcmp(target, list[i]) == 0)
409			return (i);
410	return (-1);
411}
412
413/*
414 * Determine the group identifier for quota files.
415 */
416int
417getquotagid()
418{
419	struct group *gr;
420
421	if (gr = getgrnam(quotagroup))
422		return (gr->gr_gid);
423	return (-1);
424}
425
426/*
427 * Check to see if a particular quota is to be enabled.
428 */
429int
430hasquota(fs, type, qfnamep)
431	register struct fstab *fs;
432	int type;
433	char **qfnamep;
434{
435	register char *opt;
436	char *cp;
437	static char initname, usrname[100], grpname[100];
438	static char buf[BUFSIZ];
439
440	if (!initname) {
441		(void)snprintf(usrname, sizeof(usrname),
442		    "%s%s", qfextension[USRQUOTA], qfname);
443		(void)snprintf(grpname, sizeof(grpname),
444		    "%s%s", qfextension[GRPQUOTA], qfname);
445		initname = 1;
446	}
447	strcpy(buf, fs->fs_mntops);
448	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
449		if (cp = index(opt, '='))
450			*cp++ = '\0';
451		if (type == USRQUOTA && strcmp(opt, usrname) == 0)
452			break;
453		if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
454			break;
455	}
456	if (!opt)
457		return (0);
458	if (cp)
459		*qfnamep = cp;
460	else {
461		(void)snprintf(buf, sizeof(buf),
462		    "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
463		*qfnamep = buf;
464	}
465	return (1);
466}
467
468/*
469 * Routines to manage the file usage table.
470 *
471 * Lookup an id of a specific type.
472 */
473struct fileusage *
474lookup(id, type)
475	u_long id;
476	int type;
477{
478	register struct fileusage *fup;
479
480	for (fup = fuhead[type][id & (FUHASH-1)]; fup != 0; fup = fup->fu_next)
481		if (fup->fu_id == id)
482			return (fup);
483	return (NULL);
484}
485
486/*
487 * Add a new file usage id if it does not already exist.
488 */
489struct fileusage *
490addid(id, type, name)
491	u_long id;
492	int type;
493	char *name;
494{
495	struct fileusage *fup, **fhp;
496	int len;
497
498	if (fup = lookup(id, type))
499		return (fup);
500	if (name)
501		len = strlen(name);
502	else
503		len = 10;
504	if ((fup = calloc(1, sizeof(*fup) + len)) == NULL)
505		err("%s", strerror(errno));
506	fhp = &fuhead[type][id & (FUHASH - 1)];
507	fup->fu_next = *fhp;
508	*fhp = fup;
509	fup->fu_id = id;
510	if (id > highid[type])
511		highid[type] = id;
512	if (name)
513		bcopy(name, fup->fu_name, len + 1);
514	else
515		(void)sprintf(fup->fu_name, "%u", id);
516	return (fup);
517}
518
519/*
520 * Special purpose version of ginode used to optimize pass
521 * over all the inodes in numerical order.
522 */
523ino_t nextino, lastinum;
524long readcnt, readpercg, fullcnt, inobufsize, partialcnt, partialsize;
525struct dinode *inodebuf;
526#define	INOBUFSIZE	56*1024	/* size of buffer to read inodes */
527
528struct dinode *
529getnextinode(inumber)
530	ino_t inumber;
531{
532	long size;
533	daddr_t dblk;
534	static struct dinode *dp;
535
536	if (inumber != nextino++ || inumber > maxino)
537		err("bad inode number %d to nextinode", inumber);
538	if (inumber >= lastinum) {
539		readcnt++;
540		dblk = fsbtodb(&sblock, ino_to_fsba(&sblock, lastinum));
541		if (readcnt % readpercg == 0) {
542			size = partialsize;
543			lastinum += partialcnt;
544		} else {
545			size = inobufsize;
546			lastinum += fullcnt;
547		}
548		bread(dblk, (char *)inodebuf, size);
549		dp = inodebuf;
550	}
551	return (dp++);
552}
553
554/*
555 * Prepare to scan a set of inodes.
556 */
557void
558resetinodebuf()
559{
560
561	nextino = 0;
562	lastinum = 0;
563	readcnt = 0;
564	inobufsize = blkroundup(&sblock, INOBUFSIZE);
565	fullcnt = inobufsize / sizeof(struct dinode);
566	readpercg = sblock.fs_ipg / fullcnt;
567	partialcnt = sblock.fs_ipg % fullcnt;
568	partialsize = partialcnt * sizeof(struct dinode);
569	if (partialcnt != 0) {
570		readpercg++;
571	} else {
572		partialcnt = fullcnt;
573		partialsize = inobufsize;
574	}
575	if (inodebuf == NULL &&
576	   (inodebuf = malloc((u_int)inobufsize)) == NULL)
577		err("%s", strerror(errno));
578	while (nextino < ROOTINO)
579		getnextinode(nextino);
580}
581
582/*
583 * Free up data structures used to scan inodes.
584 */
585void
586freeinodebuf()
587{
588
589	if (inodebuf != NULL)
590		free(inodebuf);
591	inodebuf = NULL;
592}
593
594/*
595 * Read specified disk blocks.
596 */
597void
598bread(bno, buf, cnt)
599	daddr_t bno;
600	char *buf;
601	long cnt;
602{
603
604	if (lseek(fi, (off_t)bno * dev_bsize, SEEK_SET) < 0 ||
605	    read(fi, buf, cnt) != cnt)
606		err("block %ld", bno);
607}
608
609#if __STDC__
610#include <stdarg.h>
611#else
612#include <varargs.h>
613#endif
614
615void
616#if __STDC__
617err(const char *fmt, ...)
618#else
619err(fmt, va_alist)
620	char *fmt;
621        va_dcl
622#endif
623{
624	va_list ap;
625#if __STDC__
626	va_start(ap, fmt);
627#else
628	va_start(ap);
629#endif
630	(void)fprintf(stderr, "quotacheck: ");
631	(void)vfprintf(stderr, fmt, ap);
632	va_end(ap);
633	(void)fprintf(stderr, "\n");
634	exit(1);
635	/* NOTREACHED */
636}
637