quota.c revision 101544 
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 const char copyright[] =
39"@(#) Copyright (c) 1980, 1990, 1993\n\
40	The Regents of the University of California.  All rights reserved.\n";
41#endif
42
43#ifndef lint
44static const char sccsid[] = "from: @(#)quota.c	8.1 (Berkeley) 6/6/93";
45#endif /* not lint */
46
47/*
48 * Disk quota reporting program.
49 */
50#include <sys/cdefs.h>
51__FBSDID("$FreeBSD: head/usr.bin/quota/quota.c 101544 2002-08-09 00:43:36Z iedowse $");
52
53#include <sys/param.h>
54#include <sys/types.h>
55#include <sys/file.h>
56#include <sys/stat.h>
57#include <sys/mount.h>
58#include <sys/socket.h>
59
60#include <rpc/rpc.h>
61#include <rpc/pmap_prot.h>
62#include <rpcsvc/rquota.h>
63
64#include <ufs/ufs/quota.h>
65
66#include <ctype.h>
67#include <err.h>
68#include <fstab.h>
69#include <grp.h>
70#include <netdb.h>
71#include <pwd.h>
72#include <stdio.h>
73#include <stdlib.h>
74#include <string.h>
75#include <unistd.h>
76
77const char *qfname = QUOTAFILENAME;
78const char *qfextension[] = INITQFNAMES;
79
80struct quotause {
81	struct	quotause *next;
82	long	flags;
83	struct	dqblk dqblk;
84	char	fsname[MAXPATHLEN + 1];
85};
86#define	FOUND	0x01
87
88static const char *timeprt(time_t seconds);
89static struct quotause *getprivs(long id, int quotatype);
90static void usage(void);
91static void showuid(u_long uid);
92static void showgid(u_long gid);
93static int alldigits(char *s);
94static void showusrname(char *name);
95static void showgrpname(char *name);
96static void showquotas(int type, u_long id, const char *name);
97static void heading(int type, u_long id, const char *name, const char *tag);
98static struct quotause *getprivs(long id, int quotatype);
99static int ufshasquota(struct fstab *fs, int type, char **qfnamep);
100static int getufsquota(struct fstab *fs, struct quotause *qup, long id,
101	int quotatype);
102static int getnfsquota(struct statfs *fst, struct quotause *qup, long id,
103	int quotatype);
104static int callaurpc(char *host, int prognum, int versnum, int procnum,
105	xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
106static int alldigits(char *s);
107
108int	qflag;
109int	vflag;
110
111int
112main(int argc, char *argv[])
113{
114	int ngroups;
115	gid_t mygid, gidset[NGROUPS];
116	int i, gflag = 0, uflag = 0;
117	char ch;
118
119	while ((ch = getopt(argc, argv, "gquv")) != -1) {
120		switch(ch) {
121		case 'g':
122			gflag++;
123			break;
124		case 'q':
125			qflag++;
126			break;
127		case 'u':
128			uflag++;
129			break;
130		case 'v':
131			vflag++;
132			break;
133		default:
134			usage();
135		}
136	}
137	argc -= optind;
138	argv += optind;
139	if (!uflag && !gflag)
140		uflag++;
141	if (argc == 0) {
142		if (uflag)
143			showuid(getuid());
144		if (gflag) {
145			mygid = getgid();
146			ngroups = getgroups(NGROUPS, gidset);
147			if (ngroups < 0)
148				err(1, "getgroups");
149			showgid(mygid);
150			for (i = 0; i < ngroups; i++)
151				if (gidset[i] != mygid)
152					showgid(gidset[i]);
153		}
154		return(0);
155	}
156	if (uflag && gflag)
157		usage();
158	if (uflag) {
159		for (; argc > 0; argc--, argv++) {
160			if (alldigits(*argv))
161				showuid(atoi(*argv));
162			else
163				showusrname(*argv);
164		}
165		return(0);
166	}
167	if (gflag) {
168		for (; argc > 0; argc--, argv++) {
169			if (alldigits(*argv))
170				showgid(atoi(*argv));
171			else
172				showgrpname(*argv);
173		}
174	}
175	return(0);
176}
177
178static void
179usage(void)
180{
181
182	fprintf(stderr, "%s\n%s\n%s\n",
183	    "usage: quota [-gu] [-v | -q]",
184	    "       quota [-u] [-v | -q] user ...",
185	    "       quota -g [-v | -q] group ...");
186	exit(1);
187}
188
189/*
190 * Print out quotas for a specified user identifier.
191 */
192static void
193showuid(u_long uid)
194{
195	struct passwd *pwd = getpwuid(uid);
196	u_long myuid;
197	const char *name;
198
199	if (pwd == NULL)
200		name = "(no account)";
201	else
202		name = pwd->pw_name;
203	myuid = getuid();
204	if (uid != myuid && myuid != 0) {
205		printf("quota: %s (uid %lu): permission denied\n", name, uid);
206		return;
207	}
208	showquotas(USRQUOTA, uid, name);
209}
210
211/*
212 * Print out quotas for a specifed user name.
213 */
214static void
215showusrname(char *name)
216{
217	struct passwd *pwd = getpwnam(name);
218	u_long myuid;
219
220	if (pwd == NULL) {
221		warnx("%s: unknown user", name);
222		return;
223	}
224	myuid = getuid();
225	if (pwd->pw_uid != myuid && myuid != 0) {
226		warnx("%s (uid %u): permission denied", name, pwd->pw_uid);
227		return;
228	}
229	showquotas(USRQUOTA, pwd->pw_uid, name);
230}
231
232/*
233 * Print out quotas for a specified group identifier.
234 */
235static void
236showgid(u_long gid)
237{
238	struct group *grp = getgrgid(gid);
239	int ngroups;
240	gid_t mygid, gidset[NGROUPS];
241	int i;
242	const char *name;
243
244	if (grp == NULL)
245		name = "(no entry)";
246	else
247		name = grp->gr_name;
248	mygid = getgid();
249	ngroups = getgroups(NGROUPS, gidset);
250	if (ngroups < 0) {
251		warn("getgroups");
252		return;
253	}
254	if (gid != mygid) {
255		for (i = 0; i < ngroups; i++)
256			if (gid == gidset[i])
257				break;
258		if (i >= ngroups && getuid() != 0) {
259			warnx("%s (gid %lu): permission denied", name, gid);
260			return;
261		}
262	}
263	showquotas(GRPQUOTA, gid, name);
264}
265
266/*
267 * Print out quotas for a specifed group name.
268 */
269static void
270showgrpname(char *name)
271{
272	struct group *grp = getgrnam(name);
273	int ngroups;
274	gid_t mygid, gidset[NGROUPS];
275	int i;
276
277	if (grp == NULL) {
278		warnx("%s: unknown group", name);
279		return;
280	}
281	mygid = getgid();
282	ngroups = getgroups(NGROUPS, gidset);
283	if (ngroups < 0) {
284		warn("getgroups");
285		return;
286	}
287	if (grp->gr_gid != mygid) {
288		for (i = 0; i < ngroups; i++)
289			if (grp->gr_gid == gidset[i])
290				break;
291		if (i >= ngroups && getuid() != 0) {
292			warnx("%s (gid %u): permission denied", name,
293						grp->gr_gid);
294			return;
295		}
296	}
297	showquotas(GRPQUOTA, grp->gr_gid, name);
298}
299
300static void
301showquotas(int type, u_long id, const char *name)
302{
303	struct quotause *qup;
304	struct quotause *quplist;
305	const char *msgi, *msgb;
306	const char *nam;
307	int lines = 0;
308	static time_t now;
309
310	if (now == 0)
311		time(&now);
312	quplist = getprivs(id, type);
313	for (qup = quplist; qup; qup = qup->next) {
314		if (!vflag &&
315		    qup->dqblk.dqb_isoftlimit == 0 &&
316		    qup->dqblk.dqb_ihardlimit == 0 &&
317		    qup->dqblk.dqb_bsoftlimit == 0 &&
318		    qup->dqblk.dqb_bhardlimit == 0)
319			continue;
320		msgi = (char *)0;
321		if (qup->dqblk.dqb_ihardlimit &&
322		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_ihardlimit)
323			msgi = "File limit reached on";
324		else if (qup->dqblk.dqb_isoftlimit &&
325		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_isoftlimit) {
326			if (qup->dqblk.dqb_itime > now)
327				msgi = "In file grace period on";
328			else
329				msgi = "Over file quota on";
330		}
331		msgb = (char *)0;
332		if (qup->dqblk.dqb_bhardlimit &&
333		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bhardlimit)
334			msgb = "Block limit reached on";
335		else if (qup->dqblk.dqb_bsoftlimit &&
336		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bsoftlimit) {
337			if (qup->dqblk.dqb_btime > now)
338				msgb = "In block grace period on";
339			else
340				msgb = "Over block quota on";
341		}
342		if (qflag) {
343			if ((msgi != (char *)0 || msgb != (char *)0) &&
344			    lines++ == 0)
345				heading(type, id, name, "");
346			if (msgi != (char *)0)
347				printf("\t%s %s\n", msgi, qup->fsname);
348			if (msgb != (char *)0)
349				printf("\t%s %s\n", msgb, qup->fsname);
350			continue;
351		}
352		if (vflag ||
353		    qup->dqblk.dqb_curblocks ||
354		    qup->dqblk.dqb_curinodes) {
355			if (lines++ == 0)
356				heading(type, id, name, "");
357			nam = qup->fsname;
358			if (strlen(qup->fsname) > 15) {
359				printf("%s\n", qup->fsname);
360				nam = "";
361			}
362			printf("%15s%8lu%c%7lu%8lu%8s"
363				, nam
364				, (u_long) (dbtob(qup->dqblk.dqb_curblocks)
365					    / 1024)
366				, (msgb == (char *)0) ? ' ' : '*'
367				, (u_long) (dbtob(qup->dqblk.dqb_bsoftlimit)
368					    / 1024)
369				, (u_long) (dbtob(qup->dqblk.dqb_bhardlimit)
370					    / 1024)
371				, (msgb == (char *)0) ? ""
372				    :timeprt(qup->dqblk.dqb_btime));
373			printf("%8lu%c%7lu%8lu%8s\n"
374				, (u_long)qup->dqblk.dqb_curinodes
375				, (msgi == (char *)0) ? ' ' : '*'
376				, (u_long)qup->dqblk.dqb_isoftlimit
377				, (u_long)qup->dqblk.dqb_ihardlimit
378				, (msgi == (char *)0) ? ""
379				    : timeprt(qup->dqblk.dqb_itime)
380			);
381			continue;
382		}
383	}
384	if (!qflag && lines == 0)
385		heading(type, id, name, "none");
386}
387
388static void
389heading(int type, u_long id, const char *name, const char *tag)
390{
391
392	printf("Disk quotas for %s %s (%cid %lu): %s\n", qfextension[type],
393	    name, *qfextension[type], id, tag);
394	if (!qflag && tag[0] == '\0') {
395		printf("%15s%8s %7s%8s%8s%8s %7s%8s%8s\n"
396			, "Filesystem"
397			, "usage"
398			, "quota"
399			, "limit"
400			, "grace"
401			, "files"
402			, "quota"
403			, "limit"
404			, "grace"
405		);
406	}
407}
408
409/*
410 * Calculate the grace period and return a printable string for it.
411 */
412static const char *
413timeprt(time_t seconds)
414{
415	time_t hours, minutes;
416	static char buf[20];
417	static time_t now;
418
419	if (now == 0)
420		time(&now);
421	if (now > seconds)
422		return ("none");
423	seconds -= now;
424	minutes = (seconds + 30) / 60;
425	hours = (minutes + 30) / 60;
426	if (hours >= 36) {
427		sprintf(buf, "%lddays", ((long)hours + 12) / 24);
428		return (buf);
429	}
430	if (minutes >= 60) {
431		sprintf(buf, "%2ld:%ld", (long)minutes / 60,
432		    (long)minutes % 60);
433		return (buf);
434	}
435	sprintf(buf, "%2ld", (long)minutes);
436	return (buf);
437}
438
439/*
440 * Collect the requested quota information.
441 */
442static struct quotause *
443getprivs(long id, int quotatype)
444{
445	struct quotause *qup, *quptail = NULL;
446	struct fstab *fs;
447	struct quotause *quphead;
448	struct statfs *fst;
449	int nfst, i;
450
451	qup = quphead = (struct quotause *)0;
452
453	nfst = getmntinfo(&fst, MNT_NOWAIT);
454	if (nfst == 0)
455		errx(2, "no filesystems mounted!");
456	setfsent();
457	for (i=0; i<nfst; i++) {
458		if (qup == NULL) {
459			if ((qup = (struct quotause *)malloc(sizeof *qup))
460			    == NULL)
461				errx(2, "out of memory");
462		}
463		if (strcmp(fst[i].f_fstypename, "nfs") == 0) {
464			if (getnfsquota(&fst[i], qup, id, quotatype)
465			    == 0)
466				continue;
467		} else if (strcmp(fst[i].f_fstypename, "ufs") == 0) {
468			/*
469			 * XXX
470			 * UFS filesystems must be in /etc/fstab, and must
471			 * indicate that they have quotas on (?!) This is quite
472			 * unlike SunOS where quotas can be enabled/disabled
473			 * on a filesystem independent of /etc/fstab, and it
474			 * will still print quotas for them.
475			 */
476			if ((fs = getfsspec(fst[i].f_mntfromname)) == NULL)
477				continue;
478			if (getufsquota(fs, qup, id, quotatype) == 0)
479				continue;
480		} else
481			continue;
482		strcpy(qup->fsname, fst[i].f_mntonname);
483		if (quphead == NULL)
484			quphead = qup;
485		else
486			quptail->next = qup;
487		quptail = qup;
488		quptail->next = 0;
489		qup = NULL;
490	}
491	if (qup)
492		free(qup);
493	endfsent();
494	return (quphead);
495}
496
497/*
498 * Check to see if a particular quota is to be enabled.
499 */
500static int
501ufshasquota(struct fstab *fs, int type, char **qfnamep)
502{
503	static char initname, usrname[100], grpname[100];
504	static char buf[BUFSIZ];
505	char *opt, *cp;
506
507	if (!initname) {
508		sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
509		sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
510		initname = 1;
511	}
512	strcpy(buf, fs->fs_mntops);
513	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
514		if ((cp = index(opt, '=')))
515			*cp++ = '\0';
516		if (type == USRQUOTA && strcmp(opt, usrname) == 0)
517			break;
518		if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
519			break;
520	}
521	if (!opt)
522		return (0);
523	if (cp) {
524		*qfnamep = cp;
525		return (1);
526	}
527	(void) sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
528	*qfnamep = buf;
529	return (1);
530}
531
532static int
533getufsquota(struct fstab *fs, struct quotause *qup, long id, int quotatype)
534{
535	char *qfpathname;
536	int fd, qcmd;
537
538	qcmd = QCMD(Q_GETQUOTA, quotatype);
539	if (!ufshasquota(fs, quotatype, &qfpathname))
540		return (0);
541
542	if (quotactl(fs->fs_file, qcmd, id, (char *)&qup->dqblk) != 0) {
543		if ((fd = open(qfpathname, O_RDONLY)) < 0) {
544			warn("%s", qfpathname);
545			return (0);
546		}
547		(void) lseek(fd, (off_t)(id * sizeof(struct dqblk)), L_SET);
548		switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
549		case 0:				/* EOF */
550			/*
551			 * Convert implicit 0 quota (EOF)
552			 * into an explicit one (zero'ed dqblk)
553			 */
554			bzero((caddr_t)&qup->dqblk, sizeof(struct dqblk));
555			break;
556		case sizeof(struct dqblk):	/* OK */
557			break;
558		default:		/* ERROR */
559			warn("read error: %s", qfpathname);
560			close(fd);
561			return (0);
562		}
563		close(fd);
564	}
565	return (1);
566}
567
568static int
569getnfsquota(struct statfs *fst, struct quotause *qup, long id, int quotatype)
570{
571	struct getquota_args gq_args;
572	struct getquota_rslt gq_rslt;
573	struct dqblk *dqp = &qup->dqblk;
574	struct timeval tv;
575	char *cp;
576
577	if (fst->f_flags & MNT_LOCAL)
578		return (0);
579
580	/*
581	 * rpc.rquotad does not support group quotas
582	 */
583	if (quotatype != USRQUOTA)
584		return (0);
585
586	/*
587	 * must be some form of "hostname:/path"
588	 */
589	cp = strchr(fst->f_mntfromname, ':');
590	if (cp == NULL) {
591		warnx("cannot find hostname for %s", fst->f_mntfromname);
592		return (0);
593	}
594
595	*cp = '\0';
596	if (*(cp+1) != '/') {
597		*cp = ':';
598		return (0);
599	}
600
601	/* Avoid attempting the RPC for special amd(8) filesystems. */
602	if (strncmp(fst->f_mntfromname, "pid", 3) == 0 &&
603	    strchr(fst->f_mntfromname, '@') != NULL) {
604		*cp = ':';
605		return (0);
606	}
607
608	gq_args.gqa_pathp = cp + 1;
609	gq_args.gqa_uid = id;
610	if (callaurpc(fst->f_mntfromname, RQUOTAPROG, RQUOTAVERS,
611	    RQUOTAPROC_GETQUOTA, (xdrproc_t)xdr_getquota_args, (char *)&gq_args,
612	    (xdrproc_t)xdr_getquota_rslt, (char *)&gq_rslt) != 0) {
613		*cp = ':';
614		return (0);
615	}
616
617	switch (gq_rslt.status) {
618	case Q_NOQUOTA:
619		break;
620	case Q_EPERM:
621		warnx("quota permission error, host: %s",
622			fst->f_mntfromname);
623		break;
624	case Q_OK:
625		gettimeofday(&tv, NULL);
626			/* blocks*/
627		dqp->dqb_bhardlimit =
628		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit *
629		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE;
630		dqp->dqb_bsoftlimit =
631		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit *
632		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE;
633		dqp->dqb_curblocks =
634		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks *
635		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE;
636			/* inodes */
637		dqp->dqb_ihardlimit =
638			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit;
639		dqp->dqb_isoftlimit =
640			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit;
641		dqp->dqb_curinodes =
642			gq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles;
643			/* grace times */
644		dqp->dqb_btime =
645		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft;
646		dqp->dqb_itime =
647		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft;
648		*cp = ':';
649		return (1);
650	default:
651		warnx("bad rpc result, host: %s", fst->f_mntfromname);
652		break;
653	}
654	*cp = ':';
655	return (0);
656}
657
658static int
659callaurpc(char *host, int prognum, int versnum, int procnum,
660    xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
661{
662	struct sockaddr_in server_addr;
663	enum clnt_stat clnt_stat;
664	struct hostent *hp;
665	struct timeval timeout, tottimeout;
666
667	CLIENT *client = NULL;
668	int sock = RPC_ANYSOCK;
669
670	if ((hp = gethostbyname(host)) == NULL)
671		return ((int) RPC_UNKNOWNHOST);
672	timeout.tv_usec = 0;
673	timeout.tv_sec = 6;
674	bcopy(hp->h_addr, &server_addr.sin_addr,
675			MIN(hp->h_length,(int)sizeof(server_addr.sin_addr)));
676	server_addr.sin_family = AF_INET;
677	server_addr.sin_port =  0;
678
679	if ((client = clntudp_create(&server_addr, prognum,
680	    versnum, timeout, &sock)) == NULL)
681		return ((int) rpc_createerr.cf_stat);
682
683	client->cl_auth = authunix_create_default();
684	tottimeout.tv_sec = 25;
685	tottimeout.tv_usec = 0;
686	clnt_stat = clnt_call(client, procnum, inproc, in,
687	    outproc, out, tottimeout);
688
689	return ((int) clnt_stat);
690}
691
692static int
693alldigits(char *s)
694{
695	int c;
696
697	c = *s++;
698	do {
699		if (!isdigit(c))
700			return (0);
701	} while ((c = *s++));
702	return (1);
703}
704