quota.c revision 223690 
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 * 4. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#ifndef lint
34static const char copyright[] =
35"@(#) Copyright (c) 1980, 1990, 1993\n\
36	The Regents of the University of California.  All rights reserved.\n";
37#endif
38
39#ifndef lint
40static const char sccsid[] = "from: @(#)quota.c	8.1 (Berkeley) 6/6/93";
41#endif /* not lint */
42
43/*
44 * Disk quota reporting program.
45 */
46#include <sys/cdefs.h>
47__FBSDID("$FreeBSD: head/usr.bin/quota/quota.c 223690 2011-06-30 09:20:26Z pluknet $");
48
49#include <sys/param.h>
50#include <sys/types.h>
51#include <sys/file.h>
52#include <sys/stat.h>
53#include <sys/mount.h>
54#include <sys/socket.h>
55
56#include <rpc/rpc.h>
57#include <rpc/pmap_prot.h>
58#include <rpcsvc/rquota.h>
59
60#include <ufs/ufs/quota.h>
61
62#include <ctype.h>
63#include <err.h>
64#include <fstab.h>
65#include <grp.h>
66#include <libutil.h>
67#include <netdb.h>
68#include <pwd.h>
69#include <stdio.h>
70#include <stdint.h>
71#include <stdlib.h>
72#include <string.h>
73#include <time.h>
74#include <unistd.h>
75
76const char *qfname = QUOTAFILENAME;
77const char *qfextension[] = INITQFNAMES;
78
79struct quotause {
80	struct	quotause *next;
81	long	flags;
82	struct	dqblk dqblk;
83	char	fsname[MAXPATHLEN + 1];
84};
85
86static char *timeprt(int64_t seconds);
87static struct quotause *getprivs(long id, int quotatype);
88static void usage(void);
89static int showuid(u_long uid);
90static int showgid(u_long gid);
91static int showusrname(char *name);
92static int showgrpname(char *name);
93static int showquotas(int type, u_long id, const char *name);
94static void showrawquotas(int type, u_long id, struct quotause *qup);
95static void heading(int type, u_long id, const char *name, const char *tag);
96static int getufsquota(struct fstab *fs, struct quotause *qup, long id,
97	int quotatype);
98static int getnfsquota(struct statfs *fst, struct quotause *qup, long id,
99	int quotatype);
100static int callaurpc(char *host, int prognum, int versnum, int procnum,
101	xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
102static int alldigits(char *s);
103
104int	hflag;
105int	lflag;
106int	rflag;
107int	qflag;
108int	vflag;
109char	*filename = NULL;
110
111int
112main(int argc, char *argv[])
113{
114	int ngroups;
115	gid_t mygid, gidset[NGROUPS];
116	int i, ch, gflag = 0, uflag = 0, errflag = 0;
117
118	while ((ch = getopt(argc, argv, "f:ghlrquv")) != -1) {
119		switch(ch) {
120		case 'f':
121			filename = optarg;
122			break;
123		case 'g':
124			gflag++;
125			break;
126		case 'h':
127			hflag++;
128			break;
129		case 'l':
130			lflag++;
131			break;
132		case 'q':
133			qflag++;
134			break;
135		case 'r':
136			rflag++;
137			break;
138		case 'u':
139			uflag++;
140			break;
141		case 'v':
142			vflag++;
143			break;
144		default:
145			usage();
146		}
147	}
148	argc -= optind;
149	argv += optind;
150	if (!uflag && !gflag)
151		uflag++;
152	if (argc == 0) {
153		if (uflag)
154			errflag += showuid(getuid());
155		if (gflag) {
156			mygid = getgid();
157			ngroups = getgroups(NGROUPS, gidset);
158			if (ngroups < 0)
159				err(1, "getgroups");
160			errflag += showgid(mygid);
161			for (i = 0; i < ngroups; i++)
162				if (gidset[i] != mygid)
163					errflag += showgid(gidset[i]);
164		}
165		return(errflag);
166	}
167	if (uflag && gflag)
168		usage();
169	if (uflag) {
170		for (; argc > 0; argc--, argv++) {
171			if (alldigits(*argv))
172				errflag += showuid(atoi(*argv));
173			else
174				errflag += showusrname(*argv);
175		}
176		return(errflag);
177	}
178	if (gflag) {
179		for (; argc > 0; argc--, argv++) {
180			if (alldigits(*argv))
181				errflag += showgid(atoi(*argv));
182			else
183				errflag += showgrpname(*argv);
184		}
185	}
186	return(errflag);
187}
188
189static void
190usage(void)
191{
192
193	fprintf(stderr, "%s\n%s\n%s\n",
194	    "usage: quota [-ghlu] [-f path] [-v | -q | -r]",
195	    "       quota [-hlu] [-f path] [-v | -q | -r] user ...",
196	    "       quota -g [-hl] [-f path] [-v | -q | -r] group ...");
197	exit(1);
198}
199
200/*
201 * Print out quotas for a specified user identifier.
202 */
203static int
204showuid(u_long uid)
205{
206	struct passwd *pwd = getpwuid(uid);
207	const char *name;
208
209	if (pwd == NULL)
210		name = "(no account)";
211	else
212		name = pwd->pw_name;
213	return(showquotas(USRQUOTA, uid, name));
214}
215
216/*
217 * Print out quotas for a specifed user name.
218 */
219static int
220showusrname(char *name)
221{
222	struct passwd *pwd = getpwnam(name);
223
224	if (pwd == NULL) {
225		warnx("%s: unknown user", name);
226		return(1);
227	}
228	return(showquotas(USRQUOTA, pwd->pw_uid, name));
229}
230
231/*
232 * Print out quotas for a specified group identifier.
233 */
234static int
235showgid(u_long gid)
236{
237	struct group *grp = getgrgid(gid);
238	const char *name;
239
240	if (grp == NULL)
241		name = "(no entry)";
242	else
243		name = grp->gr_name;
244	return(showquotas(GRPQUOTA, gid, name));
245}
246
247/*
248 * Print out quotas for a specifed group name.
249 */
250static int
251showgrpname(char *name)
252{
253	struct group *grp = getgrnam(name);
254
255	if (grp == NULL) {
256		warnx("%s: unknown group", name);
257		return(1);
258	}
259	return(showquotas(GRPQUOTA, grp->gr_gid, name));
260}
261
262static void
263prthumanval(int len, u_int64_t bytes)
264{
265	char buf[len + 1];
266
267	/*
268	 * Limit the width to 5 bytes as that is what users expect.
269	 */
270	humanize_number(buf, sizeof(buf) < 5 ? sizeof(buf) : 5, bytes, "",
271	    HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
272
273	(void)printf(" %*s", len, buf);
274}
275
276static int
277showquotas(int type, u_long id, const char *name)
278{
279	struct quotause *qup;
280	struct quotause *quplist;
281	const char *msgi, *msgb;
282	const char *nam;
283	char *bgrace = NULL, *igrace = NULL;
284	int lines = 0, overquota = 0;
285	static time_t now;
286
287	if (now == 0)
288		time(&now);
289	quplist = getprivs(id, type);
290	for (qup = quplist; qup; qup = qup->next) {
291		msgi = NULL;
292		if (qup->dqblk.dqb_ihardlimit &&
293		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_ihardlimit) {
294			overquota++;
295			msgi = "File limit reached on";
296		}
297		else if (qup->dqblk.dqb_isoftlimit &&
298		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_isoftlimit) {
299			overquota++;
300			if (qup->dqblk.dqb_itime > now)
301				msgi = "In file grace period on";
302			else
303				msgi = "Over file quota on";
304		}
305		msgb = NULL;
306		if (qup->dqblk.dqb_bhardlimit &&
307		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bhardlimit) {
308			overquota++;
309			msgb = "Block limit reached on";
310		}
311		else if (qup->dqblk.dqb_bsoftlimit &&
312		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bsoftlimit) {
313			overquota++;
314			if (qup->dqblk.dqb_btime > now)
315				msgb = "In block grace period on";
316			else
317				msgb = "Over block quota on";
318		}
319		if (rflag) {
320			showrawquotas(type, id, qup);
321			continue;
322		}
323		if (!vflag &&
324		    qup->dqblk.dqb_isoftlimit == 0 &&
325		    qup->dqblk.dqb_ihardlimit == 0 &&
326		    qup->dqblk.dqb_bsoftlimit == 0 &&
327		    qup->dqblk.dqb_bhardlimit == 0)
328			continue;
329		if (qflag) {
330			if ((msgi != NULL || msgb != NULL) &&
331			    lines++ == 0)
332				heading(type, id, name, "");
333			if (msgi != NULL)
334				printf("\t%s %s\n", msgi, qup->fsname);
335			if (msgb != NULL)
336				printf("\t%s %s\n", msgb, qup->fsname);
337			continue;
338		}
339		if (!vflag &&
340		    qup->dqblk.dqb_curblocks == 0 &&
341		    qup->dqblk.dqb_curinodes == 0)
342			continue;
343		if (lines++ == 0)
344			heading(type, id, name, "");
345		nam = qup->fsname;
346		if (strlen(qup->fsname) > 15) {
347			printf("%s\n", qup->fsname);
348			nam = "";
349		}
350		printf("%-15s", nam);
351		if (hflag) {
352			prthumanval(7, dbtob(qup->dqblk.dqb_curblocks));
353			printf("%c", (msgb == NULL) ? ' ' : '*');
354			prthumanval(7, dbtob(qup->dqblk.dqb_bsoftlimit));
355			prthumanval(7, dbtob(qup->dqblk.dqb_bhardlimit));
356		} else {
357			printf(" %7ju%c %7ju %7ju",
358			    (uintmax_t)dbtob(qup->dqblk.dqb_curblocks)
359				/ 1024,
360			    (msgb == NULL) ? ' ' : '*',
361			    (uintmax_t)dbtob(qup->dqblk.dqb_bsoftlimit)
362				/ 1024,
363			    (uintmax_t)dbtob(qup->dqblk.dqb_bhardlimit)
364				/ 1024);
365		}
366		if (msgb != NULL)
367			bgrace = timeprt(qup->dqblk.dqb_btime);
368		if (msgi != NULL)
369			igrace = timeprt(qup->dqblk.dqb_itime);
370		printf("%8s %6ju%c %6ju %6ju%8s\n"
371			, (msgb == NULL) ? "" : bgrace
372			, (uintmax_t)qup->dqblk.dqb_curinodes
373			, (msgi == NULL) ? ' ' : '*'
374			, (uintmax_t)qup->dqblk.dqb_isoftlimit
375			, (uintmax_t)qup->dqblk.dqb_ihardlimit
376			, (msgi == NULL) ? "" : igrace
377		);
378		if (msgb != NULL)
379			free(bgrace);
380		if (msgi != NULL)
381			free(igrace);
382	}
383	if (!qflag && !rflag && lines == 0)
384		heading(type, id, name, "none");
385	return (overquota);
386}
387
388static void
389showrawquotas(int type, u_long id, struct quotause *qup)
390{
391	time_t t;
392
393	printf("Raw %s quota information for id %lu on %s\n",
394	    type == USRQUOTA ? "user" : "group", id, qup->fsname);
395	printf("block hard limit:     %ju\n",
396	    (uintmax_t)qup->dqblk.dqb_bhardlimit);
397	printf("block soft limit:     %ju\n",
398	    (uintmax_t)qup->dqblk.dqb_bsoftlimit);
399	printf("current block count:  %ju\n",
400	    (uintmax_t)qup->dqblk.dqb_curblocks);
401	printf("i-node hard limit:    %ju\n",
402	    (uintmax_t)qup->dqblk.dqb_ihardlimit);
403	printf("i-node soft limit:    %ju\n",
404	    (uintmax_t)qup->dqblk.dqb_isoftlimit);
405	printf("current i-node count: %ju\n",
406	    (uintmax_t)qup->dqblk.dqb_curinodes);
407	printf("block grace time:     %jd",
408	    (intmax_t)qup->dqblk.dqb_btime);
409	if (qup->dqblk.dqb_btime != 0) {
410		t = qup->dqblk.dqb_btime;
411		printf(" %s", ctime(&t));
412	} else {
413		printf("\n");
414	}
415	printf("i-node grace time:    %jd", (intmax_t)qup->dqblk.dqb_itime);
416	if (qup->dqblk.dqb_itime != 0) {
417		t = qup->dqblk.dqb_itime;
418		printf(" %s", ctime(&t));
419	} else {
420		printf("\n");
421	}
422}
423
424
425static void
426heading(int type, u_long id, const char *name, const char *tag)
427{
428
429	printf("Disk quotas for %s %s (%cid %lu): %s\n", qfextension[type],
430	    name, *qfextension[type], id, tag);
431	if (!qflag && tag[0] == '\0') {
432		printf("%-15s %7s %8s %7s %7s %6s %7s %6s%8s\n"
433			, "Filesystem"
434			, "usage"
435			, "quota"
436			, "limit"
437			, "grace"
438			, "files"
439			, "quota"
440			, "limit"
441			, "grace"
442		);
443	}
444}
445
446/*
447 * Calculate the grace period and return a printable string for it.
448 */
449static char *
450timeprt(int64_t seconds)
451{
452	time_t hours, minutes;
453	char *buf;
454	static time_t now;
455
456	if (now == 0)
457		time(&now);
458	if (now > seconds) {
459		if ((buf = strdup("none")) == NULL)
460			errx(1, "strdup() failed in timeprt()");
461		return (buf);
462	}
463	seconds -= now;
464	minutes = (seconds + 30) / 60;
465	hours = (minutes + 30) / 60;
466	if (hours >= 36) {
467		if (asprintf(&buf, "%lddays", ((long)hours + 12) / 24) < 0)
468			errx(1, "asprintf() failed in timeprt(1)");
469		return (buf);
470	}
471	if (minutes >= 60) {
472		if (asprintf(&buf, "%2ld:%ld", (long)minutes / 60,
473		    (long)minutes % 60) < 0)
474			errx(1, "asprintf() failed in timeprt(2)");
475		return (buf);
476	}
477	if (asprintf(&buf, "%2ld", (long)minutes) < 0)
478		errx(1, "asprintf() failed in timeprt(3)");
479	return (buf);
480}
481
482/*
483 * Collect the requested quota information.
484 */
485static struct quotause *
486getprivs(long id, int quotatype)
487{
488	struct quotause *qup, *quptail = NULL;
489	struct fstab *fs;
490	struct quotause *quphead;
491	struct statfs *fst;
492	int nfst, i;
493	struct statfs sfb;
494
495	qup = quphead = (struct quotause *)0;
496
497	if (filename != NULL && statfs(filename, &sfb) != 0)
498		err(1, "cannot statfs %s", filename);
499	nfst = getmntinfo(&fst, MNT_NOWAIT);
500	if (nfst == 0)
501		errx(2, "no filesystems mounted!");
502	setfsent();
503	for (i = 0; i < nfst; i++) {
504		if (qup == NULL) {
505			if ((qup = (struct quotause *)malloc(sizeof *qup))
506			    == NULL)
507				errx(2, "out of memory");
508		}
509		/*
510		 * See if the user requested a specific file system
511		 * or specified a file inside a mounted file system.
512		 */
513		if (filename != NULL &&
514		    strcmp(sfb.f_mntonname, fst[i].f_mntonname) != 0)
515			continue;
516		if (strcmp(fst[i].f_fstypename, "nfs") == 0) {
517			if (lflag)
518				continue;
519			if (getnfsquota(&fst[i], qup, id, quotatype) == 0)
520				continue;
521		} else if (strcmp(fst[i].f_fstypename, "ufs") == 0) {
522			/*
523			 * XXX
524			 * UFS filesystems must be in /etc/fstab, and must
525			 * indicate that they have quotas on (?!) This is quite
526			 * unlike SunOS where quotas can be enabled/disabled
527			 * on a filesystem independent of /etc/fstab, and it
528			 * will still print quotas for them.
529			 */
530			if ((fs = getfsspec(fst[i].f_mntfromname)) == NULL)
531				continue;
532			if (getufsquota(fs, qup, id, quotatype) == 0)
533				continue;
534		} else
535			continue;
536		strcpy(qup->fsname, fst[i].f_mntonname);
537		if (quphead == NULL)
538			quphead = qup;
539		else
540			quptail->next = qup;
541		quptail = qup;
542		quptail->next = 0;
543		qup = NULL;
544	}
545	if (qup)
546		free(qup);
547	endfsent();
548	return (quphead);
549}
550
551/*
552 * Check to see if a particular quota is available.
553 */
554static int
555getufsquota(struct fstab *fs, struct quotause *qup, long id, int quotatype)
556{
557	struct quotafile *qf;
558
559	if ((qf = quota_open(fs, quotatype, O_RDONLY)) == NULL)
560		return (0);
561	if (quota_read(qf, &qup->dqblk, id) != 0)
562		return (0);
563	quota_close(qf);
564	return (1);
565}
566
567static int
568getnfsquota(struct statfs *fst, struct quotause *qup, long id, int quotatype)
569{
570	struct getquota_args gq_args;
571	struct getquota_rslt gq_rslt;
572	struct dqblk *dqp = &qup->dqblk;
573	struct timeval tv;
574	char *cp;
575
576	if (fst->f_flags & MNT_LOCAL)
577		return (0);
578
579	/*
580	 * rpc.rquotad does not support group quotas
581	 */
582	if (quotatype != USRQUOTA)
583		return (0);
584
585	/*
586	 * must be some form of "hostname:/path"
587	 */
588	cp = strchr(fst->f_mntfromname, ':');
589	if (cp == NULL) {
590		warnx("cannot find hostname for %s", fst->f_mntfromname);
591		return (0);
592	}
593
594	*cp = '\0';
595	if (*(cp+1) != '/') {
596		*cp = ':';
597		return (0);
598	}
599
600	/* Avoid attempting the RPC for special amd(8) filesystems. */
601	if (strncmp(fst->f_mntfromname, "pid", 3) == 0 &&
602	    strchr(fst->f_mntfromname, '@') != NULL) {
603		*cp = ':';
604		return (0);
605	}
606
607	gq_args.gqa_pathp = cp + 1;
608	gq_args.gqa_uid = id;
609	if (callaurpc(fst->f_mntfromname, RQUOTAPROG, RQUOTAVERS,
610	    RQUOTAPROC_GETQUOTA, (xdrproc_t)xdr_getquota_args, (char *)&gq_args,
611	    (xdrproc_t)xdr_getquota_rslt, (char *)&gq_rslt) != 0) {
612		*cp = ':';
613		return (0);
614	}
615
616	switch (gq_rslt.status) {
617	case Q_NOQUOTA:
618		break;
619	case Q_EPERM:
620		warnx("quota permission error, host: %s",
621			fst->f_mntfromname);
622		break;
623	case Q_OK:
624		gettimeofday(&tv, NULL);
625			/* blocks*/
626		dqp->dqb_bhardlimit =
627		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit *
628		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
629		dqp->dqb_bsoftlimit =
630		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit *
631		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
632		dqp->dqb_curblocks =
633		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks *
634		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
635			/* inodes */
636		dqp->dqb_ihardlimit =
637			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit;
638		dqp->dqb_isoftlimit =
639			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit;
640		dqp->dqb_curinodes =
641			gq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles;
642			/* grace times */
643		dqp->dqb_btime =
644		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft;
645		dqp->dqb_itime =
646		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft;
647		*cp = ':';
648		return (1);
649	default:
650		warnx("bad rpc result, host: %s", fst->f_mntfromname);
651		break;
652	}
653	*cp = ':';
654	return (0);
655}
656
657static int
658callaurpc(char *host, int prognum, int versnum, int procnum,
659    xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
660{
661	struct sockaddr_in server_addr;
662	enum clnt_stat clnt_stat;
663	struct hostent *hp;
664	struct timeval timeout, tottimeout;
665
666	CLIENT *client = NULL;
667	int sock = RPC_ANYSOCK;
668
669	if ((hp = gethostbyname(host)) == NULL)
670		return ((int) RPC_UNKNOWNHOST);
671	timeout.tv_usec = 0;
672	timeout.tv_sec = 6;
673	bcopy(hp->h_addr, &server_addr.sin_addr,
674			MIN(hp->h_length,(int)sizeof(server_addr.sin_addr)));
675	server_addr.sin_family = AF_INET;
676	server_addr.sin_port =  0;
677
678	if ((client = clntudp_create(&server_addr, prognum,
679	    versnum, timeout, &sock)) == NULL)
680		return ((int) rpc_createerr.cf_stat);
681
682	client->cl_auth = authunix_create_default();
683	tottimeout.tv_sec = 25;
684	tottimeout.tv_usec = 0;
685	clnt_stat = clnt_call(client, procnum, inproc, in,
686	    outproc, out, tottimeout);
687
688	return ((int) clnt_stat);
689}
690
691static int
692alldigits(char *s)
693{
694	int c;
695
696	c = *s++;
697	do {
698		if (!isdigit(c))
699			return (0);
700	} while ((c = *s++));
701	return (1);
702}
703