quota.c revision 133258 
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 133258 2004-08-07 07:05:38Z stefanf $");
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 void showusrname(char *name);
94static void showgrpname(char *name);
95static void showquotas(int type, u_long id, const char *name);
96static void heading(int type, u_long id, const char *name, const char *tag);
97static int ufshasquota(struct fstab *fs, int type, char **qfnamep);
98static int getufsquota(struct fstab *fs, struct quotause *qup, long id,
99	int quotatype);
100static int getnfsquota(struct statfs *fst, struct quotause *qup, long id,
101	int quotatype);
102static int callaurpc(char *host, int prognum, int versnum, int procnum,
103	xdrproc_t inproc, char *in, xdrproc_t outproc, char *out);
104static int alldigits(char *s);
105
106int	lflag;
107int	qflag;
108int	vflag;
109
110int
111main(int argc, char *argv[])
112{
113	int ngroups;
114	gid_t mygid, gidset[NGROUPS];
115	int i, ch, gflag = 0, uflag = 0;
116
117	while ((ch = getopt(argc, argv, "glquv")) != -1) {
118		switch(ch) {
119		case 'g':
120			gflag++;
121			break;
122		case 'l':
123			lflag++;
124			break;
125		case 'q':
126			qflag++;
127			break;
128		case 'u':
129			uflag++;
130			break;
131		case 'v':
132			vflag++;
133			break;
134		default:
135			usage();
136		}
137	}
138	argc -= optind;
139	argv += optind;
140	if (!uflag && !gflag)
141		uflag++;
142	if (argc == 0) {
143		if (uflag)
144			showuid(getuid());
145		if (gflag) {
146			mygid = getgid();
147			ngroups = getgroups(NGROUPS, gidset);
148			if (ngroups < 0)
149				err(1, "getgroups");
150			showgid(mygid);
151			for (i = 0; i < ngroups; i++)
152				if (gidset[i] != mygid)
153					showgid(gidset[i]);
154		}
155		return(0);
156	}
157	if (uflag && gflag)
158		usage();
159	if (uflag) {
160		for (; argc > 0; argc--, argv++) {
161			if (alldigits(*argv))
162				showuid(atoi(*argv));
163			else
164				showusrname(*argv);
165		}
166		return(0);
167	}
168	if (gflag) {
169		for (; argc > 0; argc--, argv++) {
170			if (alldigits(*argv))
171				showgid(atoi(*argv));
172			else
173				showgrpname(*argv);
174		}
175	}
176	return(0);
177}
178
179static void
180usage(void)
181{
182
183	fprintf(stderr, "%s\n%s\n%s\n",
184	    "usage: quota [-glu] [-v | -q]",
185	    "       quota [-lu] [-v | -q] user ...",
186	    "       quota -g [-l] [-v | -q] group ...");
187	exit(1);
188}
189
190/*
191 * Print out quotas for a specified user identifier.
192 */
193static void
194showuid(u_long uid)
195{
196	struct passwd *pwd = getpwuid(uid);
197	const char *name;
198
199	if (pwd == NULL)
200		name = "(no account)";
201	else
202		name = pwd->pw_name;
203	showquotas(USRQUOTA, uid, name);
204}
205
206/*
207 * Print out quotas for a specifed user name.
208 */
209static void
210showusrname(char *name)
211{
212	struct passwd *pwd = getpwnam(name);
213
214	if (pwd == NULL) {
215		warnx("%s: unknown user", name);
216		return;
217	}
218	showquotas(USRQUOTA, pwd->pw_uid, name);
219}
220
221/*
222 * Print out quotas for a specified group identifier.
223 */
224static void
225showgid(u_long gid)
226{
227	struct group *grp = getgrgid(gid);
228	const char *name;
229
230	if (grp == NULL)
231		name = "(no entry)";
232	else
233		name = grp->gr_name;
234	showquotas(GRPQUOTA, gid, name);
235}
236
237/*
238 * Print out quotas for a specifed group name.
239 */
240static void
241showgrpname(char *name)
242{
243	struct group *grp = getgrnam(name);
244
245	if (grp == NULL) {
246		warnx("%s: unknown group", name);
247		return;
248	}
249	showquotas(GRPQUOTA, grp->gr_gid, name);
250}
251
252static void
253showquotas(int type, u_long id, const char *name)
254{
255	struct quotause *qup;
256	struct quotause *quplist;
257	const char *msgi, *msgb;
258	const char *nam;
259	int lines = 0;
260	static time_t now;
261
262	if (now == 0)
263		time(&now);
264	quplist = getprivs(id, type);
265	for (qup = quplist; qup; qup = qup->next) {
266		if (!vflag &&
267		    qup->dqblk.dqb_isoftlimit == 0 &&
268		    qup->dqblk.dqb_ihardlimit == 0 &&
269		    qup->dqblk.dqb_bsoftlimit == 0 &&
270		    qup->dqblk.dqb_bhardlimit == 0)
271			continue;
272		msgi = (char *)0;
273		if (qup->dqblk.dqb_ihardlimit &&
274		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_ihardlimit)
275			msgi = "File limit reached on";
276		else if (qup->dqblk.dqb_isoftlimit &&
277		    qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_isoftlimit) {
278			if (qup->dqblk.dqb_itime > now)
279				msgi = "In file grace period on";
280			else
281				msgi = "Over file quota on";
282		}
283		msgb = (char *)0;
284		if (qup->dqblk.dqb_bhardlimit &&
285		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bhardlimit)
286			msgb = "Block limit reached on";
287		else if (qup->dqblk.dqb_bsoftlimit &&
288		    qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bsoftlimit) {
289			if (qup->dqblk.dqb_btime > now)
290				msgb = "In block grace period on";
291			else
292				msgb = "Over block quota on";
293		}
294		if (qflag) {
295			if ((msgi != (char *)0 || msgb != (char *)0) &&
296			    lines++ == 0)
297				heading(type, id, name, "");
298			if (msgi != (char *)0)
299				printf("\t%s %s\n", msgi, qup->fsname);
300			if (msgb != (char *)0)
301				printf("\t%s %s\n", msgb, qup->fsname);
302			continue;
303		}
304		if (vflag ||
305		    qup->dqblk.dqb_curblocks ||
306		    qup->dqblk.dqb_curinodes) {
307			if (lines++ == 0)
308				heading(type, id, name, "");
309			nam = qup->fsname;
310			if (strlen(qup->fsname) > 15) {
311				printf("%s\n", qup->fsname);
312				nam = "";
313			}
314			printf("%15s%8lu%c%7lu%8lu%8s"
315				, nam
316				, (u_long) (dbtob(qup->dqblk.dqb_curblocks)
317					    / 1024)
318				, (msgb == (char *)0) ? ' ' : '*'
319				, (u_long) (dbtob(qup->dqblk.dqb_bsoftlimit)
320					    / 1024)
321				, (u_long) (dbtob(qup->dqblk.dqb_bhardlimit)
322					    / 1024)
323				, (msgb == (char *)0) ? ""
324				    :timeprt(qup->dqblk.dqb_btime));
325			printf("%8lu%c%7lu%8lu%8s\n"
326				, (u_long)qup->dqblk.dqb_curinodes
327				, (msgi == (char *)0) ? ' ' : '*'
328				, (u_long)qup->dqblk.dqb_isoftlimit
329				, (u_long)qup->dqblk.dqb_ihardlimit
330				, (msgi == (char *)0) ? ""
331				    : timeprt(qup->dqblk.dqb_itime)
332			);
333			continue;
334		}
335	}
336	if (!qflag && lines == 0)
337		heading(type, id, name, "none");
338}
339
340static void
341heading(int type, u_long id, const char *name, const char *tag)
342{
343
344	printf("Disk quotas for %s %s (%cid %lu): %s\n", qfextension[type],
345	    name, *qfextension[type], id, tag);
346	if (!qflag && tag[0] == '\0') {
347		printf("%15s%8s %7s%8s%8s%8s %7s%8s%8s\n"
348			, "Filesystem"
349			, "usage"
350			, "quota"
351			, "limit"
352			, "grace"
353			, "files"
354			, "quota"
355			, "limit"
356			, "grace"
357		);
358	}
359}
360
361/*
362 * Calculate the grace period and return a printable string for it.
363 */
364static const char *
365timeprt(time_t seconds)
366{
367	time_t hours, minutes;
368	static char buf[20];
369	static time_t now;
370
371	if (now == 0)
372		time(&now);
373	if (now > seconds)
374		return ("none");
375	seconds -= now;
376	minutes = (seconds + 30) / 60;
377	hours = (minutes + 30) / 60;
378	if (hours >= 36) {
379		sprintf(buf, "%lddays", ((long)hours + 12) / 24);
380		return (buf);
381	}
382	if (minutes >= 60) {
383		sprintf(buf, "%2ld:%ld", (long)minutes / 60,
384		    (long)minutes % 60);
385		return (buf);
386	}
387	sprintf(buf, "%2ld", (long)minutes);
388	return (buf);
389}
390
391/*
392 * Collect the requested quota information.
393 */
394static struct quotause *
395getprivs(long id, int quotatype)
396{
397	struct quotause *qup, *quptail = NULL;
398	struct fstab *fs;
399	struct quotause *quphead;
400	struct statfs *fst;
401	int nfst, i;
402
403	qup = quphead = (struct quotause *)0;
404
405	nfst = getmntinfo(&fst, MNT_NOWAIT);
406	if (nfst == 0)
407		errx(2, "no filesystems mounted!");
408	setfsent();
409	for (i=0; i<nfst; i++) {
410		if (qup == NULL) {
411			if ((qup = (struct quotause *)malloc(sizeof *qup))
412			    == NULL)
413				errx(2, "out of memory");
414		}
415		if (strcmp(fst[i].f_fstypename, "nfs") == 0) {
416			if (lflag)
417				continue;
418			if (getnfsquota(&fst[i], qup, id, quotatype)
419			    == 0)
420				continue;
421		} else if (strcmp(fst[i].f_fstypename, "ufs") == 0) {
422			/*
423			 * XXX
424			 * UFS filesystems must be in /etc/fstab, and must
425			 * indicate that they have quotas on (?!) This is quite
426			 * unlike SunOS where quotas can be enabled/disabled
427			 * on a filesystem independent of /etc/fstab, and it
428			 * will still print quotas for them.
429			 */
430			if ((fs = getfsspec(fst[i].f_mntfromname)) == NULL)
431				continue;
432			if (getufsquota(fs, qup, id, quotatype) == 0)
433				continue;
434		} else
435			continue;
436		strcpy(qup->fsname, fst[i].f_mntonname);
437		if (quphead == NULL)
438			quphead = qup;
439		else
440			quptail->next = qup;
441		quptail = qup;
442		quptail->next = 0;
443		qup = NULL;
444	}
445	if (qup)
446		free(qup);
447	endfsent();
448	return (quphead);
449}
450
451/*
452 * Check to see if a particular quota is to be enabled.
453 */
454static int
455ufshasquota(struct fstab *fs, int type, char **qfnamep)
456{
457	static char initname, usrname[100], grpname[100];
458	static char buf[BUFSIZ];
459	char *opt, *cp;
460
461	if (!initname) {
462		sprintf(usrname, "%s%s", qfextension[USRQUOTA], qfname);
463		sprintf(grpname, "%s%s", qfextension[GRPQUOTA], qfname);
464		initname = 1;
465	}
466	strcpy(buf, fs->fs_mntops);
467	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
468		if ((cp = index(opt, '=')))
469			*cp++ = '\0';
470		if (type == USRQUOTA && strcmp(opt, usrname) == 0)
471			break;
472		if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
473			break;
474	}
475	if (!opt)
476		return (0);
477	if (cp) {
478		*qfnamep = cp;
479		return (1);
480	}
481	(void) sprintf(buf, "%s/%s.%s", fs->fs_file, qfname, qfextension[type]);
482	*qfnamep = buf;
483	return (1);
484}
485
486static int
487getufsquota(struct fstab *fs, struct quotause *qup, long id, int quotatype)
488{
489	char *qfpathname;
490	int fd, qcmd;
491
492	qcmd = QCMD(Q_GETQUOTA, quotatype);
493	if (!ufshasquota(fs, quotatype, &qfpathname))
494		return (0);
495
496	if (quotactl(fs->fs_file, qcmd, id, (char *)&qup->dqblk) != 0) {
497		if ((fd = open(qfpathname, O_RDONLY)) < 0) {
498			warn("%s", qfpathname);
499			return (0);
500		}
501		(void) lseek(fd, (off_t)(id * sizeof(struct dqblk)), L_SET);
502		switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
503		case 0:				/* EOF */
504			/*
505			 * Convert implicit 0 quota (EOF)
506			 * into an explicit one (zero'ed dqblk)
507			 */
508			bzero((caddr_t)&qup->dqblk, sizeof(struct dqblk));
509			break;
510		case sizeof(struct dqblk):	/* OK */
511			break;
512		default:		/* ERROR */
513			warn("read error: %s", qfpathname);
514			close(fd);
515			return (0);
516		}
517		close(fd);
518	}
519	return (1);
520}
521
522static int
523getnfsquota(struct statfs *fst, struct quotause *qup, long id, int quotatype)
524{
525	struct getquota_args gq_args;
526	struct getquota_rslt gq_rslt;
527	struct dqblk *dqp = &qup->dqblk;
528	struct timeval tv;
529	char *cp;
530
531	if (fst->f_flags & MNT_LOCAL)
532		return (0);
533
534	/*
535	 * rpc.rquotad does not support group quotas
536	 */
537	if (quotatype != USRQUOTA)
538		return (0);
539
540	/*
541	 * must be some form of "hostname:/path"
542	 */
543	cp = strchr(fst->f_mntfromname, ':');
544	if (cp == NULL) {
545		warnx("cannot find hostname for %s", fst->f_mntfromname);
546		return (0);
547	}
548
549	*cp = '\0';
550	if (*(cp+1) != '/') {
551		*cp = ':';
552		return (0);
553	}
554
555	/* Avoid attempting the RPC for special amd(8) filesystems. */
556	if (strncmp(fst->f_mntfromname, "pid", 3) == 0 &&
557	    strchr(fst->f_mntfromname, '@') != NULL) {
558		*cp = ':';
559		return (0);
560	}
561
562	gq_args.gqa_pathp = cp + 1;
563	gq_args.gqa_uid = id;
564	if (callaurpc(fst->f_mntfromname, RQUOTAPROG, RQUOTAVERS,
565	    RQUOTAPROC_GETQUOTA, (xdrproc_t)xdr_getquota_args, (char *)&gq_args,
566	    (xdrproc_t)xdr_getquota_rslt, (char *)&gq_rslt) != 0) {
567		*cp = ':';
568		return (0);
569	}
570
571	switch (gq_rslt.status) {
572	case Q_NOQUOTA:
573		break;
574	case Q_EPERM:
575		warnx("quota permission error, host: %s",
576			fst->f_mntfromname);
577		break;
578	case Q_OK:
579		gettimeofday(&tv, NULL);
580			/* blocks*/
581		dqp->dqb_bhardlimit =
582		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit *
583		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
584		dqp->dqb_bsoftlimit =
585		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit *
586		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
587		dqp->dqb_curblocks =
588		    gq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks *
589		    (gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
590			/* inodes */
591		dqp->dqb_ihardlimit =
592			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit;
593		dqp->dqb_isoftlimit =
594			gq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit;
595		dqp->dqb_curinodes =
596			gq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles;
597			/* grace times */
598		dqp->dqb_btime =
599		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft;
600		dqp->dqb_itime =
601		    tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft;
602		*cp = ':';
603		return (1);
604	default:
605		warnx("bad rpc result, host: %s", fst->f_mntfromname);
606		break;
607	}
608	*cp = ':';
609	return (0);
610}
611
612static int
613callaurpc(char *host, int prognum, int versnum, int procnum,
614    xdrproc_t inproc, char *in, xdrproc_t outproc, char *out)
615{
616	struct sockaddr_in server_addr;
617	enum clnt_stat clnt_stat;
618	struct hostent *hp;
619	struct timeval timeout, tottimeout;
620
621	CLIENT *client = NULL;
622	int sock = RPC_ANYSOCK;
623
624	if ((hp = gethostbyname(host)) == NULL)
625		return ((int) RPC_UNKNOWNHOST);
626	timeout.tv_usec = 0;
627	timeout.tv_sec = 6;
628	bcopy(hp->h_addr, &server_addr.sin_addr,
629			MIN(hp->h_length,(int)sizeof(server_addr.sin_addr)));
630	server_addr.sin_family = AF_INET;
631	server_addr.sin_port =  0;
632
633	if ((client = clntudp_create(&server_addr, prognum,
634	    versnum, timeout, &sock)) == NULL)
635		return ((int) rpc_createerr.cf_stat);
636
637	client->cl_auth = authunix_create_default();
638	tottimeout.tv_sec = 25;
639	tottimeout.tv_usec = 0;
640	clnt_stat = clnt_call(client, procnum, inproc, in,
641	    outproc, out, tottimeout);
642
643	return ((int) clnt_stat);
644}
645
646static int
647alldigits(char *s)
648{
649	int c;
650
651	c = *s++;
652	do {
653		if (!isdigit(c))
654			return (0);
655	} while ((c = *s++));
656	return (1);
657}
658