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quota.c revision 1.40 
      1 /*	$NetBSD: quota.c,v 1.40 2011/11/27 13:24:32 dholland Exp $	*/
      2 
      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 #include <sys/cdefs.h>
     36 #ifndef lint
     37 __COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\
     38  The Regents of the University of California.  All rights reserved.");
     39 #endif /* not lint */
     40 
     41 #ifndef lint
     42 #if 0
     43 static char sccsid[] = "@(#)quota.c	8.4 (Berkeley) 4/28/95";
     44 #else
     45 __RCSID("$NetBSD: quota.c,v 1.40 2011/11/27 13:24:32 dholland Exp $");
     46 #endif
     47 #endif /* not lint */
     48 
     49 /*
     50  * Disk quota reporting program.
     51  */
     52 #include <sys/param.h>
     53 #include <sys/types.h>
     54 #include <sys/file.h>
     55 #include <sys/stat.h>
     56 #include <sys/mount.h>
     57 #include <sys/socket.h>
     58 
     59 #include <ctype.h>
     60 #include <err.h>
     61 #include <errno.h>
     62 #include <fstab.h>
     63 #include <grp.h>
     64 #include <netdb.h>
     65 #include <pwd.h>
     66 #include <stdio.h>
     67 #include <stdlib.h>
     68 #include <string.h>
     69 #include <time.h>
     70 #include <unistd.h>
     71 
     72 #include <quota/quotaprop.h>
     73 #include <quota/quota.h>
     74 
     75 #include "printquota.h"
     76 #include "getvfsquota.h"
     77 
     78 struct quotause {
     79 	struct	quotause *next;
     80 	long	flags;
     81 	uid_t	id;
     82 	struct	quotaval qv[QUOTA_NLIMITS];
     83 	char	fsname[MAXPATHLEN + 1];
     84 };
     85 #define	FOUND	0x01
     86 #define	QUOTA2	0x02
     87 
     88 static struct quotause	*getprivs(id_t, int);
     89 static void	heading(int, id_t, const char *, const char *);
     90 static void	showgid(gid_t);
     91 static void	showgrpname(const char *);
     92 static void	showquotas(int, id_t, const char *);
     93 static void	showuid(uid_t);
     94 static void	showusrname(const char *);
     95 static void	usage(void) __dead;
     96 
     97 static int	qflag = 0;
     98 static int	vflag = 0;
     99 static int	hflag = 0;
    100 static int	dflag = 0;
    101 static int	Dflag = 0;
    102 static uid_t	myuid;
    103 
    104 int
    105 main(int argc, char *argv[])
    106 {
    107 	int ngroups;
    108 	gid_t mygid, gidset[NGROUPS];
    109 	int i, gflag = 0, uflag = 0;
    110 	int ch;
    111 
    112 	myuid = getuid();
    113 	while ((ch = getopt(argc, argv, "Ddhugvq")) != -1) {
    114 		switch(ch) {
    115 		case 'g':
    116 			gflag++;
    117 			break;
    118 		case 'u':
    119 			uflag++;
    120 			break;
    121 		case 'v':
    122 			vflag++;
    123 			break;
    124 		case 'q':
    125 			qflag++;
    126 			break;
    127 		case 'h':
    128 			hflag++;
    129 			break;
    130 		case 'd':
    131 			dflag++;
    132 			break;
    133 		case 'D':
    134 			Dflag++;
    135 			break;
    136 		default:
    137 			usage();
    138 		}
    139 	}
    140 	argc -= optind;
    141 	argv += optind;
    142 	if (!uflag && !gflag)
    143 		uflag++;
    144 	if (dflag) {
    145 #if 0
    146 		if (myuid != 0)
    147 			errx(1, "-d: permission denied");
    148 #endif
    149 		if (uflag)
    150 			showquotas(QUOTA_CLASS_USER, 0, "");
    151 		if (gflag)
    152 			showquotas(QUOTA_CLASS_GROUP, 0, "");
    153 		return 0;
    154 	}
    155 	if (argc == 0) {
    156 		if (uflag)
    157 			showuid(myuid);
    158 		if (gflag) {
    159 			if (dflag)
    160 				showgid(0);
    161 			else {
    162 				mygid = getgid();
    163 				ngroups = getgroups(NGROUPS, gidset);
    164 				if (ngroups < 0)
    165 					err(1, "getgroups");
    166 				showgid(mygid);
    167 				for (i = 0; i < ngroups; i++)
    168 					if (gidset[i] != mygid)
    169 						showgid(gidset[i]);
    170 			}
    171 		}
    172 		return 0;
    173 	}
    174 	if (uflag && gflag)
    175 		usage();
    176 	if (uflag) {
    177 		for (; argc > 0; argc--, argv++) {
    178 			if (alldigits(*argv))
    179 				showuid((uid_t)atoi(*argv));
    180 			else
    181 				showusrname(*argv);
    182 		}
    183 		return 0;
    184 	}
    185 	if (gflag) {
    186 		for (; argc > 0; argc--, argv++) {
    187 			if (alldigits(*argv))
    188 				showgid((gid_t)atoi(*argv));
    189 			else
    190 				showgrpname(*argv);
    191 		}
    192 		return 0;
    193 	}
    194 	/* NOTREACHED */
    195 	return 0;
    196 }
    197 
    198 static void
    199 usage(void)
    200 {
    201 	const char *p = getprogname();
    202 	fprintf(stderr, "Usage: %s [-Dhguqv]\n"
    203 	    "\t%s [-Dhqv] -u username ...\n"
    204 	    "\t%s [-Dhqv] -g groupname ...\n"
    205 	    "\t%s -d [-Dhguqv]\n", p, p, p, p);
    206 	exit(1);
    207 }
    208 
    209 /*
    210  * Print out quotas for a specified user identifier.
    211  */
    212 static void
    213 showuid(uid_t uid)
    214 {
    215 	struct passwd *pwd = getpwuid(uid);
    216 	const char *name;
    217 
    218 	if (pwd == NULL)
    219 		name = "(no account)";
    220 	else
    221 		name = pwd->pw_name;
    222 	if (uid != myuid && myuid != 0) {
    223 		warnx("%s (uid %d): permission denied", name, uid);
    224 		return;
    225 	}
    226 	showquotas(QUOTA_CLASS_USER, uid, name);
    227 }
    228 
    229 /*
    230  * Print out quotas for a specified user name.
    231  */
    232 static void
    233 showusrname(const char *name)
    234 {
    235 	struct passwd *pwd = getpwnam(name);
    236 
    237 	if (pwd == NULL) {
    238 		warnx("%s: unknown user", name);
    239 		return;
    240 	}
    241 	if (pwd->pw_uid != myuid && myuid != 0) {
    242 		warnx("%s (uid %d): permission denied", name, pwd->pw_uid);
    243 		return;
    244 	}
    245 	showquotas(QUOTA_CLASS_USER, pwd->pw_uid, name);
    246 }
    247 
    248 /*
    249  * Print out quotas for a specified group identifier.
    250  */
    251 static void
    252 showgid(gid_t gid)
    253 {
    254 	struct group *grp = getgrgid(gid);
    255 	int ngroups;
    256 	gid_t mygid, gidset[NGROUPS];
    257 	int i;
    258 	const char *name;
    259 
    260 	if (grp == NULL)
    261 		name = "(no entry)";
    262 	else
    263 		name = grp->gr_name;
    264 	mygid = getgid();
    265 	ngroups = getgroups(NGROUPS, gidset);
    266 	if (ngroups < 0) {
    267 		warn("getgroups");
    268 		return;
    269 	}
    270 	if (gid != mygid) {
    271 		for (i = 0; i < ngroups; i++)
    272 			if (gid == gidset[i])
    273 				break;
    274 		if (i >= ngroups && myuid != 0) {
    275 			warnx("%s (gid %d): permission denied", name, gid);
    276 			return;
    277 		}
    278 	}
    279 	showquotas(QUOTA_CLASS_GROUP, gid, name);
    280 }
    281 
    282 /*
    283  * Print out quotas for a specified group name.
    284  */
    285 static void
    286 showgrpname(const char *name)
    287 {
    288 	struct group *grp = getgrnam(name);
    289 	int ngroups;
    290 	gid_t mygid, gidset[NGROUPS];
    291 	int i;
    292 
    293 	if (grp == NULL) {
    294 		warnx("%s: unknown group", name);
    295 		return;
    296 	}
    297 	mygid = getgid();
    298 	ngroups = getgroups(NGROUPS, gidset);
    299 	if (ngroups < 0) {
    300 		warn("getgroups");
    301 		return;
    302 	}
    303 	if (grp->gr_gid != mygid) {
    304 		for (i = 0; i < ngroups; i++)
    305 			if (grp->gr_gid == gidset[i])
    306 				break;
    307 		if (i >= ngroups && myuid != 0) {
    308 			warnx("%s (gid %d): permission denied",
    309 			    name, grp->gr_gid);
    310 			return;
    311 		}
    312 	}
    313 	showquotas(QUOTA_CLASS_GROUP, grp->gr_gid, name);
    314 }
    315 
    316 static void
    317 showquotas(int type, id_t id, const char *name)
    318 {
    319 	struct quotause *qup;
    320 	struct quotause *quplist;
    321 	const char *msgi, *msgb, *nam, *timemsg;
    322 	int lines = 0;
    323 	static time_t now;
    324 	char b0[20], b1[20], b2[20], b3[20];
    325 
    326 	if (now == 0)
    327 		time(&now);
    328 	quplist = getprivs(id, type);
    329 	for (qup = quplist; qup; qup = qup->next) {
    330 		int ql_stat;
    331 		struct quotaval *q = qup->qv;
    332 		if (!vflag &&
    333 		    q[QUOTA_LIMIT_BLOCK].qv_softlimit == UQUAD_MAX &&
    334 		    q[QUOTA_LIMIT_BLOCK].qv_hardlimit == UQUAD_MAX &&
    335 		    q[QUOTA_LIMIT_FILE].qv_softlimit == UQUAD_MAX &&
    336 		    q[QUOTA_LIMIT_FILE].qv_hardlimit == UQUAD_MAX)
    337 			continue;
    338 		ql_stat = quota_check_limit(q[QUOTA_LIMIT_FILE].qv_usage, 1,
    339 		    q[QUOTA_LIMIT_FILE].qv_softlimit,
    340 		    q[QUOTA_LIMIT_FILE].qv_hardlimit,
    341 		    q[QUOTA_LIMIT_FILE].qv_expiretime, now);
    342 		switch(QL_STATUS(ql_stat)) {
    343 		case QL_S_DENY_HARD:
    344 			msgi = "File limit reached on";
    345 			break;
    346 		case QL_S_DENY_GRACE:
    347 			msgi = "Over file quota on";
    348 			break;
    349 		case QL_S_ALLOW_SOFT:
    350 			msgi = "In file grace period on";
    351 			break;
    352 		default:
    353 			msgi = NULL;
    354 		}
    355 		ql_stat = quota_check_limit(q[QUOTA_LIMIT_BLOCK].qv_usage, 1,
    356 		    q[QUOTA_LIMIT_BLOCK].qv_softlimit,
    357 		    q[QUOTA_LIMIT_BLOCK].qv_hardlimit,
    358 		    q[QUOTA_LIMIT_BLOCK].qv_expiretime, now);
    359 		switch(QL_STATUS(ql_stat)) {
    360 		case QL_S_DENY_HARD:
    361 			msgb = "Block limit reached on";
    362 			break;
    363 		case QL_S_DENY_GRACE:
    364 			msgb = "Over block quota on";
    365 			break;
    366 		case QL_S_ALLOW_SOFT:
    367 			msgb = "In block grace period on";
    368 			break;
    369 		default:
    370 			msgb = NULL;
    371 		}
    372 		if (qflag) {
    373 			if ((msgi != NULL || msgb != NULL) &&
    374 			    lines++ == 0)
    375 				heading(type, id, name, "");
    376 			if (msgi != NULL)
    377 				printf("\t%s %s\n", msgi, qup->fsname);
    378 			if (msgb != NULL)
    379 				printf("\t%s %s\n", msgb, qup->fsname);
    380 			continue;
    381 		}
    382 		if (vflag || dflag || msgi || msgb ||
    383 		    q[QUOTA_LIMIT_BLOCK].qv_usage ||
    384 		    q[QUOTA_LIMIT_FILE].qv_usage) {
    385 			if (lines++ == 0)
    386 				heading(type, id, name, "");
    387 			nam = qup->fsname;
    388 			if (strlen(qup->fsname) > 4) {
    389 				printf("%s\n", qup->fsname);
    390 				nam = "";
    391 			}
    392 			if (msgb)
    393 				timemsg = timeprt(b0, 9, now,
    394 				    q[QUOTA_LIMIT_BLOCK].qv_expiretime);
    395 			else if ((qup->flags & QUOTA2) != 0 && vflag)
    396 				timemsg = timeprt(b0, 9, 0,
    397 				    q[QUOTA_LIMIT_BLOCK].qv_grace);
    398 			else
    399 				timemsg = "";
    400 
    401 			printf("%12s%9s%c%8s%9s%8s",
    402 			    nam,
    403 			    intprt(b1, 9, q[QUOTA_LIMIT_BLOCK].qv_usage,
    404 			    HN_B, hflag),
    405 			    (msgb == NULL) ? ' ' : '*',
    406 			    intprt(b2, 9, q[QUOTA_LIMIT_BLOCK].qv_softlimit,
    407 			    HN_B, hflag),
    408 			    intprt(b3, 9, q[QUOTA_LIMIT_BLOCK].qv_hardlimit,
    409 			    HN_B, hflag),
    410 			    timemsg);
    411 
    412 			if (msgi)
    413 				timemsg = timeprt(b0, 9, now,
    414 				    q[QUOTA_LIMIT_FILE].qv_expiretime);
    415 			else if ((qup->flags & QUOTA2) != 0 && vflag)
    416 				timemsg = timeprt(b0, 9, 0,
    417 				    q[QUOTA_LIMIT_FILE].qv_grace);
    418 			else
    419 				timemsg = "";
    420 
    421 			printf("%8s%c%7s%8s%8s\n",
    422 			    intprt(b1, 8, q[QUOTA_LIMIT_FILE].qv_usage, 0,
    423 			     hflag),
    424 			    (msgi == NULL) ? ' ' : '*',
    425 			    intprt(b2, 8, q[QUOTA_LIMIT_FILE].qv_softlimit,
    426 			     0, hflag),
    427 			    intprt(b3, 8, q[QUOTA_LIMIT_FILE].qv_hardlimit,
    428 			     0, hflag),
    429 			    timemsg);
    430 			continue;
    431 		}
    432 	}
    433 	if (!qflag && lines == 0)
    434 		heading(type, id, name, "none");
    435 }
    436 
    437 static void
    438 heading(int type, id_t id, const char *name, const char *tag)
    439 {
    440 	if (dflag)
    441 		printf("Default %s disk quotas: %s\n",
    442 		    ufs_quota_class_names[type], tag);
    443 	else
    444 		printf("Disk quotas for %s %s (%cid %u): %s\n",
    445 		    ufs_quota_class_names[type], name,
    446 		    *ufs_quota_class_names[type], id, tag);
    447 
    448 	if (!qflag && tag[0] == '\0') {
    449 		printf("%12s%9s %8s%9s%8s%8s %7s%8s%8s\n"
    450 		    , "Filesystem"
    451 		    , "blocks"
    452 		    , "quota"
    453 		    , "limit"
    454 		    , "grace"
    455 		    , "files"
    456 		    , "quota"
    457 		    , "limit"
    458 		    , "grace"
    459 		);
    460 	}
    461 }
    462 
    463 /*
    464  * Collect the requested quota information.
    465  */
    466 static struct quotause *
    467 getprivs(id_t id, int quotatype)
    468 {
    469 	struct quotause *qup, *quptail;
    470 	struct quotause *quphead;
    471 	struct statvfs *fst;
    472 	int nfst, i;
    473 	int8_t version;
    474 
    475 	qup = quphead = quptail = NULL;
    476 
    477 	nfst = getmntinfo(&fst, MNT_WAIT);
    478 	if (nfst == 0)
    479 		errx(2, "no filesystems mounted!");
    480 	for (i = 0; i < nfst; i++) {
    481 		if (qup == NULL) {
    482 			if ((qup = malloc(sizeof *qup)) == NULL)
    483 				err(1, "out of memory");
    484 		}
    485 		if (strncmp(fst[i].f_fstypename, "nfs",
    486 		    sizeof(fst[i].f_fstypename)) == 0) {
    487 			version = 0;
    488 			if (getnfsquota(fst[i].f_mntfromname,
    489 			    qup->qv, id, ufs_quota_class_names[quotatype]) != 1)
    490 				continue;
    491 		} else if ((fst[i].f_flag & ST_QUOTA) != 0) {
    492 			if (getvfsquota(fst[i].f_mntonname, qup->qv, &version,
    493 			    id, quotatype, dflag, Dflag) != 1)
    494 				continue;
    495 		} else
    496 			continue;
    497 		(void)strncpy(qup->fsname, fst[i].f_mntonname,
    498 		    sizeof(qup->fsname) - 1);
    499 		if (version == 2)
    500 			qup->flags |= QUOTA2;
    501 		if (quphead == NULL)
    502 			quphead = qup;
    503 		else
    504 			quptail->next = qup;
    505 		quptail = qup;
    506 		quptail->next = 0;
    507 		qup = NULL;
    508 	}
    509 	free(qup);
    510 	return quphead;
    511 }
    512