xref: /src/usr.sbin/edquota/edquota.c

/*      $NetBSD: edquota.c,v 1.48 2012/08/13 22:21:05 dholland Exp $ */
/*
 * Copyright (c) 1980, 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Robert Elz at The University of Melbourne.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\
 The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "from: @(#)edquota.c	8.3 (Berkeley) 4/27/95";
#else
__RCSID("$NetBSD: edquota.c,v 1.48 2012/08/13 22:21:05 dholland Exp $");
#endif
#endif /* not lint */

/*
 * Disk quota editor.
 */
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/wait.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/statvfs.h>

#include <quota.h>

#include <assert.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <pwd.h>
#include <grp.h>
#include <ctype.h>
#include <signal.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>

#include "printquota.h"

#include "pathnames.h"

/*
 * XXX. Ideally we shouldn't compile this in, but it'll take some
 * reworking to avoid it and it'll be ok for now.
 */
#define EDQUOTA_NUMOBJTYPES	2

#if 0
static const char *quotagroup = QUOTAGROUP;
#endif

#define MAX_TMPSTR	(100+MAXPATHLEN)

struct quotause {
	struct	quotause *next;
	unsigned found:1,	/* found after running editor */
		xgrace:1,	/* grace periods are per-id */
		isdefault:1;

	struct	quotaval qv[EDQUOTA_NUMOBJTYPES];
	char	fsname[MAXPATHLEN + 1];
	char	implementation[32];
};

struct quotalist {
	struct quotause *head;
	struct quotause *tail;
	char *idtypename;
};

static void	usage(void) __dead;

static int Hflag = 0;

/* more compact form of constants */
#define QO_BLK QUOTA_OBJTYPE_BLOCKS
#define QO_FL  QUOTA_OBJTYPE_FILES

////////////////////////////////////////////////////////////
// support code

/*
 * This routine converts a name for a particular quota class to
 * an identifier. This routine must agree with the kernel routine
 * getinoquota as to the interpretation of quota classes.
 */
static int
getidbyname(const char *name, int idtype)
{
	struct passwd *pw;
	struct group *gr;

	if (alldigits(name))
		return atoi(name);
	switch (idtype) {
	case QUOTA_IDTYPE_USER:
		if ((pw = getpwnam(name)) != NULL)
			return pw->pw_uid;
		warnx("%s: no such user", name);
		break;
	case QUOTA_IDTYPE_GROUP:
		if ((gr = getgrnam(name)) != NULL)
			return gr->gr_gid;
		warnx("%s: no such group", name);
		break;
	default:
		warnx("%d: unknown quota type", idtype);
		break;
	}
	sleep(1);
	return -1;
}

////////////////////////////////////////////////////////////
// quotause operations

/*
 * Create an empty quotause structure.
 */
static struct quotause *
quotause_create(void)
{
	struct quotause *qup;

	qup = malloc(sizeof(*qup));
	if (qup == NULL) {
		err(1, "malloc");
	}

	qup->next = NULL;
	qup->found = 0;
	qup->xgrace = 0;
	qup->isdefault = 0;
	memset(qup->qv, 0, sizeof(qup->qv));
	qup->fsname[0] = '\0';

	return qup;
}

/*
 * Free a quotause structure.
 */
static void
quotause_destroy(struct quotause *qup)
{
	free(qup);
}

////////////////////////////////////////////////////////////
// quotalist operations

/*
 * Create a quotause list.
 */
static struct quotalist *
quotalist_create(void)
{
	struct quotalist *qlist;

	qlist = malloc(sizeof(*qlist));
	if (qlist == NULL) {
		err(1, "malloc");
	}

	qlist->head = NULL;
	qlist->tail = NULL;
	qlist->idtypename = NULL;

	return qlist;
}

/*
 * Free a list of quotause structures.
 */
static void
quotalist_destroy(struct quotalist *qlist)
{
	struct quotause *qup, *nextqup;

	for (qup = qlist->head; qup; qup = nextqup) {
		nextqup = qup->next;
		quotause_destroy(qup);
	}
	free(qlist->idtypename);
	free(qlist);
}

#if 0
static bool
quotalist_empty(struct quotalist *qlist)
{
	return qlist->head == NULL;
}
#endif

static void
quotalist_append(struct quotalist *qlist, struct quotause *qup)
{
	/* should not already be on a list */
	assert(qup->next == NULL);

	if (qlist->head == NULL) {
		qlist->head = qup;
	} else {
		qlist->tail->next = qup;
	}
	qlist->tail = qup;
}

////////////////////////////////////////////////////////////
// ffs quota v1

#if 0
static void
putprivs1(uint32_t id, int idtype, struct quotause *qup)
{
	struct dqblk dqblk;
	int fd;

	quotavals_to_dqblk(&qup->qv[QUOTA_LIMIT_BLOCK],
			   &qup->qv[QUOTA_LIMIT_FILE],
			   &dqblk);
	assert((qup->flags & DEFAULT) == 0);

	if ((fd = open(qup->qfname, O_WRONLY)) < 0) {
		warnx("open `%s'", qup->qfname);
	} else {
		(void)lseek(fd,
		    (off_t)(id * (long)sizeof (struct dqblk)),
		    SEEK_SET);
		if (write(fd, &dqblk, sizeof (struct dqblk)) !=
		    sizeof (struct dqblk))
			warnx("writing `%s'", qup->qfname);
		close(fd);
	}
}

static struct quotause *
getprivs1(long id, int idtype, const char *filesys)
{
	struct fstab *fs;
	char qfpathname[MAXPATHLEN], xbuf[MAXPATHLEN];
	const char *fsspec;
	struct quotause *qup;
	struct dqblk dqblk;
	int fd;

	setfsent();
	while ((fs = getfsent()) != NULL) {
		if (strcmp(fs->fs_vfstype, "ffs"))
			continue;
		fsspec = getfsspecname(xbuf, sizeof(xbuf), fs->fs_spec);
		if (fsspec == NULL) {
			warn("%s", xbuf);
			continue;
		}
		if (strcmp(fsspec, filesys) == 0 ||
		    strcmp(fs->fs_file, filesys) == 0)
			break;
	}
	if (fs == NULL)
		return NULL;

	if (!hasquota(qfpathname, sizeof(qfpathname), fs,
	    quota_idtype_to_ufs(idtype)))
		return NULL;

	qup = quotause_create();
	strcpy(qup->fsname, fs->fs_file);
	if ((fd = open(qfpathname, O_RDONLY)) < 0) {
		fd = open(qfpathname, O_RDWR|O_CREAT, 0640);
		if (fd < 0 && errno != ENOENT) {
			warnx("open `%s'", qfpathname);
			quotause_destroy(qup);
			return NULL;
		}
		warnx("Creating quota file %s", qfpathname);
		sleep(3);
		(void)fchown(fd, getuid(),
		    getidbyname(quotagroup, QUOTA_CLASS_GROUP));
		(void)fchmod(fd, 0640);
	}
	(void)lseek(fd, (off_t)(id * sizeof(struct dqblk)),
	    SEEK_SET);
	switch (read(fd, &dqblk, sizeof(struct dqblk))) {
	case 0:			/* EOF */
		/*
		 * Convert implicit 0 quota (EOF)
		 * into an explicit one (zero'ed dqblk)
		 */
		memset(&dqblk, 0, sizeof(struct dqblk));
		break;

	case sizeof(struct dqblk):	/* OK */
		break;

	default:		/* ERROR */
		warn("read error in `%s'", qfpathname);
		close(fd);
		quotause_destroy(qup);
		return NULL;
	}
	close(fd);
	qup->qfname = qfpathname;
	endfsent();
	dqblk_to_quotavals(&dqblk,
			   &qup->qv[QUOTA_LIMIT_BLOCK],
			   &qup->qv[QUOTA_LIMIT_FILE]);
	return qup;
}
#endif

////////////////////////////////////////////////////////////
// generic quota interface

static int
dogetprivs2(struct quotahandle *qh, int idtype, id_t id, int defaultq,
	    int objtype, struct quotause *qup)
{
	struct quotakey qk;

	qk.qk_idtype = idtype;
	qk.qk_id = defaultq ? QUOTA_DEFAULTID : id;
	qk.qk_objtype = objtype;
	if (quota_get(qh, &qk, &qup->qv[objtype])) {
		/* no entry, get default entry */
		qk.qk_id = QUOTA_DEFAULTID;
		if (quota_get(qh, &qk, &qup->qv[objtype])) {
			return -1;
		}
	}
	return 0;
}

static struct quotause *
getprivs2(long id, int idtype, const char *filesys, int defaultq,
	  char **idtypename_p)
{
	struct quotause *qup;
	struct quotahandle *qh;
	const char *impl;
	unsigned restrictions;
	const char *idtypename;

	qup = quotause_create();
	strcpy(qup->fsname, filesys);
	if (defaultq)
		qup->isdefault = 1;

	qh = quota_open(filesys);
	if (qh == NULL) {
		quotause_destroy(qup);
		return NULL;
	}

	impl = quota_getimplname(qh);
	if (impl == NULL) {
		impl = "???";
	}
	strlcpy(qup->implementation, impl, sizeof(qup->implementation));

	restrictions = quota_getrestrictions(qh);
	if ((restrictions & QUOTA_RESTRICT_UNIFORMGRACE) == 0) {
		qup->xgrace = 1;
	}

	if (*idtypename_p == NULL) {
		idtypename = quota_idtype_getname(qh, idtype);
		*idtypename_p = strdup(idtypename);
		if (*idtypename_p == NULL) {
			errx(1, "Out of memory");
		}
	}

	if (dogetprivs2(qh, idtype, id, defaultq, QUOTA_OBJTYPE_BLOCKS, qup)) {
		quota_close(qh);
		quotause_destroy(qup);
		return NULL;
	}

	if (dogetprivs2(qh, idtype, id, defaultq, QUOTA_OBJTYPE_FILES, qup)) {
		quota_close(qh);
		quotause_destroy(qup);
		return NULL;
	}

	quota_close(qh);

	return qup;
}

static void
putprivs2(uint32_t id, int idtype, struct quotause *qup)
{
	struct quotahandle *qh;
	struct quotakey qk;
	char idname[32];

	if (qup->isdefault) {
		snprintf(idname, sizeof(idname), "%s default",
			 idtype == QUOTA_IDTYPE_USER ? "user" : "group");
		id = QUOTA_DEFAULTID;
	} else {
		snprintf(idname, sizeof(idname), "%s %u",
			 idtype == QUOTA_IDTYPE_USER ? "uid" : "gid", id);
	}

	qh = quota_open(qup->fsname);
	if (qh == NULL) {
		err(1, "%s: quota_open", qup->fsname);
	}

	qk.qk_idtype = idtype;
	qk.qk_id = id;
	qk.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
	if (quota_put(qh, &qk, &qup->qv[QO_BLK])) {
		err(1, "%s: quota_put (%s blocks)", qup->fsname, idname);
	}

	qk.qk_idtype = idtype;
	qk.qk_id = id;
	qk.qk_objtype = QUOTA_OBJTYPE_FILES;
	if (quota_put(qh, &qk, &qup->qv[QO_FL])) {
		err(1, "%s: quota_put (%s files)", qup->fsname, idname);
	}

	quota_close(qh);
}

////////////////////////////////////////////////////////////
// quota format switch

/*
 * Collect the requested quota information.
 */
static struct quotalist *
getprivs(long id, int defaultq, int idtype, const char *filesys)
{
	struct statvfs *fst;
	int nfst, i;
	struct quotalist *qlist;
	struct quotause *qup;

	qlist = quotalist_create();

	nfst = getmntinfo(&fst, MNT_WAIT);
	if (nfst == 0)
		errx(1, "no filesystems mounted!");

	for (i = 0; i < nfst; i++) {
		if ((fst[i].f_flag & ST_QUOTA) == 0)
			continue;
		if (filesys &&
		    strcmp(fst[i].f_mntonname, filesys) != 0 &&
		    strcmp(fst[i].f_mntfromname, filesys) != 0)
			continue;
		qup = getprivs2(id, idtype, fst[i].f_mntonname, defaultq,
				&qlist->idtypename);
		if (qup == NULL) {
			/*
			 * XXX: returning NULL is totally wrong. On
			 * serious error, abort; on minor error, warn
			 * and continue.
			 *
			 * Note: we cannot warn unconditionally here
			 * because this case apparently includes "no
			 * quota entry on this volume" and that causes
			 * the atf tests to fail. Bletch.
			 */
			/*return NULL;*/
			/*warnx("getprivs2 failed");*/
			continue;
		}

		quotalist_append(qlist, qup);
	}

#if 0
	if (filesys && quotalist_empty(qlist)) {
		if (defaultq)
			errx(1, "no default quota for version 1");
		/* if we get there, filesys is not mounted. try the old way */
		qup = getprivs1(id, idtype, filesys);
		if (qup == NULL) {
			/* XXX. see above */
			/*return NULL;*/
			/*warnx("getprivs1 failed");*/
			return qlist;
		}
		quotalist_append(qlist, qup);
	}
#endif
	return qlist;
}

/*
 * Store the requested quota information.
 */
static void
putprivs(uint32_t id, int idtype, struct quotalist *qlist)
{
	struct quotause *qup;

        for (qup = qlist->head; qup; qup = qup->next) {
#if 0
		if (qup->qfname != NULL)
			putprivs1(id, idtype, qup);
		else
#endif
			putprivs2(id, idtype, qup);
	}
}

static void
clearpriv(int argc, char **argv, const char *filesys, int idtype)
{
	struct statvfs *fst;
	int nfst, i;
	int id;
	id_t *ids;
	unsigned nids, maxids, j;
	struct quotahandle *qh;
	struct quotakey qk;
	char idname[32];

	maxids = 4;
	nids = 0;
	ids = malloc(maxids * sizeof(ids[0]));
	if (ids == NULL) {
		err(1, "malloc");
	}

	for ( ; argc > 0; argc--, argv++) {
		if ((id = getidbyname(*argv, idtype)) == -1)
			continue;

		if (nids + 1 > maxids) {
			maxids *= 2;
			ids = realloc(ids, maxids * sizeof(ids[0]));
			if (ids == NULL) {
				err(1, "realloc");
			}
		}
		ids[nids++] = id;
	}

	/* now loop over quota-enabled filesystems */
	nfst = getmntinfo(&fst, MNT_WAIT);
	if (nfst == 0)
		errx(1, "no filesystems mounted!");

	for (i = 0; i < nfst; i++) {
		if ((fst[i].f_flag & ST_QUOTA) == 0)
			continue;
		if (filesys && strcmp(fst[i].f_mntonname, filesys) != 0 &&
		    strcmp(fst[i].f_mntfromname, filesys) != 0)
			continue;

		qh = quota_open(fst[i].f_mntonname);
		if (qh == NULL) {
			err(1, "%s: quota_open", fst[i].f_mntonname);
		}

		for (j = 0; j < nids; j++) {
			snprintf(idname, sizeof(idname), "%s %u",
				 idtype == QUOTA_IDTYPE_USER ?
				 "uid" : "gid", ids[j]);

			qk.qk_idtype = idtype;
			qk.qk_id = ids[j];
			qk.qk_objtype = QUOTA_OBJTYPE_BLOCKS;
			if (quota_delete(qh, &qk)) {
				err(1, "%s: quota_delete (%s blocks)",
				    fst[i].f_mntonname, idname);
			}

			qk.qk_idtype = idtype;
			qk.qk_id = ids[j];
			qk.qk_objtype = QUOTA_OBJTYPE_FILES;
			if (quota_delete(qh, &qk)) {
				if (errno == ENOENT) {
 					/*
					 * XXX ignore this case; due
					 * to a weakness in the quota
					 * proplib interface it can
					 * appear spuriously.
					 */
				} else {
					err(1, "%s: quota_delete (%s files)",
					    fst[i].f_mntonname, idname);
				}
			}
		}

		quota_close(qh);
	}

	free(ids);
}

////////////////////////////////////////////////////////////
// editor

/*
 * Take a list of privileges and get it edited.
 */
static int
editit(const char *ltmpfile)
{
	pid_t pid;
	int lst;
	char p[MAX_TMPSTR];
	const char *ed;
	sigset_t s, os;

	sigemptyset(&s);
	sigaddset(&s, SIGINT);
	sigaddset(&s, SIGQUIT);
	sigaddset(&s, SIGHUP);
	if (sigprocmask(SIG_BLOCK, &s, &os) == -1)
		err(1, "sigprocmask");
top:
	switch ((pid = fork())) {
	case -1:
		if (errno == EPROCLIM) {
			warnx("You have too many processes");
			return 0;
		}
		if (errno == EAGAIN) {
			sleep(1);
			goto top;
		}
		warn("fork");
		return 0;
	case 0:
		if (sigprocmask(SIG_SETMASK, &os, NULL) == -1)
			err(1, "sigprocmask");
		setgid(getgid());
		setuid(getuid());
		if ((ed = getenv("EDITOR")) == (char *)0)
			ed = _PATH_VI;
		if (strlen(ed) + strlen(ltmpfile) + 2 >= MAX_TMPSTR) {
			errx(1, "%s", "editor or filename too long");
		}
		snprintf(p, sizeof(p), "%s %s", ed, ltmpfile);
		execlp(_PATH_BSHELL, _PATH_BSHELL, "-c", p, NULL);
		err(1, "%s", ed);
	default:
		if (waitpid(pid, &lst, 0) == -1)
			err(1, "waitpid");
		if (sigprocmask(SIG_SETMASK, &os, NULL) == -1)
			err(1, "sigprocmask");
		if (!WIFEXITED(lst) || WEXITSTATUS(lst) != 0)
			return 0;
		return 1;
	}
}

/*
 * Convert a quotause list to an ASCII file.
 */
static int
writeprivs(struct quotalist *qlist, int outfd, const char *name,
    int idtype, const char *idtypename)
{
	struct quotause *qup;
	FILE *fd;
	char b0[32], b1[32], b2[32], b3[32];

	(void)ftruncate(outfd, 0);
	(void)lseek(outfd, (off_t)0, SEEK_SET);
	if ((fd = fdopen(dup(outfd), "w")) == NULL)
		errx(1, "fdopen");
	if (name == NULL) {
		fprintf(fd, "Default %s quotas:\n", idtypename);
	} else {
		fprintf(fd, "Quotas for %s %s:\n", idtypename, name);
	}
	for (qup = qlist->head; qup; qup = qup->next) {
		struct quotaval *q = qup->qv;
		fprintf(fd, "%s (%s):\n",
		     qup->fsname, qup->implementation);
		if (!qup->isdefault || qup->xgrace) {
			fprintf(fd, "\tblocks in use: %s, "
			    "limits (soft = %s, hard = %s",
			    intprt(b1, 21, q[QO_BLK].qv_usage,
			    HN_NOSPACE | HN_B, Hflag),
			    intprt(b2, 21, q[QO_BLK].qv_softlimit,
			    HN_NOSPACE | HN_B, Hflag),
			    intprt(b3, 21, q[QO_BLK].qv_hardlimit,
				HN_NOSPACE | HN_B, Hflag));
			if (qup->xgrace)
				fprintf(fd, ", ");
		} else
			fprintf(fd, "\tblocks: (");

		if (qup->xgrace || qup->isdefault) {
		    fprintf(fd, "grace = %s",
			timepprt(b0, 21, q[QO_BLK].qv_grace, Hflag));
		}
		fprintf(fd, ")\n");
		if (!qup->isdefault || qup->xgrace) {
			fprintf(fd, "\tinodes in use: %s, "
			    "limits (soft = %s, hard = %s",
			    intprt(b1, 21, q[QO_FL].qv_usage,
			    HN_NOSPACE, Hflag),
			    intprt(b2, 21, q[QO_FL].qv_softlimit,
			    HN_NOSPACE, Hflag),
			    intprt(b3, 21, q[QO_FL].qv_hardlimit,
			     HN_NOSPACE, Hflag));
			if (qup->xgrace)
				fprintf(fd, ", ");
		} else
			fprintf(fd, "\tinodes: (");

		if (qup->xgrace || qup->isdefault) {
		    fprintf(fd, "grace = %s",
			timepprt(b0, 21, q[QO_FL].qv_grace, Hflag));
		}
		fprintf(fd, ")\n");
	}
	fclose(fd);
	return 1;
}

/*
 * Merge changes to an ASCII file into a quotause list.
 */
static int
readprivs(struct quotalist *qlist, int infd, int dflag)
{
	struct quotause *qup;
	FILE *fd;
	int cnt;
	char fsp[BUFSIZ];
	static char line0[BUFSIZ], line1[BUFSIZ], line2[BUFSIZ];
	static char scurb[BUFSIZ], scuri[BUFSIZ], ssoft[BUFSIZ], shard[BUFSIZ];
	static char stime[BUFSIZ];
	uint64_t softb, hardb, softi, hardi;
	time_t graceb = -1, gracei = -1;
	int version;

	(void)lseek(infd, (off_t)0, SEEK_SET);
	fd = fdopen(dup(infd), "r");
	if (fd == NULL) {
		warn("Can't re-read temp file");
		return 0;
	}
	/*
	 * Discard title line, then read pairs of lines to process.
	 */
	(void) fgets(line1, sizeof (line1), fd);
	while (fgets(line0, sizeof (line0), fd) != NULL &&
	       fgets(line1, sizeof (line2), fd) != NULL &&
	       fgets(line2, sizeof (line2), fd) != NULL) {
		if (sscanf(line0, "%s (version %d):\n", fsp, &version) != 2) {
			warnx("%s: bad format", line0);
			goto out;
		}
#define last_char(str) ((str)[strlen(str) - 1])
		if (last_char(line1) != '\n') {
			warnx("%s:%s: bad format", fsp, line1);
			goto out;
		}
		last_char(line1) = '\0';
		if (last_char(line2) != '\n') {
			warnx("%s:%s: bad format", fsp, line2);
			goto out;
		}
		last_char(line2) = '\0';
		if (dflag && version == 1) {
			if (sscanf(line1,
			    "\tblocks: (grace = %s\n", stime) != 1) {
				warnx("%s:%s: bad format", fsp, line1);
				goto out;
			}
			if (last_char(stime) != ')') {
				warnx("%s:%s: bad format", fsp, line1);
				goto out;
			}
			last_char(stime) = '\0';
			if (timeprd(stime, &graceb) != 0) {
				warnx("%s:%s: bad number", fsp, stime);
				goto out;
			}
			if (sscanf(line2,
			    "\tinodes: (grace = %s\n", stime) != 1) {
				warnx("%s:%s: bad format", fsp, line2);
				goto out;
			}
			if (last_char(stime) != ')') {
				warnx("%s:%s: bad format", fsp, line2);
				goto out;
			}
			last_char(stime) = '\0';
			if (timeprd(stime, &gracei) != 0) {
				warnx("%s:%s: bad number", fsp, stime);
				goto out;
			}
		} else {
			cnt = sscanf(line1,
			    "\tblocks in use: %s limits (soft = %s hard = %s "
			    "grace = %s", scurb, ssoft, shard, stime);
			if (cnt == 3) {
				if (version != 1 ||
				    last_char(scurb) != ',' ||
				    last_char(ssoft) != ',' ||
				    last_char(shard) != ')') {
					warnx("%s:%s: bad format %d",
					    fsp, line1, cnt);
					goto out;
				}
				stime[0] = '\0';
			} else if (cnt == 4) {
				if (version < 2 ||
				    last_char(scurb) != ',' ||
				    last_char(ssoft) != ',' ||
				    last_char(shard) != ',' ||
				    last_char(stime) != ')') {
					warnx("%s:%s: bad format %d",
					    fsp, line1, cnt);
					goto out;
				}
			} else {
				warnx("%s: %s: bad format cnt %d", fsp, line1,
				    cnt);
				goto out;
			}
			/* drop last char which is ',' or ')' */
			last_char(scurb) = '\0';
			last_char(ssoft) = '\0';
			last_char(shard) = '\0';
			last_char(stime) = '\0';

			if (intrd(ssoft, &softb, HN_B) != 0) {
				warnx("%s:%s: bad number", fsp, ssoft);
				goto out;
			}
			if (intrd(shard, &hardb, HN_B) != 0) {
				warnx("%s:%s: bad number", fsp, shard);
				goto out;
			}
			if (cnt == 4) {
				if (timeprd(stime, &graceb) != 0) {
					warnx("%s:%s: bad number", fsp, stime);
					goto out;
				}
			}

			cnt = sscanf(line2,
			    "\tinodes in use: %s limits (soft = %s hard = %s "
			    "grace = %s", scuri, ssoft, shard, stime);
			if (cnt == 3) {
				if (version != 1 ||
				    last_char(scuri) != ',' ||
				    last_char(ssoft) != ',' ||
				    last_char(shard) != ')') {
					warnx("%s:%s: bad format %d",
					    fsp, line2, cnt);
					goto out;
				}
				stime[0] = '\0';
			} else if (cnt == 4) {
				if (version < 2 ||
				    last_char(scuri) != ',' ||
				    last_char(ssoft) != ',' ||
				    last_char(shard) != ',' ||
				    last_char(stime) != ')') {
					warnx("%s:%s: bad format %d",
					    fsp, line2, cnt);
					goto out;
				}
			} else {
				warnx("%s: %s: bad format", fsp, line2);
				goto out;
			}
			/* drop last char which is ',' or ')' */
			last_char(scuri) = '\0';
			last_char(ssoft) = '\0';
			last_char(shard) = '\0';
			last_char(stime) = '\0';
			if (intrd(ssoft, &softi, 0) != 0) {
				warnx("%s:%s: bad number", fsp, ssoft);
				goto out;
			}
			if (intrd(shard, &hardi, 0) != 0) {
				warnx("%s:%s: bad number", fsp, shard);
				goto out;
			}
			if (cnt == 4) {
				if (timeprd(stime, &gracei) != 0) {
					warnx("%s:%s: bad number", fsp, stime);
					goto out;
				}
			}
		}
		for (qup = qlist->head; qup; qup = qup->next) {
			struct quotaval *q = qup->qv;
			char b1[32], b2[32];
			if (strcmp(fsp, qup->fsname))
				continue;
			if (version == 1 && dflag) {
				q[QO_BLK].qv_grace = graceb;
				q[QO_FL].qv_grace = gracei;
				qup->found = 1;
				continue;
			}

			if (strcmp(intprt(b1, 21, q[QO_BLK].qv_usage,
			    HN_NOSPACE | HN_B, Hflag),
			    scurb) != 0 ||
			    strcmp(intprt(b2, 21, q[QO_FL].qv_usage,
			    HN_NOSPACE, Hflag),
			    scuri) != 0) {
				warnx("%s: cannot change current allocation",
				    fsp);
				break;
			}
			/*
			 * Cause time limit to be reset when the quota
			 * is next used if previously had no soft limit
			 * or were under it, but now have a soft limit
			 * and are over it.
			 */
			if (q[QO_BLK].qv_usage &&
			    q[QO_BLK].qv_usage >= softb &&
			    (q[QO_BLK].qv_softlimit == 0 ||
			     q[QO_BLK].qv_usage < q[QO_BLK].qv_softlimit))
				q[QO_BLK].qv_expiretime = 0;
			if (q[QO_FL].qv_usage &&
			    q[QO_FL].qv_usage >= softi &&
			    (q[QO_FL].qv_softlimit == 0 ||
			     q[QO_FL].qv_usage < q[QO_FL].qv_softlimit))
				q[QO_FL].qv_expiretime = 0;
			q[QO_BLK].qv_softlimit = softb;
			q[QO_BLK].qv_hardlimit = hardb;
			if (version == 2)
				q[QO_BLK].qv_grace = graceb;
			q[QO_FL].qv_softlimit  = softi;
			q[QO_FL].qv_hardlimit  = hardi;
			if (version == 2)
				q[QO_FL].qv_grace = gracei;
			qup->found = 1;
		}
	}
out:
	fclose(fd);
	/*
	 * Disable quotas for any filesystems that have not been found.
	 */
	for (qup = qlist->head; qup; qup = qup->next) {
		struct quotaval *q = qup->qv;
		if (qup->found) {
			qup->found = 0;
			continue;
		}
		q[QO_BLK].qv_softlimit = UQUAD_MAX;
		q[QO_BLK].qv_hardlimit = UQUAD_MAX;
		q[QO_BLK].qv_grace = 0;
		q[QO_FL].qv_softlimit = UQUAD_MAX;
		q[QO_FL].qv_hardlimit = UQUAD_MAX;
		q[QO_FL].qv_grace = 0;
	}
	return 1;
}

////////////////////////////////////////////////////////////
// actions

static void
replicate(const char *fs, int idtype, const char *protoname,
	  char **names, int numnames)
{
	long protoid, id;
	struct quotalist *protoprivs;
	struct quotause *qup;
	int i;

	if ((protoid = getidbyname(protoname, idtype)) == -1)
		exit(1);
	protoprivs = getprivs(protoid, 0, idtype, fs);
	for (qup = protoprivs->head; qup; qup = qup->next) {
		qup->qv[QO_BLK].qv_expiretime = 0;
		qup->qv[QO_FL].qv_expiretime = 0;
	}
	for (i=0; i<numnames; i++) {
		id = getidbyname(names[i], idtype);
		if (id == -1)
			continue;
		putprivs(id, idtype, protoprivs);
	}
	/* XXX */
	/* quotalist_destroy(protoprivs); */
}

static void
assign(const char *fs, int idtype,
       char *soft, char *hard, char *grace,
       char **names, int numnames)
{
	struct quotalist *curprivs;
	struct quotause *lqup;
	u_int64_t softb, hardb, softi, hardi;
	time_t  graceb, gracei;
	char *str;
	long id;
	int dflag;
	int i;

	if (soft) {
		str = strsep(&soft, "/");
		if (str[0] == '\0' || soft == NULL || soft[0] == '\0')
			usage();

		if (intrd(str, &softb, HN_B) != 0)
			errx(1, "%s: bad number", str);
		if (intrd(soft, &softi, 0) != 0)
			errx(1, "%s: bad number", soft);
	}
	if (hard) {
		str = strsep(&hard, "/");
		if (str[0] == '\0' || hard == NULL || hard[0] == '\0')
			usage();

		if (intrd(str, &hardb, HN_B) != 0)
			errx(1, "%s: bad number", str);
		if (intrd(hard, &hardi, 0) != 0)
			errx(1, "%s: bad number", hard);
	}
	if (grace) {
		str = strsep(&grace, "/");
		if (str[0] == '\0' || grace == NULL || grace[0] == '\0')
			usage();

		if (timeprd(str, &graceb) != 0)
			errx(1, "%s: bad number", str);
		if (timeprd(grace, &gracei) != 0)
			errx(1, "%s: bad number", grace);
	}
	for (i=0; i<numnames; i++) {
		if (names[i] == NULL) {
			id = 0;
			dflag = 1;
		} else {
			id = getidbyname(names[i], idtype);
			if (id == -1)
				continue;
			dflag = 0;
		}

		curprivs = getprivs(id, dflag, idtype, fs);
		for (lqup = curprivs->head; lqup; lqup = lqup->next) {
			struct quotaval *q = lqup->qv;
			if (soft) {
				if (!dflag && softb &&
				    q[QO_BLK].qv_usage >= softb &&
				    (q[QO_BLK].qv_softlimit == 0 ||
				     q[QO_BLK].qv_usage <
				     q[QO_BLK].qv_softlimit))
					q[QO_BLK].qv_expiretime = 0;
				if (!dflag && softi &&
				    q[QO_FL].qv_usage >= softb &&
				    (q[QO_FL].qv_softlimit == 0 ||
				     q[QO_FL].qv_usage <
				     q[QO_FL].qv_softlimit))
					q[QO_FL].qv_expiretime = 0;
				q[QO_BLK].qv_softlimit = softb;
				q[QO_FL].qv_softlimit = softi;
			}
			if (hard) {
				q[QO_BLK].qv_hardlimit = hardb;
				q[QO_FL].qv_hardlimit = hardi;
			}
			if (grace) {
				q[QO_BLK].qv_grace = graceb;
				q[QO_FL].qv_grace = gracei;
			}
		}
		putprivs(id, idtype, curprivs);
		quotalist_destroy(curprivs);
	}
}

static void
clear(const char *fs, int idtype, char **names, int numnames)
{
	clearpriv(numnames, names, fs, idtype);
}

static void
editone(const char *fs, int idtype, const char *name,
	int tmpfd, const char *tmppath)
{
	struct quotalist *curprivs;
	long id;
	int dflag;

	if (name == NULL) {
		id = 0;
		dflag = 1;
	} else {
		id = getidbyname(name, idtype);
		if (id == -1)
			return;
		dflag = 0;
	}
	curprivs = getprivs(id, dflag, idtype, fs);

	if (writeprivs(curprivs, tmpfd, name, idtype,
		       curprivs->idtypename) == 0)
		goto fail;

	if (editit(tmppath) == 0)
		goto fail;

	if (readprivs(curprivs, tmpfd, dflag) == 0)
		goto fail;

	putprivs(id, idtype, curprivs);
fail:
	quotalist_destroy(curprivs);
}

static void
edit(const char *fs, int idtype, char **names, int numnames)
{
	char tmppath[] = _PATH_TMPFILE;
	int tmpfd, i;

	tmpfd = mkstemp(tmppath);
	fchown(tmpfd, getuid(), getgid());

	for (i=0; i<numnames; i++) {
		editone(fs, idtype, names[i], tmpfd, tmppath);
	}

	close(tmpfd);
	unlink(tmppath);
}

////////////////////////////////////////////////////////////
// main

static void
usage(void)
{
	const char *p = getprogname();
	fprintf(stderr,
	    "Usage: %s [-D] [-H] [-u] [-p <username>] [-f <filesystem>] "
		"-d | <username> ...\n"
	    "\t%s [-D] [-H] -g [-p <groupname>] [-f <filesystem>] "
		"-d | <groupname> ...\n"
	    "\t%s [-D] [-u] [-f <filesystem>] [-s b#/i#] [-h b#/i#] [-t t#/t#] "
		"-d | <username> ...\n"
	    "\t%s [-D] -g [-f <filesystem>] [-s b#/i#] [-h b#/i#] [-t t#/t#] "
		"-d | <groupname> ...\n"
	    "\t%s [-D] [-H] [-u] -c [-f <filesystem>] username ...\n"
	    "\t%s [-D] [-H] -g -c [-f <filesystem>] groupname ...\n",
	    p, p, p, p, p, p);
	exit(1);
}

int
main(int argc, char *argv[])
{
	int idtype;
	char *protoname;
	char *soft = NULL, *hard = NULL, *grace = NULL;
	char *fs = NULL;
	int ch;
	int pflag = 0;
	int cflag = 0;
	int dflag = 0;

	if (argc < 2)
		usage();
	if (getuid())
		errx(1, "permission denied");
	protoname = NULL;
	idtype = QUOTA_IDTYPE_USER;
	while ((ch = getopt(argc, argv, "Hcdugp:s:h:t:f:")) != -1) {
		switch(ch) {
		case 'H':
			Hflag++;
			break;
		case 'c':
			cflag++;
			break;
		case 'd':
			dflag++;
			break;
		case 'p':
			protoname = optarg;
			pflag++;
			break;
		case 'g':
			idtype = QUOTA_IDTYPE_GROUP;
			break;
		case 'u':
			idtype = QUOTA_IDTYPE_USER;
			break;
		case 's':
			soft = optarg;
			break;
		case 'h':
			hard = optarg;
			break;
		case 't':
			grace = optarg;
			break;
		case 'f':
			fs = optarg;
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (pflag) {
		if (soft || hard || grace || dflag || cflag)
			usage();
		replicate(fs, idtype, protoname, argv, argc);
	} else if (soft || hard || grace) {
		if (cflag)
			usage();
		if (dflag) {
			/* use argv[argc], which is null, to mean 'default' */
			argc++;
		}
		assign(fs, idtype, soft, hard, grace, argv, argc);
	} else if (cflag) {
		if (dflag)
			usage();
		clear(fs, idtype, argv, argc);
	} else {
		if (dflag) {
			/* use argv[argc], which is null, to mean 'default' */
			argc++;
		}
		edit(fs, idtype, argv, argc);
	}
	return 0;
}