611 lines
13 KiB
C
611 lines
13 KiB
C
/* $NetBSD: quota.c,v 1.50 2014/07/13 01:46:04 dholland Exp $ */
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/*
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* Copyright (c) 1980, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Robert Elz at The University of Melbourne.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)quota.c 8.4 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: quota.c,v 1.50 2014/07/13 01:46:04 dholland Exp $");
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#endif
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#endif /* not lint */
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/*
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* Disk quota reporting program.
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <assert.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fstab.h>
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#include <grp.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <quota.h>
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#include "printquota.h"
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struct quotause {
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struct quotause *next;
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uid_t id;
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struct quotaval *qvs;
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unsigned numqvs;
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char fsname[MAXPATHLEN + 1];
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struct quotahandle *qh;
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};
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static int anyusage(struct quotaval *, unsigned);
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static int anyover(struct quotaval *, unsigned, time_t);
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static const char *getovermsg(struct quotaval *, const char *, time_t);
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static struct quotause *getprivs(id_t, int);
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static void heading(int, const char *, id_t, const char *, const char *);
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static int isover(struct quotaval *qv, time_t now);
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static void printqv(struct quotaval *, int, time_t);
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static void showgid(gid_t);
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static void showgrpname(const char *);
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static void showonequota(int, const char *, id_t, const char *,
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struct quotause *);
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static void showquotas(int, const char *, id_t, const char *);
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static void showuid(uid_t);
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static void showusrname(const char *);
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static int unlimited(struct quotaval *qvs, unsigned numqvs);
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static void usage(void) __dead;
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static int qflag = 0;
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static int vflag = 0;
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static int hflag = 0;
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static int dflag = 0;
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static uid_t myuid;
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static int needheading;
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int
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main(int argc, char *argv[])
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{
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int ngroups;
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gid_t mygid, gidset[NGROUPS];
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int i, gflag = 0, uflag = 0;
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int ch;
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myuid = getuid();
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while ((ch = getopt(argc, argv, "dhugvq")) != -1) {
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switch(ch) {
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case 'g':
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gflag++;
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break;
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case 'u':
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uflag++;
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break;
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case 'v':
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vflag++;
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break;
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case 'q':
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qflag++;
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break;
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case 'h':
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hflag++;
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break;
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case 'd':
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dflag++;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (!uflag && !gflag)
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uflag++;
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if (dflag) {
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#if 0
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if (myuid != 0)
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errx(1, "-d: permission denied");
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#endif
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if (uflag)
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showquotas(QUOTA_IDTYPE_USER, "user", 0, "");
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if (gflag)
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showquotas(QUOTA_IDTYPE_GROUP, "group", 0, "");
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return 0;
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}
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if (argc == 0) {
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if (uflag)
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showuid(myuid);
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if (gflag) {
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if (dflag)
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showgid(0);
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else {
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mygid = getgid();
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ngroups = getgroups(NGROUPS, gidset);
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if (ngroups < 0)
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err(1, "getgroups");
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showgid(mygid);
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for (i = 0; i < ngroups; i++)
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if (gidset[i] != mygid)
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showgid(gidset[i]);
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}
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}
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return 0;
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}
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if (uflag && gflag)
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usage();
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if (uflag) {
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for (; argc > 0; argc--, argv++) {
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if (alldigits(*argv))
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showuid((uid_t)atoi(*argv));
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else
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showusrname(*argv);
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}
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return 0;
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}
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if (gflag) {
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for (; argc > 0; argc--, argv++) {
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if (alldigits(*argv))
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showgid((gid_t)atoi(*argv));
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else
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showgrpname(*argv);
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}
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return 0;
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}
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/* NOTREACHED */
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return 0;
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}
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static void
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usage(void)
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{
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const char *p = getprogname();
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fprintf(stderr, "Usage: %s [-Dhguqv]\n"
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"\t%s [-Dhqv] -u username ...\n"
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"\t%s [-Dhqv] -g groupname ...\n"
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"\t%s -d [-Dhguqv]\n", p, p, p, p);
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exit(1);
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}
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/*
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* Print out quotas for a specified user identifier.
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*/
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static void
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showuid(uid_t uid)
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{
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struct passwd *pwd = getpwuid(uid);
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const char *name;
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if (pwd == NULL)
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name = "(no account)";
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else
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name = pwd->pw_name;
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if (uid != myuid && myuid != 0) {
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warnx("%s (uid %d): permission denied", name, uid);
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return;
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}
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showquotas(QUOTA_IDTYPE_USER, "user", uid, name);
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}
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/*
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* Print out quotas for a specified user name.
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*/
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static void
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showusrname(const char *name)
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{
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struct passwd *pwd = getpwnam(name);
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if (pwd == NULL) {
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warnx("%s: unknown user", name);
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return;
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}
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if (pwd->pw_uid != myuid && myuid != 0) {
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warnx("%s (uid %d): permission denied", name, pwd->pw_uid);
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return;
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}
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showquotas(QUOTA_IDTYPE_USER, "user", pwd->pw_uid, name);
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}
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/*
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* Print out quotas for a specified group identifier.
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*/
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static void
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showgid(gid_t gid)
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{
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struct group *grp = getgrgid(gid);
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int ngroups;
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gid_t mygid, gidset[NGROUPS];
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int i;
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const char *name;
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if (grp == NULL)
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name = "(no entry)";
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else
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name = grp->gr_name;
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mygid = getgid();
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ngroups = getgroups(NGROUPS, gidset);
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if (ngroups < 0) {
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warn("getgroups");
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return;
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}
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if (gid != mygid) {
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for (i = 0; i < ngroups; i++)
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if (gid == gidset[i])
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break;
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if (i >= ngroups && myuid != 0) {
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warnx("%s (gid %d): permission denied", name, gid);
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return;
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}
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}
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showquotas(QUOTA_IDTYPE_GROUP, "group", gid, name);
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}
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/*
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* Print out quotas for a specified group name.
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*/
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static void
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showgrpname(const char *name)
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{
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struct group *grp = getgrnam(name);
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int ngroups;
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gid_t mygid, gidset[NGROUPS];
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int i;
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if (grp == NULL) {
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warnx("%s: unknown group", name);
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return;
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}
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mygid = getgid();
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ngroups = getgroups(NGROUPS, gidset);
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if (ngroups < 0) {
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warn("getgroups");
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return;
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}
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if (grp->gr_gid != mygid) {
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for (i = 0; i < ngroups; i++)
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if (grp->gr_gid == gidset[i])
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break;
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if (i >= ngroups && myuid != 0) {
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warnx("%s (gid %d): permission denied",
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name, grp->gr_gid);
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return;
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}
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}
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showquotas(QUOTA_IDTYPE_GROUP, "group", grp->gr_gid, name);
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}
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static void
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showquotas(int idtype, const char *idtypename, id_t id, const char *idname)
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{
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struct quotause *qup;
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struct quotause *quplist;
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needheading = 1;
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quplist = getprivs(id, idtype);
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for (qup = quplist; qup; qup = qup->next) {
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showonequota(idtype, idtypename, id, idname, qup);
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}
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if (!qflag) {
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/* In case nothing printed, issue a header saying "none" */
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heading(idtype, idtypename, id, idname, "none");
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}
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}
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static void
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showonequota(int idtype, const char *idtypename, id_t id, const char *idname,
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struct quotause *qup)
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{
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static time_t now;
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struct quotaval *qvs;
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unsigned numqvs, i;
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const char *msg;
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qvs = qup->qvs;
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numqvs = qup->numqvs;
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if (now == 0) {
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time(&now);
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}
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if (!vflag && unlimited(qvs, numqvs)) {
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return;
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}
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if (qflag) {
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for (i=0; i<numqvs; i++) {
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msg = getovermsg(&qvs[i],
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quota_idtype_getname(qup->qh, i),
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now);
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if (msg != NULL) {
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heading(idtype, idtypename, id, idname, "");
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printf("\t%s %s\n", msg, qup->fsname);
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}
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}
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return;
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}
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/*
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* XXX this behavior appears to be demanded by the ATF tests,
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* although it seems to be at variance with the preexisting
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* logic in quota.c.
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*/
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if (unlimited(qvs, numqvs) && !anyusage(qvs, numqvs)) {
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return;
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}
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/*
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* XXX: anyover can in fact be true if anyusage is not true,
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* if there's a quota of zero set on some volume. This is
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* because the check we do checks if adding one more thing
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* will go over. That is reasonable, I suppose, but arguably
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* the resulting behavior with usage 0 is a bug. (Also, what
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* reason do we have to believe that the reported grace expire
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* time is valid if we aren't in fact over yet?)
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*/
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if (vflag || dflag || anyover(qvs, numqvs, now) ||
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anyusage(qvs, numqvs)) {
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heading(idtype, idtypename, id, idname, "");
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if (strlen(qup->fsname) > 4) {
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printf("%s\n", qup->fsname);
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printf("%12s", "");
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} else {
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printf("%12s", qup->fsname);
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}
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for (i=0; i<numqvs; i++) {
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printqv(&qvs[i],
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quota_objtype_isbytes(qup->qh, i), now);
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}
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printf("\n");
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}
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}
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static void
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heading(int idtype, const char *idtypename, id_t id, const char *idname,
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const char *tag)
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{
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if (needheading == 0)
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return;
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needheading = 0;
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if (dflag)
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printf("Default %s disk quotas: %s\n", idtypename, tag);
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else
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printf("Disk quotas for %s %s (%cid %u): %s\n",
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idtypename, idname, idtypename[0], id, tag);
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if (!qflag && tag[0] == '\0') {
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printf("%12s%9s %8s%9s%8s%8s %7s%8s%8s\n"
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, "Filesystem"
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, "blocks"
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, "quota"
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, "limit"
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, "grace"
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, "files"
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, "quota"
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, "limit"
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, "grace"
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);
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}
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}
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static void
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printqv(struct quotaval *qv, int isbytes, time_t now)
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{
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char buf[20];
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const char *str;
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int intprtflags, over, width;
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/*
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* The assorted finagling of width is to match the previous
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* open-coded formatting for exactly two quota object types,
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* which was chosen to make the default report fit in 80
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* columns.
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*/
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width = isbytes ? 9 : 8;
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intprtflags = isbytes ? HN_B : 0;
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over = isover(qv, now);
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str = intprt(buf, width, qv->qv_usage, intprtflags, hflag);
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printf("%*s", width, str);
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printf("%c", over ? '*' : ' ');
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str = intprt(buf, width, qv->qv_softlimit, intprtflags, hflag);
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printf("%*s", width-1, str);
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str = intprt(buf, width, qv->qv_hardlimit, intprtflags, hflag);
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printf("%*s", width, str);
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if (over) {
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str = timeprt(buf, 9, now, qv->qv_expiretime);
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} else if (vflag && qv->qv_grace != QUOTA_NOTIME) {
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str = timeprt(buf, 9, 0, qv->qv_grace);
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} else {
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str = "";
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}
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printf("%8s", str);
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}
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/*
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* Collect the requested quota information.
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*/
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static struct quotause *
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getprivs(id_t id, int idtype)
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{
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struct quotause *qup, *quptail;
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struct quotause *quphead;
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struct statvfs *fst;
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struct quotakey qk;
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int nfst, i;
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unsigned j;
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qup = quphead = quptail = NULL;
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nfst = getmntinfo(&fst, MNT_WAIT);
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if (nfst == 0)
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errx(2, "no filesystems mounted!");
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for (i = 0; i < nfst; i++) {
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if (qup == NULL) {
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if ((qup = malloc(sizeof *qup)) == NULL)
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err(1, "Out of memory");
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}
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qup->qh = quota_open(fst[i].f_mntonname);
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if (qup->qh == NULL) {
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if (errno == EOPNOTSUPP || errno == ENXIO) {
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continue;
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}
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err(1, "%s: quota_open", fst[i].f_mntonname);
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}
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qup->numqvs = quota_getnumidtypes(qup->qh);
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qup->qvs = malloc(qup->numqvs * sizeof(qup->qvs[0]));
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if (qup->qvs == NULL) {
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err(1, "Out of memory");
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}
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qk.qk_idtype = idtype;
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if (dflag) {
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qk.qk_id = QUOTA_DEFAULTID;
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} else {
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qk.qk_id = id;
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}
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for (j=0; j<qup->numqvs; j++) {
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qk.qk_objtype = j;
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if (quota_get(qup->qh, &qk, &qup->qvs[j]) < 0) {
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if (errno != ENOENT && errno != ENODEV) {
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warn("%s: quota_get (objtype %u)",
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fst[i].f_mntonname, j);
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}
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quotaval_clear(&qup->qvs[j]);
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}
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}
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(void)strlcpy(qup->fsname, fst[i].f_mntonname,
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sizeof(qup->fsname));
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if (quphead == NULL)
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quphead = qup;
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else
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quptail->next = qup;
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quptail = qup;
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quptail->next = 0;
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qup = NULL;
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}
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free(qup);
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return quphead;
|
|
}
|
|
|
|
static int
|
|
unlimited(struct quotaval *qvs, unsigned numqvs)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i=0; i<numqvs; i++) {
|
|
if (qvs[i].qv_softlimit != QUOTA_NOLIMIT ||
|
|
qvs[i].qv_hardlimit != QUOTA_NOLIMIT) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
anyusage(struct quotaval *qvs, unsigned numqvs)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i=0; i<numqvs; i++) {
|
|
if (qvs[i].qv_usage > 0) {
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
anyover(struct quotaval *qvs, unsigned numqvs, time_t now)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i=0; i<numqvs; i++) {
|
|
if (isover(&qvs[i], now)) {
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
isover(struct quotaval *qv, time_t now)
|
|
{
|
|
return (qv->qv_usage >= qv->qv_hardlimit ||
|
|
qv->qv_usage >= qv->qv_softlimit);
|
|
}
|
|
|
|
static const char *
|
|
getovermsg(struct quotaval *qv, const char *what, time_t now)
|
|
{
|
|
static char buf[64];
|
|
|
|
if (qv->qv_usage >= qv->qv_hardlimit) {
|
|
snprintf(buf, sizeof(buf), "%c%s limit reached on",
|
|
toupper((unsigned char)what[0]), what+1);
|
|
return buf;
|
|
}
|
|
|
|
if (qv->qv_usage < qv->qv_softlimit) {
|
|
/* Ok */
|
|
return NULL;
|
|
}
|
|
|
|
if (now > qv->qv_expiretime) {
|
|
snprintf(buf, sizeof(buf), "Over %s quota on", what);
|
|
return buf;
|
|
}
|
|
|
|
snprintf(buf, sizeof(buf), "In %s grace period on", what);
|
|
return buf;
|
|
}
|