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NetBSD/usr.bin/quota/quota.c

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/* $NetBSD: quota.c,v 1.37 2011/03/24 17:05:46 bouyer 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[] = "@(#)quota.c 8.4 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: quota.c,v 1.37 2011/03/24 17:05:46 bouyer Exp $");
#endif
#endif /* not lint */
/*
* Disk quota reporting program.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <quota/quotaprop.h>
#include <quota/quota.h>
#include "printquota.h"
#include "getvfsquota.h"
struct quotause {
struct quotause *next;
long flags;
uid_t id;
struct ufs_quota_entry qe[QUOTA_NLIMITS];
char fsname[MAXPATHLEN + 1];
};
#define FOUND 0x01
#define QUOTA2 0x02
static struct quotause *getprivs(uint32_t, int);
static void heading(int, uint32_t, const char *, const char *);
static void showgid(gid_t);
static void showgrpname(const char *);
static void showquotas(int, uint32_t, const char *);
static void showuid(uid_t);
static void showusrname(const char *);
static void usage(void) __attribute__((__noreturn__));
static int qflag = 0;
static int vflag = 0;
static int hflag = 0;
static int dflag = 0;
static int Dflag = 0;
static uid_t myuid;
int
main(int argc, char *argv[])
{
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i, gflag = 0, uflag = 0;
int ch;
myuid = getuid();
while ((ch = getopt(argc, argv, "Ddhugvq")) != -1) {
switch(ch) {
case 'g':
gflag++;
break;
case 'u':
uflag++;
break;
case 'v':
vflag++;
break;
case 'q':
qflag++;
break;
case 'h':
hflag++;
break;
case 'd':
dflag++;
break;
case 'D':
Dflag++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!uflag && !gflag)
uflag++;
if (dflag) {
#if 0
if (myuid != 0)
errx(1, "-d: permission denied");
#endif
if (uflag)
showquotas(QUOTA_CLASS_USER, 0, "");
if (gflag)
showquotas(QUOTA_CLASS_GROUP, 0, "");
return 0;
}
if (argc == 0) {
if (uflag)
showuid(myuid);
if (gflag) {
if (dflag)
showgid(0);
else {
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0)
err(1, "getgroups");
showgid(mygid);
for (i = 0; i < ngroups; i++)
if (gidset[i] != mygid)
showgid(gidset[i]);
}
}
return 0;
}
if (uflag && gflag)
usage();
if (uflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showuid((uid_t)atoi(*argv));
else
showusrname(*argv);
}
return 0;
}
if (gflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showgid((gid_t)atoi(*argv));
else
showgrpname(*argv);
}
return 0;
}
/* NOTREACHED */
return 0;
}
static void
usage(void)
{
const char *p = getprogname();
fprintf(stderr, "Usage: %s [-Dhguqv]\n"
"\t%s [-Dhqv] -u username ...\n"
"\t%s [-Dhqv] -g groupname ...\n"
"\t%s -d [-Dhguqv]\n", p, p, p, p);
exit(1);
}
/*
* Print out quotas for a specified user identifier.
*/
static void
showuid(uid_t uid)
{
struct passwd *pwd = getpwuid(uid);
const char *name;
if (pwd == NULL)
name = "(no account)";
else
name = pwd->pw_name;
if (uid != myuid && myuid != 0) {
warnx("%s (uid %d): permission denied", name, uid);
return;
}
showquotas(QUOTA_CLASS_USER, uid, name);
}
/*
* Print out quotas for a specified user name.
*/
static void
showusrname(const char *name)
{
struct passwd *pwd = getpwnam(name);
if (pwd == NULL) {
warnx("%s: unknown user", name);
return;
}
if (pwd->pw_uid != myuid && myuid != 0) {
warnx("%s (uid %d): permission denied", name, pwd->pw_uid);
return;
}
showquotas(QUOTA_CLASS_USER, pwd->pw_uid, name);
}
/*
* Print out quotas for a specified group identifier.
*/
static void
showgid(gid_t gid)
{
struct group *grp = getgrgid(gid);
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i;
const char *name;
if (grp == NULL)
name = "(no entry)";
else
name = grp->gr_name;
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0) {
warn("getgroups");
return;
}
if (gid != mygid) {
for (i = 0; i < ngroups; i++)
if (gid == gidset[i])
break;
if (i >= ngroups && myuid != 0) {
warnx("%s (gid %d): permission denied", name, gid);
return;
}
}
showquotas(QUOTA_CLASS_GROUP, gid, name);
}
/*
* Print out quotas for a specified group name.
*/
static void
showgrpname(const char *name)
{
struct group *grp = getgrnam(name);
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i;
if (grp == NULL) {
warnx("%s: unknown group", name);
return;
}
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0) {
warn("getgroups");
return;
}
if (grp->gr_gid != mygid) {
for (i = 0; i < ngroups; i++)
if (grp->gr_gid == gidset[i])
break;
if (i >= ngroups && myuid != 0) {
warnx("%s (gid %d): permission denied",
name, grp->gr_gid);
return;
}
}
showquotas(QUOTA_CLASS_GROUP, grp->gr_gid, name);
}
static void
showquotas(int type, uint32_t id, const char *name)
{
struct quotause *qup;
struct quotause *quplist;
const char *msgi, *msgb, *nam, *timemsg;
int lines = 0;
static time_t now;
char b0[20], b1[20], b2[20], b3[20];
if (now == 0)
time(&now);
quplist = getprivs(id, type);
for (qup = quplist; qup; qup = qup->next) {
int ql_stat;
struct ufs_quota_entry *q = qup->qe;
if (!vflag &&
q[QUOTA_LIMIT_BLOCK].ufsqe_softlimit == UQUAD_MAX &&
q[QUOTA_LIMIT_BLOCK].ufsqe_hardlimit == UQUAD_MAX &&
q[QUOTA_LIMIT_FILE].ufsqe_softlimit == UQUAD_MAX &&
q[QUOTA_LIMIT_FILE].ufsqe_hardlimit == UQUAD_MAX)
continue;
ql_stat = quota_check_limit(q[QUOTA_LIMIT_FILE].ufsqe_cur, 1,
q[QUOTA_LIMIT_FILE].ufsqe_softlimit,
q[QUOTA_LIMIT_FILE].ufsqe_hardlimit,
q[QUOTA_LIMIT_FILE].ufsqe_time, now);
switch(QL_STATUS(ql_stat)) {
case QL_S_DENY_HARD:
msgi = "File limit reached on";
break;
case QL_S_DENY_GRACE:
msgi = "Over file quota on";
break;
case QL_S_ALLOW_SOFT:
msgi = "In file grace period on";
break;
default:
msgi = NULL;
}
ql_stat = quota_check_limit(q[QUOTA_LIMIT_BLOCK].ufsqe_cur, 1,
q[QUOTA_LIMIT_BLOCK].ufsqe_softlimit,
q[QUOTA_LIMIT_BLOCK].ufsqe_hardlimit,
q[QUOTA_LIMIT_BLOCK].ufsqe_time, now);
switch(QL_STATUS(ql_stat)) {
case QL_S_DENY_HARD:
msgb = "Block limit reached on";
break;
case QL_S_DENY_GRACE:
msgb = "Over block quota on";
break;
case QL_S_ALLOW_SOFT:
msgb = "In block grace period on";
break;
default:
msgb = NULL;
}
if (qflag) {
if ((msgi != NULL || msgb != NULL) &&
lines++ == 0)
heading(type, id, name, "");
if (msgi != NULL)
printf("\t%s %s\n", msgi, qup->fsname);
if (msgb != NULL)
printf("\t%s %s\n", msgb, qup->fsname);
continue;
}
if (vflag || dflag || msgi || msgb ||
q[QUOTA_LIMIT_BLOCK].ufsqe_cur ||
q[QUOTA_LIMIT_FILE].ufsqe_cur) {
if (lines++ == 0)
heading(type, id, name, "");
nam = qup->fsname;
if (strlen(qup->fsname) > 4) {
printf("%s\n", qup->fsname);
nam = "";
}
if (msgb)
timemsg = timeprt(b0, 9, now,
q[QUOTA_LIMIT_BLOCK].ufsqe_time);
else if ((qup->flags & QUOTA2) != 0 && vflag)
timemsg = timeprt(b0, 9, 0,
q[QUOTA_LIMIT_BLOCK].ufsqe_grace);
else
timemsg = "";
printf("%12s%9s%c%8s%9s%8s",
nam,
intprt(b1, 9, q[QUOTA_LIMIT_BLOCK].ufsqe_cur,
HN_B, hflag),
(msgb == NULL) ? ' ' : '*',
intprt(b2, 9, q[QUOTA_LIMIT_BLOCK].ufsqe_softlimit,
HN_B, hflag),
intprt(b3, 9, q[QUOTA_LIMIT_BLOCK].ufsqe_hardlimit,
HN_B, hflag),
timemsg);
if (msgi)
timemsg = timeprt(b0, 9, now,
q[QUOTA_LIMIT_FILE].ufsqe_time);
else if ((qup->flags & QUOTA2) != 0 && vflag)
timemsg = timeprt(b0, 9, 0,
q[QUOTA_LIMIT_FILE].ufsqe_grace);
else
timemsg = "";
printf("%8s%c%7s%8s%8s\n",
intprt(b1, 8, q[QUOTA_LIMIT_FILE].ufsqe_cur, 0,
hflag),
(msgi == NULL) ? ' ' : '*',
intprt(b2, 8, q[QUOTA_LIMIT_FILE].ufsqe_softlimit,
0, hflag),
intprt(b3, 8, q[QUOTA_LIMIT_FILE].ufsqe_hardlimit,
0, hflag),
timemsg);
continue;
}
}
if (!qflag && lines == 0)
heading(type, id, name, "none");
}
static void
heading(int type, uint32_t id, const char *name, const char *tag)
{
if (dflag)
printf("Default %s disk quotas: %s\n",
ufs_quota_class_names[type], tag);
else
printf("Disk quotas for %s %s (%cid %u): %s\n",
ufs_quota_class_names[type], name,
*ufs_quota_class_names[type], id, tag);
if (!qflag && tag[0] == '\0') {
printf("%12s%9s %8s%9s%8s%8s %7s%8s%8s\n"
, "Filesystem"
, "blocks"
, "quota"
, "limit"
, "grace"
, "files"
, "quota"
, "limit"
, "grace"
);
}
}
/*
* Collect the requested quota information.
*/
static struct quotause *
getprivs(uint32_t id, int quotatype)
{
struct quotause *qup, *quptail;
struct quotause *quphead;
struct statvfs *fst;
int nfst, i;
int8_t version;
qup = quphead = quptail = NULL;
nfst = getmntinfo(&fst, MNT_WAIT);
if (nfst == 0)
errx(2, "no filesystems mounted!");
for (i = 0; i < nfst; i++) {
if (qup == NULL) {
if ((qup = malloc(sizeof *qup)) == NULL)
err(1, "out of memory");
}
if (strncmp(fst[i].f_fstypename, "nfs",
sizeof(fst[i].f_fstypename)) == 0) {
version = 0;
if (getnfsquota(fst[i].f_mntfromname,
qup->qe, id, ufs_quota_class_names[quotatype]) != 1)
continue;
} else if ((fst[i].f_flag & ST_QUOTA) != 0) {
if (getvfsquota(fst[i].f_mntonname, qup->qe, &version,
id, quotatype, dflag, Dflag) != 1)
continue;
} else
continue;
(void)strncpy(qup->fsname, fst[i].f_mntonname,
sizeof(qup->fsname) - 1);
if (version == 2)
qup->flags |= QUOTA2;
if (quphead == NULL)
quphead = qup;
else
quptail->next = qup;
quptail = qup;
quptail->next = 0;
qup = NULL;
}
free(qup);
return quphead;
}
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