NetBSD/usr.bin/quota/quota.c

748 lines
17 KiB
C

/* $NetBSD: quota.c,v 1.30 2004/09/07 13:20:40 jrf 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\n\
The Regents of the University of California. All rights reserved.\n");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)quota.c 8.4 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: quota.c,v 1.30 2004/09/07 13:20:40 jrf 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 <sys/queue.h>
#include <ufs/ufs/quota.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 <rpc/rpc.h>
#include <rpc/pmap_prot.h>
#include <rpcsvc/rquota.h>
char *qfname = QUOTAFILENAME;
char *qfextension[] = INITQFNAMES;
struct quotause {
struct quotause *next;
long flags;
struct dqblk dqblk;
char fsname[MAXPATHLEN + 1];
};
#define FOUND 0x01
int alldigits __P((char *));
int callaurpc __P((char *, int, int, int, xdrproc_t, void *,
xdrproc_t, void *));
int main __P((int, char **));
int getnfsquota __P((struct statvfs *, struct fstab *, struct quotause *,
long, int));
struct quotause *getprivs __P((long id, int quotatype));
int getufsquota __P((struct statvfs *, struct fstab *, struct quotause *,
long, int));
void heading __P((int, u_long, const char *, const char *));
void showgid __P((gid_t));
void showgrpname __P((const char *));
void showquotas __P((int, u_long, const char *));
void showuid __P((uid_t));
void showusrname __P((const char *));
char *timeprt __P((time_t seconds));
int ufshasquota __P((struct fstab *, int, char **));
void usage __P((void));
int qflag;
int vflag;
uid_t myuid;
int
main(argc, argv)
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, "ugvq")) != -1) {
switch(ch) {
case 'g':
gflag++;
break;
case 'u':
uflag++;
break;
case 'v':
vflag++;
break;
case 'q':
qflag++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!uflag && !gflag)
uflag++;
if (argc == 0) {
if (uflag)
showuid(myuid);
if (gflag) {
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]);
}
exit(0);
}
if (uflag && gflag)
usage();
if (uflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showuid(atoi(*argv));
else
showusrname(*argv);
}
exit(0);
}
if (gflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showgid(atoi(*argv));
else
showgrpname(*argv);
}
exit(0);
}
/* NOTREACHED */
return (0);
}
void
usage()
{
fprintf(stderr, "%s\n%s\n%s\n",
"usage: quota [-guqv]",
"\tquota [-qv] -u username ...",
"\tquota [-qv] -g groupname ...");
exit(1);
}
/*
* Print out quotas for a specified user identifier.
*/
void
showuid(uid)
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) {
printf("quota: %s (uid %d): permission denied\n", name, uid);
return;
}
showquotas(USRQUOTA, uid, name);
}
/*
* Print out quotas for a specified user name.
*/
void
showusrname(name)
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(USRQUOTA, pwd->pw_uid, name);
}
/*
* Print out quotas for a specified group identifier.
*/
void
showgid(gid)
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(GRPQUOTA, gid, name);
}
/*
* Print out quotas for a specified group name.
*/
void
showgrpname(name)
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(GRPQUOTA, grp->gr_gid, name);
}
void
showquotas(type, id, name)
int type;
u_long id;
const char *name;
{
struct quotause *qup;
struct quotause *quplist;
char *msgi, *msgb, *nam;
int lines = 0;
static time_t now;
if (now == 0)
time(&now);
quplist = getprivs(id, type);
for (qup = quplist; qup; qup = qup->next) {
if (!vflag &&
qup->dqblk.dqb_isoftlimit == 0 &&
qup->dqblk.dqb_ihardlimit == 0 &&
qup->dqblk.dqb_bsoftlimit == 0 &&
qup->dqblk.dqb_bhardlimit == 0)
continue;
msgi = (char *)0;
if (qup->dqblk.dqb_ihardlimit &&
qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_ihardlimit)
msgi = "File limit reached on";
else if (qup->dqblk.dqb_isoftlimit &&
qup->dqblk.dqb_curinodes >= qup->dqblk.dqb_isoftlimit) {
if (qup->dqblk.dqb_itime > now)
msgi = "In file grace period on";
else
msgi = "Over file quota on";
}
msgb = (char *)0;
if (qup->dqblk.dqb_bhardlimit &&
qup->dqblk.dqb_curblocks >= qup->dqblk.dqb_bhardlimit)
msgb = "Block limit reached on";
else {
if (qup->dqblk.dqb_bsoftlimit
&& qup->dqblk.dqb_curblocks
>= qup->dqblk.dqb_bsoftlimit) {
if (qup->dqblk.dqb_btime > now)
msgb = "In block grace period on";
else
msgb = "Over block quota on";
}
}
if (qflag) {
if ((msgi != (char *)0 || msgb != (char *)0) &&
lines++ == 0)
heading(type, id, name, "");
if (msgi != (char *)0)
printf("\t%s %s\n", msgi, qup->fsname);
if (msgb != (char *)0)
printf("\t%s %s\n", msgb, qup->fsname);
continue;
}
if (vflag ||
qup->dqblk.dqb_curblocks ||
qup->dqblk.dqb_curinodes) {
if (lines++ == 0)
heading(type, id, name, "");
nam = qup->fsname;
if (strlen(qup->fsname) > 15) {
printf("%s\n", qup->fsname);
nam = "";
}
printf("%12s%9d%c%8d%9d%8s"
, nam
, (int)(dbtob((u_quad_t)qup->dqblk.dqb_curblocks)
/ 1024)
, (msgb == (char *)0) ? ' ' : '*'
, (int)(dbtob((u_quad_t)qup->dqblk.dqb_bsoftlimit)
/ 1024)
, (int)(dbtob((u_quad_t)qup->dqblk.dqb_bhardlimit)
/ 1024)
, (msgb == (char *)0) ? ""
: timeprt(qup->dqblk.dqb_btime));
printf("%8d%c%7d%8d%8s\n"
, qup->dqblk.dqb_curinodes
, (msgi == (char *)0) ? ' ' : '*'
, qup->dqblk.dqb_isoftlimit
, qup->dqblk.dqb_ihardlimit
, (msgi == (char *)0) ? ""
: timeprt(qup->dqblk.dqb_itime)
);
continue;
}
}
if (!qflag && lines == 0)
heading(type, id, name, "none");
}
void
heading(type, id, name, tag)
int type;
u_long id;
const char *name, *tag;
{
printf("Disk quotas for %s %s (%cid %ld): %s\n", qfextension[type],
name, *qfextension[type], (u_long)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"
);
}
}
/*
* Calculate the grace period and return a printable string for it.
*/
char *
timeprt(seconds)
time_t seconds;
{
time_t hours, minutes;
static char buf[20];
static time_t now;
if (now == 0)
time(&now);
if (now > seconds)
return ("none");
seconds -= now;
minutes = (seconds + 30) / 60;
hours = (minutes + 30) / 60;
if (hours >= 36) {
(void)snprintf(buf, sizeof buf, "%ddays",
(int)((hours + 12) / 24));
return (buf);
}
if (minutes >= 60) {
(void)snprintf(buf, sizeof buf, "%2d:%d",
(int)(minutes / 60), (int)(minutes % 60));
return (buf);
}
(void)snprintf(buf, sizeof buf, "%2d", (int)minutes);
return (buf);
}
/*
* Collect the requested quota information.
*/
struct quotause *
getprivs(id, quotatype)
long id;
int quotatype;
{
struct quotause *qup, *quptail;
struct fstab *fs;
struct quotause *quphead;
struct statvfs *fst;
int nfst, i;
qup = quphead = quptail = NULL;
nfst = getmntinfo(&fst, MNT_WAIT);
if (nfst == 0)
errx(2, "no filesystems mounted!");
setfsent();
for (i = 0; i < nfst; i++) {
if (qup == NULL) {
if ((qup =
(struct quotause *)malloc(sizeof *qup)) == NULL)
errx(2, "out of memory");
}
if (strncmp(fst[i].f_fstypename, "nfs", MFSNAMELEN) == 0) {
if (getnfsquota(&fst[i], NULL, qup, id, quotatype) == 0)
continue;
} else if (strncmp(fst[i].f_fstypename, "ffs",
MFSNAMELEN) == 0) {
/*
* XXX
* UFS filesystems must be in /etc/fstab, and must
* indicate that they have quotas on (?!) This is quite
* unlike SunOS where quotas can be enabled/disabled
* on a filesystem independent of /etc/fstab, and it
* will still print quotas for them.
*/
if ((fs = getfsspec(fst[i].f_mntfromname)) == NULL)
continue;
if (getufsquota(&fst[i], fs, qup, id, quotatype) == 0)
continue;
} else
continue;
(void)strncpy(qup->fsname, fst[i].f_mntonname,
sizeof(qup->fsname) - 1);
if (quphead == NULL)
quphead = qup;
else
quptail->next = qup;
quptail = qup;
quptail->next = 0;
qup = NULL;
}
if (qup)
free(qup);
endfsent();
return (quphead);
}
/*
* Check to see if a particular quota is to be enabled.
*/
int
ufshasquota(fs, type, qfnamep)
struct fstab *fs;
int type;
char **qfnamep;
{
static char initname, usrname[100], grpname[100];
static char buf[BUFSIZ];
char *opt, *cp;
cp = NULL;
if (!initname) {
(void)snprintf(usrname, sizeof usrname, "%s%s",
qfextension[USRQUOTA], qfname);
(void)snprintf(grpname, sizeof grpname, "%s%s",
qfextension[GRPQUOTA], qfname);
initname = 1;
}
(void)strlcpy(buf, fs->fs_mntops, sizeof(buf));
for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
if ((cp = strchr(opt, '=')) != NULL)
*cp++ = '\0';
if (type == USRQUOTA && strcmp(opt, usrname) == 0)
break;
if (type == GRPQUOTA && strcmp(opt, grpname) == 0)
break;
}
if (!opt)
return (0);
if (cp) {
*qfnamep = cp;
return (1);
}
(void)snprintf(buf, sizeof buf, "%s/%s.%s", fs->fs_file, qfname,
qfextension[type]);
*qfnamep = buf;
return (1);
}
int
getufsquota(fst, fs, qup, id, quotatype)
struct statvfs *fst;
struct fstab *fs;
struct quotause *qup;
long id;
int quotatype;
{
char *qfpathname;
int fd, qcmd;
qcmd = QCMD(Q_GETQUOTA, quotatype);
if (!ufshasquota(fs, quotatype, &qfpathname))
return (0);
if (quotactl(fs->fs_file, qcmd, id, &qup->dqblk) != 0) {
if ((fd = open(qfpathname, O_RDONLY)) < 0) {
warn("%s", qfpathname);
return (0);
}
(void)lseek(fd, (off_t)(id * sizeof(struct dqblk)), SEEK_SET);
switch (read(fd, &qup->dqblk, sizeof(struct dqblk))) {
case 0: /* EOF */
/*
* Convert implicit 0 quota (EOF)
* into an explicit one (zero'ed dqblk)
*/
memset((caddr_t)&qup->dqblk, 0, sizeof(struct dqblk));
break;
case sizeof(struct dqblk): /* OK */
break;
default: /* ERROR */
warn("read error `%s'", qfpathname);
close(fd);
return (0);
}
close(fd);
}
return (1);
}
int
getnfsquota(fst, fs, qup, id, quotatype)
struct statvfs *fst;
struct fstab *fs;
struct quotause *qup;
long id;
int quotatype;
{
struct getquota_args gq_args;
struct ext_getquota_args ext_gq_args;
struct getquota_rslt gq_rslt;
struct dqblk *dqp = &qup->dqblk;
struct timeval tv;
char *cp;
int ret;
if (fst->f_flag & MNT_LOCAL)
return (0);
/*
* must be some form of "hostname:/path"
*/
cp = strchr(fst->f_mntfromname, ':');
if (cp == NULL) {
warnx("cannot find hostname for %s", fst->f_mntfromname);
return (0);
}
*cp = '\0';
if (*(cp+1) != '/') {
*cp = ':';
return (0);
}
ext_gq_args.gqa_pathp = cp + 1;
ext_gq_args.gqa_id = id;
ext_gq_args.gqa_type =
(quotatype == USRQUOTA) ? RQUOTA_USRQUOTA : RQUOTA_GRPQUOTA;
ret = callaurpc(fst->f_mntfromname, RQUOTAPROG, EXT_RQUOTAVERS,
RQUOTAPROC_GETQUOTA, xdr_ext_getquota_args, &ext_gq_args,
xdr_getquota_rslt, &gq_rslt);
if (ret == RPC_PROGVERSMISMATCH) {
if (quotatype != USRQUOTA) {
*cp = ':';
return (0);
}
/* try RQUOTAVERS */
gq_args.gqa_pathp = cp + 1;
gq_args.gqa_uid = id;
ret = callaurpc(fst->f_mntfromname, RQUOTAPROG, RQUOTAVERS,
RQUOTAPROC_GETQUOTA, xdr_getquota_args, &gq_args,
xdr_getquota_rslt, &gq_rslt);
}
if (ret != RPC_SUCCESS) {
*cp = ':';
return (0);
}
switch (gq_rslt.status) {
case Q_NOQUOTA:
break;
case Q_EPERM:
warnx("quota permission error, host: %s", fst->f_mntfromname);
break;
case Q_OK:
gettimeofday(&tv, NULL);
/* blocks*/
dqp->dqb_bhardlimit =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit *
(gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
dqp->dqb_bsoftlimit =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit *
(gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
dqp->dqb_curblocks =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks *
(gq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize / DEV_BSIZE);
/* inodes */
dqp->dqb_ihardlimit =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit;
dqp->dqb_isoftlimit =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit;
dqp->dqb_curinodes =
gq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles;
/* grace times */
dqp->dqb_btime =
tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft;
dqp->dqb_itime =
tv.tv_sec + gq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft;
*cp = ':';
return (1);
default:
warnx("bad rpc result, host: %s", fst->f_mntfromname);
break;
}
*cp = ':';
return (0);
}
int
callaurpc(host, prognum, versnum, procnum, inproc, in, outproc, out)
char *host;
int prognum, versnum, procnum;
xdrproc_t inproc;
void *in;
xdrproc_t outproc;
void *out;
{
struct sockaddr_in server_addr;
enum clnt_stat clnt_stat;
struct hostent *hp;
struct timeval timeout, tottimeout;
CLIENT *client = NULL;
int socket = RPC_ANYSOCK;
if ((hp = gethostbyname(host)) == NULL)
return ((int) RPC_UNKNOWNHOST);
timeout.tv_usec = 0;
timeout.tv_sec = 6;
memmove(&server_addr.sin_addr, hp->h_addr, hp->h_length);
server_addr.sin_family = AF_INET;
server_addr.sin_port = 0;
if ((client = clntudp_create(&server_addr, prognum,
versnum, timeout, &socket)) == NULL)
return ((int) rpc_createerr.cf_stat);
client->cl_auth = authunix_create_default();
tottimeout.tv_sec = 25;
tottimeout.tv_usec = 0;
clnt_stat = clnt_call(client, procnum, inproc, in,
outproc, out, tottimeout);
return ((int) clnt_stat);
}
int
alldigits(s)
char *s;
{
int c;
c = *s++;
do {
if (!isdigit(c))
return (0);
} while ((c = *s++) != 0);
return (1);
}