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/*
* by Manuel Bouyer (bouyer@ensta.fr)
*
* There is no copyright, you can use it as you want.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <ufs/ufs/quota.h>
#include <rpc/rpc.h>
#include <rpcsvc/rquota.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <ctype.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <libutil.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
static void rquota_service(struct svc_req *request, SVCXPRT *transp);
static void sendquota(struct svc_req *request, SVCXPRT *transp);
static void initfs(void);
static int getfsquota(long id, char *path, struct dqblk *dqblk);
static struct quotafile **qfa; /* array of qfs */
static int nqf, szqf; /* number of qfs and size of array */
static int from_inetd = 1;
static void
cleanup(int sig)
{
(void)sig;
(void)rpcb_unset(RQUOTAPROG, RQUOTAVERS, NULL);
exit(0);
}
int
main(void)
{
SVCXPRT *transp;
int ok;
struct sockaddr_storage from;
socklen_t fromlen;
fromlen = sizeof(from);
if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0)
from_inetd = 0;
if (!from_inetd) {
daemon(0, 0);
(void)rpcb_unset(RQUOTAPROG, RQUOTAVERS, NULL);
(void)signal(SIGINT, cleanup);
(void)signal(SIGTERM, cleanup);
(void)signal(SIGHUP, cleanup);
}
openlog("rpc.rquotad", LOG_CONS|LOG_PID, LOG_DAEMON);
/* create and register the service */
if (from_inetd) {
transp = svc_tli_create(0, NULL, NULL, 0, 0);
if (transp == NULL) {
syslog(LOG_ERR, "couldn't create udp service.");
exit(1);
}
ok = svc_reg(transp, RQUOTAPROG, RQUOTAVERS,
rquota_service, NULL);
} else {
ok = svc_create(rquota_service,
RQUOTAPROG, RQUOTAVERS, "udp");
}
if (!ok) {
syslog(LOG_ERR,
"unable to register (RQUOTAPROG, RQUOTAVERS, %s)",
from_inetd ? "(inetd)" : "udp");
exit(1);
}
initfs();
svc_run();
syslog(LOG_ERR, "svc_run returned");
exit(1);
}
static void
rquota_service(struct svc_req *request, SVCXPRT *transp)
{
switch (request->rq_proc) {
case NULLPROC:
(void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
break;
case RQUOTAPROC_GETQUOTA:
case RQUOTAPROC_GETACTIVEQUOTA:
sendquota(request, transp);
break;
default:
svcerr_noproc(transp);
break;
}
if (from_inetd)
exit(0);
}
/* read quota for the specified id, and send it */
static void
sendquota(struct svc_req *request, SVCXPRT *transp)
{
struct getquota_args getq_args;
struct getquota_rslt getq_rslt;
struct dqblk dqblk;
struct timeval timev;
int scale;
bzero(&getq_args, sizeof(getq_args));
if (!svc_getargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) {
svcerr_decode(transp);
return;
}
if (request->rq_cred.oa_flavor != AUTH_UNIX) {
/* bad auth */
getq_rslt.status = Q_EPERM;
} else if (!getfsquota(getq_args.gqa_uid, getq_args.gqa_pathp, &dqblk)) {
/* failed, return noquota */
getq_rslt.status = Q_NOQUOTA;
} else {
gettimeofday(&timev, NULL);
getq_rslt.status = Q_OK;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_active = TRUE;
scale = 1 << flsll(dqblk.dqb_bhardlimit >> 32);
getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize =
DEV_BSIZE * scale;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit =
dqblk.dqb_bhardlimit / scale;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit =
dqblk.dqb_bsoftlimit / scale;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks =
dqblk.dqb_curblocks / scale;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit =
dqblk.dqb_ihardlimit;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit =
dqblk.dqb_isoftlimit;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles =
dqblk.dqb_curinodes;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft =
dqblk.dqb_btime - timev.tv_sec;
getq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft =
dqblk.dqb_itime - timev.tv_sec;
}
if (!svc_sendreply(transp, (xdrproc_t)xdr_getquota_rslt, &getq_rslt))
svcerr_systemerr(transp);
if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, &getq_args)) {
syslog(LOG_ERR, "unable to free arguments");
exit(1);
}
}
static void
initfs(void)
{
struct fstab *fs;
setfsent();
szqf = 8;
if ((qfa = malloc(szqf * sizeof *qfa)) == NULL)
goto enomem;
while ((fs = getfsent())) {
if (strcmp(fs->fs_vfstype, "ufs"))
continue;
if (nqf >= szqf) {
szqf *= 2;
if ((qfa = reallocf(qfa, szqf * sizeof *qfa)) == NULL)
goto enomem;
}
if ((qfa[nqf] = quota_open(fs, USRQUOTA, O_RDONLY)) == NULL) {
if (errno != EOPNOTSUPP)
goto fserr;
continue;
}
++nqf;
/* XXX */
}
endfsent();
return;
enomem:
syslog(LOG_ERR, "out of memory");
exit(1);
fserr:
syslog(LOG_ERR, "%s: %s", fs->fs_file, strerror(errno));
exit(1);
}
/*
* gets the quotas for id, filesystem path.
* Return 0 if fail, 1 otherwise
*/
static int
getfsquota(long id, char *path, struct dqblk *dqblk)
{
int i;
for (i = 0; i < nqf; ++i)
if (quota_check_path(qfa[i], path) == 1)
return (quota_read(qfa[i], dqblk, id) == 0);
return (0);
}
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