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