[dragonfly.git] / libexec / rpc.rquotad / rquotad.c

/*
 * by Manuel Bouyer (bouyer@ensta.fr)
 * 
 * There is no copyright, you can use it as you want.
 *
 * $FreeBSD: src/libexec/rpc.rquotad/rquotad.c,v 1.3.2.1 2001/07/02 23:46:27 mikeh Exp $
 * $DragonFly: src/libexec/rpc.rquotad/rquotad.c,v 1.6 2008/11/19 18:41:30 swildner Exp $
 */

#include <sys/param.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <signal.h>

#include <ctype.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <syslog.h>
#include <varargs.h>

#include <vfs/ufs/quota.h>
#include <rpc/rpc.h>
#include <rpc/pmap_clnt.h>
#include <rpcsvc/rquota.h>
#include <arpa/inet.h>

static void cleanup(int);
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 ufs_dqblk *dqblk);
static int hasquota(struct fstab *fs, char **qfnamep);

/*
 * structure containing informations about ufs filesystems
 * initialised by initfs()
 */
struct fs_stat {
	struct fs_stat *fs_next;	/* next element */
	char   *fs_file;		/* mount point of the filesystem */
	char   *qfpathname;		/* pathname of the quota file */
	dev_t   st_dev;			/* device of the filesystem */
} fs_stat;
struct fs_stat *fs_begin = NULL;

int from_inetd = 1;

void 
cleanup(int signo __unused)
{
	(void) pmap_unset(RQUOTAPROG, RQUOTAVERS);
	exit(0);
}

int
main(void)
{
	SVCXPRT *transp;
	int sock = 0;
	int proto = 0;
	struct sockaddr_in from;
	int fromlen;

	fromlen = sizeof(from);
	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
		from_inetd = 0;
		sock = RPC_ANYSOCK;
		proto = IPPROTO_UDP;
	}

	if (!from_inetd) {
		daemon(0, 0);

		(void) pmap_unset(RQUOTAPROG, RQUOTAVERS);

		(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 */
	transp = svcudp_create(sock);
	if (transp == NULL) {
		syslog(LOG_ERR, "couldn't create udp service");
		exit(1);
	}
	if (!svc_register(transp, RQUOTAPROG, RQUOTAVERS, rquota_service, proto)) {
		syslog(LOG_ERR, "unable to register (RQUOTAPROG, RQUOTAVERS, %s)", proto?"udp":"(inetd)");
		exit(1);
	}

	initfs();		/* init the fs_stat list */
	svc_run();
	syslog(LOG_ERR, "svc_run returned");
	exit(1);
}

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 */
void 
sendquota(struct svc_req *request, SVCXPRT *transp)
{
	struct getquota_args getq_args;
	struct getquota_rslt getq_rslt;
	struct ufs_dqblk dqblk;
	struct timeval timev;

	bzero((char *)&getq_args, sizeof(getq_args));
	if (!svc_getargs(transp, (xdrproc_t)xdr_getquota_args, (caddr_t)&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;
		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize = DEV_BSIZE;
		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit =
		    dqblk.dqb_bhardlimit;
		getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit =
		    dqblk.dqb_bsoftlimit;
		getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks =
		    dqblk.dqb_curblocks;
		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, (char *)&getq_rslt)) {
		svcerr_systemerr(transp);
	}
	if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, (caddr_t)&getq_args)) {
		syslog(LOG_ERR, "unable to free arguments");
		exit(1);
	}
}

/* initialise the fs_tab list from entries in /etc/fstab */
void 
initfs(void)
{
	struct fs_stat *fs_current = NULL;
	struct fs_stat *fs_next = NULL;
	char *qfpathname;
	struct fstab *fs;
	struct stat st;

	setfsent();
	while ((fs = getfsent())) {
		if (strcmp(fs->fs_vfstype, "ufs"))
			continue;
		if (!hasquota(fs, &qfpathname))
			continue;

		fs_current = (struct fs_stat *) malloc(sizeof(struct fs_stat));
		fs_current->fs_next = fs_next;	/* next element */

		fs_current->fs_file = malloc(sizeof(char) * (strlen(fs->fs_file) + 1));
		strcpy(fs_current->fs_file, fs->fs_file);

		fs_current->qfpathname = malloc(sizeof(char) * (strlen(qfpathname) + 1));
		strcpy(fs_current->qfpathname, qfpathname);

		stat(fs_current->fs_file, &st);
		fs_current->st_dev = st.st_dev;

		fs_next = fs_current;
	}
	endfsent();
	fs_begin = fs_current;
}

/*
 * gets the quotas for id, filesystem path.
 * Return 0 if fail, 1 otherwise
 */
int
getfsquota(long id, char *path, struct ufs_dqblk *dqblk)
{
	struct stat st_path;
	struct fs_stat *fs;
	int	qcmd, fd, ret = 0;

	if (stat(path, &st_path) < 0)
		return (0);

	qcmd = QCMD(Q_GETQUOTA, USRQUOTA);

	for (fs = fs_begin; fs != NULL; fs = fs->fs_next) {
		/* where the devise is the same as path */
		if (fs->st_dev != st_path.st_dev)
			continue;

		/* find the specified filesystem. get and return quota */
		if (quotactl(fs->fs_file, qcmd, id, dqblk) == 0)
			return (1);

		if ((fd = open(fs->qfpathname, O_RDONLY)) < 0) {
			syslog(LOG_ERR, "open error: %s: %m", fs->qfpathname);
			return (0);
		}
		if (lseek(fd, (off_t)(id * sizeof(struct ufs_dqblk)), L_SET) == (off_t)-1) {
			close(fd);
			return (1);
		}
		switch (read(fd, dqblk, sizeof(struct ufs_dqblk))) {
		case 0:
			/*
                         * Convert implicit 0 quota (EOF)
                         * into an explicit one (zero'ed dqblk)
                         */
			bzero((caddr_t) dqblk, sizeof(struct ufs_dqblk));
			ret = 1;
			break;
		case sizeof(struct ufs_dqblk):	/* OK */
			ret = 1;
			break;
		default:	/* ERROR */
			syslog(LOG_ERR, "read error: %s: %m", fs->qfpathname);
			close(fd);
			return (0);
		}
		close(fd);
	}
	return (ret);
}

/*
 * Check to see if a particular quota is to be enabled.
 * Comes from quota.c, NetBSD 0.9
 */
int
hasquota(struct fstab *fs, char **qfnamep)
{
	static char initname, usrname[100];
	static char buf[BUFSIZ];
	char	*opt, *cp;
	const char *qfextension[] = INITQFNAMES;

	if (!initname) {
		sprintf(usrname, "%s%s", qfextension[USRQUOTA], QUOTAFILENAME);
		initname = 1;
	}
	strcpy(buf, fs->fs_mntops);
	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
		if ((cp = index(opt, '=')))
			*cp++ = '\0';
		if (strcmp(opt, usrname) == 0)
			break;
	}
	if (!opt)
		return (0);
	if (cp) {
		*qfnamep = cp;
		return (1);
	}
	sprintf(buf, "%s/%s.%s", fs->fs_file, QUOTAFILENAME, qfextension[USRQUOTA]);
	*qfnamep = buf;
	return (1);
}
Commit	Line	Data
984263bc MD	1	/*
	2	* by Manuel Bouyer (bouyer@ensta.fr)
	3	*
	4	* There is no copyright, you can use it as you want.
1de703da MD	5	*
1de703da MD	6	* $FreeBSD: src/libexec/rpc.rquotad/rquotad.c,v 1.3.2.1 2001/07/02 23:46:27 mikeh Exp $
97659ac1	7	* $DragonFly: src/libexec/rpc.rquotad/rquotad.c,v 1.6 2008/11/19 18:41:30 swildner Exp $
984263bc MD	8	*/
984263bc MD	9
984263bc MD	10	#include <sys/param.h>
	11	#include <sys/types.h>
	12	#include <sys/mount.h>
	13	#include <sys/file.h>
	14	#include <sys/stat.h>
	15	#include <sys/socket.h>
	16	#include <signal.h>
	17
	18	#include <ctype.h>
	19	#include <errno.h>
	20	#include <fstab.h>
	21	#include <grp.h>
	22	#include <pwd.h>
	23	#include <stdio.h>
	24	#include <stdlib.h>
	25	#include <string.h>
	26	#include <unistd.h>
	27
	28	#include <syslog.h>
	29	#include <varargs.h>
	30
38a690d7	31	#include <vfs/ufs/quota.h>
984263bc MD	32	#include <rpc/rpc.h>
	33	#include <rpc/pmap_clnt.h>
	34	#include <rpcsvc/rquota.h>
	35	#include <arpa/inet.h>
	36
97659ac1 SW	37	static void cleanup(int);
	38	static void rquota_service(struct svc_req request, SVCXPRT transp);
	39	static void sendquota(struct svc_req request, SVCXPRT transp);
	40	static void initfs(void);
	41	static int getfsquota(long id, char path, struct ufs_dqblk dqblk);
	42	static int hasquota(struct fstab fs, char *qfnamep);
984263bc MD	43
	44	/*
	45	* structure containing informations about ufs filesystems
	46	* initialised by initfs()
	47	*/
	48	struct fs_stat {
	49	struct fs_stat fs_next; / next element */
	50	char fs_file; / mount point of the filesystem */
	51	char qfpathname; / pathname of the quota file */
	52	dev_t st_dev; /* device of the filesystem */
	53	} fs_stat;
	54	struct fs_stat *fs_begin = NULL;
	55
	56	int from_inetd = 1;
	57
	58	void
97659ac1	59	cleanup(int signo __unused)
984263bc MD	60	{
	61	(void) pmap_unset(RQUOTAPROG, RQUOTAVERS);
	62	exit(0);
	63	}
	64
	65	int
97659ac1	66	main(void)
984263bc MD	67	{
	68	SVCXPRT *transp;
	69	int sock = 0;
	70	int proto = 0;
	71	struct sockaddr_in from;
	72	int fromlen;
	73
	74	fromlen = sizeof(from);
	75	if (getsockname(0, (struct sockaddr *)&from, &fromlen) < 0) {
	76	from_inetd = 0;
	77	sock = RPC_ANYSOCK;
	78	proto = IPPROTO_UDP;
	79	}
	80
	81	if (!from_inetd) {
	82	daemon(0, 0);
	83
	84	(void) pmap_unset(RQUOTAPROG, RQUOTAVERS);
	85
	86	(void) signal(SIGINT, cleanup);
	87	(void) signal(SIGTERM, cleanup);
	88	(void) signal(SIGHUP, cleanup);
	89	}
	90
	91	openlog("rpc.rquotad", LOG_CONS\|LOG_PID, LOG_DAEMON);
	92
	93	/* create and register the service */
	94	transp = svcudp_create(sock);
	95	if (transp == NULL) {
	96	syslog(LOG_ERR, "couldn't create udp service");
	97	exit(1);
	98	}
	99	if (!svc_register(transp, RQUOTAPROG, RQUOTAVERS, rquota_service, proto)) {
	100	syslog(LOG_ERR, "unable to register (RQUOTAPROG, RQUOTAVERS, %s)", proto?"udp":"(inetd)");
	101	exit(1);
	102	}
	103
	104	initfs(); /* init the fs_stat list */
	105	svc_run();
	106	syslog(LOG_ERR, "svc_run returned");
	107	exit(1);
	108	}
	109
	110	void
97659ac1	111	rquota_service(struct svc_req request, SVCXPRT transp)
984263bc MD	112	{
	113	switch (request->rq_proc) {
	114	case NULLPROC:
5b0d3e5e	115	(void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
984263bc MD	116	break;
	117
	118	case RQUOTAPROC_GETQUOTA:
	119	case RQUOTAPROC_GETACTIVEQUOTA:
	120	sendquota(request, transp);
	121	break;
	122
	123	default:
	124	svcerr_noproc(transp);
	125	break;
	126	}
	127	if (from_inetd)
	128	exit(0);
	129	}
	130
	131	/* read quota for the specified id, and send it */
	132	void
97659ac1	133	sendquota(struct svc_req request, SVCXPRT transp)
984263bc MD	134	{
	135	struct getquota_args getq_args;
	136	struct getquota_rslt getq_rslt;
286555ab	137	struct ufs_dqblk dqblk;
984263bc MD	138	struct timeval timev;
	139
	140	bzero((char *)&getq_args, sizeof(getq_args));
5b0d3e5e	141	if (!svc_getargs(transp, (xdrproc_t)xdr_getquota_args, (caddr_t)&getq_args)) {
984263bc MD	142	svcerr_decode(transp);
	143	return;
	144	}
	145	if (request->rq_cred.oa_flavor != AUTH_UNIX) {
	146	/* bad auth */
	147	getq_rslt.status = Q_EPERM;
	148	} else if (!getfsquota(getq_args.gqa_uid, getq_args.gqa_pathp, &dqblk)) {
	149	/* failed, return noquota */
	150	getq_rslt.status = Q_NOQUOTA;
	151	} else {
	152	gettimeofday(&timev, NULL);
	153	getq_rslt.status = Q_OK;
	154	getq_rslt.getquota_rslt_u.gqr_rquota.rq_active = TRUE;
	155	getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsize = DEV_BSIZE;
	156	getq_rslt.getquota_rslt_u.gqr_rquota.rq_bhardlimit =
	157	dqblk.dqb_bhardlimit;
	158	getq_rslt.getquota_rslt_u.gqr_rquota.rq_bsoftlimit =
	159	dqblk.dqb_bsoftlimit;
	160	getq_rslt.getquota_rslt_u.gqr_rquota.rq_curblocks =
	161	dqblk.dqb_curblocks;
	162	getq_rslt.getquota_rslt_u.gqr_rquota.rq_fhardlimit =
	163	dqblk.dqb_ihardlimit;
	164	getq_rslt.getquota_rslt_u.gqr_rquota.rq_fsoftlimit =
	165	dqblk.dqb_isoftlimit;
	166	getq_rslt.getquota_rslt_u.gqr_rquota.rq_curfiles =
	167	dqblk.dqb_curinodes;
	168	getq_rslt.getquota_rslt_u.gqr_rquota.rq_btimeleft =
	169	dqblk.dqb_btime - timev.tv_sec;
	170	getq_rslt.getquota_rslt_u.gqr_rquota.rq_ftimeleft =
	171	dqblk.dqb_itime - timev.tv_sec;
	172	}
5b0d3e5e	173	if (!svc_sendreply(transp, (xdrproc_t)xdr_getquota_rslt, (char *)&getq_rslt)) {
984263bc MD	174	svcerr_systemerr(transp);
984263bc MD	175	}
5b0d3e5e	176	if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, (caddr_t)&getq_args)) {
984263bc MD	177	syslog(LOG_ERR, "unable to free arguments");
	178	exit(1);
	179	}
	180	}
	181
984263bc MD	182	/* initialise the fs_tab list from entries in /etc/fstab */
984263bc MD	183	void
97659ac1	184	initfs(void)
984263bc MD	185	{
	186	struct fs_stat *fs_current = NULL;
	187	struct fs_stat *fs_next = NULL;
	188	char *qfpathname;
	189	struct fstab *fs;
	190	struct stat st;
	191
	192	setfsent();
	193	while ((fs = getfsent())) {
	194	if (strcmp(fs->fs_vfstype, "ufs"))
	195	continue;
	196	if (!hasquota(fs, &qfpathname))
	197	continue;
	198
	199	fs_current = (struct fs_stat *) malloc(sizeof(struct fs_stat));
	200	fs_current->fs_next = fs_next; /* next element */
	201
	202	fs_current->fs_file = malloc(sizeof(char) * (strlen(fs->fs_file) + 1));
	203	strcpy(fs_current->fs_file, fs->fs_file);
	204
	205	fs_current->qfpathname = malloc(sizeof(char) * (strlen(qfpathname) + 1));
	206	strcpy(fs_current->qfpathname, qfpathname);
	207
	208	stat(fs_current->fs_file, &st);
	209	fs_current->st_dev = st.st_dev;
	210
	211	fs_next = fs_current;
	212	}
	213	endfsent();
	214	fs_begin = fs_current;
	215	}
	216
	217	/*
	218	* gets the quotas for id, filesystem path.
	219	* Return 0 if fail, 1 otherwise
	220	*/
	221	int
97659ac1	222	getfsquota(long id, char path, struct ufs_dqblk dqblk)
984263bc MD	223	{
	224	struct stat st_path;
	225	struct fs_stat *fs;
	226	int qcmd, fd, ret = 0;
	227
	228	if (stat(path, &st_path) < 0)
	229	return (0);
	230
	231	qcmd = QCMD(Q_GETQUOTA, USRQUOTA);
	232
	233	for (fs = fs_begin; fs != NULL; fs = fs->fs_next) {
	234	/* where the devise is the same as path */
	235	if (fs->st_dev != st_path.st_dev)
	236	continue;
	237
	238	/* find the specified filesystem. get and return quota */
	239	if (quotactl(fs->fs_file, qcmd, id, dqblk) == 0)
	240	return (1);
	241
	242	if ((fd = open(fs->qfpathname, O_RDONLY)) < 0) {
	243	syslog(LOG_ERR, "open error: %s: %m", fs->qfpathname);
	244	return (0);
	245	}
286555ab	246	if (lseek(fd, (off_t)(id * sizeof(struct ufs_dqblk)), L_SET) == (off_t)-1) {
984263bc MD	247	close(fd);
	248	return (1);
	249	}
286555ab	250	switch (read(fd, dqblk, sizeof(struct ufs_dqblk))) {
984263bc MD	251	case 0:
	252	/*
	253	* Convert implicit 0 quota (EOF)
	254	* into an explicit one (zero'ed dqblk)
	255	*/
286555ab	256	bzero((caddr_t) dqblk, sizeof(struct ufs_dqblk));
984263bc MD	257	ret = 1;
984263bc MD	258	break;
286555ab	259	case sizeof(struct ufs_dqblk): /* OK */
984263bc MD	260	ret = 1;
	261	break;
	262	default: /* ERROR */
	263	syslog(LOG_ERR, "read error: %s: %m", fs->qfpathname);
	264	close(fd);
	265	return (0);
	266	}
	267	close(fd);
	268	}
	269	return (ret);
	270	}
	271
	272	/*
	273	* Check to see if a particular quota is to be enabled.
	274	* Comes from quota.c, NetBSD 0.9
	275	*/
	276	int
97659ac1	277	hasquota(struct fstab fs, char *qfnamep)
984263bc MD	278	{
	279	static char initname, usrname[100];
	280	static char buf[BUFSIZ];
	281	char opt, cp;
97659ac1	282	const char *qfextension[] = INITQFNAMES;
984263bc MD	283
	284	if (!initname) {
	285	sprintf(usrname, "%s%s", qfextension[USRQUOTA], QUOTAFILENAME);
	286	initname = 1;
	287	}
	288	strcpy(buf, fs->fs_mntops);
	289	for (opt = strtok(buf, ","); opt; opt = strtok(NULL, ",")) {
	290	if ((cp = index(opt, '=')))
	291	*cp++ = '\0';
	292	if (strcmp(opt, usrname) == 0)
	293	break;
	294	}
	295	if (!opt)
	296	return (0);
	297	if (cp) {
	298	*qfnamep = cp;
	299	return (1);
	300	}
	301	sprintf(buf, "%s/%s.%s", fs->fs_file, QUOTAFILENAME, qfextension[USRQUOTA]);
	302	*qfnamep = buf;
	303	return (1);
	304	}