Fix some WARNS6 regression that crept up in the last days.
[dragonfly.git] / libexec / rpc.rquotad / rquotad.c
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1/*
2 * by Manuel Bouyer (bouyer@ensta.fr)
3 *
4 * There is no copyright, you can use it as you want.
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5 *
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 $
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8 */
9
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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>
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32#include <rpc/rpc.h>
33#include <rpc/pmap_clnt.h>
34#include <rpcsvc/rquota.h>
35#include <arpa/inet.h>
36
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37static void cleanup(int);
38static void rquota_service(struct svc_req *request, SVCXPRT *transp);
39static void sendquota(struct svc_req *request, SVCXPRT *transp);
40static void initfs(void);
41static int getfsquota(long id, char *path, struct ufs_dqblk *dqblk);
42static int hasquota(struct fstab *fs, char **qfnamep);
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43
44/*
45 * structure containing informations about ufs filesystems
46 * initialised by initfs()
47 */
48struct 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;
54struct fs_stat *fs_begin = NULL;
55
56int from_inetd = 1;
57
58void
97659ac1 59cleanup(int signo __unused)
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60{
61 (void) pmap_unset(RQUOTAPROG, RQUOTAVERS);
62 exit(0);
63}
64
65int
97659ac1 66main(void)
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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
110void
97659ac1 111rquota_service(struct svc_req *request, SVCXPRT *transp)
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112{
113 switch (request->rq_proc) {
114 case NULLPROC:
5b0d3e5e 115 (void)svc_sendreply(transp, (xdrproc_t)xdr_void, (char *)NULL);
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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 */
132void
97659ac1 133sendquota(struct svc_req *request, SVCXPRT *transp)
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134{
135 struct getquota_args getq_args;
136 struct getquota_rslt getq_rslt;
286555ab 137 struct ufs_dqblk dqblk;
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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)) {
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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)) {
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174 svcerr_systemerr(transp);
175 }
5b0d3e5e 176 if (!svc_freeargs(transp, (xdrproc_t)xdr_getquota_args, (caddr_t)&getq_args)) {
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177 syslog(LOG_ERR, "unable to free arguments");
178 exit(1);
179 }
180}
181
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182/* initialise the fs_tab list from entries in /etc/fstab */
183void
97659ac1 184initfs(void)
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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 */
221int
97659ac1 222getfsquota(long id, char *path, struct ufs_dqblk *dqblk)
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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) {
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247 close(fd);
248 return (1);
249 }
286555ab 250 switch (read(fd, dqblk, sizeof(struct ufs_dqblk))) {
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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));
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257 ret = 1;
258 break;
286555ab 259 case sizeof(struct ufs_dqblk): /* OK */
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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 */
276int
97659ac1 277hasquota(struct fstab *fs, char **qfnamep)
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278{
279 static char initname, usrname[100];
280 static char buf[BUFSIZ];
281 char *opt, *cp;
97659ac1 282 const char *qfextension[] = INITQFNAMES;
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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}