2 * Copyright (c) 2003 the Netatalk Team
3 * Copyright (c) 2003 Rafal Lewczuk <rlewczuk@pronet.pl>
5 * This program is free software; you can redistribute and/or modify
6 * it under the terms of the GNU General Public License as published
7 * by the Free Software Foundation version 2 of the License or later
8 * version if explicitly stated by any of above copyright holders.
15 #endif /* HAVE_CONFIG_H */
17 #include <sys/types.h>
20 #include <sys/param.h>
28 #include <atalk/cnid.h>
29 #include <atalk/list.h>
30 #include <atalk/logger.h>
31 #include <atalk/util.h>
33 /* List of all registered modules. */
34 static struct list_head modules = ATALK_LIST_HEAD_INIT(modules);
36 static sigset_t sigblockset;
37 static const struct itimerval none = {{0, 0}, {0, 0}};
39 /* Registers new CNID backend module. */
41 /* Once module has been registered, it cannot be unregistered. */
42 void cnid_register(struct _cnid_module *module)
44 struct list_head *ptr;
46 /* Check if our module is already registered. */
47 list_for_each(ptr, &modules)
48 if (0 == strcmp(list_entry(ptr, cnid_module, db_list)->name, module->name)) {
49 LOG(log_error, logtype_afpd, "Module with name [%s] is already registered !", module->name);
53 LOG(log_info, logtype_afpd, "Registering CNID module [%s]", module->name);
54 ptr = &(module->db_list);
55 list_add_tail(ptr, &modules);
59 static int cnid_dir(const char *dir, mode_t mask)
64 if (stat(dir, &st) < 0) {
67 if (ad_stat( dir, &st) < 0)
70 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st.st_uid, st.st_gid);
71 if (setegid(st.st_gid) < 0 || seteuid(st.st_uid) < 0) {
72 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
76 if (mkdir(dir, 0777 & ~mask) < 0)
79 strlcpy(tmp, dir, sizeof(tmp));
80 strlcat(tmp, "/.AppleDB", sizeof(tmp));
81 if (stat(tmp, &st1) < 0) /* use .AppleDB owner, if folder already exists */
83 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st1.st_uid, st1.st_gid);
84 if (setegid(st1.st_gid) < 0 || seteuid(st1.st_uid) < 0) {
85 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
92 /* Opens CNID database using particular back-end */
93 struct _cnid_db *cnid_open(const char *volpath, mode_t mask, char *type, int flags,
94 const char *cnidsrv, const char *cnidport)
97 cnid_module *mod = NULL;
98 struct list_head *ptr;
102 list_for_each(ptr, &modules) {
103 if (0 == strcmp(list_entry(ptr, cnid_module, db_list)->name, type)) {
104 mod = list_entry(ptr, cnid_module, db_list);
110 LOG(log_error, logtype_afpd, "Cannot find module named [%s] in registered module list!", type);
114 if ((mod->flags & CNID_FLAG_SETUID) && !(flags & CNID_FLAG_MEMORY)) {
118 LOG(log_error, logtype_afpd, "seteuid failed %s", strerror(errno));
121 if (cnid_dir(volpath, mask) < 0) {
122 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
123 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
130 struct cnid_open_args args = {volpath, mask, flags, cnidsrv, cnidport};
131 db = mod->cnid_open(&args);
133 if ((mod->flags & CNID_FLAG_SETUID) && !(flags & CNID_FLAG_MEMORY)) {
135 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
136 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
142 LOG(log_error, logtype_afpd, "Cannot open CNID db at [%s].", volpath);
145 /* FIXME should module know about it ? */
146 if ((flags & CNID_FLAG_NODEV)) {
147 db->flags |= CNID_FLAG_NODEV;
149 db->flags |= mod->flags;
151 if ((db->flags & CNID_FLAG_BLOCK)) {
152 sigemptyset(&sigblockset);
153 sigaddset(&sigblockset, SIGTERM);
154 sigaddset(&sigblockset, SIGHUP);
155 sigaddset(&sigblockset, SIGUSR1);
156 sigaddset(&sigblockset, SIGUSR2);
157 sigaddset(&sigblockset, SIGALRM);
163 /* ------------------- */
164 static void block_signal( u_int32_t flags)
166 if ((flags & CNID_FLAG_BLOCK)) {
167 pthread_sigmask(SIG_BLOCK, &sigblockset, NULL);
171 /* ------------------- */
172 static void unblock_signal(u_int32_t flags)
174 if ((flags & CNID_FLAG_BLOCK)) {
175 pthread_sigmask(SIG_UNBLOCK, &sigblockset, NULL);
179 /* -------------------
180 protect against bogus value from the DB.
181 adddir really doesn't like 2
183 static cnid_t valide(cnid_t id)
185 if (id == CNID_INVALID)
188 if (id < CNID_START) {
192 LOG(log_error, logtype_afpd, "Error: Invalid cnid, corrupted DB?");
199 /* Closes CNID database. Currently it's just a wrapper around db->cnid_close(). */
200 void cnid_close(struct _cnid_db *db)
205 LOG(log_error, logtype_afpd, "Error: cnid_close called with NULL argument !");
208 /* cnid_close free db */
212 unblock_signal(flags);
215 /* --------------- */
216 cnid_t cnid_add(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
217 const char *name, const size_t len, cnid_t hint)
221 block_signal(cdb->flags);
222 ret = valide(cdb->cnid_add(cdb, st, did, name, len, hint));
223 unblock_signal(cdb->flags);
227 /* --------------- */
228 int cnid_delete(struct _cnid_db *cdb, cnid_t id)
232 block_signal(cdb->flags);
233 ret = cdb->cnid_delete(cdb, id);
234 unblock_signal(cdb->flags);
239 /* --------------- */
240 cnid_t cnid_get(struct _cnid_db *cdb, const cnid_t did, char *name,const size_t len)
244 block_signal(cdb->flags);
245 ret = valide(cdb->cnid_get(cdb, did, name, len));
246 unblock_signal(cdb->flags);
250 /* --------------- */
251 int cnid_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
256 if (!cdb->cnid_getstamp) {
257 memset(buffer, 0, len);
258 /* return the current time. it will invalide cache */
259 if (len < sizeof(time_t))
262 memcpy(buffer, &t, sizeof(time_t));
265 block_signal(cdb->flags);
266 ret = cdb->cnid_getstamp(cdb, buffer, len);
267 unblock_signal(cdb->flags);
271 /* --------------- */
272 cnid_t cnid_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
273 char *name, const size_t len)
277 block_signal(cdb->flags);
278 ret = valide(cdb->cnid_lookup(cdb, st, did, name, len));
279 unblock_signal(cdb->flags);
283 /* --------------- */
284 int cnid_find(struct _cnid_db *cdb, const char *name, size_t namelen, void *buffer, size_t buflen)
288 if (cdb->cnid_find == NULL) {
289 LOG(log_error, logtype_cnid, "cnid_find not supported by CNID backend");
293 block_signal(cdb->flags);
294 ret = cdb->cnid_find(cdb, name, namelen, buffer, buflen);
295 unblock_signal(cdb->flags);
299 /* --------------- */
300 char *cnid_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
304 block_signal(cdb->flags);
305 ret = cdb->cnid_resolve(cdb, id, buffer, len);
306 unblock_signal(cdb->flags);
307 if (ret && !strcmp(ret, "..")) {
308 LOG(log_error, logtype_afpd, "cnid_resolve: name is '..', corrupted db? ");
314 /* --------------- */
315 int cnid_update (struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
316 const cnid_t did, char *name, const size_t len)
320 block_signal(cdb->flags);
321 ret = cdb->cnid_update(cdb, id, st, did, name, len);
322 unblock_signal(cdb->flags);
326 /* --------------- */
327 cnid_t cnid_rebuild_add(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
328 char *name, const size_t len, cnid_t hint)
332 block_signal(cdb->flags);
333 ret = cdb->cnid_rebuild_add(cdb, st, did, name, len, hint);
334 unblock_signal(cdb->flags);