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>
32 #include <atalk/compat.h>
34 /* List of all registered modules. */
35 static struct list_head modules = ATALK_LIST_HEAD_INIT(modules);
37 static sigset_t sigblockset;
38 static const struct itimerval none = {{0, 0}, {0, 0}};
40 /* Registers new CNID backend module. */
42 /* Once module has been registered, it cannot be unregistered. */
43 void cnid_register(struct _cnid_module *module)
45 struct list_head *ptr;
47 /* Check if our module is already registered. */
48 list_for_each(ptr, &modules)
49 if (0 == strcmp(list_entry(ptr, cnid_module, db_list)->name, module->name)) {
50 LOG(log_error, logtype_afpd, "Module with name [%s] is already registered !", module->name);
54 LOG(log_info, logtype_afpd, "Registering CNID module [%s]", module->name);
55 ptr = &(module->db_list);
56 list_add_tail(ptr, &modules);
60 static int cnid_dir(const char *dir, mode_t mask)
65 if (stat(dir, &st) < 0) {
68 if (ad_stat( dir, &st) < 0)
71 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st.st_uid, st.st_gid);
72 if (setegid(st.st_gid) < 0 || seteuid(st.st_uid) < 0) {
73 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
77 if (mkdir(dir, 0777 & ~mask) < 0)
80 strlcpy(tmp, dir, sizeof(tmp));
81 strlcat(tmp, "/.AppleDB", sizeof(tmp));
82 if (stat(tmp, &st1) < 0) /* use .AppleDB owner, if folder already exists */
84 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st1.st_uid, st1.st_gid);
85 if (setegid(st1.st_gid) < 0 || seteuid(st1.st_uid) < 0) {
86 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
93 /* Opens CNID database using particular back-end */
94 struct _cnid_db *cnid_open(const char *volpath, mode_t mask, char *type, int flags,
95 const char *cnidsrv, const char *cnidport)
98 cnid_module *mod = NULL;
99 struct list_head *ptr;
103 list_for_each(ptr, &modules) {
104 if (0 == strcmp(list_entry(ptr, cnid_module, db_list)->name, type)) {
105 mod = list_entry(ptr, cnid_module, db_list);
111 LOG(log_error, logtype_afpd, "Cannot find module named [%s] in registered module list!", type);
115 if ((mod->flags & CNID_FLAG_SETUID) && !(flags & CNID_FLAG_MEMORY)) {
119 LOG(log_error, logtype_afpd, "seteuid failed %s", strerror(errno));
122 if (cnid_dir(volpath, mask) < 0) {
123 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
124 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
131 struct cnid_open_args args = {volpath, mask, flags, cnidsrv, cnidport};
132 db = mod->cnid_open(&args);
134 if ((mod->flags & CNID_FLAG_SETUID) && !(flags & CNID_FLAG_MEMORY)) {
136 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
137 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
143 LOG(log_error, logtype_afpd, "Cannot open CNID db at [%s].", volpath);
146 /* FIXME should module know about it ? */
147 if ((flags & CNID_FLAG_NODEV)) {
148 db->flags |= CNID_FLAG_NODEV;
150 db->flags |= mod->flags;
152 if ((db->flags & CNID_FLAG_BLOCK)) {
153 sigemptyset(&sigblockset);
154 sigaddset(&sigblockset, SIGTERM);
155 sigaddset(&sigblockset, SIGHUP);
156 sigaddset(&sigblockset, SIGUSR1);
157 sigaddset(&sigblockset, SIGUSR2);
158 sigaddset(&sigblockset, SIGALRM);
164 /* ------------------- */
165 static void block_signal( u_int32_t flags)
167 if ((flags & CNID_FLAG_BLOCK)) {
168 pthread_sigmask(SIG_BLOCK, &sigblockset, NULL);
172 /* ------------------- */
173 static void unblock_signal(u_int32_t flags)
175 if ((flags & CNID_FLAG_BLOCK)) {
176 pthread_sigmask(SIG_UNBLOCK, &sigblockset, NULL);
180 /* -------------------
181 protect against bogus value from the DB.
182 adddir really doesn't like 2
184 static cnid_t valide(cnid_t id)
186 if (id == CNID_INVALID)
189 if (id < CNID_START) {
193 LOG(log_error, logtype_afpd, "Error: Invalid cnid, corrupted DB?");
200 /* Closes CNID database. Currently it's just a wrapper around db->cnid_close(). */
201 void cnid_close(struct _cnid_db *db)
206 LOG(log_error, logtype_afpd, "Error: cnid_close called with NULL argument !");
209 /* cnid_close free db */
213 unblock_signal(flags);
216 /* --------------- */
217 cnid_t cnid_add(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
218 const char *name, const size_t len, cnid_t hint)
222 block_signal(cdb->flags);
223 ret = valide(cdb->cnid_add(cdb, st, did, name, len, hint));
224 unblock_signal(cdb->flags);
228 /* --------------- */
229 int cnid_delete(struct _cnid_db *cdb, cnid_t id)
233 block_signal(cdb->flags);
234 ret = cdb->cnid_delete(cdb, id);
235 unblock_signal(cdb->flags);
240 /* --------------- */
241 cnid_t cnid_get(struct _cnid_db *cdb, const cnid_t did, char *name,const size_t len)
245 block_signal(cdb->flags);
246 ret = valide(cdb->cnid_get(cdb, did, name, len));
247 unblock_signal(cdb->flags);
251 /* --------------- */
252 int cnid_getstamp(struct _cnid_db *cdb, void *buffer, const size_t len)
257 if (!cdb->cnid_getstamp) {
258 memset(buffer, 0, len);
259 /* return the current time. it will invalide cache */
260 if (len < sizeof(time_t))
263 memcpy(buffer, &t, sizeof(time_t));
266 block_signal(cdb->flags);
267 ret = cdb->cnid_getstamp(cdb, buffer, len);
268 unblock_signal(cdb->flags);
272 /* --------------- */
273 cnid_t cnid_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
274 char *name, const size_t len)
278 block_signal(cdb->flags);
279 ret = valide(cdb->cnid_lookup(cdb, st, did, name, len));
280 unblock_signal(cdb->flags);
284 /* --------------- */
285 int cnid_find(struct _cnid_db *cdb, const char *name, size_t namelen, void *buffer, size_t buflen)
289 if (cdb->cnid_find == NULL) {
290 LOG(log_error, logtype_cnid, "cnid_find not supported by CNID backend");
294 block_signal(cdb->flags);
295 ret = cdb->cnid_find(cdb, name, namelen, buffer, buflen);
296 unblock_signal(cdb->flags);
300 /* --------------- */
301 char *cnid_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, size_t len)
305 block_signal(cdb->flags);
306 ret = cdb->cnid_resolve(cdb, id, buffer, len);
307 unblock_signal(cdb->flags);
308 if (ret && !strcmp(ret, "..")) {
309 LOG(log_error, logtype_afpd, "cnid_resolve: name is '..', corrupted db? ");
315 /* --------------- */
316 int cnid_update (struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
317 const cnid_t did, char *name, const size_t len)
321 block_signal(cdb->flags);
322 ret = cdb->cnid_update(cdb, id, st, did, name, len);
323 unblock_signal(cdb->flags);
327 /* --------------- */
328 cnid_t cnid_rebuild_add(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
329 char *name, const size_t len, cnid_t hint)
333 block_signal(cdb->flags);
334 ret = cdb->cnid_rebuild_add(cdb, st, did, name, len, hint);
335 unblock_signal(cdb->flags);