2 * $Id: cnid.c,v 1.1.4.1 2003-09-09 16:42:21 didg Exp $
4 * Copyright (c) 2003 the Netatalk Team
5 * Copyright (c) 2003 Rafal Lewczuk <rlewczuk@pronet.pl>
7 * This program is free software; you can redistribute and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation version 2 of the License or later
10 * version if explicitly stated by any of above copyright holders.
17 #endif /* HAVE_CONFIG_H */
19 #include <sys/types.h>
26 #include <atalk/cnid.h>
27 #include <atalk/list.h>
28 #include <atalk/logger.h>
32 /* List of all registered modules. */
33 static struct list_head modules = LIST_HEAD_INIT(modules);
35 static sigset_t sigblockset;
36 static const struct itimerval none = {{0, 0}, {0, 0}};
37 static struct itimerval savetimer;
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)
63 if (stat(dir, &st) < 0) {
66 if (ad_stat( dir, &st) < 0)
69 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st.st_uid, st.st_gid);
70 if (setegid(st.st_gid) < 0 || seteuid(st.st_uid) < 0) {
71 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
75 if (mkdir(dir, 0777 & ~mask) < 0)
78 LOG(log_info, logtype_cnid, "Setting uid/gid to %d/%d", st.st_uid, st.st_gid);
79 if (setegid(st.st_gid) < 0 || seteuid(st.st_uid) < 0) {
80 LOG(log_error, logtype_cnid, "uid/gid: %s", strerror(errno));
87 /* Opens CNID database using particular back-end */
88 struct _cnid_db *cnid_open(const char *volpath, mode_t mask, char *type)
91 cnid_module *mod = NULL;
92 struct list_head *ptr;
96 list_for_each(ptr, &modules) {
97 if (0 == strcmp(list_entry(ptr, cnid_module, db_list)->name, type)) {
98 mod = list_entry(ptr, cnid_module, db_list);
104 LOG(log_error, logtype_afpd, "Cannot find module named [%s] in registered module list!", type);
107 if ((mod->flags & CNID_FLAG_SETUID)) {
111 LOG(log_error, logtype_afpd, "seteuid failed %s", strerror(errno));
114 if (cnid_dir(volpath, mask) < 0) {
115 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
116 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
123 db = mod->cnid_open(volpath, mask);
125 if ((mod->flags & CNID_FLAG_SETUID)) {
127 if ( setegid(gid) < 0 || seteuid(uid) < 0) {
128 LOG(log_error, logtype_afpd, "can't seteuid back %s", strerror(errno));
134 LOG(log_error, logtype_afpd, "Cannot open CNID db at [%s].", volpath);
137 db->flags |= mod->flags;
139 if (db->flags |= CNID_FLAG_BLOCK) {
140 sigemptyset(&sigblockset);
141 sigaddset(&sigblockset, SIGTERM);
142 sigaddset(&sigblockset, SIGHUP);
143 sigaddset(&sigblockset, SIGUSR1);
144 sigaddset(&sigblockset, SIGALRM);
150 /* ------------------- */
151 static void block_signal(struct _cnid_db *db)
153 if ((db->flags & CNID_FLAG_BLOCK)) {
154 sigprocmask(SIG_BLOCK, &sigblockset, NULL);
155 setitimer(ITIMER_REAL, &none, &savetimer);
159 /* ------------------- */
160 static void unblock_signal(struct _cnid_db *db)
162 if ((db->flags & CNID_FLAG_BLOCK)) {
163 setitimer(ITIMER_REAL, &savetimer, NULL);
164 sigprocmask(SIG_UNBLOCK, &sigblockset, NULL);
168 /* Closes CNID database. Currently it's just a wrapper around db->cnid_close(). */
169 void cnid_close(struct _cnid_db *db)
172 LOG(log_error, logtype_afpd, "Error: cnid_close called with NULL argument !");
180 /* --------------- */
181 cnid_t cnid_add(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
182 const char *name, const int len, cnid_t hint)
187 ret = cdb->cnid_add(cdb, st, did, name, len, hint);
192 /* --------------- */
193 int cnid_delete(struct _cnid_db *cdb, cnid_t id)
198 ret = cdb->cnid_delete(cdb, id);
204 /* --------------- */
205 cnid_t cnid_get(struct _cnid_db *cdb, const cnid_t did, const char *name,const int len)
210 ret = cdb->cnid_get(cdb, did, name, len);
215 /* --------------- */
216 cnid_t cnid_getstamp(struct _cnid_db *cdb, void *buffer, const int len)
220 if (!cdb->cnid_getstamp) {
224 ret = cdb->cnid_getstamp(cdb, buffer, len);
229 /* --------------- */
230 cnid_t cnid_lookup(struct _cnid_db *cdb, const struct stat *st, const cnid_t did,
231 const char *name, const int len)
236 ret = cdb->cnid_lookup(cdb, st, did, name, len);
241 /* --------------- */
242 char *cnid_resolve(struct _cnid_db *cdb, cnid_t *id, void *buffer, u_int32_t len)
247 ret = cdb->cnid_resolve(cdb, id, buffer, len);
252 /* --------------- */
253 int cnid_update (struct _cnid_db *cdb, const cnid_t id, const struct stat *st,
254 const cnid_t did, const char *name, const int len)
259 ret = cdb->cnid_update(cdb, id, st, did, name, len);