--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Share Database of available printers.
+ Copyright (C) Simo Sorce 2010
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "dbwrap.h"
+#include "printer_list.h"
+
+#define PL_DB_NAME() lock_path("printer_list.tdb")
+#define PL_KEY_PREFIX "PRINTERLIST/PRN/"
+#define PL_KEY_FORMAT PL_KEY_PREFIX"%s"
+#define PL_TIMESTAMP_KEY "PRINTERLIST/GLOBAL/LAST_REFRESH"
+#define PL_DATA_FORMAT "ddPP"
+#define PL_TSTAMP_FORMAT "dd"
+
+static struct db_context *get_printer_list_db(void)
+{
+ static struct db_context *db;
+
+ if (db != NULL) {
+ return db;
+ }
+ db = db_open(talloc_autofree_context(), PL_DB_NAME(), 0,
+ TDB_DEFAULT|TDB_CLEAR_IF_FIRST,
+ O_RDWR|O_CREAT, 0644);
+ return db;
+}
+
+bool printer_list_parent_init(void)
+{
+ struct db_context *db;
+
+ /*
+ * Open the tdb in the parent process (smbd) so that our
+ * CLEAR_IF_FIRST optimization in tdb_reopen_all can properly
+ * work.
+ */
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ DEBUG(1, ("could not open Printer List Database: %s\n",
+ strerror(errno)));
+ return false;
+ }
+ return true;
+}
+
+NTSTATUS printer_list_get_printer(TALLOC_CTX *mem_ctx,
+ const char *name,
+ const char **comment,
+ time_t *last_refresh)
+{
+ struct db_context *db;
+ char *key;
+ TDB_DATA data;
+ uint32_t time_h, time_l;
+ char *nstr = NULL;
+ char *cstr = NULL;
+ NTSTATUS status;
+ int ret;
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ key = talloc_asprintf(mem_ctx, PL_KEY_FORMAT, name);
+ if (!key) {
+ DEBUG(0, ("Failed to allocate key name!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ data = dbwrap_fetch_bystring_upper(db, key, key);
+ if (data.dptr == NULL) {
+ DEBUG(1, ("Failed to fetch record!\n"));
+ status = NT_STATUS_NOT_FOUND;
+ goto done;
+ }
+
+ ret = tdb_unpack(data.dptr, data.dsize,
+ PL_DATA_FORMAT,
+ &time_h, &time_l, &nstr, &cstr);
+ if (ret == -1) {
+ DEBUG(1, ("Failed to un pack printer data"));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto done;
+ }
+
+ if (last_refresh) {
+ *last_refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
+ }
+
+ if (comment) {
+ *comment = talloc_strdup(mem_ctx, cstr);
+ if (!*comment) {
+ DEBUG(1, ("Failed to strdup comment!\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ }
+
+ status = NT_STATUS_OK;
+
+done:
+ SAFE_FREE(nstr);
+ SAFE_FREE(cstr);
+ TALLOC_FREE(key);
+ return status;
+}
+
+NTSTATUS printer_list_set_printer(TALLOC_CTX *mem_ctx,
+ const char *name,
+ const char *comment,
+ time_t last_refresh)
+{
+ struct db_context *db;
+ char *key;
+ TDB_DATA data;
+ uint64_t time_64;
+ uint32_t time_h, time_l;
+ const char *str = NULL;
+ NTSTATUS status;
+ int len;
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ key = talloc_asprintf(mem_ctx, PL_KEY_FORMAT, name);
+ if (!key) {
+ DEBUG(0, ("Failed to allocate key name!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (comment) {
+ str = comment;
+ } else {
+ str = "";
+ }
+
+ time_64 = last_refresh;
+ time_l = time_64 & 0xFFFFFFFFL;
+ time_h = time_64 >> 32;
+
+ len = tdb_pack(NULL, 0, PL_DATA_FORMAT, time_h, time_l, name, str);
+
+ data.dptr = talloc_array(key, uint8_t, len);
+ if (!data.dptr) {
+ DEBUG(0, ("Failed to allocate tdb data buffer!\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ data.dsize = len;
+
+ len = tdb_pack(data.dptr, data.dsize,
+ PL_DATA_FORMAT, time_h, time_l, name, str);
+
+ status = dbwrap_store_bystring_upper(db, key, data, TDB_REPLACE);
+
+done:
+ TALLOC_FREE(key);
+ return status;
+}
+
+NTSTATUS printer_list_get_last_refresh(time_t *last_refresh)
+{
+ struct db_context *db;
+ TDB_DATA data;
+ uint32_t time_h, time_l;
+ NTSTATUS status;
+ int ret;
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ ZERO_STRUCT(data);
+
+ data = dbwrap_fetch_bystring(db, talloc_tos(), PL_TIMESTAMP_KEY);
+ if (data.dptr == NULL) {
+ DEBUG(1, ("Failed to fetch record!\n"));
+ status = NT_STATUS_NOT_FOUND;
+ goto done;
+ }
+
+ ret = tdb_unpack(data.dptr, data.dsize,
+ PL_TSTAMP_FORMAT, &time_h, &time_l);
+ if (ret == -1) {
+ DEBUG(1, ("Failed to un pack printer data"));
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto done;
+ }
+
+ *last_refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
+ status = NT_STATUS_OK;
+
+done:
+ return status;
+}
+
+NTSTATUS printer_list_mark_reload(void)
+{
+ struct db_context *db;
+ TDB_DATA data;
+ uint32_t time_h, time_l;
+ time_t now = time(NULL);
+ NTSTATUS status;
+ int len;
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ time_l = ((uint64_t)now) & 0xFFFFFFFFL;
+ time_h = ((uint64_t)now) >> 32;
+
+ len = tdb_pack(NULL, 0, PL_TSTAMP_FORMAT, time_h, time_l);
+
+ data.dptr = talloc_array(talloc_tos(), uint8_t, len);
+ if (!data.dptr) {
+ DEBUG(0, ("Failed to allocate tdb data buffer!\n"));
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ data.dsize = len;
+
+ len = tdb_pack(data.dptr, data.dsize,
+ PL_TSTAMP_FORMAT, time_h, time_l);
+
+ status = dbwrap_store_bystring(db, PL_TIMESTAMP_KEY,
+ data, TDB_REPLACE);
+
+done:
+ TALLOC_FREE(data.dptr);
+ return status;
+}
+
+typedef int (printer_list_trv_fn_t)(struct db_record *, void *);
+
+static NTSTATUS printer_list_traverse(printer_list_trv_fn_t *fn,
+ void *private_data)
+{
+ struct db_context *db;
+ int ret;
+
+ db = get_printer_list_db();
+ if (db == NULL) {
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ ret = db->traverse(db, fn, private_data);
+ if (ret != 0) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ return NT_STATUS_OK;
+}
+
+struct printer_list_clean_state {
+ time_t last_refresh;
+ NTSTATUS status;
+};
+
+static int printer_list_clean_fn(struct db_record *rec, void *private_data)
+{
+ struct printer_list_clean_state *state =
+ (struct printer_list_clean_state *)private_data;
+ uint32_t time_h, time_l;
+ time_t refresh;
+ char *name;
+ char *comment;
+ int ret;
+
+ /* skip anything that does not contain PL_DATA_FORMAT data */
+ if (strncmp((char *)rec->key.dptr,
+ PL_KEY_PREFIX, sizeof(PL_KEY_PREFIX)-1)) {
+ return 0;
+ }
+
+ ret = tdb_unpack(rec->value.dptr, rec->value.dsize,
+ PL_DATA_FORMAT, &time_h, &time_l, &name, &comment);
+ if (ret == -1) {
+ DEBUG(1, ("Failed to un pack printer data"));
+ state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ return -1;
+ }
+
+ SAFE_FREE(name);
+ SAFE_FREE(comment);
+
+ refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
+
+ if (refresh < state->last_refresh) {
+ state->status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(state->status)) {
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+NTSTATUS printer_list_clean_old(void)
+{
+ struct printer_list_clean_state state;
+ NTSTATUS status;
+
+ status = printer_list_get_last_refresh(&state.last_refresh);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ state.status = NT_STATUS_OK;
+
+ status = printer_list_traverse(printer_list_clean_fn, &state);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL) &&
+ !NT_STATUS_IS_OK(state.status)) {
+ status = state.status;
+ }
+
+ return status;
+}
+
+struct printer_list_exec_state {
+ void (*fn)(const char *, const char *, void *);
+ void *private_data;
+ NTSTATUS status;
+};
+
+static int printer_list_exec_fn(struct db_record *rec, void *private_data)
+{
+ struct printer_list_exec_state *state =
+ (struct printer_list_exec_state *)private_data;
+ uint32_t time_h, time_l;
+ char *name;
+ char *comment;
+ int ret;
+
+ ret = tdb_unpack(rec->value.dptr, rec->value.dsize,
+ PL_DATA_FORMAT, &time_h, &time_l, &name, &comment);
+ if (ret == -1) {
+ DEBUG(1, ("Failed to un pack printer data"));
+ state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ return -1;
+ }
+
+ state->fn(name, comment, state->private_data);
+
+ SAFE_FREE(name);
+ SAFE_FREE(comment);
+ return 0;
+}
+
+NTSTATUS printer_list_run_fn(void (*fn)(const char *, const char *, void *),
+ void *private_data)
+{
+ struct printer_list_exec_state state;
+ NTSTATUS status;
+
+ state.fn = fn;
+ state.private_data = private_data;
+ state.status = NT_STATUS_OK;
+
+ status = printer_list_traverse(printer_list_exec_fn, &state);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL) &&
+ !NT_STATUS_IS_OK(state.status)) {
+ status = state.status;
+ }
+
+ return status;
+}
git.samba.org / ira / wip.git / commitdiff