mirror of
https://github.com/samba-team/samba.git
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s3-printing: Added a printer list database.
Signed-off-by: Andreas Schneider <asn@cynapses.org>
This commit is contained in:
Simo Sorce
Andreas Schneider
parent
c35629cbb2
commit
d2a027ea94
@ -906,7 +906,8 @@ SMBD_OBJ_BASE = $(PARAM_WITHOUT_REG_OBJ) $(SMBD_OBJ_SRV) $(LIBSMB_OBJ) \
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PRINTING_OBJ = printing/pcap.o printing/print_svid.o printing/print_aix.o \
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printing/print_cups.o printing/print_generic.o \
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printing/lpq_parse.o printing/load.o \
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printing/print_iprint.o printing/print_standard.o
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printing/print_iprint.o printing/print_standard.o \
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printing/printer_list.o
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PRINTBASE_OBJ = printing/notify.o printing/printing_db.o
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PRINTBACKEND_OBJ = printing/printing.o \
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389
source3/printing/printer_list.c
Normal file
389
source3/printing/printer_list.c
Normal file
@ -0,0 +1,389 @@
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/*
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Unix SMB/CIFS implementation.
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Share Database of available printers.
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Copyright (C) Simo Sorce 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "dbwrap.h"
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#include "printer_list.h"
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#define PL_DB_NAME() lock_path("printer_list.tdb")
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#define PL_KEY_PREFIX "PRINTERLIST/PRN/"
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#define PL_KEY_FORMAT PL_KEY_PREFIX"%s"
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#define PL_TIMESTAMP_KEY "PRINTERLIST/GLOBAL/LAST_REFRESH"
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#define PL_DATA_FORMAT "ddPP"
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#define PL_TSTAMP_FORMAT "dd"
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static struct db_context *get_printer_list_db(void)
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{
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static struct db_context *db;
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if (db != NULL) {
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return db;
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}
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db = db_open(talloc_autofree_context(), PL_DB_NAME(), 0,
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TDB_DEFAULT|TDB_CLEAR_IF_FIRST,
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O_RDWR|O_CREAT, 0644);
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return db;
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}
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bool printer_list_parent_init(void)
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{
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struct db_context *db;
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/*
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* Open the tdb in the parent process (smbd) so that our
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* CLEAR_IF_FIRST optimization in tdb_reopen_all can properly
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* work.
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*/
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db = get_printer_list_db();
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if (db == NULL) {
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DEBUG(1, ("could not open Printer List Database: %s\n",
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strerror(errno)));
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return false;
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}
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return true;
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}
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NTSTATUS printer_list_get_printer(TALLOC_CTX *mem_ctx,
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const char *name,
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const char **comment,
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time_t *last_refresh)
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{
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struct db_context *db;
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char *key;
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TDB_DATA data;
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uint32_t time_h, time_l;
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char *nstr = NULL;
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char *cstr = NULL;
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NTSTATUS status;
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int ret;
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db = get_printer_list_db();
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if (db == NULL) {
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return NT_STATUS_INTERNAL_DB_CORRUPTION;
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}
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key = talloc_asprintf(mem_ctx, PL_KEY_FORMAT, name);
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if (!key) {
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DEBUG(0, ("Failed to allocate key name!\n"));
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return NT_STATUS_NO_MEMORY;
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}
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data = dbwrap_fetch_bystring_upper(db, key, key);
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if (data.dptr == NULL) {
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DEBUG(1, ("Failed to fetch record!\n"));
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status = NT_STATUS_NOT_FOUND;
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goto done;
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}
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ret = tdb_unpack(data.dptr, data.dsize,
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PL_DATA_FORMAT,
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&time_h, &time_l, &nstr, &cstr);
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if (ret == -1) {
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DEBUG(1, ("Failed to un pack printer data"));
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status = NT_STATUS_INTERNAL_DB_CORRUPTION;
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goto done;
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}
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if (last_refresh) {
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*last_refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
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}
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if (comment) {
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*comment = talloc_strdup(mem_ctx, cstr);
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if (!*comment) {
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DEBUG(1, ("Failed to strdup comment!\n"));
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status = NT_STATUS_NO_MEMORY;
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goto done;
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}
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}
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status = NT_STATUS_OK;
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done:
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SAFE_FREE(nstr);
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SAFE_FREE(cstr);
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TALLOC_FREE(key);
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return status;
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}
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NTSTATUS printer_list_set_printer(TALLOC_CTX *mem_ctx,
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const char *name,
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const char *comment,
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time_t last_refresh)
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{
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struct db_context *db;
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char *key;
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TDB_DATA data;
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uint64_t time_64;
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uint32_t time_h, time_l;
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const char *str = NULL;
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NTSTATUS status;
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int len;
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db = get_printer_list_db();
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if (db == NULL) {
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return NT_STATUS_INTERNAL_DB_CORRUPTION;
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}
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key = talloc_asprintf(mem_ctx, PL_KEY_FORMAT, name);
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if (!key) {
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DEBUG(0, ("Failed to allocate key name!\n"));
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return NT_STATUS_NO_MEMORY;
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}
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if (comment) {
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str = comment;
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} else {
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str = "";
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}
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time_64 = last_refresh;
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time_l = time_64 & 0xFFFFFFFFL;
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time_h = time_64 >> 32;
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len = tdb_pack(NULL, 0, PL_DATA_FORMAT, time_h, time_l, name, str);
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data.dptr = talloc_array(key, uint8_t, len);
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if (!data.dptr) {
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DEBUG(0, ("Failed to allocate tdb data buffer!\n"));
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status = NT_STATUS_NO_MEMORY;
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goto done;
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}
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data.dsize = len;
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len = tdb_pack(data.dptr, data.dsize,
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PL_DATA_FORMAT, time_h, time_l, name, str);
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status = dbwrap_store_bystring_upper(db, key, data, TDB_REPLACE);
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done:
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TALLOC_FREE(key);
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return status;
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}
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NTSTATUS printer_list_get_last_refresh(time_t *last_refresh)
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{
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struct db_context *db;
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TDB_DATA data;
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uint32_t time_h, time_l;
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NTSTATUS status;
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int ret;
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db = get_printer_list_db();
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if (db == NULL) {
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return NT_STATUS_INTERNAL_DB_CORRUPTION;
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}
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ZERO_STRUCT(data);
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data = dbwrap_fetch_bystring(db, talloc_tos(), PL_TIMESTAMP_KEY);
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if (data.dptr == NULL) {
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DEBUG(1, ("Failed to fetch record!\n"));
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status = NT_STATUS_NOT_FOUND;
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goto done;
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}
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ret = tdb_unpack(data.dptr, data.dsize,
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PL_TSTAMP_FORMAT, &time_h, &time_l);
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if (ret == -1) {
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DEBUG(1, ("Failed to un pack printer data"));
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status = NT_STATUS_INTERNAL_DB_CORRUPTION;
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goto done;
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}
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*last_refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
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status = NT_STATUS_OK;
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done:
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return status;
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}
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NTSTATUS printer_list_mark_reload(void)
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{
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struct db_context *db;
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TDB_DATA data;
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uint32_t time_h, time_l;
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time_t now = time(NULL);
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NTSTATUS status;
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int len;
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db = get_printer_list_db();
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if (db == NULL) {
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return NT_STATUS_INTERNAL_DB_CORRUPTION;
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}
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time_l = ((uint64_t)now) & 0xFFFFFFFFL;
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time_h = ((uint64_t)now) >> 32;
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len = tdb_pack(NULL, 0, PL_TSTAMP_FORMAT, time_h, time_l);
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data.dptr = talloc_array(talloc_tos(), uint8_t, len);
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if (!data.dptr) {
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DEBUG(0, ("Failed to allocate tdb data buffer!\n"));
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status = NT_STATUS_NO_MEMORY;
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goto done;
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}
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data.dsize = len;
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len = tdb_pack(data.dptr, data.dsize,
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PL_TSTAMP_FORMAT, time_h, time_l);
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status = dbwrap_store_bystring(db, PL_TIMESTAMP_KEY,
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data, TDB_REPLACE);
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done:
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TALLOC_FREE(data.dptr);
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return status;
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}
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typedef int (printer_list_trv_fn_t)(struct db_record *, void *);
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static NTSTATUS printer_list_traverse(printer_list_trv_fn_t *fn,
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void *private_data)
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{
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struct db_context *db;
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int ret;
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db = get_printer_list_db();
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if (db == NULL) {
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return NT_STATUS_INTERNAL_DB_CORRUPTION;
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}
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ret = db->traverse(db, fn, private_data);
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if (ret != 0) {
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return NT_STATUS_UNSUCCESSFUL;
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}
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return NT_STATUS_OK;
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}
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struct printer_list_clean_state {
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time_t last_refresh;
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NTSTATUS status;
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};
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static int printer_list_clean_fn(struct db_record *rec, void *private_data)
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{
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struct printer_list_clean_state *state =
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(struct printer_list_clean_state *)private_data;
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uint32_t time_h, time_l;
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time_t refresh;
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char *name;
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char *comment;
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int ret;
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/* skip anything that does not contain PL_DATA_FORMAT data */
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if (strncmp((char *)rec->key.dptr,
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PL_KEY_PREFIX, sizeof(PL_KEY_PREFIX)-1)) {
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return 0;
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}
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ret = tdb_unpack(rec->value.dptr, rec->value.dsize,
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PL_DATA_FORMAT, &time_h, &time_l, &name, &comment);
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if (ret == -1) {
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DEBUG(1, ("Failed to un pack printer data"));
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state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
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return -1;
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}
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SAFE_FREE(name);
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SAFE_FREE(comment);
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refresh = (time_t)(((uint64_t)time_h << 32) + time_l);
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if (refresh < state->last_refresh) {
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state->status = rec->delete_rec(rec);
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if (!NT_STATUS_IS_OK(state->status)) {
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return -1;
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}
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}
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return 0;
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}
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NTSTATUS printer_list_clean_old(void)
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{
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struct printer_list_clean_state state;
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NTSTATUS status;
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status = printer_list_get_last_refresh(&state.last_refresh);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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state.status = NT_STATUS_OK;
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status = printer_list_traverse(printer_list_clean_fn, &state);
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if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL) &&
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!NT_STATUS_IS_OK(state.status)) {
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status = state.status;
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}
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return status;
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}
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struct printer_list_exec_state {
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void (*fn)(const char *, const char *, void *);
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void *private_data;
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NTSTATUS status;
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};
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static int printer_list_exec_fn(struct db_record *rec, void *private_data)
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{
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struct printer_list_exec_state *state =
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(struct printer_list_exec_state *)private_data;
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uint32_t time_h, time_l;
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char *name;
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char *comment;
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int ret;
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ret = tdb_unpack(rec->value.dptr, rec->value.dsize,
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PL_DATA_FORMAT, &time_h, &time_l, &name, &comment);
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if (ret == -1) {
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DEBUG(1, ("Failed to un pack printer data"));
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state->status = NT_STATUS_INTERNAL_DB_CORRUPTION;
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return -1;
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}
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state->fn(name, comment, state->private_data);
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SAFE_FREE(name);
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SAFE_FREE(comment);
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return 0;
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}
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NTSTATUS printer_list_run_fn(void (*fn)(const char *, const char *, void *),
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void *private_data)
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{
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struct printer_list_exec_state state;
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NTSTATUS status;
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state.fn = fn;
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state.private_data = private_data;
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state.status = NT_STATUS_OK;
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status = printer_list_traverse(printer_list_exec_fn, &state);
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if (NT_STATUS_EQUAL(status, NT_STATUS_UNSUCCESSFUL) &&
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!NT_STATUS_IS_OK(state.status)) {
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status = state.status;
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}
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return status;
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}
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42
source3/printing/printer_list.h
Normal file
42
source3/printing/printer_list.h
Normal file
@ -0,0 +1,42 @@
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/*
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Unix SMB/CIFS implementation.
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Share Database of available printers.
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Copyright (C) Simo Sorce 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 3 of the License, or
|
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(at your option) any later version.
|
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|
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This program is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
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|
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You should have received a copy of the GNU General Public License
|
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _PRINTER_LIST_H_
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#define _PRINTER_LIST_H_
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bool printer_list_parent_init(void);
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NTSTATUS printer_list_get_printer(TALLOC_CTX *mem_ctx,
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const char *name,
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const char **comment,
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time_t *last_refresh);
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NTSTATUS printer_list_set_printer(TALLOC_CTX *mem_ctx,
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const char *name,
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const char *comment,
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time_t last_refresh);
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NTSTATUS printer_list_get_last_refresh(time_t *last_refresh);
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NTSTATUS printer_list_mark_reload(void);
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NTSTATUS printer_list_clean_old(void);
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NTSTATUS printer_list_run_fn(void (*fn)(const char *, const char *, void *),
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void *private_data);
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#endif /* _PRINTER_LIST_H_ */
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Block a user