2 Unix SMB/Netbios implementation.
4 printing backend routines
5 Copyright (C) Andrew Tridgell 1992-2000
6 Copyright (C) Jeremy Allison 2002
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 static struct tdb_print_db
*print_db_head
;
27 /****************************************************************************
28 Function to find or create the printer specific job tdb given a printername.
29 Limits the number of tdb's open to MAX_PRINT_DBS_OPEN.
30 ****************************************************************************/
32 struct tdb_print_db
*get_print_db_byname(const char *printername
)
34 struct tdb_print_db
*p
= NULL
, *last_entry
= NULL
;
37 BOOL done_become_root
= False
;
39 SMB_ASSERT(printername
!= NULL
);
41 for (p
= print_db_head
, last_entry
= print_db_head
; p
; p
= p
->next
) {
42 /* Ensure the list terminates... JRA. */
43 SMB_ASSERT(p
->next
!= print_db_head
);
45 if (p
->tdb
&& strequal(p
->printer_name
, printername
)) {
46 DLIST_PROMOTE(print_db_head
, p
);
55 if (num_open
>= MAX_PRINT_DBS_OPEN
) {
56 /* Try and recycle the last entry. */
57 if (print_db_head
&& last_entry
) {
58 DLIST_PROMOTE(print_db_head
, last_entry
);
61 for (p
= print_db_head
; p
; p
= p
->next
) {
65 if (tdb_close(print_db_head
->tdb
)) {
66 DEBUG(0,("get_print_db: Failed to close tdb for printer %s\n",
67 print_db_head
->printer_name
));
73 memset(p
->printer_name
, '\0', sizeof(p
->printer_name
));
76 if (p
&& print_db_head
) {
77 DLIST_PROMOTE(print_db_head
, p
);
84 p
= SMB_MALLOC_P(struct tdb_print_db
);
86 DEBUG(0,("get_print_db: malloc fail !\n"));
90 DLIST_ADD(print_db_head
, p
);
93 pstrcpy(printdb_path
, lock_path("printing/"));
94 pstrcat(printdb_path
, printername
);
95 pstrcat(printdb_path
, ".tdb");
99 done_become_root
= True
;
102 p
->tdb
= tdb_open_log(printdb_path
, 5000, TDB_DEFAULT
, O_RDWR
|O_CREAT
,
105 if (done_become_root
)
109 DEBUG(0,("get_print_db: Failed to open printer backend database %s.\n",
111 DLIST_REMOVE(print_db_head
, p
);
115 fstrcpy(p
->printer_name
, printername
);
120 /***************************************************************************
121 Remove a reference count.
122 ****************************************************************************/
124 void release_print_db( struct tdb_print_db
*pdb
)
127 SMB_ASSERT(pdb
->ref_count
>= 0);
130 /***************************************************************************
131 Close all open print db entries.
132 ****************************************************************************/
134 void close_all_print_db(void)
136 struct tdb_print_db
*p
= NULL
, *next_p
= NULL
;
138 for (p
= print_db_head
; p
; p
= next_p
) {
143 DLIST_REMOVE(print_db_head
, p
);
150 /****************************************************************************
151 Fetch and clean the pid_t record list for all pids interested in notify
152 messages. data needs freeing on exit.
153 ****************************************************************************/
155 TDB_DATA
get_printer_notify_pid_list(TDB_CONTEXT
*tdb
, const char *printer_name
, BOOL cleanlist
)
162 data
= tdb_fetch_bystring( tdb
, NOTIFY_PID_LIST_KEY
);
169 if (data
.dsize
% 8) {
170 DEBUG(0,("get_printer_notify_pid_list: Size of record for printer %s not a multiple of 8 !\n", printer_name
));
171 tdb_delete_bystring(tdb
, NOTIFY_PID_LIST_KEY
);
172 SAFE_FREE(data
.dptr
);
181 * Weed out all dead entries.
184 for( i
= 0; i
< data
.dsize
; i
+= 8) {
185 pid_t pid
= (pid_t
)IVAL(data
.dptr
, i
);
187 if (pid
== sys_getpid())
190 /* Entry is dead if process doesn't exist or refcount is zero. */
192 while ((i
< data
.dsize
) && ((IVAL(data
.dptr
, i
+ 4) == 0) || !process_exists_by_pid(pid
))) {
194 /* Refcount == zero is a logic error and should never happen. */
195 if (IVAL(data
.dptr
, i
+ 4) == 0) {
196 DEBUG(0,("get_printer_notify_pid_list: Refcount == 0 for pid = %u printer %s !\n",
197 (unsigned int)pid
, printer_name
));
200 if (data
.dsize
- i
> 8)
201 memmove( &data
.dptr
[i
], &data
.dptr
[i
+8], data
.dsize
- i
- 8);