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authorGerald Carter <jerry@samba.org>2002-11-26 00:01:56 +0000
committerGerald Carter <jerry@samba.org>2002-11-26 00:01:56 +0000
commit585e8a8c02f78a072b98f681fda5748c3d9924ab (patch)
tree0e18ced080883cb8270e4c21b332f65caeca835a /source3/printing/printing.c
parent793cfe497e5a29b5e49388fc81a679cb2f9d90c7 (diff)
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[print notify fixes from APP_HEAD]
* fixing change notify on print server handle * adding change notify support into smbcontrol for sending comment changes, etc... All part of CR 1159/1160 (This used to be commit 256d8c27cdc6f802f3bfba44593b07014f6ae10a)
Diffstat (limited to 'source3/printing/printing.c')
-rw-r--r--source3/printing/printing.c314
1 files changed, 35 insertions, 279 deletions
diff --git a/source3/printing/printing.c b/source3/printing/printing.c
index a8f9097255..a6b5e5cb83 100644
--- a/source3/printing/printing.c
+++ b/source3/printing/printing.c
@@ -136,135 +136,6 @@ static pid_t local_pid;
static int get_queue_status(int, print_status_struct *);
-/* There can be this many printing tdb's open, plus any locked ones. */
-#define MAX_PRINT_DBS_OPEN 1
-
-struct tdb_print_db {
- struct tdb_print_db *next, *prev;
- TDB_CONTEXT *tdb;
- int ref_count;
- fstring printer_name;
-};
-
-static struct tdb_print_db *print_db_head;
-
-/****************************************************************************
- Function to find or create the printer specific job tdb given a printername.
- Limits the number of tdb's open to MAX_PRINT_DBS_OPEN.
-****************************************************************************/
-
-static struct tdb_print_db *get_print_db_byname(const char *printername)
-{
- struct tdb_print_db *p = NULL, *last_entry = NULL;
- int num_open = 0;
- pstring printdb_path;
- BOOL done_become_root = False;
-
- for (p = print_db_head, last_entry = print_db_head; p; p = p->next) {
- /* Ensure the list terminates... JRA. */
- SMB_ASSERT(p->next != print_db_head);
-
- if (p->tdb && strequal(p->printer_name, printername)) {
- DLIST_PROMOTE(print_db_head, p);
- p->ref_count++;
- return p;
- }
- num_open++;
- last_entry = p;
- }
-
- /* Not found. */
- if (num_open >= MAX_PRINT_DBS_OPEN) {
- /* Try and recycle the last entry. */
- DLIST_PROMOTE(print_db_head, last_entry);
-
- for (p = print_db_head; p; p = p->next) {
- if (p->ref_count)
- continue;
- if (p->tdb) {
- if (tdb_close(print_db_head->tdb)) {
- DEBUG(0,("get_print_db: Failed to close tdb for printer %s\n",
- print_db_head->printer_name ));
- return NULL;
- }
- }
- p->tdb = NULL;
- p->ref_count = 0;
- memset(p->printer_name, '\0', sizeof(p->printer_name));
- break;
- }
- if (p) {
- DLIST_PROMOTE(print_db_head, p);
- p = print_db_head;
- }
- }
-
- if (!p) {
- /* Create one. */
- p = (struct tdb_print_db *)malloc(sizeof(struct tdb_print_db));
- if (!p) {
- DEBUG(0,("get_print_db: malloc fail !\n"));
- return NULL;
- }
- ZERO_STRUCTP(p);
- DLIST_ADD(print_db_head, p);
- }
-
- pstrcpy(printdb_path, lock_path("printing/"));
- pstrcat(printdb_path, printername);
- pstrcat(printdb_path, ".tdb");
-
- if (geteuid() != 0) {
- become_root();
- done_become_root = True;
- }
-
- p->tdb = tdb_open_log(printdb_path, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
-
- if (done_become_root)
- unbecome_root();
-
- if (!p->tdb) {
- DEBUG(0,("get_print_db: Failed to open printer backend database %s.\n",
- printdb_path ));
- DLIST_REMOVE(print_db_head, p);
- SAFE_FREE(p);
- return NULL;
- }
- fstrcpy(p->printer_name, printername);
- p->ref_count++;
- return p;
-}
-
-/***************************************************************************
- Remove a reference count.
-****************************************************************************/
-
-static void release_print_db( struct tdb_print_db *pdb)
-{
- pdb->ref_count--;
- SMB_ASSERT(pdb->ref_count >= 0);
-}
-
-/***************************************************************************
- Close all open print db entries.
-****************************************************************************/
-
-static void close_all_print_db(void)
-{
- struct tdb_print_db *p = NULL, *next_p = NULL;
-
- for (p = print_db_head; p; p = next_p) {
- next_p = p->next;
-
- if (p->tdb)
- tdb_close(p->tdb);
- DLIST_REMOVE(print_db_head, p);
- ZERO_STRUCTP(p);
- SAFE_FREE(p);
- }
-}
-
/****************************************************************************
Initialise the printing backend. Called once at startup before the fork().
****************************************************************************/
@@ -1047,134 +918,6 @@ static void print_queue_update(int snum)
}
/****************************************************************************
- Fetch and clean the pid_t record list for all pids interested in notify
- messages. data needs freeing on exit.
-****************************************************************************/
-
-#define NOTIFY_PID_LIST_KEY "NOTIFY_PID_LIST"
-#define PRINT_SERVER_ENTRY_NAME "___PRINT_SERVER_ENTRY___"
-
-static TDB_DATA get_printer_notify_pid_list(TDB_CONTEXT *tdb, const char *printer_name, BOOL cleanlist)
-{
- TDB_DATA data;
- size_t i;
-
- ZERO_STRUCT(data);
-
- data = tdb_fetch_by_string( tdb, NOTIFY_PID_LIST_KEY );
-
- if (!data.dptr) {
- ZERO_STRUCT(data);
- return data;
- }
-
- if (data.dsize % 8) {
- DEBUG(0,("get_printer_notify_pid_list: Size of record for printer %s not a multiple of 8 !\n", printer_name ));
- tdb_delete_by_string(tdb, NOTIFY_PID_LIST_KEY );
- SAFE_FREE(data.dptr);
- ZERO_STRUCT(data);
- return data;
- }
-
- if (!cleanlist)
- return data;
-
- /*
- * Weed out all dead entries.
- */
-
- for( i = 0; i < data.dsize; i += 8) {
- pid_t pid = (pid_t)IVAL(data.dptr, i);
-
- if (pid == sys_getpid())
- continue;
-
- /* Entry is dead if process doesn't exist or refcount is zero. */
-
- while ((i < data.dsize) && ((IVAL(data.dptr, i + 4) == 0) || !process_exists(pid))) {
-
- /* Refcount == zero is a logic error and should never happen. */
- if (IVAL(data.dptr, i + 4) == 0) {
- DEBUG(0,("get_printer_notify_pid_list: Refcount == 0 for pid = %u printer %s !\n",
- (unsigned int)pid, printer_name ));
- }
-
- if (data.dsize - i > 8)
- memmove( &data.dptr[i], &data.dptr[i+8], data.dsize - i - 8);
- data.dsize -= 8;
- }
- }
-
- return data;
-}
-
-/****************************************************************************
- Return a malloced list of pid_t's that are interested in getting update
- messages on this print queue. Used in printing/notify to send the messages.
-****************************************************************************/
-
-BOOL print_notify_pid_list(const char *printername, TALLOC_CTX *mem_ctx, size_t *p_num_pids, pid_t **pp_pid_list)
-{
- struct tdb_print_db *pdb = NULL;
- TDB_CONTEXT *tdb = NULL;
- TDB_DATA data;
- BOOL ret = True;
- size_t i, num_pids, offset;
- pid_t *pid_list;
-
- *p_num_pids = 0;
- *pp_pid_list = NULL;
-
- if (strequal(printername, PRINT_SERVER_ENTRY_NAME)) {
- pdb = NULL;
- tdb = conn_tdb_ctx();
- } else {
- pdb = get_print_db_byname(printername);
- if (!pdb)
- return False;
- tdb = pdb->tdb;
- }
-
- if (tdb_read_lock_bystring(tdb, NOTIFY_PID_LIST_KEY, 10) == -1) {
- DEBUG(0,("print_notify_pid_list: Failed to lock printer %s database\n",
- printername));
- if (pdb)
- release_print_db(pdb);
- return False;
- }
-
- data = get_printer_notify_pid_list( tdb, printername, True );
-
- if (!data.dptr) {
- ret = True;
- goto done;
- }
-
- num_pids = data.dsize / 8;
-
- if ((pid_list = (pid_t *)talloc(mem_ctx, sizeof(pid_t) * num_pids)) == NULL) {
- ret = False;
- goto done;
- }
-
- for( i = 0, offset = 0; offset < data.dsize; offset += 8, i++)
- pid_list[i] = (pid_t)IVAL(data.dptr, offset);
-
- *pp_pid_list = pid_list;
- *p_num_pids = num_pids;
-
- ret = True;
-
- done:
-
- tdb_read_unlock_bystring(tdb, NOTIFY_PID_LIST_KEY);
- if (pdb)
- release_print_db(pdb);
- SAFE_FREE(data.dptr);
- return ret;
-}
-
-/****************************************************************************
Create/Update an entry in the print tdb that will allow us to send notify
updates only to interested smbd's.
****************************************************************************/
@@ -1189,16 +932,29 @@ BOOL print_notify_register_pid(int snum)
BOOL ret = False;
size_t i;
- if (snum != -1) {
+ /* if (snum == -1), then the change notify request was
+ on a print server handle and we need to register on
+ all print queus */
+
+ if (snum == -1)
+ {
+ int num_services = lp_numservices();
+ int idx;
+
+ for ( idx=0; idx<num_services; idx++ ) {
+ if (lp_snum_ok(idx) && lp_print_ok(idx) )
+ print_notify_register_pid(idx);
+ }
+
+ return True;
+ }
+ else /* register for a specific printer */
+ {
printername = lp_const_servicename(snum);
pdb = get_print_db_byname(printername);
if (!pdb)
return False;
tdb = pdb->tdb;
- } else {
- printername = PRINT_SERVER_ENTRY_NAME;
- pdb = NULL;
- tdb = conn_tdb_ctx();
}
if (tdb_lock_bystring(tdb, NOTIFY_PID_LIST_KEY, 10) == -1) {
@@ -1267,16 +1023,28 @@ BOOL print_notify_deregister_pid(int snum)
size_t i;
BOOL ret = False;
- if (snum != -1) {
+ /* if ( snum == -1 ), we are deregister a print server handle
+ which means to deregister on all print queues */
+
+ if (snum == -1)
+ {
+ int num_services = lp_numservices();
+ int idx;
+
+ for ( idx=0; idx<num_services; idx++ ) {
+ if ( lp_snum_ok(idx) && lp_print_ok(idx) )
+ print_notify_deregister_pid(idx);
+ }
+
+ return True;
+ }
+ else /* deregister a specific printer */
+ {
printername = lp_const_servicename(snum);
pdb = get_print_db_byname(printername);
if (!pdb)
return False;
tdb = pdb->tdb;
- } else {
- printername = PRINT_SERVER_ENTRY_NAME;
- pdb = NULL;
- tdb = conn_tdb_ctx();
}
if (tdb_lock_bystring(tdb, NOTIFY_PID_LIST_KEY, 10) == -1) {
@@ -2198,18 +1966,6 @@ int print_queue_status(int snum,
}
/****************************************************************************
- Turn a queue name into a snum.
-****************************************************************************/
-
-int print_queue_snum(const char *qname)
-{
- int snum = lp_servicenumber(qname);
- if (snum == -1 || !lp_print_ok(snum))
- return -1;
- return snum;
-}
-
-/****************************************************************************
Pause a queue.
****************************************************************************/