struct parm_struct *lp_get_parameter(const char *param_name);
struct parm_struct *lp_next_parameter(int snum, int *i, int allparameters);
bool lp_snum_ok(int iService);
-void lp_add_one_printer(char *name, char *comment);
+void lp_add_one_printer(const char *name, const char *comment, void *pdata);
bool lp_loaded(void);
void lp_killunused(bool (*snumused) (int));
void lp_kill_all_services(void);
/* The following definitions come from printing/pcap.c */
+bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment);
+void pcap_cache_destroy_specific(struct pcap_cache **ppcache);
bool pcap_cache_add(const char *name, const char *comment);
bool pcap_cache_loaded(void);
+void pcap_cache_replace(const struct pcap_cache *cache);
void pcap_cache_reload(void);
bool pcap_printername_ok(const char *printername);
-void pcap_printer_fn(void (*fn)(char *, char *));
+void pcap_printer_fn_specific(const struct pcap_cache *, void (*fn)(const char *, const char *, void *), void *);
+void pcap_printer_fn(void (*fn)(const char *, const char *, void *), void *);
/* The following definitions come from printing/print_aix.c */
#include "includes.h"
-typedef struct pcap_cache {
+struct pcap_cache {
char *name;
char *comment;
struct pcap_cache *next;
-} pcap_cache_t;
+};
-static pcap_cache_t *pcap_cache = NULL;
+/* The systemwide printcap cache. */
+static struct pcap_cache *pcap_cache = NULL;
-bool pcap_cache_add(const char *name, const char *comment)
+bool pcap_cache_add_specific(struct pcap_cache **ppcache, const char *name, const char *comment)
{
- pcap_cache_t *p;
+ struct pcap_cache *p;
- if (name == NULL || ((p = SMB_MALLOC_P(pcap_cache_t)) == NULL))
- return False;
+ if (name == NULL || ((p = SMB_MALLOC_P(struct pcap_cache)) == NULL))
+ return false;
p->name = SMB_STRDUP(name);
p->comment = (comment && *comment) ? SMB_STRDUP(comment) : NULL;
- p->next = pcap_cache;
- pcap_cache = p;
+ DEBUG(11,("pcap_cache_add_specific: Adding name %s info %s\n",
+ p->name, p->comment ? p->comment : ""));
+
+ p->next = *ppcache;
+ *ppcache = p;
- return True;
+ return true;
}
-static void pcap_cache_destroy(pcap_cache_t *cache)
+void pcap_cache_destroy_specific(struct pcap_cache **pp_cache)
{
- pcap_cache_t *p, *next;
+ struct pcap_cache *p, *next;
- for (p = cache; p != NULL; p = next) {
+ for (p = *pp_cache; p != NULL; p = next) {
next = p->next;
SAFE_FREE(p->name);
SAFE_FREE(p->comment);
SAFE_FREE(p);
}
+ *pp_cache = NULL;
+}
+
+bool pcap_cache_add(const char *name, const char *comment)
+{
+ return pcap_cache_add_specific(&pcap_cache, name, comment);
}
bool pcap_cache_loaded(void)
return (pcap_cache != NULL);
}
+void pcap_cache_replace(const struct pcap_cache *pcache)
+{
+ const struct pcap_cache *p;
+
+ pcap_cache_destroy_specific(&pcap_cache);
+ for (p = pcache; p; p = p->next) {
+ pcap_cache_add(p->name, p->comment);
+ }
+}
+
void pcap_cache_reload(void)
{
const char *pcap_name = lp_printcapname();
bool pcap_reloaded = False;
- pcap_cache_t *tmp_cache = NULL;
+ struct pcap_cache *tmp_cache = NULL;
XFILE *pcap_file;
char *pcap_line;
DEBUG(3, ("reload status: %s\n", (pcap_reloaded) ? "ok" : "error"));
if (pcap_reloaded)
- pcap_cache_destroy(tmp_cache);
+ pcap_cache_destroy_specific(&tmp_cache);
else {
- pcap_cache_destroy(pcap_cache);
+ pcap_cache_destroy_specific(&pcap_cache);
pcap_cache = tmp_cache;
}
bool pcap_printername_ok(const char *printername)
{
- pcap_cache_t *p;
+ struct pcap_cache *p;
for (p = pcap_cache; p != NULL; p = p->next)
if (strequal(p->name, printername))
}
/***************************************************************************
-run a function on each printer name in the printcap file. The function is
-passed the primary name and the comment (if possible). Note the fn() takes
-strings in DOS codepage. This means the xxx_printer_fn() calls must be fixed
-to return DOS codepage. FIXME !! JRA.
-
-XXX: I'm not sure if this comment still applies.. Anyone? -Rob
+run a function on each printer name in the printcap file.
***************************************************************************/
-void pcap_printer_fn(void (*fn)(char *, char *))
+
+void pcap_printer_fn_specific(const struct pcap_cache *pc,
+ void (*fn)(const char *, const char *, void *),
+ void *pdata)
{
- pcap_cache_t *p;
+ const struct pcap_cache *p;
- for (p = pcap_cache; p != NULL; p = p->next)
- fn(p->name, p->comment);
+ for (p = pc; p != NULL; p = p->next)
+ fn(p->name, p->comment, pdata);
return;
}
+
+void pcap_printer_fn(void (*fn)(const char *, const char *, void *), void *pdata)
+{
+ return pcap_printer_fn_specific(pcap_cache, fn, pdata);
+}
return http;
}
-bool cups_cache_reload(void)
+static void send_pcap_info(const char *name, const char *info, void *pd)
+{
+ int fd = *(int *)pd;
+ size_t namelen = name ? strlen(name)+1 : 0;
+ size_t infolen = info ? strlen(info)+1 : 0;
+
+ DEBUG(11,("send_pcap_info: writing namelen %u\n", (unsigned int)namelen));
+ if (sys_write(fd, &namelen, sizeof(namelen)) != sizeof(namelen)) {
+ DEBUG(10,("send_pcap_info: namelen write failed %s\n",
+ strerror(errno)));
+ return;
+ }
+ DEBUG(11,("send_pcap_info: writing infolen %u\n", (unsigned int)infolen));
+ if (sys_write(fd, &infolen, sizeof(infolen)) != sizeof(infolen)) {
+ DEBUG(10,("send_pcap_info: infolen write failed %s\n",
+ strerror(errno)));
+ return;
+ }
+ if (namelen) {
+ DEBUG(11,("send_pcap_info: writing name %s\n", name));
+ if (sys_write(fd, name, namelen) != namelen) {
+ DEBUG(10,("send_pcap_info: name write failed %s\n",
+ strerror(errno)));
+ return;
+ }
+ }
+ if (infolen) {
+ DEBUG(11,("send_pcap_info: writing info %s\n", info));
+ if (sys_write(fd, info, infolen) != infolen) {
+ DEBUG(10,("send_pcap_info: info write failed %s\n",
+ strerror(errno)));
+ return;
+ }
+ }
+}
+
+static bool cups_cache_reload_async(int fd)
{
TALLOC_CTX *frame = talloc_stackframe();
+ struct pcap_cache *tmp_pcap_cache = NULL;
http_t *http = NULL; /* HTTP connection to server */
ipp_t *request = NULL, /* IPP Request */
*response = NULL; /* IPP Response */
if (name == NULL)
break;
- if (!pcap_cache_add(name, info)) {
+ if (!pcap_cache_add_specific(&tmp_pcap_cache, name, info)) {
goto out;
}
}
if (name == NULL)
break;
- if (!pcap_cache_add(name, info)) {
+ if (!pcap_cache_add_specific(&tmp_pcap_cache, name, info)) {
goto out;
}
}
if (http)
httpClose(http);
+ /* Send all the entries up the pipe. */
+ if (tmp_pcap_cache) {
+ pcap_printer_fn_specific(tmp_pcap_cache,
+ send_pcap_info,
+ (void *)&fd);
+
+ pcap_cache_destroy_specific(&tmp_pcap_cache);
+ }
TALLOC_FREE(frame);
return ret;
}
+static struct pcap_cache *local_pcap_copy;
+struct fd_event *cache_fd_event;
+
+static bool cups_pcap_load_async(int *pfd)
+{
+ int fds[2];
+ pid_t pid;
+
+ if (cache_fd_event) {
+ DEBUG(3,("cups_pcap_load_async: already waiting for "
+ "a refresh event\n" ));
+ return false;
+ }
+
+ DEBUG(5,("cups_pcap_load_async: asynchronously loading cups printers\n"));
+
+ if (pipe(fds) == -1) {
+ return false;
+ }
+
+ pid = sys_fork();
+ if (pid == (pid_t)-1) {
+ DEBUG(10,("cups_pcap_load_async: fork failed %s\n",
+ strerror(errno) ));
+ close(fds[0]);
+ close(fds[1]);
+ return false;
+ }
+
+ if (pid) {
+ DEBUG(10,("cups_pcap_load_async: child pid = %u\n",
+ (unsigned int)pid ));
+ /* Parent. */
+ close(fds[1]);
+ *pfd = fds[0];
+ return true;
+ }
+
+ /* Child. */
+ close(fds[0]);
+ cups_cache_reload_async(fds[1]);
+ close(fds[1]);
+ _exit(0);
+}
+
+static void cups_async_callback(struct event_context *event_ctx,
+ struct fd_event *event,
+ uint16 flags,
+ void *p)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ int fd = *(int *)p;
+ struct pcap_cache *tmp_pcap_cache = NULL;
+
+ DEBUG(5,("cups_async_callback: callback received for printer data. "
+ "fd = %d\n", fd));
+
+ TALLOC_FREE(cache_fd_event);
+
+ while (1) {
+ char *name = NULL, *info = NULL;
+ size_t namelen = 0, infolen = 0;
+
+ if (sys_read(fd, &namelen, sizeof(namelen)) !=
+ sizeof(namelen)) {
+ DEBUG(10,("cups_async_callback: namelen read failed %d %s\n",
+ errno, strerror(errno)));
+ break;
+ }
+ if (sys_read(fd, &infolen, sizeof(infolen)) !=
+ sizeof(infolen)) {
+ DEBUG(10,("cups_async_callback: infolen read failed %s\n",
+ strerror(errno)));
+ break;
+ }
+ if (namelen) {
+ name = TALLOC_ARRAY(frame, char, namelen);
+ if (!name) {
+ break;
+ }
+ if (sys_read(fd, name, namelen) != namelen) {
+ DEBUG(10,("cups_async_callback: name read failed %s\n",
+ strerror(errno)));
+ break;
+ }
+ } else {
+ name = NULL;
+ }
+ if (infolen) {
+ info = TALLOC_ARRAY(frame, char, infolen);
+ if (!info) {
+ break;
+ }
+ if (sys_read(fd, info, infolen) != infolen) {
+ DEBUG(10,("cups_async_callback: info read failed %s\n",
+ strerror(errno)));
+ break;
+ }
+ } else {
+ info = NULL;
+ }
+
+ /* Add to our local pcap cache. */
+ pcap_cache_add_specific(&tmp_pcap_cache, name, info);
+ TALLOC_FREE(name);
+ TALLOC_FREE(info);
+ }
+
+ TALLOC_FREE(frame);
+ if (tmp_pcap_cache) {
+ /* We got a namelist, replace our local cache. */
+ pcap_cache_destroy_specific(&local_pcap_copy);
+ local_pcap_copy = tmp_pcap_cache;
+
+ /* And the systemwide pcap cache. */
+ pcap_cache_replace(local_pcap_copy);
+ } else {
+ DEBUG(2,("cups_async_callback: failed to read a new "
+ "printer list\n"));
+ }
+ close(fd);
+}
+
+bool cups_cache_reload(void)
+{
+ int fd = -1;
+
+ /* Set up an async refresh. */
+ if (!cups_pcap_load_async(&fd)) {
+ return false;
+ }
+ if (!local_pcap_copy) {
+ /* We have no local cache, wait directly for
+ * async refresh to complete.
+ */
+ cups_async_callback(smbd_event_context(),
+ NULL,
+ EVENT_FD_READ,
+ (void *)&fd);
+ if (!local_pcap_copy) {
+ return false;
+ }
+ } else {
+ /* Replace the system cache with our
+ * local copy. */
+ pcap_cache_replace(local_pcap_copy);
+
+ /* Trigger an event when the pipe can be read. */
+ cache_fd_event = event_add_fd(smbd_event_context(),
+ NULL, fd,
+ EVENT_FD_READ,
+ cups_async_callback,
+ (void *)&fd);
+ if (!cache_fd_event) {
+ close(fd);
+ return false;
+ }
+ }
+ return true;
+}
/*
* 'cups_job_delete()' - Delete a job.
git.samba.org / amitay / samba.git / commitdiff