/*
- * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
*
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
*/
/**
* \file stat.c functions used for sending/receiving the status of para_server
* and para_audiod
*/
+
+
+#include <sys/types.h>
+#include <dirent.h>
+
#include "para.h"
#include "close_on_fork.h"
#include "list.h"
#define MAX_STAT_CLIENTS 50
/**
- * The structure associated with a connected client that sent the 'stat' command
-*
+ * describes a status client of para_audiod
+ *
+ * There's one such structure per audiod client that sent the 'stat' command.
*
* A status client is identified by its file descriptor. para_audiod
* keeps a list of connected status clients.
*/
struct stat_client {
-/**
- *
- *
- * the stat client's file descriptor
- */
-int fd;
-long unsigned item_mask;
-/**
- *
- * its entry in the list of stat clients
-*/
-struct list_head node;
+ /** the stat client's file descriptor */
+ int fd;
+ /** bitmask of those status items the client is interested in */
+ long unsigned item_mask;
+ /** its entry in the list of stat clients */
+ struct list_head node;
};
static struct list_head client_list;
[SI_AUDIOD_UPTIME] = "audiod_uptime",
[SI_SELECTOR] = "dbtool"
};
-#define FOR_EACH_STAT_ITEM(i) for (i = 0; i < NUM_STAT_ITEMS; i++)
static void dump_stat_client_list(void)
{
/**
* add a status client to the list
*
+ * \param fd the file descriptor of the client
+ * \param mask bitfield of status items for this client
+ *
+ * Only those status items having the bit set in \a mask will be
+ * sent to the client.
+ *
* \return Positive value on success, or -E_TOO_MANY_CLIENTS if
- * the number of connected clients exceeds #MAX_STAT_CLIENTS
+ * the number of connected clients exceeds #MAX_STAT_CLIENTS.
*/
int stat_client_add(int fd, long unsigned mask)
{
new_client = para_malloc(sizeof(struct stat_client));
new_client->fd = fd;
new_client->item_mask = mask;
- add_close_on_fork_list(fd);
- list_add(&new_client->node, &client_list);
+ para_list_add(&new_client->node, &client_list);
dump_stat_client_list();
num_clients++;
return 1;
* On write errors, remove the status client from the client list and close its
* file descriptor.
*/
-void stat_client_write(char *msg, int itemnum)
+void stat_client_write(const char *msg, int itemnum)
{
struct stat_client *sc, *tmp;
- ssize_t len;
+ size_t len = strlen(msg);
struct timeval tv = {0 , 0};
- if (!initialized)
+ if (!initialized || !len)
return;
- len = strlen(msg);
list_for_each_entry_safe(sc, tmp, &client_list, node) {
int fd = sc->fd, ret;
fd_set wfds;
}
/* write error or fd not ready for writing */
close(fd);
- del_close_on_fork_list(fd);
num_clients--;
PARA_INFO_LOG("deleting client on fd %d\n", fd);
list_del(&sc->node);
PARA_DEBUG_LOG("%d client(s)\n", num_clients);
}
-/**
- * send empty status list
- *
- * Send to each connected client the full status item list
- * with empty values.
- */
-void dump_empty_status(void)
-{
- int i;
-
- if (!initialized)
- return;
- FOR_EACH_STAT_ITEM(i) {
- char *tmp = make_message("%s:\n", status_item_list[i]);
- stat_client_write(tmp, i);
- free(tmp);
- }
-}
/**
* check if string is a known status item.
return -E_UNKNOWN_STAT_ITEM;
}
-/**
- * call a custom function for each complete line
- *
- * \param buf the buffer containing data seperated by newlines
- * \param n the number of bytes in \a buf
- * \param line_handler the custom function
- *
- * If \a line_handler is \p NULL, return number of complete lines in buf.
- * Otherwise, call \a line_handler for each complete line. The rest of the
- * buffer (last chunk containing incomplete line is moved to the beginning of
- * the buffer.
- *
- * \return If line_handler is not NULL, this function returns the number
- * of bytes not handled to \a line_handler.
- */
-unsigned for_each_line(char *buf, int n, void (*line_handler)(char *))
-{
- char *start = buf, *end;
- int i, num_lines = 0;
-
- PARA_INFO_LOG("buf: %s", buf);
- while (start < buf + n) {
- char *next_null;
- char *next_cr;
-
- next_cr = memchr(start, '\n', buf + n - start);
- next_null = memchr(start, '\0', buf + n - start);
- if (!next_cr && !next_null)
- break;
- if (next_cr && next_null) {
- end = next_cr < next_null? next_cr : next_null;
- } else if (next_null) {
- end = next_null;
- } else
- end = next_cr;
- num_lines++;
- if (line_handler) {
- *end = '\0';
- PARA_INFO_LOG("calling line handler: %s\n", start);
- line_handler(start);
- start = ++end;
- } else
- start = ++end;
- }
- if (!line_handler)
- return num_lines;
- i = buf + n - start;
- if (i && i != n)
- memmove(buf, start, i);
- return i;
-}
-
projects / paraslash.git / blobdiff