audiod: Use non-blocking writes for stat clients.

This allows to kill the call to write_ok() which involves
a select system call.

diff --git a/audiod_command.c b/audiod_command.c
index a54bd82d82c7c8f7fc1dbcaeed3faf63a1a08e12..0f7aa7e625ffcd0c7274f16e184f308b0322ceab 100644 (file)
--- a/audiod_command.c
+++ b/audiod_command.c
@@ -120,24 +120,22 @@ void stat_client_write_item(int item_num)
        struct para_buffer pb = {.flags = 0};
        struct para_buffer pfpb = {.flags = PBF_SIZE_PREFIX};
        const uint64_t one = 1;
+       char *msg = stat_item_values[item_num];
+       struct para_buffer *b;
 
        list_for_each_entry_safe(sc, tmp, &client_list, node) {
                int fd = sc->fd, ret;
 
                if (!((one << item_num) & sc->item_mask))
                        continue;
-               if (write_ok(fd) > 0) {
-                       struct para_buffer *b =
-                               (sc->flags & SCF_PARSER_FRIENDLY)? &pfpb : &pb;
-                       char *msg = stat_item_values[item_num];
-                       if (!b->buf)
-                               (void)WRITE_STATUS_ITEM(b, item_num, "%s\n",
-                                       msg? msg : "");
-                       ret = write(fd, b->buf, b->offset);
-                       if (ret == b->offset)
-                               continue;
-               }
-               /* write error or fd not ready for writing */
+               b = (sc->flags & SCF_PARSER_FRIENDLY)? &pfpb : &pb;
+               if (!b->buf)
+                       (void)WRITE_STATUS_ITEM(b, item_num, "%s\n",
+                               msg? msg : "");
+               ret = write(fd, b->buf, b->offset);
+               if (ret == b->offset)
+                       continue;
+               /* write error or short write */
                close(fd);
                num_clients--;
                PARA_INFO_LOG("deleting client on fd %d\n", fd);
@@ -147,8 +145,6 @@ void stat_client_write_item(int item_num)
        }
        free(pb.buf);
        free(pfpb.buf);
-//     if (num_clients)
-//             PARA_DEBUG_LOG("%d client(s)\n", num_clients);
 }
 
 /**
@@ -307,6 +303,9 @@ int com_stat(int fd, int argc, char **argv)
        const uint64_t one = 1;
        struct para_buffer b = {.flags = 0};
 
+       ret = mark_fd_nonblocking(fd);
+       if (ret < 0)
+               return ret;
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
                if (arg[0] != '-')