Hi Ordit, > On our application we used the code sample btmgmt.c > which uses mgmt_new_default, this function will fail if > fd >127 (because mainloop_add_fd will fail in io_new function). > > mgmt_new_default: > fd = socket(PF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, BTPROTO_HCI); > > what is the best way to workaround this issue assuming I have only > btmgmt.c code and would rather not change other files? because we have #define MAX_MAINLOOP_ENTRIES 128 in the mainloop.c code. I assumed that 127 file descriptors is plenty for what any BlueZ application is doing. Regards Marcel