From 96de8fd37734599d997bcb9fdd2b076d9cfb026e Mon Sep 17 00:00:00 2001 From: Aron Podrigal Date: Thu, 16 Jan 2025 10:13:31 -0600 Subject: [PATCH] [mod_timerfd] Fixed - continue timer loop after receiving a SIGSTOP When taking a snapshot of a machine which pauses the process, mod_timerfd exits and FreeSWITCH, causing all channels to wait indefinitely. Check `errno == EINTR` and continue the timer loop. --- src/mod/timers/mod_timerfd/mod_timerfd.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/src/mod/timers/mod_timerfd/mod_timerfd.c b/src/mod/timers/mod_timerfd/mod_timerfd.c index bd07be8cdd..641bfba9c5 100644 --- a/src/mod/timers/mod_timerfd/mod_timerfd.c +++ b/src/mod/timers/mod_timerfd/mod_timerfd.c @@ -31,6 +31,7 @@ */ #include +#include #include #include @@ -228,8 +229,16 @@ SWITCH_MODULE_RUNTIME_FUNCTION(mod_timerfd_runtime) do { r = epoll_wait(interval_poll_fd, e, sizeof(e) / sizeof(e[0]), 1000); - if (r < 0) + if (r < 0) { + /* if we had an interrupted system call due to process pause via SIGSTOP, do not exit the timer loop */ + if (errno == EINTR) { + switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "epoll_wait interrupted by SIGINT, continue...\n"); + continue; + } + break; + } + for (i = 0; i < r; i++) { it = e[i].data.ptr; if ((e[i].events & EPOLLIN) &&