11 Dec
2013
11 Dec
'13
12:15 p.m.
On Tue, Dec 03, 2013 at 06:22:56PM +0000, Mark Brown wrote:
On Tue, Dec 03, 2013 at 04:27:55PM +0000, Charles Keepax wrote:
+static void sig_handler(int signum __attribute__ ((unused))) +{
- printf("Interrupted, saving what we have!\n");
- finish_record();
- if (file)
fclose(file);- _exit(EXIT_FAILURE);
+}
You can't safely do most of this such as calling fclose() from within a signal handler, the set of functions that are guaranteed safe is quite limited - see signal(7).
A cool thing would be to use signalfd(2) to serialize the handling of the signal and getting rid of the traditional signal handler.
From a quick look at bionic it doesn't seem to define a syscall wrapper for that
so if one really wanted to use it, it would be through syscall(2) but that's a bit ugly for this purpose.
Thanks, Dimitris