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Add graceful shutdown on SIGINT/SIGTERM.

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Add signal handlers for SIGINT/SIGTERM that set a shutdown
flag. Initialize the live inspector with a timeout so the main loop can
watch the flag set by the signal handlers.
This commit is contained in:
Mark Stemm 2016-05-19 16:17:27 -07:00
parent 22dce61974
commit 1a2719437f
1 changed files with 28 additions and 2 deletions
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30
userspace/falco/falco.cpp
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@ -28,6 +28,14 @@ extern "C" {
#include "utils.h" #include "utils.h"
#include <yaml-cpp/yaml.h> #include <yaml-cpp/yaml.h>
bool g_terminate = false;
//
// Helper functions
//
static void signal_callback(int signal)
{
g_terminate = true;
}
// //
// Program help // Program help
@ -90,7 +98,11 @@ void do_inspect(sinsp* inspector,
res = inspector->next(&ev); res = inspector->next(&ev);
if(res == SCAP_TIMEOUT) if (g_terminate)
{
break;
}
else if(res == SCAP_TIMEOUT)
{ {
continue; continue;
} }
@ -398,6 +410,20 @@ int falco_init(int argc, char **argv)
add_output(ls, *it); add_output(ls, *it);
} }
if(signal(SIGINT, signal_callback) == SIG_ERR)
{
fprintf(stderr, "An error occurred while setting SIGINT signal handler.\n");
result = EXIT_FAILURE;
goto exit;
}
if(signal(SIGTERM, signal_callback) == SIG_ERR)
{
fprintf(stderr, "An error occurred while setting SIGTERM signal handler.\n");
result = EXIT_FAILURE;
goto exit;
}
if (scap_filename.size()) if (scap_filename.size())
{ {
inspector->open(scap_filename); inspector->open(scap_filename);
@ -406,7 +432,7 @@ int falco_init(int argc, char **argv)
{ {
try try
{ {
inspector->open(); inspector->open(200);
} }
catch(sinsp_exception e) catch(sinsp_exception e)
{ {