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laminard: ignore SIGHUP

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Many daemons reload config file on SIGHUP; laminar don't have config file, so
signal is ignored (with informative message on stdout). Previously, default
handler for SIGHUP was used that terminates process.

Closes: #166
This commit is contained in:
Dmitry Bogatov 2022-01-28 17:08:22 -04:00 committed by Oliver Giles
parent 261c08d2fe
commit 99e2e62906
1 changed files with 9 additions and 0 deletions
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9
src/main.cpp
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@ -26,6 +26,7 @@
#include <kj/async-unix.h> #include <kj/async-unix.h>
#include <kj/filesystem.h> #include <kj/filesystem.h>
#include <signal.h> #include <signal.h>
#include <unistd.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/stat.h> #include <sys/stat.h>
@ -53,6 +54,13 @@ static void usage(std::ostream& out) {
out << " -v enable verbose output\n"; out << " -v enable verbose output\n";
} }
static void on_sighup(int)
{
constexpr const char msg[] = "Laminar received and ignored SIGHUP\n";
// write(2) is safe to call inside signal handler.
write(STDERR_FILENO, msg, sizeof(msg) - 1);
}
int main(int argc, char** argv) { int main(int argc, char** argv) {
if(argv[0][0] == '{') if(argv[0][0] == '{')
return leader_main(); return leader_main();
@ -92,6 +100,7 @@ int main(int argc, char** argv) {
signal(SIGINT, &laminar_quit); signal(SIGINT, &laminar_quit);
signal(SIGTERM, &laminar_quit); signal(SIGTERM, &laminar_quit);
signal(SIGHUP, &on_sighup);
printf("laminard version %s started\n", laminar_version()); printf("laminard version %s started\n", laminar_version());