Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

132 lines (108 sloc) 3.079 kb
/*
* twemproxy - A fast and lightweight proxy for memcached protocol.
* Copyright (C) 2011 Twitter, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdlib.h>
#include <signal.h>
#include <nc_core.h>
#include <nc_signal.h>
static struct signal signals[] = {
{ SIGUSR1, "SIGUSR1", 0, signal_handler },
{ SIGUSR2, "SIGUSR2", 0, signal_handler },
{ SIGTTIN, "SIGTTIN", 0, signal_handler },
{ SIGTTOU, "SIGTTOU", 0, signal_handler },
{ SIGHUP, "SIGHUP", 0, signal_handler },
{ SIGINT, "SIGINT", 0, signal_handler },
{ SIGSEGV, "SIGSEGV", (int)SA_RESETHAND, signal_handler },
{ SIGPIPE, "SIGPIPE", 0, SIG_IGN },
{ 0, NULL, 0, NULL }
};
rstatus_t
signal_init(void)
{
struct signal *sig;
for (sig = signals; sig->signo != 0; sig++) {
rstatus_t status;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = sig->handler;
sa.sa_flags = sig->flags;
sigemptyset(&sa.sa_mask);
status = sigaction(sig->signo, &sa, NULL);
if (status < 0) {
log_error("sigaction(%s) failed: %s", sig->signame,
strerror(errno));
return NC_ERROR;
}
}
return NC_OK;
}
void
signal_deinit(void)
{
}
void
signal_handler(int signo)
{
struct signal *sig;
void (*action)(void);
char *actionstr;
bool done;
for (sig = signals; sig->signo != 0; sig++) {
if (sig->signo == signo) {
break;
}
}
ASSERT(sig->signo != 0);
actionstr = "";
action = NULL;
done = false;
switch (signo) {
case SIGUSR1:
break;
case SIGUSR2:
break;
case SIGTTIN:
actionstr = ", up logging level";
action = log_level_up;
break;
case SIGTTOU:
actionstr = ", down logging level";
action = log_level_down;
break;
case SIGHUP:
actionstr = ", reopening log file";
action = log_reopen;
break;
case SIGINT:
done = true;
actionstr = ", exiting";
break;
case SIGSEGV:
nc_stacktrace(1);
actionstr = ", core dumping";
raise(SIGSEGV);
break;
default:
NOT_REACHED();
}
loga("signal %d (%s) received%s", signo, sig->signame, actionstr);
if (action != NULL) {
action();
}
if (done) {
exit(1);
}
}
Jump to Line
Something went wrong with that request. Please try again.