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#include <ngx_config.h>
#include <ngx_core.h>
int ngx_max_sockets;
int ngx_inherited_nonblocking;
void ngx_signal_handler(int signo);
typedef struct {
int signo;
char *signame;
void (*handler)(int signo);
} ngx_signal_t;
ngx_signal_t signals[] = {
{ ngx_signal_value(NGX_RECONFIGURE_SIGNAL),
"SIG" ngx_value(NGX_RECONFIGURE_SIGNAL),
ngx_signal_handler },
{ ngx_signal_value(NGX_REOPEN_SIGNAL),
"SIG" ngx_value(NGX_REOPEN_SIGNAL),
ngx_signal_handler },
{ ngx_signal_value(NGX_PAUSE_SIGNAL),
"SIG" ngx_value(NGX_PAUSE_SIGNAL),
ngx_signal_handler },
{ ngx_signal_value(NGX_TERMINATE_SIGNAL),
"SIG" ngx_value(NGX_TERMINATE_SIGNAL),
ngx_signal_handler },
{ ngx_signal_value(NGX_SHUTDOWN_SIGNAL),
"SIG" ngx_value(NGX_SHUTDOWN_SIGNAL),
ngx_signal_handler },
{ ngx_signal_value(NGX_CHANGEBIN_SIGNAL),
"SIG" ngx_value(NGX_CHANGEBIN_SIGNAL),
ngx_signal_handler },
{ SIGCHLD, "SIGCHLD", ngx_signal_handler },
{ SIGPIPE, "SIGPIPE, SIG_IGN", SIG_IGN },
{ 0, NULL, NULL }
};
int ngx_posix_init(ngx_log_t *log)
{
ngx_signal_t *sig;
struct rlimit rlmt;
struct sigaction sa;
for (sig = signals; sig->signo != 0; sig++) {
ngx_memzero(&sa, sizeof(struct sigaction));
sa.sa_handler = sig->handler;
sigemptyset(&sa.sa_mask);
if (sigaction(sig->signo, &sa, NULL) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
"sigaction(%s) failed", sig->signame);
return NGX_ERROR;
}
}
if (getrlimit(RLIMIT_NOFILE, &rlmt) == -1) {
ngx_log_error(NGX_LOG_ALERT, log, errno,
"getrlimit(RLIMIT_NOFILE) failed)");
return NGX_ERROR;
}
ngx_log_error(NGX_LOG_INFO, log, 0,
"getrlimit(RLIMIT_NOFILE): " RLIM_T_FMT ":" RLIM_T_FMT,
rlmt.rlim_cur, rlmt.rlim_max);
ngx_max_sockets = rlmt.rlim_cur;
#if (HAVE_INHERITED_NONBLOCK)
ngx_inherited_nonblocking = 1;
#else
ngx_inherited_nonblocking = 0;
#endif
return NGX_OK;
}
void ngx_signal_handler(int signo)
{
char *action;
struct timeval tv;
ngx_err_t err;
ngx_signal_t *sig;
err = ngx_errno;
for (sig = signals; sig->signo != 0; sig++) {
if (sig->signo == signo) {
break;
}
}
ngx_gettimeofday(&tv);
ngx_time_update(tv.tv_sec);
action = "";
switch (ngx_process) {
case NGX_PROCESS_MASTER:
case NGX_PROCESS_QUITING:
case NGX_PROCESS_PAUSED:
switch (signo) {
case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
ngx_quit = 1;
action = ", shutdowning";
break;
case ngx_signal_value(NGX_TERMINATE_SIGNAL):
ngx_terminate = 1;
action = ", exiting";
break;
case ngx_signal_value(NGX_PAUSE_SIGNAL):
ngx_pause = 1;
action = ", pausing";
break;
case ngx_signal_value(NGX_RECONFIGURE_SIGNAL):
ngx_reconfigure = 1;
action = ", reconfiguring";
break;
case ngx_signal_value(NGX_REOPEN_SIGNAL):
ngx_reopen = 1;
action = ", reopen logs";
break;
case ngx_signal_value(NGX_CHANGEBIN_SIGNAL):
ngx_change_binary = 1;
action = ", changing binary";
break;
case SIGCHLD:
ngx_reap = 1;
break;
}
break;
case NGX_PROCESS_WORKER:
switch (signo) {
case ngx_signal_value(NGX_SHUTDOWN_SIGNAL):
ngx_quit = 1;
action = ", shutdowning";
break;
case ngx_signal_value(NGX_TERMINATE_SIGNAL):
ngx_terminate = 1;
action = ", exiting";
break;
#if 0
case ngx_signal_value(NGX_REOPEN_SIGNAL):
ngx_reopen = 1;
action = ", reopen logs";
break;
#endif
case ngx_signal_value(NGX_RECONFIGURE_SIGNAL):
case ngx_signal_value(NGX_REOPEN_SIGNAL):
case ngx_signal_value(NGX_PAUSE_SIGNAL):
case ngx_signal_value(NGX_CHANGEBIN_SIGNAL):
action = ", ignoring";
break;
}
break;
}
ngx_log_error(NGX_LOG_INFO, ngx_cycle->log, 0,
"signal %d (%s) received%s", signo, sig->signame, action);
if (signo == SIGCHLD) {
ngx_process_get_status();
}
ngx_set_errno(err);
}
int ngx_posix_post_conf_init(ngx_log_t *log)
{
ngx_fd_t pp[2];
if (pipe(pp) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "pipe() failed");
return NGX_ERROR;
}
if (dup2(pp[1], STDERR_FILENO) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, errno, "dup2(STDERR) failed");
return NGX_ERROR;
}
if (pp[1] > STDERR_FILENO) {
if (close(pp[1]) == -1) {
ngx_log_error(NGX_LOG_EMERG, log, errno, "close() failed");
return NGX_ERROR;
}
}
return NGX_OK;
}
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