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change signal handling at mcexec

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This commit is contained in:
Tomoki Shirasawa
2015-02-15 17:54:11 +09:00
parent 9a36e7b84a
commit 8b57b2ee57
1 changed files with 7 additions and 4 deletions
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11
executer/user/mcexec.c
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@ -811,7 +811,7 @@ static void *main_loop_thread_func(void *arg)
return NULL;
}
#define LOCALSIG SIGCHLD
#define LOCALSIG SIGURG
void
sendsig(int sig, siginfo_t *siginfo, void *context)
@ -872,8 +872,10 @@ act_sigaction(struct syscall_wait_desc *w)
int sig;
sig = w->sr.args[0];
if (sig == SIGCHLD || sig == LOCALSIG)
return;
memset(&act, '\0', sizeof act);
if (w->sr.args[1] == -1)
if (w->sr.args[1] == (unsigned long)SIG_IGN)
act.sa_handler = SIG_IGN;
else{
act.sa_sigaction = sendsig;
@ -945,7 +947,7 @@ void init_sigaction(void)
master_tid = gettid();
for (i = 1; i <= 64; i++) {
if (i != SIGKILL && i != SIGSTOP) {
if (i != SIGKILL && i != SIGSTOP && i != SIGCHLD) {
struct sigaction act;
sigaction(i, NULL, &act);
@ -1714,7 +1716,8 @@ fork_child_out:
/* Parent */
default:
if (read(sync_pipe_fd[0], &sync_msg, 1) != 1) {
while ((ret = read(sync_pipe_fd[0], &sync_msg, 1)) == -1 && errno == EINTR);
if (ret != 1) {
fprintf(stderr, "fork(): error reading sync message\n");
child = -1;
goto sync_out;