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Fix SIGHUP handler, cosmetic changes

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Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
This commit is contained in:
Claudio Matsuoka committed 2007-12-30 18:27:24 -02:00
1 parent 5f6d9d0109
commit 3a636e833c
1 file changed
+33 -22
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finit.c
+33 -22
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@@ -30,12 +30,8 @@
void shutdown(int);
void wait_all(int);
void dummy(int sig)
{
/* do nothing */
}
void signal_handler(int);
void chld_handler(int);
int main()
@@ -61,17 +57,17 @@ int main()
for (i = 1; i < NSIG; i++)
SETSIG(sa, i, SIG_IGN, SA_RESTART);
SETSIG(sa, SIGINT, shutdown, 0);
SETSIG(sa, SIGPWR, dummy, 0);
SETSIG(sa, SIGUSR1, shutdown, 0);
SETSIG(sa, SIGUSR2, shutdown, 0);
SETSIG(sa, SIGTERM, dummy, 0);
SETSIG(sa, SIGKILL, dummy, 0);
SETSIG(sa, SIGALRM, dummy, 0);
SETSIG(sa, SIGHUP, wait_all, 0);
SETSIG(sa, SIGSTOP, dummy, SA_RESTART);
SETSIG(sa, SIGCONT, dummy, SA_RESTART);
SETSIG(sa, SIGCHLD, wait_all, SA_RESTART);
SETSIG(sa, SIGINT, shutdown, 0);
SETSIG(sa, SIGPWR, signal_handler, 0);
SETSIG(sa, SIGUSR1, shutdown, 0);
SETSIG(sa, SIGUSR2, shutdown, 0);
SETSIG(sa, SIGTERM, signal_handler, 0);
SETSIG(sa, SIGKILL, signal_handler, 0);
SETSIG(sa, SIGALRM, signal_handler, 0);
SETSIG(sa, SIGHUP, signal_handler, 0);
SETSIG(sa, SIGSTOP, signal_handler, SA_RESTART);
SETSIG(sa, SIGCONT, signal_handler, SA_RESTART);
SETSIG(sa, SIGCHLD, chld_handler, SA_RESTART);
/* Block sigchild while forking */
sigemptyset(&nmask);
@@ -224,6 +220,9 @@ int main()
}
/*
* Shut down on INT USR1 USR2
*/
void shutdown(int sig)
{
int fd;
@@ -259,13 +258,25 @@ void shutdown(int sig)
}
void wait_all(int sig)
/*
* SIGCHLD: one of our children has died
*/
void chld_handler(int sig)
{
int status;
pid_t pid;
do {
pid = waitpid(-1, &status, WNOHANG);
} while (pid != 0 && errno != ECHILD);
while (waitpid(-1, &status, WNOHANG) != 0) {
if (errno == ECHILD)
break;
}
}
/*
* We got a signal (PWR TERM ALRM HUP STOP CONT)
*/
void signal_handler(int sig)
{
/* do nothing */
}