mirror of
https://github.com/pygos/init.git
synced 2024-11-22 19:19:47 +01:00
101 lines
2 KiB
C
101 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
|
|
/*
|
|
* Copyright (C) 2018 - David Oberhollenzer
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "init.h"
|
|
|
|
static int sigfd = -1;
|
|
|
|
static void handle_signal(void)
|
|
{
|
|
struct signalfd_siginfo info;
|
|
int status;
|
|
pid_t pid;
|
|
|
|
if (read(sigfd, &info, sizeof(info)) != sizeof(info)) {
|
|
perror("read on signal fd");
|
|
return;
|
|
}
|
|
|
|
switch (info.ssi_signo) {
|
|
case SIGCHLD:
|
|
while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
|
|
status = WIFEXITED(status) ? WEXITSTATUS(status) :
|
|
EXIT_FAILURE;
|
|
|
|
supervisor_handle_exited(pid, status);
|
|
}
|
|
break;
|
|
case SIGTERM:
|
|
supervisor_set_target(TGT_SHUTDOWN);
|
|
break;
|
|
case SIGINT:
|
|
supervisor_set_target(TGT_REBOOT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void target_completed(int target)
|
|
{
|
|
switch (target) {
|
|
case TGT_BOOT:
|
|
break;
|
|
case TGT_SHUTDOWN:
|
|
for (;;)
|
|
reboot(RB_POWER_OFF);
|
|
break;
|
|
case TGT_REBOOT:
|
|
for (;;)
|
|
reboot(RB_AUTOBOOT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int ret, count;
|
|
struct pollfd pfd[2];
|
|
|
|
if (getpid() != 1) {
|
|
fputs("init does not have pid 1, terminating!\n", stderr);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
supervisor_init();
|
|
|
|
sigfd = sigsetup();
|
|
if (sigfd < 0)
|
|
return -1;
|
|
|
|
for (;;) {
|
|
while (supervisor_process_queues())
|
|
;
|
|
|
|
memset(pfd, 0, sizeof(pfd));
|
|
pfd[0].fd = sigfd;
|
|
pfd[0].events = POLLIN;
|
|
count = 1;
|
|
|
|
ret = poll(pfd, count, -1);
|
|
|
|
if (ret > 0) {
|
|
if (pfd[0].revents & POLLIN)
|
|
handle_signal();
|
|
}
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|