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/* 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;
}
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