mirror of https://github.com/pygos/init.git
86 lines
1.3 KiB
C
86 lines
1.3 KiB
C
/* SPDX-License-Identifier: ISC */
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#include "init.h"
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static int sigfd = -1;
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static void handle_signal(void)
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{
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struct signalfd_siginfo info;
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int status;
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pid_t pid;
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if (read(sigfd, &info, sizeof(info)) != sizeof(info)) {
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perror("read on signal fd");
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return;
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}
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switch (info.ssi_signo) {
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case SIGCHLD:
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while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
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status = WIFEXITED(status) ? WEXITSTATUS(status) :
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EXIT_FAILURE;
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supervisor_handle_exited(pid, status);
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}
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break;
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case SIGTERM:
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supervisor_set_target(TGT_SHUTDOWN);
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break;
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case SIGINT:
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supervisor_set_target(TGT_REBOOT);
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break;
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}
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}
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void target_completed(int target)
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{
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switch (target) {
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case TGT_BOOT:
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break;
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case TGT_SHUTDOWN:
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for (;;)
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reboot(RB_POWER_OFF);
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break;
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case TGT_REBOOT:
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for (;;)
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reboot(RB_AUTOBOOT);
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break;
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}
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}
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int main(void)
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{
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int ret, count;
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struct pollfd pfd[2];
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if (getpid() != 1) {
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fputs("init does not have pid 1, terminating!\n", stderr);
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return EXIT_FAILURE;
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}
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supervisor_init();
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sigfd = sigsetup();
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if (sigfd < 0)
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return -1;
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for (;;) {
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while (supervisor_process_queues())
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;
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memset(pfd, 0, sizeof(pfd));
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pfd[0].fd = sigfd;
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pfd[0].events = POLLIN;
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count = 1;
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ret = poll(pfd, count, -1);
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if (ret > 0) {
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if (pfd[0].revents & POLLIN)
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handle_signal();
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}
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}
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return EXIT_SUCCESS;
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}
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