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/*
* See https://stackoverflow.com/questions/42208228/how-to-automatically-close-the-execution-of-the-qemu-after-end-of-process
*/
#include <stdio.h>
#include <stdlib.h>
#include <sys/io.h>
#include <unistd.h>
#define SHUTDOWN_PORT 0x604
#define EXIT_PORT 0x501
static void clean_exit(void) {
ioperm(SHUTDOWN_PORT, 16, 1);
outw(0x2000, SHUTDOWN_PORT);
}
int main(int argc, char **argv) {
int status;
if (argc != 2) {
clean_exit();
}
status = atoi(argv[1]);
printf("exiting with status %d (in three seconds)\n", status);
sleep(3);
if (!status) {
clean_exit();
}
ioperm(EXIT_PORT, 8, 1);
/*
* status returned is 1+(2*orig_status)
*/
outb(status-1, EXIT_PORT);
printf("didn't exit.. did you include '-device isa-debug-exit'"
" in qemu command?\n");
exit(1);
}
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