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#include <assert.h>
#include <fcntl.h>
#include <poll.h>
#include <pty.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <unistd.h>
int cmdfd;
void execsh(void) {
char *argv[] = {NULL};
execv("/sh", argv);
}
void newtty(void) {
int m;
int s;
openpty(&m, &s, NULL, NULL, NULL);
int pid = fork();
if (0 == pid) {
dup2(s, 0);
dup2(s, 1);
dup2(s, 2);
execsh();
return;
}
close(s);
cmdfd = m;
}
void shell() {
struct pollfd fds[2];
fds[0].fd = cmdfd;
fds[0].events = POLLIN;
fds[0].revents = 0;
fds[1].fd = open("/dev/keyboard", O_RDONLY, 0);
fds[1].events = POLLIN;
fds[1].revents = 0;
for (;; fds[0].revents = fds[1].revents = 0) {
poll(fds, 2, 0);
if (fds[0].revents & POLLIN) {
char c[4096];
int rc = read(fds[0].fd, c, 4096);
assert(rc > 0);
for (int i = 0; i < rc; i++)
putchar(c[i]);
}
if (fds[1].revents & POLLIN) {
char c;
int rc = read(fds[1].fd, &c, 1);
assert(rc > 0);
write(cmdfd, &c, 1);
// putchar(c);
}
}
}
int init_main(void) {
if (1 != getpid()) {
printf("minibox init must be launched as pid1.\n");
return 1;
}
if (fork()) {
for (;;) {
wait(NULL);
msleep(10000);
}
}
char *a[] = {NULL};
execv("/init.sh", a);
return 1;
}
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