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#include <init/driver/driver.h>
#include <init/fs/misc.h>
#include <init/shell.h>
#include <init/stdlib.h>
#include <init/tar.h>
#include <init/tests/main.h>
#include <shared/flags.h>
#include <shared/syscalls.h>
#include <stdint.h>
// TODO move to shared header file
#define argify(str) str, sizeof(str) - 1
extern char _bss_start; // provided by the linker
extern char _bss_end;
extern char _initrd;
void read_file(const char *path, size_t len);
__attribute__((section(".text.startup")))
int main(void) {
// allocate bss
_syscall_memflag(&_bss_start, &_bss_end - &_bss_start, MEMFLAG_PRESENT);
MOUNT("/init/", tar_driver(&_initrd));
MOUNT("/keyboard", ps2_drv());
MOUNT("/vga_tty", ansiterm_drv());
MOUNT("/bind/", fs_passthru(NULL));
if (_syscall_fork()) {
/* (used to) expose a bug in the kernel
* the program will flow like this:
* 1. we launch the forked init
* 2. the forked init launches both shells
* 3. one of the shells quit
* 4. the forked init picks it up and quits
*
* then, in process_kill, the other shell will be deathbedded
*
* before i implement(ed) reparenting, it was a lingering running child
* of a dead process, which is invalid state
*/
_syscall_await();
_syscall_exit(1);
}
if (!_syscall_fork()) {
__stdin = __stdout = _syscall_open(argify("/com1"));
if (__stdout < 0) _syscall_exit(1);
shell_loop();
_syscall_exit(1);
}
if (!_syscall_fork()) {
__stdout = _syscall_open(argify("/vga_tty"));
if (__stdout < 0) _syscall_exit(1);
__stdin = _syscall_open(argify("/keyboard"));
if (__stdin < 0) {
printf("couldn't open /keyboard\n");
_syscall_exit(1);
}
shell_loop();
_syscall_exit(1);
}
// try to find any working output
__stdout = _syscall_open(argify("/com1"));
if (__stdout < 0) __stdout = _syscall_open(argify("/vga_tty"));
_syscall_await();
printf("init: quitting\n");
_syscall_exit(0);
}
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