void init()
{
/* Call sys_setup. This sets up the root nodes, and filedesc's 0, 1 and 2. */
sys_setup();
kprintf("Something stirs and something tries, and starts to climb towards the light.\n");
/* Set some basic environment variables. These allow simple root execution,
* basic terminal access, and a shell to run from */
add_init_env("PATH=/bin/:/usr/bin/:/usr/sbin:");
add_init_env("TERM=seaos");
add_init_env("HOME=/");
add_init_env("SHELL=/bin/sh");
int ret=0;
int pid;
init_pid = current_task->pid+1;
set_cpu_interrupt_flag(1);
switch_to_user_mode();
/* We have to be careful now. If we try to call any kernel functions
* without doing a system call, the processor will generate a GPF (or
* a page fault) because you can't execute kernel code in ring 3!
* So we write simple wrapper functions for common functions that
* we will need */
ret = u_execve("/sh", (char **)stuff_to_pass, (char **)init_env);
unset_ksf(KSF_HAVEEXECED);
ret = u_execve("/bin/sh", (char **)stuff_to_pass, (char **)init_env);
unset_ksf(KSF_HAVEEXECED);
ret = u_execve("/usr/bin/sh", (char **)stuff_to_pass, (char **)init_env);
unset_ksf(KSF_HAVEEXECED);
printf("Failed to start the init process. Halting.\n");
u_exit(0);
}
static void user_mode_init(void)
{
/* We have to be careful now. If we try to call any kernel functions
* without doing a system call, the processor will generate a GPF (or
* a page fault) because you can't do fancy kernel stuff in ring 3!
* So we write simple wrapper functions for common functions that
* we will need */
char *init_env[5] = {
"PATH=/bin/:/usr/bin/:/usr/sbin:",
"TERM=seaos",
"HOME=/",
"SHELL=/bin/sh",
NULL
};
int ret;
char *init_argv[3] = {
"init",
root_device,
NULL
};
ret = u_execve("/init", (char **)init_argv, (char **)init_env);
printf("Failed to start the init process (err=%d). Halting.\n", -ret);
u_exit(0);
}
