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#include <string.h>
#include <printf.h>
#include <malloc.h>
#include <syscall.h>
#include <debug.h>
#include <region_alloc.h>
#include <btree.h>
pid_t giosrv_pid = 0, login_pid = 0;
fd_pair_t root_gip_chan;
void _parse_cmdline_iter(void* a, void* b) {
dbg_printf(" '%s' -> '%s'\n", a, b);
}
btree_t *parse_cmdline(const char* x) {
btree_t *ret = create_btree(str_key_cmp_fun, free_key_val);
ASSERT(ret != 0);
x = strchr(x, ' ');
if (x == 0) return ret;
while ((*x) != 0) {
while (*x == ' ') x++;
char* eq = strchr(x, '=');
char* sep = strchr(x, ' ');
if (sep == 0) {
if (eq == 0) {
btree_add(ret, strdup(x), strdup(x));
} else {
btree_add(ret, strndup(x, eq - x), strdup(eq + 1));
}
break;
} else {
if (eq == 0 || eq > sep) {
btree_add(ret, strndup(x, sep - x), strndup(x, sep - x));
} else {
btree_add(ret, strndup(x, eq - x), strndup(eq + 1, sep - eq - 1));
}
x = sep + 1;
}
}
btree_iter(ret, _parse_cmdline_iter);
return ret;
}
btree_t* read_cmdline() {
char cmdline_buf[256];
fd_t f = open("io:/cmdline", FM_READ);
if (f == 0) return 0;
size_t len = read(f, 0, 255, cmdline_buf);
cmdline_buf[len] = 0;
close(f);
return parse_cmdline(cmdline_buf);
}
void setup_sys() {
fd_t sysdir_cfg = open("config:/sysdir", FM_READ);
if (sysdir_cfg == 0) PANIC("[init] Could not read config:/sysdir");
char buf[256];
size_t l = read(sysdir_cfg, 0, 255, buf);
buf[l] = 0;
close(sysdir_cfg);
char* eol = strchr(buf, '\n');
if (eol) *eol = 0;
dbg_printf("[init] Using system directory %s\n", buf);
bool ok;
char* sep = strchr(buf, ':');
if (sep == 0) {
ok = fs_subfs("sys", "root", buf, FM_READ | FM_MMAP | FM_READDIR);
} else {
*sep = 0;
ok = fs_subfs("sys", buf, sep +1, FM_READ | FM_MMAP | FM_READDIR);
}
if (!ok) PANIC("[init] Could not bind root:/sys to sys:/");
}
void launch_giosrv() {
if (giosrv_pid != 0) return;
giosrv_pid = new_proc();
if (giosrv_pid == 0) {
PANIC("[init] Could not create process for giosrv");
}
dbg_printf("[init] Setting up giosrv, pid: %d\n", giosrv_pid);
bool ok;
ok = bind_fs(giosrv_pid, "io", "io");
if (!ok) PANIC("[init] Could not bind io:/ to giosrv");
ok = bind_fs(giosrv_pid, "sys", "sys");
if (!ok) PANIC("[init] Could not bind sys:/ to giosrv");
ok = bind_fs(giosrv_pid, "config", "config");
if (!ok) PANIC("[init] Could not bind config:/ to giosrv");
ok = bind_fd(giosrv_pid, 1, root_gip_chan.a);
if (!ok) PANIC("[init] Could not bind root GIP channel FD to giosrv");
ok = proc_exec(giosrv_pid, "sys:/bin/giosrv.bin");
if (!ok) PANIC("[init] Could not run giosrv.bin");
dbg_printf("[init] giosrv started.\n");
}
void launch_login() {
if (login_pid != 0) return;
login_pid = new_proc();
if (login_pid == 0) {
PANIC("[init] Could not create process for login");
}
dbg_printf("[init] Setting up login, pid: %d\n", login_pid);
bool ok;
ok = bind_fs(login_pid, "root", "root");
if (!ok) PANIC("[init] Could not bind root:/ to login");
ok = bind_fs(login_pid, "sys", "sys");
if (!ok) PANIC("[init] Could not bind sys:/ to login");
ok = bind_fs(login_pid, "config", "config");
if (!ok) PANIC("[init] Could not bind config:/ to login");
ok = bind_fd(login_pid, 1, root_gip_chan.b);
if (!ok) PANIC("[init] Could not bind root GIP channel FD to login");
ok = proc_exec(login_pid, "sys:/bin/login.bin");
if (!ok) PANIC("[init] Could not run login.bin");
dbg_printf("[init] login started.\n");
}
int main(int argc, char **argv) {
dbg_print("[init] Starting up!\n");
// Read kernel cmdline
btree_t *cmdline = read_cmdline();
if (cmdline == 0) PANIC("[init] Could not parse cmdline");
// setup config:
if (btree_find(cmdline, "config") == 0) {
PANIC("[init] No config=xxx option specified on command line");
} else {
char* config = (char*)btree_find(cmdline, "config");
dbg_printf("[init] Loading system configuration: %s\n", config);
ASSERT(strlen(config) < 30);
char buf[50];
snprintf(buf, 50, "/config/%s", config);
bool ok = fs_subfs("config", "root", buf, FM_READ | FM_WRITE | FM_MMAP | FM_READDIR);
if (!ok) PANIC("[init] Could not setup config:");
}
// Setup sys:
setup_sys();
// Setup GIP channel for communication between giosrv and login
root_gip_chan = make_channel(false);
if (root_gip_chan.a == 0 || root_gip_chan.b == 0) {
PANIC("[init] Could not create root GIP channel.");
}
// Launch giosrv && login
launch_giosrv();
launch_login();
// Make sure no one dies
while(true) {
proc_status_t s;
proc_wait(0, false, &s);
if (s.pid != 0) {
if (s.pid == giosrv_pid) {
giosrv_pid = 0;
dbg_printf("[init] giosrv died, restarting.\n");
launch_giosrv();
} else if (s.pid == login_pid) {
login_pid = 0;
dbg_printf("[init] login died, restarting.\n");
launch_login();
} else {
ASSERT(false);
}
}
usleep(1000000);
}
return 0;
}
/* vim: set ts=4 sw=4 tw=0 noet :*/
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