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#include <u.h>
#include <libc.h>
#include <auth.h>
#include <authsrv.h>
char* readenv(char*);
void setenv(char*, char*);
void cpenv(char*, char*);
void closefds(void);
void fexec(void(*)(void));
void rcexec(void);
void cpustart(void);
void pass(int);
char *service;
char *cmd;
char *cpu;
char *systemname;
int manual;
int iscpu;
void
main(int argc, char *argv[])
{
char *user;
int fd;
char ctl[128];
closefds();
service = "cpu";
manual = 0;
ARGBEGIN{
case 'c':
service = "cpu";
break;
case 'm':
manual = 1;
break;
case 't':
service = "terminal";
break;
}ARGEND
cmd = *argv;
snprint(ctl, sizeof(ctl), "#p/%d/ctl", getpid());
fd = open(ctl, OWRITE);
if(fd < 0)
print("init: warning: can't open %s: %r\n", ctl);
else
if(write(fd, "pri 10", 6) != 6)
print("init: warning: can't set priority: %r\n");
close(fd);
cpu = readenv("#e/cputype");
setenv("#e/objtype", cpu);
setenv("#e/service", service);
cpenv("/adm/timezone/local", "#e/timezone");
user = readenv("#c/user");
systemname = readenv("#c/sysname");
newns(user, 0);
iscpu = strcmp(service, "cpu")==0;
if(iscpu && manual == 0)
fexec(cpustart);
for(;;){
print("\ninit: starting /bin/rc\n");
fexec(rcexec);
manual = 1;
cmd = 0;
sleep(1000);
}
}
void
pass(int fd)
{
char key[DESKEYLEN];
char typed[32];
char crypted[DESKEYLEN];
int i;
for(;;){
print("\n%s password:", systemname);
for(i=0; i<sizeof typed; i++){
if(read(0, typed+i, 1) != 1){
print("init: can't read password; insecure\n");
return;
}
if(typed[i] == '\n'){
typed[i] = 0;
break;
}
}
if(i == sizeof typed)
continue;
if(passtokey(crypted, typed) == 0)
continue;
seek(fd, 0, 0);
if(read(fd, key, DESKEYLEN) != DESKEYLEN){
print("init: can't read key; insecure\n");
return;
}
if(memcmp(crypted, key, sizeof key))
continue;
/* clean up memory */
memset(crypted, 0, sizeof crypted);
memset(key, 0, sizeof key);
return;
}
}
static int gotnote;
void
pinhead(void*, char *msg)
{
gotnote = 1;
fprint(2, "init got note '%s'\n", msg);
noted(NCONT);
}
void
fexec(void (*execfn)(void))
{
Waitmsg *w;
int pid;
switch(pid=fork()){
case 0:
rfork(RFNOTEG);
(*execfn)();
print("init: exec error: %r\n");
exits("exec");
case -1:
print("init: fork error: %r\n");
exits("fork");
default:
casedefault:
notify(pinhead);
gotnote = 0;
w = wait();
if(w == nil){
if(gotnote)
goto casedefault;
print("init: wait error: %r\n");
break;
}
if(w->pid != pid){
free(w);
goto casedefault;
}
if(strstr(w->msg, "exec error") != 0){
print("init: exit string %s\n", w->msg);
print("init: sleeping because exec failed\n");
free(w);
for(;;)
sleep(1000);
}
if(w->msg[0])
print("init: rc exit status: %s\n", w->msg);
free(w);
break;
}
}
void
rcexec(void)
{
if(cmd)
execl("/bin/rc", "rc", "-c", cmd, nil);
else if(manual || iscpu)
execl("/bin/rc", "rc", nil);
else if(strcmp(service, "terminal") == 0)
execl("/bin/rc", "rc", "-c", ". /rc/bin/termrc; home=/usr/$user; cd; . lib/profile", nil);
else
execl("/bin/rc", "rc", nil);
}
void
cpustart(void)
{
execl("/bin/rc", "rc", "-c", "/rc/bin/cpurc", nil);
}
char*
readenv(char *name)
{
int f, len;
Dir *d;
char *val;
f = open(name, OREAD);
if(f < 0){
print("init: can't open %s: %r\n", name);
return "*unknown*";
}
d = dirfstat(f);
if(d == nil){
print("init: can't stat %s: %r\n", name);
return "*unknown*";
}
len = d->length;
free(d);
if(len == 0) /* device files can be zero length but have contents */
len = 64;
val = malloc(len+1);
if(val == nil){
print("init: can't malloc %s: %r\n", name);
return "*unknown*";
}
len = read(f, val, len);
close(f);
if(len < 0){
print("init: can't read %s: %r\n", name);
return "*unknown*";
}else
val[len] = '\0';
return val;
}
void
setenv(char *var, char *val)
{
int fd;
fd = create(var, OWRITE, 0644);
if(fd < 0)
print("init: can't open %s\n", var);
else{
fprint(fd, val);
close(fd);
}
}
void
cpenv(char *file, char *var)
{
int i, fd;
char buf[8192];
fd = open(file, OREAD);
if(fd < 0)
print("init: can't open %s\n", file);
else{
i = read(fd, buf, sizeof(buf)-1);
if(i <= 0)
print("init: can't read %s: %r\n", file);
else{
close(fd);
buf[i] = 0;
setenv(var, buf);
}
}
}
/*
* clean up after /boot
*/
void
closefds(void)
{
int i;
for(i = 3; i < 30; i++)
close(i);
}
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