static inline int init_tty_handle (struct shim_handle * hdl, bool write)
{
struct shim_dentry * dent = NULL;
int ret;
if ((ret = path_lookupat(NULL, "/dev/tty", LOOKUP_OPEN, &dent)) < 0)
return ret;
int flags = (write ? O_WRONLY : O_RDONLY)|O_APPEND;
struct shim_mount * fs = dent->fs;
ret = fs->d_ops->open(hdl, dent, flags);
if (ret < 0)
return ret;
set_handle_fs(hdl, fs);
hdl->dentry = dent;
hdl->flags = O_RDWR|O_APPEND|0100000;
int size;
char * path = dentry_get_path(dent, true, &size);
if (path)
qstrsetstr(&hdl->path, path, size);
else
qstrsetstr(&hdl->path, "/dev/tty", 8);
return 0;
}
static inline int init_exec_handle (struct shim_thread * thread)
{
if (!PAL_CB(executable))
return 0;
struct shim_handle * exec = get_new_handle();
if (!exec)
return -ENOMEM;
set_handle_fs(exec, &chroot_builtin_fs);
qstrsetstr(&exec->uri, PAL_CB(executable), strlen(PAL_CB(executable)));
exec->type = TYPE_FILE;
exec->flags = O_RDONLY;
exec->acc_mode = MAY_READ;
lock(thread->lock);
thread->exec = exec;
unlock(thread->lock);
return 0;
}
static int find_thread_link (const char * name, struct shim_qstr * link,
struct shim_dentry ** dentptr,
struct shim_thread ** threadptr)
{
const char * next, * nextnext;
int next_len;
int pid = parse_thread_name(name, &next, &next_len, &nextnext);
if (pid < 0)
return pid;
struct shim_thread * thread = lookup_thread(pid);
struct shim_dentry * dent = NULL;
int ret = 0;
if (!thread)
return -ENOENT;
if (!thread->in_vm) {
ret = -ENOENT;
goto out;
}
lock(&thread->lock);
if (next_len == static_strlen("root") && !memcmp(next, "root", next_len)) {
dent = thread->root;
get_dentry(dent);
}
if (next_len == static_strlen("cwd") && !memcmp(next, "cwd", next_len)) {
dent = thread->cwd;
get_dentry(dent);
}
if (next_len == static_strlen("exe") && !memcmp(next, "exe", next_len)) {
struct shim_handle * exec = thread->exec;
if (!exec->dentry) {
unlock(&thread->lock);
ret = -EINVAL;
goto out;
}
dent = exec->dentry;
get_dentry(dent);
}
unlock(&thread->lock);
if (nextnext) {
struct shim_dentry * next_dent = NULL;
ret = path_lookupat(dent, nextnext, 0, &next_dent, dent->fs);
if (ret < 0)
goto out;
put_dentry(dent);
dent = next_dent;
}
if (link) {
int size;
char * path = dentry_get_path(dent, true, &size);
qstrsetstr(link, path, size);
}
if (dentptr) {
get_dentry(dent);
*dentptr = dent;
}
if (threadptr) {
get_thread(thread);
*threadptr = thread;
}
ret = 0;
out:
if (dent)
put_dentry(dent);
if (thread)
put_thread(thread);
return ret;
}
