/* Helper, copies a pathname from the process into the kernel. Returns a string
* on success, which you must free with free_path. Returns 0 on failure and
* sets errno. */
char *copy_in_path(struct proc *p, const char *path, size_t path_l)
{
struct per_cpu_info *pcpui = &per_cpu_info[core_id()];
char *t_path;
/* PATH_MAX includes the \0 */
if (path_l > PATH_MAX) {
set_errno(ENAMETOOLONG);
return 0;
}
t_path = user_strdup_errno(p, path, path_l);
if (!t_path)
return 0;
return t_path;
}
ssize_t dev_stdout_write(struct file *file, const char *buf, size_t count,
off64_t *offset)
{
char *t_buf;
struct proc *p = current;
if (p)
t_buf = user_strdup_errno(p, buf, count);
else
t_buf = (char*)buf;
if (!t_buf)
return -1;
/* TODO: tty hack. they are sending us an escape sequence, and the keyboard
* would try to print it (which it can't do yet). The hack is even dirtier
* in that we only detect it if it is the first char, and we ignore
* everything else. */
if (t_buf[0] == '\033') /* 0x1b */
return count;
cputbuf(t_buf, count);
return count;
}
