void show_prompt(t_char **list, char **envp)
{
char rd[4];
rd[0] = 1;
while (rd[0] || rd[1] || rd[2] || rd[3])
{
sig_set();
ft_bzero(rd, 4);
read(0, rd, 4);
test_key(rd, list, envp);
}
}
libedit_private void
read_prepare(EditLine *el)
{
if (el->el_flags & HANDLE_SIGNALS)
sig_set(el);
if (el->el_flags & NO_TTY)
return;
if ((el->el_flags & (UNBUFFERED|EDIT_DISABLED)) == UNBUFFERED)
tty_rawmode(el);
/* This is relatively cheap, and things go terribly wrong if
we have the wrong size. */
el_resize(el);
re_clear_display(el); /* reset the display stuff */
ch_reset(el);
re_refresh(el); /* print the prompt */
if (el->el_flags & UNBUFFERED)
terminal__flush(el);
}
/* read_char():
* Read a character from the tty.
*/
static int
read_char(EditLine *el, wchar_t *cp)
{
ssize_t num_read;
int tried = 0;
char cbuf[MB_LEN_MAX];
size_t cbp = 0;
int save_errno = errno;
again:
el->el_signal->sig_no = 0;
while ((num_read = read(el->el_infd, cbuf + cbp, (size_t)1)) == -1) {
int e = errno;
switch (el->el_signal->sig_no) {
case SIGCONT:
el_wset(el, EL_REFRESH);
/*FALLTHROUGH*/
case SIGWINCH:
sig_set(el);
goto again;
default:
break;
}
if (!tried && read__fixio(el->el_infd, e) == 0) {
errno = save_errno;
tried = 1;
} else {
errno = e;
*cp = L'\0';
return -1;
}
}
/* Test for EOF */
if (num_read == 0) {
*cp = L'\0';
return 0;
}
for (;;) {
mbstate_t mbs;
++cbp;
/* This only works because UTF8 is stateless. */
memset(&mbs, 0, sizeof(mbs));
switch (mbrtowc(cp, cbuf, cbp, &mbs)) {
case (size_t)-1:
if (cbp > 1) {
/*
* Invalid sequence, discard all bytes
* except the last one.
*/
cbuf[0] = cbuf[cbp - 1];
cbp = 0;
break;
} else {
/* Invalid byte, discard it. */
cbp = 0;
goto again;
}
case (size_t)-2:
/*
* We don't support other multibyte charsets.
* The second condition shouldn't happen
* and is here merely for additional safety.
*/
if ((el->el_flags & CHARSET_IS_UTF8) == 0 ||
cbp >= MB_LEN_MAX) {
errno = EILSEQ;
*cp = L'\0';
return -1;
}
/* Incomplete sequence, read another byte. */
goto again;
default:
/* Valid character, process it. */
return 1;
}
}
}
