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tty: support more flags

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This commit is contained in:
K. Lange 2018-10-05 21:57:15 +09:00
parent 4943ae462d
commit 2d26e2f490
1 changed files with 78 additions and 36 deletions
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114
kernel/fs/tty.c
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@ -62,50 +62,35 @@ static void clear_input_buffer(pty_t * pty) {
pty->canon_buffer[0] = '\0';
}
static void output_process(pty_t * pty, uint8_t c) {
if (ring_buffer_available(pty->out) < 2) return; /* uh oh */
static void output_process_slave(pty_t * pty, uint8_t c) {
if (c == '\n' && (pty->tios.c_oflag & ONLCR)) {
uint8_t d = '\r';
OUT(d);
c = '\n';
OUT(c);
c = '\r';
OUT(c);
return;
}
if (c == '\r' && (pty->tios.c_oflag & ONLRET)) {
return;
}
if (c >= 'a' && c <= 'z' && (pty->tios.c_oflag & OLCUC)) {
c = c + 'a' - 'A';
OUT(c);
return;
}
OUT(c);
}
static void output_process_slave(pty_t * pty, uint8_t c) {
if (c == '\n' && (pty->tios.c_oflag & ONLCR)) {
uint8_t d = '\r';
OUT(d);
}
OUT(c);
static void output_process(pty_t * pty, uint8_t c) {
if (ring_buffer_available(pty->out) < 2) return; /* uh oh */
output_process_slave(pty, c);
}
static void input_process(pty_t * pty, uint8_t c) {
if (pty->tios.c_lflag & ICANON) {
if (c == pty->tios.c_cc[VKILL]) {
while (pty->canon_buflen > 0) {
pty->canon_buflen--;
pty->canon_buffer[pty->canon_buflen] = '\0';
if (pty->tios.c_lflag & ECHO) {
output_process(pty, '\010');
output_process(pty, ' ');
output_process(pty, '\010');
}
}
return;
}
if (c == pty->tios.c_cc[VERASE]) {
/* Backspace */
if (pty->canon_buflen > 0) {
pty->canon_buflen--;
pty->canon_buffer[pty->canon_buflen] = '\0';
if (pty->tios.c_lflag & ECHO) {
output_process(pty, '\010');
output_process(pty, ' ');
output_process(pty, '\010');
}
}
return;
}
if (pty->tios.c_lflag & ISIG) {
if (c == pty->tios.c_cc[VINTR]) {
if (pty->tios.c_lflag & ECHO) {
output_process(pty, '^');
@ -130,6 +115,39 @@ static void input_process(pty_t * pty, uint8_t c) {
}
return;
}
/* VSUSP */
}
#if 0
if (pty->tios.c_lflag & IXON ) {
/* VSTOP, VSTART */
}
#endif
if (pty->tios.c_lflag & ICANON) {
if (c == pty->tios.c_cc[VKILL]) {
while (pty->canon_buflen > 0) {
pty->canon_buflen--;
pty->canon_buffer[pty->canon_buflen] = '\0';
if ((pty->tios.c_lflag & ECHO) && (pty->tios.c_lflag & ECHOK)) {
output_process(pty, '\010');
output_process(pty, ' ');
output_process(pty, '\010');
}
}
return;
}
if (c == pty->tios.c_cc[VERASE]) {
/* Backspace */
if (pty->canon_buflen > 0) {
pty->canon_buflen--;
pty->canon_buffer[pty->canon_buflen] = '\0';
if ((pty->tios.c_lflag & ECHO) && (pty->tios.c_lflag & ECHOE)) {
output_process(pty, '\010');
output_process(pty, ' ');
output_process(pty, '\010');
}
}
return;
}
if (c == pty->tios.c_cc[VEOF]) {
if (pty->canon_buflen) {
dump_input_buffer(pty);
@ -138,6 +156,27 @@ static void input_process(pty_t * pty, uint8_t c) {
}
return;
}
/* ISTRIP: Strip eighth bit */
if (pty->tios.c_iflag & ISTRIP) {
c &= 0x7F;
}
/* IGNCR: Ignore carriage return. */
if ((pty->tios.c_iflag & IGNCR) && c == '\r') {
return;
}
/* INLCR: Translate NL to CR. */
if ((pty->tios.c_iflag & INLCR) && c == '\n') {
c = '\r';
}
/* ICRNL: Convert carriage return. */
if ((pty->tios.c_iflag & ICRNL) && c == '\r') {
c = '\n';
}
if (pty->canon_buflen < pty->canon_bufsize) {
pty->canon_buffer[pty->canon_buflen] = c;
pty->canon_buflen++;
@ -146,6 +185,9 @@ static void input_process(pty_t * pty, uint8_t c) {
output_process(pty, c);
}
if (c == '\n') {
if (!(pty->tios.c_lflag & ECHO) && (pty->tios.c_lflag & ECHONL)) {
output_process(pty, c);
}
pty->canon_buffer[pty->canon_buflen-1] = c;
dump_input_buffer(pty);
return;