Hello.
I don't know if there is any particular reason that support for DISCARD/^O
was not included in the tty rewrite that happened from FreeBSD 7 to 8,
but in case anybody else wants it, here's a diff functioning mostly
like in 7, except output isn't switched back on automatically on input.
Diff is against FreeBSD 8, however, last time I checked I didn't see
much difference in the newer versions.
Regards, Eivind
diff -r 91820d9948e0 -r 13f40d577646 sys/kern/tty_ttydisc.c
--- a/sys/kern/tty_ttydisc.c Fri Feb 22 09:45:32 2013 +0100
+++ b/sys/kern/tty_ttydisc.c Tue Dec 17 23:03:17 2013 +0100
@@ -448,6 +448,9 @@
if (tp->t_flags & TF_ZOMBIE)
return (EIO);
+ if (tp->t_termios.c_lflag & FLUSHO)
+ return (0);
+
/*
* We don't need to check whether the process is the foreground
* process group or if we have a carrier. This is already done
@@ -881,6 +884,14 @@
/* Special control characters that are implementation dependent. */
if (CMP_FLAG(l, IEXTEN)) {
+ /* Discard (^O) */
+ if (CMP_CC(VDISCARD, c)) {
+ if (!(tp->t_termios.c_lflag & FLUSHO))
+ ttyoutq_write_nofrag(&tp->t_outq, "^O", 2);
+ tp->t_termios.c_lflag ^= FLUSHO;
+ return(0);
+ }
+
/* Accept the next character as literal. */
if (CMP_CC(VLNEXT, c)) {
if (CMP_FLAG(l, ECHO)) {
On Tue, Dec 17, 2013 at 10:18:16PM +0100, Eivind Evensen wrote:> Hello. > > I don't know if there is any particular reason that support for DISCARD/^O > was not included in the tty rewrite that happened from FreeBSD 7 to 8, > but in case anybody else wants it, here's a diff functioning mostly > like in 7, except output isn't switched back on automatically on input. > > Diff is against FreeBSD 8, however, last time I checked I didn't see > much difference in the newer versions. > > Regards, EivindNice! Very nice feature, need to commit in the tree.> diff -r 91820d9948e0 -r 13f40d577646 sys/kern/tty_ttydisc.c > --- a/sys/kern/tty_ttydisc.c Fri Feb 22 09:45:32 2013 +0100 > +++ b/sys/kern/tty_ttydisc.c Tue Dec 17 23:03:17 2013 +0100 > @@ -448,6 +448,9 @@ > if (tp->t_flags & TF_ZOMBIE) > return (EIO); > > + if (tp->t_termios.c_lflag & FLUSHO) > + return (0); > + > /* > * We don't need to check whether the process is the foreground > * process group or if we have a carrier. This is already done > @@ -881,6 +884,14 @@ > > /* Special control characters that are implementation dependent. */ > if (CMP_FLAG(l, IEXTEN)) { > + /* Discard (^O) */ > + if (CMP_CC(VDISCARD, c)) { > + if (!(tp->t_termios.c_lflag & FLUSHO)) > + ttyoutq_write_nofrag(&tp->t_outq, "^O", 2); > + tp->t_termios.c_lflag ^= FLUSHO; > + return(0); > + } > + > /* Accept the next character as literal. */ > if (CMP_CC(VLNEXT, c)) { > if (CMP_FLAG(l, ECHO)) { > _______________________________________________ > freebsd-stable at freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe at freebsd.org"
On Tue, Dec 17, 2013 at 10:18:16PM +0100, Eivind Evensen wrote:> Hello. > > I don't know if there is any particular reason that support for DISCARD/^O > was not included in the tty rewrite that happened from FreeBSD 7 to 8, > but in case anybody else wants it, here's a diff functioning mostly > like in 7, except output isn't switched back on automatically on input. > > Diff is against FreeBSD 8, however, last time I checked I didn't see > much difference in the newer versions.Here's a diff against FreeBSD 10. It seems to work fine there too. diff -r 59ad9c4b7916 -r 6e500f4552b4 sys/kern/tty_ttydisc.c --- a/sys/kern/tty_ttydisc.c Fri Jul 04 17:27:59 2014 +0200 +++ b/sys/kern/tty_ttydisc.c Fri Jul 04 17:29:29 2014 +0200 @@ -464,6 +464,9 @@ if (tp->t_flags & TF_ZOMBIE) return (EIO); + if (tp->t_termios.c_lflag & FLUSHO) + return (0); + /* * We don't need to check whether the process is the foreground * process group or if we have a carrier. This is already done @@ -896,6 +899,14 @@ /* Special control characters that are implementation dependent. */ if (CMP_FLAG(l, IEXTEN)) { + /* Discard (^O) */ + if (CMP_CC(VDISCARD, c)) { + if (!(tp->t_termios.c_lflag & FLUSHO)) + ttyoutq_write_nofrag(&tp->t_outq, "^O", 2); + tp->t_termios.c_lflag ^= FLUSHO; + return(0); + } + /* Accept the next character as literal. */ if (CMP_CC(VLNEXT, c)) { if (CMP_FLAG(l, ECHO)) {