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authorRoland McGrath <roland@gnu.org>1999-03-08 21:02:22 +0000
committerRoland McGrath <roland@gnu.org>1999-03-08 21:02:22 +0000
commit1d67062e53fe823c5b9f803b082cccef47e1e729 (patch)
tree34d94f0494a3c8a8383dda180074804dd1f26620 /hurd/ctty-input.c
parente4419715172bda2b260daa9afd757eca861cb90e (diff)
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1999-03-09 Roland McGrath <roland@baalperazim.frob.com>
* sysdeps/mach/hurd/ioctl.c (__ioctl): Move the marshalling of the arguments into the request message buffer inside `send_rpc' subfunction. We must repeat the marshalling when retrying the RPC after a SIGTTOU delivery. * hurd/ctty-input.c (_hurd_ctty_input): Use early short-circuit code path when there is no ctty port. * hurd/ctty-output.c (_hurd_ctty_output): Likewise. Move sigstate check inside loop so we recheck after handling a signal.
Diffstat (limited to 'hurd/ctty-input.c')
-rw-r--r--hurd/ctty-input.c47
1 files changed, 25 insertions, 22 deletions
diff --git a/hurd/ctty-input.c b/hurd/ctty-input.c
index 95e016951b..10a8461b5c 100644
--- a/hurd/ctty-input.c
+++ b/hurd/ctty-input.c
@@ -1,5 +1,5 @@
/* _hurd_ctty_input -- Do an input RPC and generate SIGTTIN if necessary.
- Copyright (C) 1995, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1995,97,99 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -28,46 +28,49 @@ _hurd_ctty_input (io_t port, io_t ctty, error_t (*rpc) (io_t))
{
error_t err;
+ if (ctty == MACH_PORT_NULL)
+ return (*rpc) (port);
+
do
{
- err = (*rpc) (ctty != MACH_PORT_NULL ? ctty : port);
- if (ctty != MACH_PORT_NULL && err == EBACKGROUND)
+ err = (*rpc) (ctty);
+ if (err == EBACKGROUND)
{
/* We are a background job and tried to read from the tty.
We should probably get a SIGTTIN signal. */
- struct hurd_sigstate *ss;
if (_hurd_orphaned)
/* Our process group is orphaned. Don't stop; just fail. */
err = EIO;
else
{
- ss = _hurd_self_sigstate ();
+ struct hurd_sigstate *ss = _hurd_self_sigstate ();
__spin_lock (&ss->lock);
if (__sigismember (&ss->blocked, SIGTTIN) ||
ss->actions[SIGTTIN].sa_handler == SIG_IGN)
/* We are blocking or ignoring SIGTTIN. Just fail. */
err = EIO;
__spin_unlock (&ss->lock);
- }
- if (err == EBACKGROUND)
- {
- /* Send a SIGTTIN signal to our process group.
- We must remember here not to clobber ERR, since
- the loop condition below uses it to recall that
- we should retry after a stop. */
+ if (err == EBACKGROUND)
+ {
+ /* Send a SIGTTIN signal to our process group.
- __USEPORT (CTTYID, _hurd_sig_post (0, SIGTTIN, port));
- /* XXX what to do if error here? */
+ We must remember here not to clobber ERR, since
+ the loop condition below uses it to recall that
+ we should retry after a stop. */
- /* At this point we should have just run the handler for
- SIGTTIN or resumed after being stopped. Now this is
- still a "system call", so check to see if we should
- restart it. */
- __spin_lock (&ss->lock);
- if (!(ss->actions[SIGTTIN].sa_flags & SA_RESTART))
- err = EINTR;
- __spin_unlock (&ss->lock);
+ __USEPORT (CTTYID, _hurd_sig_post (0, SIGTTIN, port));
+ /* XXX what to do if error here? */
+
+ /* At this point we should have just run the handler for
+ SIGTTIN or resumed after being stopped. Now this is
+ still a "system call", so check to see if we should
+ restart it. */
+ __spin_lock (&ss->lock);
+ if (!(ss->actions[SIGTTIN].sa_flags & SA_RESTART))
+ err = EINTR;
+ __spin_unlock (&ss->lock);
+ }
}
}
/* If the last RPC generated a SIGTTIN, loop to try it again. */