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.
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Roland McGrath
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e441971517
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12
ChangeLog
12
ChangeLog
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@ -1,3 +1,15 @@
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1999-03-09 Roland McGrath <roland@baalperazim.frob.com>
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* sysdeps/mach/hurd/ioctl.c (__ioctl): Move the marshalling of the
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arguments into the request message buffer inside `send_rpc'
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subfunction. We must repeat the marshalling when retrying the RPC
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after a SIGTTOU delivery.
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* hurd/ctty-input.c (_hurd_ctty_input): Use early short-circuit code
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path when there is no ctty port.
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* hurd/ctty-output.c (_hurd_ctty_output): Likewise.
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Move sigstate check inside loop so we recheck after handling a signal.
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1999-03-05 Andreas Jaeger <aj@arthur.rhein-neckar.de>
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* manual/llio.texi (Open-time Flags): Clarify that O_SHLOCK and
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@ -1,5 +1,5 @@
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/* _hurd_ctty_input -- Do an input RPC and generate SIGTTIN if necessary.
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Copyright (C) 1995, 1997 Free Software Foundation, Inc.
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Copyright (C) 1995,97,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -28,46 +28,49 @@ _hurd_ctty_input (io_t port, io_t ctty, error_t (*rpc) (io_t))
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{
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error_t err;
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if (ctty == MACH_PORT_NULL)
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return (*rpc) (port);
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do
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{
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err = (*rpc) (ctty != MACH_PORT_NULL ? ctty : port);
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if (ctty != MACH_PORT_NULL && err == EBACKGROUND)
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err = (*rpc) (ctty);
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if (err == EBACKGROUND)
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{
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/* We are a background job and tried to read from the tty.
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We should probably get a SIGTTIN signal. */
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struct hurd_sigstate *ss;
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if (_hurd_orphaned)
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/* Our process group is orphaned. Don't stop; just fail. */
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err = EIO;
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else
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{
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ss = _hurd_self_sigstate ();
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struct hurd_sigstate *ss = _hurd_self_sigstate ();
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__spin_lock (&ss->lock);
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if (__sigismember (&ss->blocked, SIGTTIN) ||
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ss->actions[SIGTTIN].sa_handler == SIG_IGN)
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/* We are blocking or ignoring SIGTTIN. Just fail. */
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err = EIO;
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__spin_unlock (&ss->lock);
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}
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if (err == EBACKGROUND)
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{
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/* Send a SIGTTIN signal to our process group.
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We must remember here not to clobber ERR, since
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the loop condition below uses it to recall that
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we should retry after a stop. */
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if (err == EBACKGROUND)
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{
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/* Send a SIGTTIN signal to our process group.
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__USEPORT (CTTYID, _hurd_sig_post (0, SIGTTIN, port));
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/* XXX what to do if error here? */
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We must remember here not to clobber ERR, since
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the loop condition below uses it to recall that
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we should retry after a stop. */
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/* At this point we should have just run the handler for
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SIGTTIN or resumed after being stopped. Now this is
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still a "system call", so check to see if we should
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restart it. */
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__spin_lock (&ss->lock);
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if (!(ss->actions[SIGTTIN].sa_flags & SA_RESTART))
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err = EINTR;
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__spin_unlock (&ss->lock);
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__USEPORT (CTTYID, _hurd_sig_post (0, SIGTTIN, port));
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/* XXX what to do if error here? */
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/* At this point we should have just run the handler for
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SIGTTIN or resumed after being stopped. Now this is
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still a "system call", so check to see if we should
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restart it. */
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__spin_lock (&ss->lock);
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if (!(ss->actions[SIGTTIN].sa_flags & SA_RESTART))
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err = EINTR;
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__spin_unlock (&ss->lock);
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}
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}
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}
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/* If the last RPC generated a SIGTTIN, loop to try it again. */
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@ -1,5 +1,5 @@
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/* _hurd_ctty_output -- Do an output RPC and generate SIGTTOU if necessary.
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Copyright (C) 1995, 1997 Free Software Foundation, Inc.
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Copyright (C) 1995,97,99 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -26,57 +26,60 @@
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error_t
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_hurd_ctty_output (io_t port, io_t ctty, error_t (*rpc) (io_t))
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{
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error_t err;
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struct hurd_sigstate *ss;
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io_t ioport;
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/* Don't use the ctty io port if we are blocking or ignoring SIGTTOU. */
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if (ctty == MACH_PORT_NULL)
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ioport = port;
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return (*rpc) (port);
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else
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{
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ss = _hurd_self_sigstate ();
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__spin_lock (&ss->lock);
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if (__sigismember (&ss->blocked, SIGTTOU) ||
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ss->actions[SIGTTOU].sa_handler == SIG_IGN)
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ioport = port;
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else
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ioport = ctty;
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__spin_unlock (&ss->lock);
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}
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struct hurd_sigstate *ss = _hurd_self_sigstate ();
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error_t err;
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do
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{
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err = (*rpc) (ioport);
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if (ioport == ctty && err == EBACKGROUND)
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do
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{
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if (_hurd_orphaned)
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/* Our process group is orphaned, so we never generate a
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signal; we just fail. */
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/* Don't use the ctty io port if we are blocking or ignoring
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SIGTTOU. We redo this check at the top of the loop in case
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the signal handler changed the state. */
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__spin_lock (&ss->lock);
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if (__sigismember (&ss->blocked, SIGTTOU) ||
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ss->actions[SIGTTOU].sa_handler == SIG_IGN)
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err = EIO;
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else
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err = 0;
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__spin_unlock (&ss->lock);
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if (err)
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return (*rpc) (port);
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err = (*rpc) (ctty);
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if (err == EBACKGROUND)
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{
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/* Send a SIGTTOU signal to our process group.
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if (_hurd_orphaned)
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/* Our process group is orphaned, so we never generate a
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signal; we just fail. */
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err = EIO;
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else
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{
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/* Send a SIGTTOU signal to our process group.
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We must remember here not to clobber ERR, since
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the loop condition below uses it to recall that
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we should retry after a stop. */
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We must remember here not to clobber ERR, since
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the loop condition below uses it to recall that
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we should retry after a stop. */
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__USEPORT (CTTYID, _hurd_sig_post (0, SIGTTOU, port));
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/* XXX what to do if error here? */
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__USEPORT (CTTYID, _hurd_sig_post (0, SIGTTOU, port));
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/* XXX what to do if error here? */
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/* At this point we should have just run the handler for
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SIGTTOU or resumed after being stopped. Now this is
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still a "system call", so check to see if we should
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restart it. */
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__spin_lock (&ss->lock);
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if (!(ss->actions[SIGTTOU].sa_flags & SA_RESTART))
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err = EINTR;
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__spin_unlock (&ss->lock);
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/* At this point we should have just run the handler for
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SIGTTOU or resumed after being stopped. Now this is
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still a "system call", so check to see if we should
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restart it. */
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__spin_lock (&ss->lock);
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if (!(ss->actions[SIGTTOU].sa_flags & SA_RESTART))
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err = EINTR;
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__spin_unlock (&ss->lock);
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}
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}
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}
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/* If the last RPC generated a SIGTTOU, loop to try it again. */
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} while (err == EBACKGROUND);
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/* If the last RPC generated a SIGTTOU, loop to try it again. */
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} while (err == EBACKGROUND);
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return err;
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return err;
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}
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}
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