diff options
Diffstat (limited to 'hurd/ctty-input.c')
| -rw-r--r-- | hurd/ctty-input.c | 47 |
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. */ |