diff options
Diffstat (limited to 'sysdeps/mach/hurd')
| -rw-r--r-- | sysdeps/mach/hurd/sigwait.c | 136 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/ttyname_r.c | 4 |
2 files changed, 138 insertions, 2 deletions
diff --git a/sysdeps/mach/hurd/sigwait.c b/sysdeps/mach/hurd/sigwait.c new file mode 100644 index 0000000000..b3916f83ae --- /dev/null +++ b/sysdeps/mach/hurd/sigwait.c @@ -0,0 +1,136 @@ +/* Copyright (C) 1996 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 +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <errno.h> +#include <hurd.h> +#include <hurd/signal.h> +#include <hurd/msg.h> +#include <hurd/sigpreempt.h> +#include <assert.h> + +/* Select any of pending signals from SET or wait for any to arrive. */ +int +__sigwait (const sigset_t *set, int *sig) +{ + struct hurd_sigstate *ss; + sigset_t mask; + int signo = 0; + struct hurd_signal_preempter preempter; + jmp_buf buf; + mach_port_t wait; + mach_msg_header_t msg; + + sighandler_t + preempt_fun (struct hurd_signal_preempter *pe, + struct hurd_sigstate *ss, + int *sigp, + struct hurd_signal_detail *detail) + { + if (signo) + /* We've already been run; don't interfere. */ + return SIG_ERR; + + signo = *sigp; + + /* Make sure this is all kosher */ + assert (__sigismember (&mask, signo)); + + /* Make sure this signal is unblocked */ + __sigdelset (&ss->blocked, signo); + + return pe->handler; + } + + void + handler (int sig) + { + assert (sig == signo); + longjmp (buf, 1); + } + + wait = __mach_reply_port (); + + if (set != NULL) + /* Crash before locking */ + mask = *set; + + ss = _hurd_self_sigstate (); + __spin_lock (&ss->lock); + + /* See if one of these signals is currently pending */ + if (ss->pending & mask) + { + for (signo = 1; signo < NSIG; signo++) + if (__sigismember (&ss->pending, signo)) + { + __sigdelset (&ss->pending, signo); + goto all_done; + } + /* Huh? Where'd it go? */ + abort (); + } + + /* Wait for one of them to show up */ + + if (!setjmp (buf)) + { + /* Make the preempter */ + preempter.signals = mask; + preempter.first = 0; + preempter.last = -1; + preempter.preempter = preempt_fun; + preempter.handler = handler; + + /* Install this preempter */ + preempter.next = ss->preempters; + ss->preempters = &preempter; + + __spin_unlock (&ss->lock); + + /* Wait. */ + __mach_msg (&msg, MACH_RCV_MSG, 0, sizeof (msg), wait, + MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); + abort (); + } + else + { + assert (signo); + + __spin_lock (&ss->lock); + + /* Delete our preempter. */ + assert (ss->preempters == &preempter); + ss->preempters = preempter.next; + } + + +all_done: + /* Cause the pointless side-effect. */ + __sigfillset (&ss->blocked); + for (signo = 1; signo < NSIG; signo++) + if (__sigismember (&mask, signo)) + __sigdelset (&ss->blocked, signo); + + spin_unlock (&ss->lock); + + __mach_port_destroy (__mach_task_self (), wait); + *sig = signo; + return 0; +} + +weak_alias (__sigwait, sigwait) diff --git a/sysdeps/mach/hurd/ttyname_r.c b/sysdeps/mach/hurd/ttyname_r.c index 67ff37d61c..f958dd9e4f 100644 --- a/sysdeps/mach/hurd/ttyname_r.c +++ b/sysdeps/mach/hurd/ttyname_r.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1994, 1995 Free Software Foundation, Inc. +/* Copyright (C) 1994, 1995, 1996 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 @@ -26,7 +26,7 @@ Cambridge, MA 02139, USA. */ /* Store at most BUFLEN characters of the pathname of the terminal FD is open on in BUF. Return 0 on success, -1 otherwise. */ int -ttyname_r (int fd, char *buf, int buflen) +ttyname_r (int fd, char *buf, size_t buflen) { error_t err; char nodename[1024]; /* XXX */ |