diff options
Diffstat (limited to 'contrib/tcsh/tc.sig.c')
| -rw-r--r-- | contrib/tcsh/tc.sig.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/contrib/tcsh/tc.sig.c b/contrib/tcsh/tc.sig.c new file mode 100644 index 0000000..92bc798 --- /dev/null +++ b/contrib/tcsh/tc.sig.c @@ -0,0 +1,151 @@ +/* $Header: /p/tcsh/cvsroot/tcsh/tc.sig.c,v 3.40 2012/01/25 15:34:41 christos Exp $ */ +/* + * tc.sig.c: Signal routine emulations + */ +/*- + * Copyright (c) 1980, 1991 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +#include "sh.h" + +RCSID("$tcsh: tc.sig.c,v 3.40 2012/01/25 15:34:41 christos Exp $") + +#include "tc.wait.h" + +void +sigset_interrupting(int sig, void (*fn) (int)) +{ + struct sigaction act; + + act.sa_handler = fn; + sigemptyset(&act.sa_mask); + act.sa_flags = 0; + if (sigaction(sig, &act, NULL) == 0) { + sigset_t set; + sigemptyset(&set); + sigaddset(&set, sig); + sigprocmask(SIG_UNBLOCK, &set, NULL); + } +} + +static volatile sig_atomic_t alrmcatch_pending; /* = 0; */ +static volatile sig_atomic_t pchild_pending; /* = 0; */ +static volatile sig_atomic_t phup_pending; /* = 0; */ +static volatile sig_atomic_t pintr_pending; /* = 0; */ +int alrmcatch_disabled; /* = 0; */ +int phup_disabled; /* = 0; */ +int pchild_disabled; /* = 0; */ +int pintr_disabled; /* = 0; */ +int handle_interrupt; /* = 0; */ + +int +handle_pending_signals(void) +{ + int rv = 0; + if (!phup_disabled && phup_pending) { + phup_pending = 0; + handle_interrupt++; + phup(); + handle_interrupt--; + } + if (!pintr_disabled && pintr_pending) { + pintr_pending = 0; + handle_interrupt++; + pintr(); + handle_interrupt--; + rv = 1; + } + if (!pchild_disabled && pchild_pending) { + pchild_pending = 0; + handle_interrupt++; + pchild(); + handle_interrupt--; + } + if (!alrmcatch_disabled && alrmcatch_pending) { + alrmcatch_pending = 0; + handle_interrupt++; + alrmcatch(); + handle_interrupt--; + } + return rv; +} + +void +queue_alrmcatch(int sig) +{ + USE(sig); + alrmcatch_pending = 1; +} + +void +queue_pchild(int sig) +{ + USE(sig); + pchild_pending = 1; +} + +void +queue_phup(int sig) +{ + USE(sig); + phup_pending = 1; +} + +void +queue_pintr(int sig) +{ + USE(sig); + pintr_pending = 1; +} + +void +disabled_cleanup(void *xdisabled) +{ + int *disabled; + + disabled = xdisabled; + if (--*disabled == 0) + handle_pending_signals(); +} + +void +pintr_disabled_restore(void *xold) +{ + int *old; + + old = xold; + pintr_disabled = *old; +} + +void +pintr_push_enable(int *saved) +{ + *saved = pintr_disabled; + pintr_disabled = 0; + cleanup_push(saved, pintr_disabled_restore); + handle_pending_signals(); +} |
