diff options
Diffstat (limited to 'lib/libc/gen/signal.c')
-rw-r--r-- | lib/libc/gen/signal.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/lib/libc/gen/signal.c b/lib/libc/gen/signal.c new file mode 100644 index 0000000..c93633e --- /dev/null +++ b/lib/libc/gen/signal.c @@ -0,0 +1,61 @@ +/* + * Copyright (c) 1985, 1989, 1993 + * 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. + * 4. 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Almost backwards compatible signal. + */ +#include "namespace.h" +#include <signal.h> +#include "un-namespace.h" +#include "libc_private.h" + +sigset_t _sigintr; /* shared with siginterrupt */ + +sig_t +signal(s, a) + int s; + sig_t a; +{ + struct sigaction sa, osa; + + sa.sa_handler = a; + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + if (!sigismember(&_sigintr, s)) + sa.sa_flags |= SA_RESTART; + if (_sigaction(s, &sa, &osa) < 0) + return (SIG_ERR); + return (osa.sa_handler); +} |