diff options
Diffstat (limited to 'libc/unistd/signal.c')
-rw-r--r-- | libc/unistd/signal.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libc/unistd/signal.c b/libc/unistd/signal.c new file mode 100644 index 0000000..949db13 --- /dev/null +++ b/libc/unistd/signal.c @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2008 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 + * COPYRIGHT OWNER 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 <signal.h> + + +static __sighandler_t +_signal(int signum, __sighandler_t handler, int flags) +{ + struct sigaction sa; + __sighandler_t result = SIG_ERR; + + sigemptyset( &sa.sa_mask ); + + sa.sa_handler = handler; + sa.sa_flags = flags; + + if ( !sigaction( signum, &sa, &sa ) ) + result = (__sighandler_t) sa.sa_handler; + + return result; +} + + +__sighandler_t bsd_signal(int signum, __sighandler_t handler) +{ + return _signal(signum, handler, SA_RESTART); +} + +__sighandler_t sysv_signal(int signum, __sighandler_t handler) +{ + return _signal(signum, handler, SA_RESETHAND); +} |