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author | Ulrich Drepper <drepper@redhat.com> | 1997-01-06 22:07:28 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1997-01-06 22:07:28 +0000 |
commit | df4ef2ab9c0899b2670067cd97e58f7eb2913e00 (patch) | |
tree | 4cb343b5ba9ccdc9c0b96144412567b6a4eda0ee /sysdeps/posix/sysv_signal.c | |
parent | 6f9e7002f38ae778b3ff2f586a3e5766382228e9 (diff) | |
download | glibc-df4ef2ab9c0899b2670067cd97e58f7eb2913e00.zip glibc-df4ef2ab9c0899b2670067cd97e58f7eb2913e00.tar.gz glibc-df4ef2ab9c0899b2670067cd97e58f7eb2913e00.tar.bz2 |
update from main archive 960105cvs/libc-970107cvs/libc-970106
Diffstat (limited to 'sysdeps/posix/sysv_signal.c')
-rw-r--r-- | sysdeps/posix/sysv_signal.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/sysdeps/posix/sysv_signal.c b/sysdeps/posix/sysv_signal.c new file mode 100644 index 0000000..2b6d5f9 --- /dev/null +++ b/sysdeps/posix/sysv_signal.c @@ -0,0 +1,58 @@ +/* Copyright (C) 1991, 1992, 1996, 1997 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., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <signal.h> + +/* Tolerate non-threads versions of Posix */ +#ifndef SA_ONESHOT +#define SA_ONESHOT 0 +#endif +#ifndef SA_NOMASK +#define SA_NOMASK 0 +#endif +#ifndef SA_INTERRUPT +#define SA_INTERRUPT 0 +#endif + +/* Set the handler for the signal SIG to HANDLER, + returning the old handler, or SIG_ERR on error. */ +__sighandler_t +__sysv_signal (sig, handler) + int sig; + __sighandler_t handler; +{ + struct sigaction act, oact; + + /* Check signal extents to protect __sigismember. */ + if (handler == SIG_ERR || sig < 1 || sig >= NSIG) + { + __set_errno (EINVAL); + return SIG_ERR; + } + + act.sa_handler = handler; + if (__sigemptyset (&act.sa_mask) < 0) + return SIG_ERR; + act.sa_flags = SA_ONESHOT | SA_NOMASK | SA_INTERRUPT; + act.sa_flags &= ~SA_RESTART; + if (__sigaction (sig, &act, &oact) < 0) + return SIG_ERR; + + return oact.sa_handler; +} |