diff options
Diffstat (limited to 'REORG.TODO/sysdeps/posix/sysv_signal.c')
-rw-r--r-- | REORG.TODO/sysdeps/posix/sysv_signal.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/posix/sysv_signal.c b/REORG.TODO/sysdeps/posix/sysv_signal.c new file mode 100644 index 0000000000..6893ec23e4 --- /dev/null +++ b/REORG.TODO/sysdeps/posix/sysv_signal.c @@ -0,0 +1,58 @@ +/* Copyright (C) 1991-2017 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <signal.h> +#include <string.h> /* For the real memset prototype. */ +#include <sigsetops.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 (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; + __sigemptyset (&act.sa_mask); + 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; +} + +weak_alias (__sysv_signal, sysv_signal) |