mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 16:50:07 +00:00
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Copyright (C) 1997-2020 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
|
|
/* New ports should not define the obsolete SA_RESTORER, however some
|
|
architecture requires for compat mode and/or due old ABI. */
|
|
#include <kernel_sigaction.h>
|
|
|
|
#ifndef SA_RESTORER
|
|
# define SET_SA_RESTORER(kact, act)
|
|
# define RESET_SA_RESTORER(act, kact)
|
|
#endif
|
|
|
|
/* SPARC passes the restore function as an argument to rt_sigaction. */
|
|
#ifndef STUB
|
|
# define STUB(act, sigsetsize) (sigsetsize)
|
|
#endif
|
|
|
|
/* If ACT is not NULL, change the action for SIG to *ACT.
|
|
If OACT is not NULL, put the old action for SIG in *OACT. */
|
|
int
|
|
__libc_sigaction (int sig, const struct sigaction *act, struct sigaction *oact)
|
|
{
|
|
int result;
|
|
|
|
struct kernel_sigaction kact, koact;
|
|
|
|
if (act)
|
|
{
|
|
kact.k_sa_handler = act->sa_handler;
|
|
memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
|
|
kact.sa_flags = act->sa_flags;
|
|
SET_SA_RESTORER (&kact, act);
|
|
}
|
|
|
|
/* XXX The size argument hopefully will have to be changed to the
|
|
real size of the user-level sigset_t. */
|
|
result = INLINE_SYSCALL_CALL (rt_sigaction, sig,
|
|
act ? &kact : NULL,
|
|
oact ? &koact : NULL, STUB (act, _NSIG / 8));
|
|
|
|
if (oact && result >= 0)
|
|
{
|
|
oact->sa_handler = koact.k_sa_handler;
|
|
memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
|
|
oact->sa_flags = koact.sa_flags;
|
|
RESET_SA_RESTORER (oact, &koact);
|
|
}
|
|
return result;
|
|
}
|
|
libc_hidden_def (__libc_sigaction)
|
|
|
|
#include <nptl/sigaction.c>
|