2014-11-15 02:52:16 +08:00
|
|
|
/* ABI compatibility for obsolete sigvec function from 4.2BSD.
|
2022-01-02 02:54:23 +08:00
|
|
|
Copyright (C) 1991-2022 Free Software Foundation, Inc.
|
1997-06-24 05:55:26 +08:00
|
|
|
This file is part of the GNU C Library.
|
1995-02-18 09:27:10 +08:00
|
|
|
|
1997-06-24 05:55:26 +08:00
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
2001-07-06 12:58:11 +08:00
|
|
|
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.
|
1995-02-18 09:27:10 +08:00
|
|
|
|
1997-06-24 05:55:26 +08:00
|
|
|
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
|
2001-07-06 12:58:11 +08:00
|
|
|
Lesser General Public License for more details.
|
1995-02-18 09:27:10 +08:00
|
|
|
|
2001-07-06 12:58:11 +08:00
|
|
|
You should have received a copy of the GNU Lesser General Public
|
2012-02-10 07:18:22 +08:00
|
|
|
License along with the GNU C Library; if not, see
|
Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 13:40:42 +08:00
|
|
|
<https://www.gnu.org/licenses/>. */
|
1995-02-18 09:27:10 +08:00
|
|
|
|
2014-11-15 02:52:16 +08:00
|
|
|
#include <shlib-compat.h>
|
|
|
|
|
|
|
|
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_21)
|
|
|
|
|
|
|
|
# include <signal.h>
|
|
|
|
# include <errno.h>
|
|
|
|
# include <stddef.h>
|
|
|
|
|
|
|
|
|
|
|
|
/* These are the struct sigvec and SV_* bit definitions that
|
|
|
|
used to be in <signal.h>. The whole interface now exists
|
|
|
|
solely for ABI compatibility, so it can just be here. */
|
|
|
|
struct sigvec
|
|
|
|
{
|
|
|
|
__sighandler_t sv_handler; /* Signal handler. */
|
|
|
|
int sv_mask; /* Mask of signals to be blocked. */
|
|
|
|
|
|
|
|
int sv_flags; /* Flags (see below). */
|
|
|
|
};
|
|
|
|
# define SV_ONSTACK (1 << 0)/* Take the signal on the signal stack. */
|
|
|
|
# define SV_INTERRUPT (1 << 1)/* Do not restart system calls. */
|
|
|
|
# define SV_RESETHAND (1 << 2)/* Reset handler to SIG_DFL on receipt. */
|
|
|
|
|
|
|
|
|
|
|
|
/* Include macros to convert between `sigset_t' and old-style mask. */
|
|
|
|
# include <sigset-cvt-mask.h>
|
|
|
|
|
|
|
|
# ifndef SA_RESETHAND
|
|
|
|
/* When sigaction lacks the extension bit for it,
|
|
|
|
we use a wrapper handler to support SV_RESETHAND. */
|
|
|
|
struct sigvec_wrapper_data
|
|
|
|
{
|
|
|
|
__sighandler_t sw_handler;
|
|
|
|
unsigned int sw_mask;
|
|
|
|
};
|
|
|
|
|
|
|
|
static void sigvec_wrapper_handler (int sig) __THROW;
|
|
|
|
|
|
|
|
static struct sigvec_wrapper_data sigvec_wrapper_data[NSIG];
|
|
|
|
# endif
|
|
|
|
|
1995-02-18 09:27:10 +08:00
|
|
|
|
|
|
|
/* If VEC is non-NULL, set the handler for SIG to the `sv_handler' member
|
|
|
|
of VEC. The signals in `sv_mask' will be blocked while the handler runs.
|
|
|
|
If the SV_RESETHAND bit is set in `sv_flags', the handler for SIG will be
|
|
|
|
reset to SIG_DFL before `sv_handler' is entered. If OVEC is non-NULL,
|
|
|
|
it is filled in with the old information for SIG. */
|
|
|
|
int
|
2014-11-15 02:52:16 +08:00
|
|
|
__sigvec (int sig,
|
|
|
|
const struct sigvec *vec,
|
|
|
|
struct sigvec *ovec)
|
|
|
|
{
|
|
|
|
struct sigaction old;
|
|
|
|
|
|
|
|
# ifndef SA_RESETHAND
|
|
|
|
if (vec == NULL || !(vec->sv_flags & SV_RESETHAND))
|
|
|
|
# endif
|
|
|
|
{
|
|
|
|
struct sigaction new, *n;
|
|
|
|
|
|
|
|
if (vec == NULL)
|
|
|
|
n = NULL;
|
|
|
|
else
|
|
|
|
{
|
|
|
|
__sighandler_t handler;
|
|
|
|
unsigned int mask;
|
|
|
|
unsigned int sv_flags;
|
|
|
|
unsigned int sa_flags;
|
|
|
|
|
|
|
|
handler = vec->sv_handler;
|
|
|
|
mask = vec->sv_mask;
|
|
|
|
sv_flags = vec->sv_flags;
|
|
|
|
sa_flags = 0;
|
|
|
|
if (sv_flags & SV_ONSTACK)
|
|
|
|
{
|
|
|
|
# ifdef SA_ONSTACK
|
|
|
|
sa_flags |= SA_ONSTACK;
|
|
|
|
# else
|
|
|
|
__set_errno (ENOSYS);
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
|
|
|
# ifdef SA_RESTART
|
|
|
|
if (!(sv_flags & SV_INTERRUPT))
|
|
|
|
sa_flags |= SA_RESTART;
|
|
|
|
# endif
|
|
|
|
# ifdef SA_RESETHAND
|
|
|
|
if (sv_flags & SV_RESETHAND)
|
|
|
|
sa_flags |= SA_RESETHAND;
|
|
|
|
# endif
|
|
|
|
n = &new;
|
|
|
|
new.sa_handler = handler;
|
|
|
|
if (sigset_set_old_mask (&new.sa_mask, mask) < 0)
|
|
|
|
return -1;
|
|
|
|
new.sa_flags = sa_flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (__sigaction (sig, n, &old) < 0)
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
# ifndef SA_RESETHAND
|
|
|
|
else
|
|
|
|
{
|
|
|
|
__sighandler_t handler;
|
|
|
|
unsigned int mask;
|
|
|
|
struct sigvec_wrapper_data *data;
|
|
|
|
struct sigaction wrapper;
|
|
|
|
|
|
|
|
handler = vec->sv_handler;
|
|
|
|
mask = (unsigned int)vec->sv_mask;
|
|
|
|
data = &sigvec_wrapper_data[sig];
|
|
|
|
wrapper.sa_handler = sigvec_wrapper_handler;
|
|
|
|
/* FIXME: should we set wrapper.sa_mask, wrapper.sa_flags?? */
|
|
|
|
data->sw_handler = handler;
|
|
|
|
data->sw_mask = mask;
|
|
|
|
|
|
|
|
if (__sigaction (sig, &wrapper, &old) < 0)
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
# endif
|
|
|
|
|
|
|
|
if (ovec != NULL)
|
|
|
|
{
|
|
|
|
__sighandler_t handler;
|
|
|
|
unsigned int sv_flags;
|
|
|
|
unsigned int sa_flags;
|
|
|
|
unsigned int mask;
|
|
|
|
|
|
|
|
handler = old.sa_handler;
|
|
|
|
sv_flags = 0;
|
|
|
|
sa_flags = old.sa_flags;
|
|
|
|
# ifndef SA_RESETHAND
|
|
|
|
if (handler == sigvec_wrapper_handler)
|
|
|
|
{
|
|
|
|
handler = sigvec_wrapper_data[sig].sw_handler;
|
|
|
|
/* should we use data->sw_mask?? */
|
|
|
|
sv_flags |= SV_RESETHAND;
|
|
|
|
}
|
|
|
|
# else
|
|
|
|
if (sa_flags & SA_RESETHAND)
|
|
|
|
sv_flags |= SV_RESETHAND;
|
|
|
|
# endif
|
|
|
|
mask = sigset_get_old_mask (&old.sa_mask);
|
|
|
|
# ifdef SA_ONSTACK
|
|
|
|
if (sa_flags & SA_ONSTACK)
|
|
|
|
sv_flags |= SV_ONSTACK;
|
|
|
|
# endif
|
|
|
|
# ifdef SA_RESTART
|
|
|
|
if (!(sa_flags & SA_RESTART))
|
|
|
|
# endif
|
|
|
|
sv_flags |= SV_INTERRUPT;
|
|
|
|
ovec->sv_handler = handler;
|
|
|
|
ovec->sv_mask = (int)mask;
|
|
|
|
ovec->sv_flags = (int)sv_flags;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
compat_symbol (libc, __sigvec, sigvec, GLIBC_2_0);
|
|
|
|
|
|
|
|
# ifndef SA_RESETHAND
|
|
|
|
static void
|
2015-10-17 04:21:49 +08:00
|
|
|
sigvec_wrapper_handler (int sig)
|
1995-02-18 09:27:10 +08:00
|
|
|
{
|
2014-11-15 02:52:16 +08:00
|
|
|
struct sigvec_wrapper_data *data;
|
|
|
|
struct sigaction act;
|
|
|
|
int save;
|
|
|
|
__sighandler_t handler;
|
|
|
|
|
|
|
|
data = &sigvec_wrapper_data[sig];
|
|
|
|
act.sa_handler = SIG_DFL;
|
|
|
|
act.sa_flags = 0;
|
|
|
|
sigset_set_old_mask (&act.sa_mask, data->sw_mask);
|
|
|
|
handler = data->sw_handler;
|
|
|
|
save = errno;
|
|
|
|
(void) __sigaction (sig, &act, (struct sigaction *) NULL);
|
|
|
|
__set_errno (save);
|
|
|
|
|
|
|
|
(*handler) (sig);
|
1995-02-18 09:27:10 +08:00
|
|
|
}
|
2014-11-15 02:52:16 +08:00
|
|
|
# endif /* No SA_RESETHAND. */
|
1995-02-18 09:27:10 +08:00
|
|
|
|
2014-11-15 02:52:16 +08:00
|
|
|
#endif /* SHLIB_COMPAT */
|