diff options
Diffstat (limited to 'signal/sigvec.c')
| -rw-r--r-- | signal/sigvec.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/signal/sigvec.c b/signal/sigvec.c deleted file mode 100644 index 5313002089..0000000000 --- a/signal/sigvec.c +++ /dev/null @@ -1,202 +0,0 @@ -/* ABI compatibility for obsolete sigvec function from 4.2BSD. - 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 <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 - - -/* 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 -__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 -sigvec_wrapper_handler (int sig) -{ - 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); -} -# endif /* No SA_RESETHAND. */ - -#endif /* SHLIB_COMPAT */ |