| /* Copyright (C) 1991, 1992, 1995, 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 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <stddef.h> |
| #include <signal.h> |
| |
| |
| /* If SET is not NULL, modify the current set of blocked signals |
| according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK. |
| If OSET is not NULL, store the old set of blocked signals in *OSET. */ |
| int |
| __sigprocmask (how, set, oset) |
| int how; |
| const sigset_t *set; |
| sigset_t *oset; |
| { |
| int mask; |
| |
| if (set != NULL) |
| { |
| mask = *set; |
| switch (how) |
| { |
| case SIG_BLOCK: |
| mask = __sigblock (mask); |
| break; |
| |
| case SIG_UNBLOCK: |
| mask = __sigblock (0) & ~mask; |
| /* Fall through. */ |
| |
| case SIG_SETMASK: |
| mask = __sigsetmask (mask); |
| break; |
| |
| default: |
| __set_errno (EINVAL); |
| return -1; |
| } |
| } |
| else |
| mask = __sigblock (0); |
| |
| if (oset != NULL) |
| *oset = mask; |
| |
| return 0; |
| } |
| |
| weak_alias (__sigprocmask, sigprocmask) |