diff options
Diffstat (limited to 'sysdeps/posix/sigsetmask.c')
-rw-r--r-- | sysdeps/posix/sigsetmask.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/posix/sigsetmask.c b/sysdeps/posix/sigsetmask.c new file mode 100644 index 0000000..12e77a6 --- /dev/null +++ b/sysdeps/posix/sigsetmask.c @@ -0,0 +1,55 @@ +/* Copyright (C) 1991, 1994, 1995 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 Library General Public License as +published by the Free Software Foundation; either version 2 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ansidecl.h> +#include <errno.h> +#include <signal.h> + +/* Set the mask of blocked signals to MASK, returning the old mask. */ +int +DEFUN(__sigsetmask, (mask), int mask) +{ + register int sig; + sigset_t set, oset; + + if (__sigemptyset(&set) < 0) + return -1; + + if (sizeof (mask) == sizeof (set)) + *(int *) &set = mask; + else + for (sig = 1; sig < NSIG; ++sig) + if ((mask & sigmask(sig)) && + __sigaddset(&set, sig) < 0) + return -1; + + if (sigprocmask(SIG_SETMASK, &set, &oset) < 0) + return -1; + + mask = 0; + if (sizeof (mask) == sizeof (oset)) + mask = *(int *) &oset; + else + for (sig = 1; sig < NSIG; ++sig) + if (__sigismember(&oset, sig)) + mask |= sigmask(sig); + + return mask; +} + +weak_alias (__sigsetmask, sigsetmask) |