diff options
Diffstat (limited to 'REORG.TODO/signal/sighold.c')
-rw-r--r-- | REORG.TODO/signal/sighold.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/REORG.TODO/signal/sighold.c b/REORG.TODO/signal/sighold.c new file mode 100644 index 0000000000..2e32e4718a --- /dev/null +++ b/REORG.TODO/signal/sighold.c @@ -0,0 +1,39 @@ +/* Add SIG to the calling process' signal mask. + Copyright (C) 1998-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. + + 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/>. */ + +#define __need_NULL +#include <stddef.h> +#include <signal.h> + +int +sighold (int sig) +{ + sigset_t set; + + /* Retrieve current signal set. */ + if (__sigprocmask (SIG_SETMASK, NULL, &set) < 0) + return -1; + + /* Add the specified signal. */ + if (sigaddset (&set, sig) < 0) + return -1; + + /* Set the new mask. */ + return __sigprocmask (SIG_SETMASK, &set, NULL); +} |