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-rw-r--r--signal/sighold.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/signal/sighold.c b/signal/sighold.c
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+/* Add SIG to the calling process' signal mask.
+ Copyright (C) 1998 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 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include <signal.h>
+
+int
+sighold (sig)
+ 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);
+}