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authorGravatar Eric Andersen <andersen@codepoet.org>2001-11-21 14:53:18 +0000
committerGravatar Eric Andersen <andersen@codepoet.org>2001-11-21 14:53:18 +0000
commite625699c3b1a636fa86ed19f96a70e11a23cd020 (patch)
treedb9f751fbfb72e5c7d85d78eea62fde2e54e0000
parent34f7c5e5bec4a306b5fe4618823cec7875ef6c5b (diff)
downloaduClibc-e625699c3b1a636fa86ed19f96a70e11a23cd020.tar.gz
uClibc-e625699c3b1a636fa86ed19f96a70e11a23cd020.tar.bz2
Fix support for sysv style signals
-rw-r--r--libc/signal/Makefile2
-rw-r--r--libc/signal/sysv_signal.c58
2 files changed, 59 insertions, 1 deletions
diff --git a/libc/signal/Makefile b/libc/signal/Makefile
index 3f8283857..4200e5e7b 100644
--- a/libc/signal/Makefile
+++ b/libc/signal/Makefile
@@ -26,7 +26,7 @@ include $(TOPDIR)Rules.mak
CSRC=bsd_sig.c raise.c sigblock.c siggetmask.c sigjmp.c signal.c sigintr.c\
sigpause.c sigstmsk.c killpg.c allocrtsig.c sigsetops.c \
sigaddset.c sigandset.c sigdelset.c sigfillset.c sigorset.c \
- sigempty.c sighold.c sigisempty.c sigismem.c sigrelse.c
+ sigempty.c sighold.c sigisempty.c sigismem.c sigrelse.c sysv_signal.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
OBJS=$(COBJS)
diff --git a/libc/signal/sysv_signal.c b/libc/signal/sysv_signal.c
new file mode 100644
index 000000000..5756ec484
--- /dev/null
+++ b/libc/signal/sysv_signal.c
@@ -0,0 +1,58 @@
+/* Copyright (C) 1991, 1992, 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 <signal.h>
+
+#undef signal
+
+/* Tolerate non-threads versions of Posix */
+#ifndef SA_ONESHOT
+#define SA_ONESHOT 0
+#endif
+#ifndef SA_NOMASK
+#define SA_NOMASK 0
+#endif
+#ifndef SA_INTERRUPT
+#define SA_INTERRUPT 0
+#endif
+
+/* Set the handler for the signal SIG to HANDLER,
+ returning the old handler, or SIG_ERR on error. */
+__sighandler_t __sysv_signal (int sig, __sighandler_t handler)
+{
+ struct sigaction act, oact;
+
+ /* Check signal extents to protect __sigismember. */
+ if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
+ {
+ __set_errno (EINVAL);
+ return SIG_ERR;
+ }
+
+ act.sa_handler = handler;
+ if (__sigemptyset (&act.sa_mask) < 0)
+ return SIG_ERR;
+ act.sa_flags = SA_ONESHOT | SA_NOMASK | SA_INTERRUPT;
+ act.sa_flags &= ~SA_RESTART;
+ if (sigaction (sig, &act, &oact) < 0)
+ return SIG_ERR;
+
+ return oact.sa_handler;
+}
+