- add signalfd()

Makefile.in

@@ -314,6 +314,7 @@ ifneq ($(UCLIBC_LINUX_SPECIFIC),y)
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/inotify.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/perm.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/personality.h
+	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/sys/signalfd.h
 endif
 ifneq ($(UCLIBC_SV4_DEPRECATED),y)
 	# Remove ustat.h since deprecated SV4 support was disabled upon request

include/sys/signalfd.h

@@ -0,0 +1,86 @@
+/* Copyright (C) 2007, 2008 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.  */
+
+#ifndef _SYS_SIGNALFD_H
+#define _SYS_SIGNALFD_H 1
+
+#define __need_sigset_t
+#include <signal.h>
+#include <stdint.h>
+
+
+struct signalfd_siginfo
+{
+  uint32_t ssi_signo;
+  int32_t ssi_errno;
+  int32_t ssi_code;
+  uint32_t ssi_pid;
+  uint32_t ssi_uid;
+  int32_t ssi_fd;
+  uint32_t ssi_tid;
+  uint32_t ssi_band;
+  uint32_t ssi_overrun;
+  uint32_t ssi_trapno;
+  int32_t ssi_status;
+  int32_t ssi_int;
+  uint64_t ssi_ptr;
+  uint64_t ssi_utime;
+  uint64_t ssi_stime;
+  uint64_t ssi_addr;
+  uint8_t __pad[48];
+};
+
+/* Flags for signalfd.  */
+#if defined __sparc__ || defined __sparc64__
+enum
+  {
+    SFD_CLOEXEC = 0x400000,
+# define SFD_CLOEXEC SFD_CLOEXEC
+    SFD_NONBLOCK = 0x4000
+# define SFD_NONBLOCK SFD_NONBLOCK
+  };
+
+#elif defined __alpha__
+enum
+  {
+    SFD_CLOEXEC = 010000000,
+# define SFD_CLOEXEC SFD_CLOEXEC
+    SFD_NONBLOCK = 04
+# define SFD_NONBLOCK SFD_NONBLOCK
+  };
+
+#else
+enum
+  {
+    SFD_CLOEXEC = 02000000,
+# define SFD_CLOEXEC SFD_CLOEXEC
+    SFD_NONBLOCK = 04000
+# define SFD_NONBLOCK SFD_NONBLOCK
+  };
+#endif
+
+__BEGIN_DECLS
+
+/* Request notification for delivery of signals in MASK to be
+   performed using descriptor FD.*/
+extern int signalfd (int __fd, const sigset_t *__mask, int __flags)
+  __nonnull ((2)) __THROW;
+
+__END_DECLS
+
+#endif /* sys/signalfd.h */

libc/sysdeps/linux/common/Makefile.in

@@ -34,8 +34,8 @@ CSRC := $(filter-out inotify.c ioperm.c iopl.c madvise.c \
 	modify_ldt.c personality.c prctl.c readahead.c reboot.c \
 	remap_file_pages.c sched_getaffinity.c sched_setaffinity.c \
 	sendfile64.c sendfile.c setfsgid.c setfsuid.c setresuid.c \
-	splice.c vmsplice.c tee.c swapoff.c swapon.c sync_file_range.c \
-	sysctl.c sysinfo.c uselib.c vhangup.c,$(CSRC))
+	splice.c vmsplice.c tee.c signalfd.c swapoff.c swapon.c \
+	sync_file_range.c sysctl.c sysinfo.c uselib.c vhangup.c,$(CSRC))
 endif
 
 ifneq ($(UCLIBC_BSD_SPECIFIC),y)

libc/sysdeps/linux/common/signalfd.c

@@ -0,0 +1,38 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * signalfd() for uClibc
+ *
+ * Copyright (C) 2008 Bernhard Reutner-Fischer <uclibc@uclibc.org>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <signal.h>
+#include <sys/signalfd.h>
+
+#if defined __NR_signalfd4
+#define __NR___syscall_signalfd4 __NR_signalfd4
+static __inline__ _syscall4(int, __syscall_signalfd4, int, fd,
+		const sigset_t *, mask, size_t, sizemask, int, flags);
+#elif defined __NR_signalfd
+#define __NR___syscall_signalfd __NR_signalfd4
+static __inline__ _syscall3(int, __syscall_signalfd, int, fd,
+		const sigset_t *, mask, size_t, sizemask);
+#endif
+
+int signalfd (int fd, const sigset_t *mask, int flags)
+{
+#if defined __NR___syscall_signalfd4
+	return __syscall_signalfd4(fd, mask, _NSIG / 8, flags);
+#elif defined __NR___syscall_signalfd
+	if (flags != 0) {
+		__set_errno(EINVAL);
+		return 1;
+	}
+	return __syscall_signalfd(fd, mask, _NSIG / 8);
+#elif defined __UCLIBC_HAS_STUBS__
+	__set_errno(ENOSYS);
+	return -1;
+#endif
+}