fanotify: add system call support

Add support for fanotify_init() and fanotify_mark() syscalls. The header
file is taken from glibc.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>

3 files changed, 71 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 82525984a..b75b712ac 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -27,6 +27,7 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += \
 	eventfd.c \
 	eventfd_read.c \
 	eventfd_write.c \
+	fanotify.c \
 	getrandom.c \
 	inotify.c \
 	ioperm.c \
diff --git a/libc/sysdeps/linux/common/fanotify.c b/libc/sysdeps/linux/common/fanotify.c
new file mode 100644
index 000000000..431e0e591
--- /dev/null
+++ b/libc/sysdeps/linux/common/fanotify.c
@@ -0,0 +1,32 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * fanotify interface for uClibc
+ *
+ * Copyright (C) 2015 by Bartosz Golaszewski <bartekgola@gmail.com>
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/fanotify.h>
+
+#ifdef __NR_fanotify_init
+_syscall2(int, fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
+#endif
+
+#ifdef __NR_fanotify_mark
+# include <bits/wordsize.h>
+# include <fcntl.h>
+
+# if __WORDSIZE == 64
+_syscall5(int, fanotify_mark, int, fanotify_fd, unsigned int, flags,
+	  uint64_t, mask, int, dirfd, const char *, pathname)
+# else
+int fanotify_mark(int fanotify_fd, unsigned int flags,
+		  uint64_t mask, int dirfd, const char *pathname)
+{
+	return INLINE_SYSCALL(fanotify_mark, 6, fanotify_fd, flags,
+			      OFF64_HI_LO(mask), dirfd, pathname);
+}
+# endif
+#endif
diff --git a/libc/sysdeps/linux/common/sys/fanotify.h b/libc/sysdeps/linux/common/sys/fanotify.h
new file mode 100644
index 000000000..5eec3e55c
--- /dev/null
+++ b/libc/sysdeps/linux/common/sys/fanotify.h
@@ -0,0 +1,38 @@
+/* Copyright (C) 2010-2015 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef	_SYS_FANOTIFY_H
+#define	_SYS_FANOTIFY_H	1
+
+#include <stdint.h>
+#include <linux/fanotify.h>
+
+
+__BEGIN_DECLS
+
+/* Create and initialize fanotify group.  */
+extern int fanotify_init (unsigned int __flags, unsigned int __event_f_flags)
+  __THROW;
+
+/* Add, remove, or modify an fanotify mark on a filesystem object.  */
+extern int fanotify_mark (int __fanotify_fd, unsigned int __flags,
+			  uint64_t __mask, int __dfd, const char *__pathname)
+     __THROW;
+
+__END_DECLS
+
+#endif /* sys/fanotify.h */