Fanotify syscalls are not supported in uClibc. Add a new include
file - missing_syscalls.h - implementing the syscalls directly in
busybox.
Signed-off-by: Bartosz Golaszewski <bartekg...@gmail.com>
---
include/missing_syscalls.h | 47 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 include/missing_syscalls.h
diff --git a/include/missing_syscalls.h b/include/missing_syscalls.h
new file mode 100644
index 0000000..080bb28
--- /dev/null
+++ b/include/missing_syscalls.h
@@ -0,0 +1,47 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Declarations for syscalls missing on some platforms.
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#ifndef __BB_MISSING_SYSCALLS_H
+#define __BB_MISSING_SYSCALLS_H
+
+#include "libbb.h"
+
+#include <sys/syscall.h>
+
+#if defined(__UCLIBC__) && defined(__linux__)
+
+/* fanotify() is missing on uClibc */
+
+#include <limits.h> /* for __WORDSIZE */
+
+#if __WORDSIZE == 64
+#define __SYSCALL_LONG_LONG_ARG(arg) (arg)
+#else
+/*
+ * On 32-bit systems we need to pass uint64_t arguments as two
+ * uint32_t's, that are going to be sewn together in the kernel.
+ */
+#define __SYSCALL_LONG_LONG_ARG(arg) \
+ ((union { uint64_t ll; uint32_t l[2]; }){ .ll = arg }).l[0], \
+ ((union { uint64_t ll; uint32_t l[2]; }){ .ll = arg }).l[1]
+#endif
+
+static ALWAYS_INLINE int fanotify_init(unsigned flags, unsigned event_f_flags)
+{
+ return syscall(SYS_fanotify_init, flags, event_f_flags);
+}
+
+static ALWAYS_INLINE int fanotify_mark(int fanotify_fd, unsigned flags,
+ uint64_t mask, int dfd, const char *pathname)
+{
+ return syscall(SYS_fanotify_mark, fanotify_fd, flags,
+ __SYSCALL_LONG_LONG_ARG(mask), dfd, pathname);
+}
+
+#endif /* __UCLIBC__ && __linux__ */
+
+#endif /* __BB_MISSING_SYSCALLS_H */
--
2.1.4
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