[PATCH] splice: add support for sys_tee()
Basically an in-kernel implementation of tee, which uses splice and the
pipe buffers as an intelligent way to pass data around by reference.
Where the user space tee consumes the input and produces a stdout and
file output, this syscall merely duplicates the data inside a pipe to
another pipe. No data is copied, the output just grabs a reference to the
input pipe data.
Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h
index 6a8dd83..d81d6cf 100644
--- a/include/asm-i386/unistd.h
+++ b/include/asm-i386/unistd.h
@@ -320,8 +320,9 @@
#define __NR_get_robust_list 312
#define __NR_splice 313
#define __NR_sync_file_range 314
+#define __NR_tee 315
-#define NR_syscalls 315
+#define NR_syscalls 316
/*
* user-visible error numbers are in the range -1 - -128: see