10 files changed, 34 insertions, 1 deletions
diff --git a/sysdeps/unix/sysv/linux/Versions b/sysdeps/unix/sysv/linux/Versions
index b2e7ee7801..ad7a8701fd 100644
--- a/sysdeps/unix/sysv/linux/Versions
+++ b/sysdeps/unix/sysv/linux/Versions
@@ -124,7 +124,7 @@ libc {
     _sys_errlist; sys_errlist; _sys_nerr; sys_nerr;
   }
   GLIBC_2.5 {
-    splice; sync_file_range;
+    splice; sync_file_range; tee;
   }
   GLIBC_PRIVATE {
     # functions used in other libraries
diff --git a/sysdeps/unix/sysv/linux/alpha/bits/fcntl.h b/sysdeps/unix/sysv/linux/alpha/bits/fcntl.h
index f06201c25f..6898fe8743 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/fcntl.h
@@ -204,6 +204,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/i386/bits/fcntl.h b/sysdeps/unix/sysv/linux/i386/bits/fcntl.h
index 6311f1fbad..a375888106 100644
--- a/sysdeps/unix/sysv/linux/i386/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/i386/bits/fcntl.h
@@ -211,6 +211,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/ia64/bits/fcntl.h b/sysdeps/unix/sysv/linux/ia64/bits/fcntl.h
index 630cb10ffb..63a771ddb9 100644
--- a/sysdeps/unix/sysv/linux/ia64/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/ia64/bits/fcntl.h
@@ -205,6 +205,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h b/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
index 7f53b1dad5..2219271a1b 100644
--- a/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
@@ -211,6 +211,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/s390/bits/fcntl.h b/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
index e951b631cd..ad3ef420a1 100644
--- a/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/s390/bits/fcntl.h
@@ -230,6 +230,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/sh/bits/fcntl.h b/sysdeps/unix/sysv/linux/sh/bits/fcntl.h
index 6311f1fbad..a375888106 100644
--- a/sysdeps/unix/sysv/linux/sh/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/sh/bits/fcntl.h
@@ -211,6 +211,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/sparc/bits/fcntl.h b/sysdeps/unix/sysv/linux/sparc/bits/fcntl.h
index 4a158e2619..b3788f0daf 100644
--- a/sysdeps/unix/sysv/linux/sparc/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/sparc/bits/fcntl.h
@@ -230,6 +230,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index ab4ba754a7..6bfccd26aa 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -74,6 +74,7 @@ splice		EXTRA	splice		i:iiii	splice
 sysinfo		EXTRA	sysinfo		i:p	sysinfo
 swapon		-	swapon		i:si	__swapon	swapon
 swapoff		-	swapoff		i:s	__swapoff	swapoff
+tee		EXTRA	tee		i:iiii	tee
 unshare		EXTRA	unshare		i:i	unshare
 uselib		EXTRA	uselib		i:s	uselib
 wait4		-	wait4		i:iWiP	__wait4		wait4
diff --git a/sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h b/sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h
index f7e5d16e8b..2351737f7c 100644
--- a/sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/x86_64/bits/fcntl.h
@@ -225,6 +225,10 @@ extern int sync_file_range (int __fd, __off64_t __from, __off64_t __to,
 extern int splice (int __fdin, int __fdout, size_t __len, unsigned int __flags)
     __THROW;
 
+/* In-kernel implementation of tee for pipe buffers.  */
+extern int tee (int __fdin, int __fdout, size_t __len, unsigned int __flags)
+    __THROW;
+
 #endif
 
 __END_DECLS