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authorJens Axboe <axboe@suse.de>2006-04-11 15:51:17 +0200
committerJens Axboe <axboe@suse.de>2006-04-11 15:51:17 +0200
commit70524490ee2ea1bbf6cee6c106597b3ac25a3fc2 (patch)
treec61dd500035bc3e0dea364777de1b7a58b41a75c /arch
parentcbb7e577e732f576b9f399bc2600bdc0626c68dc (diff)
[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>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/syscall_table.S1
-rw-r--r--arch/ia64/kernel/entry.S1
-rw-r--r--arch/powerpc/kernel/systbl.S1
3 files changed, 3 insertions, 0 deletions
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index 4f58b9c0efe..f48bef15b4f 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -314,3 +314,4 @@ ENTRY(sys_call_table)
.long sys_get_robust_list
.long sys_splice
.long sys_sync_file_range
+ .long sys_tee /* 315 */
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index 6e16f6b35bd..e3079881121 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1609,5 +1609,6 @@ sys_call_table:
data8 sys_set_robust_list
data8 sys_get_robust_list
data8 sys_sync_file_range // 1300
+ data8 sys_tee
.org sys_call_table + 8*NR_syscalls // guard against failures to increase NR_syscalls
diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S
index 1424eab450e..a14c9640384 100644
--- a/arch/powerpc/kernel/systbl.S
+++ b/arch/powerpc/kernel/systbl.S
@@ -323,3 +323,4 @@ COMPAT_SYS(pselect6)
COMPAT_SYS(ppoll)
SYSCALL(unshare)
SYSCALL(splice)
+SYSCALL(tee)