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[PATCH] splice: add support for sys_tee()

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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>
This commit is contained in:
Jens Axboe
2006-04-11 15:51:17 +02:00
parent cbb7e577e7
commit 70524490ee
11 changed files with 208 additions and 4 deletions
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include/linux/pipe_fs_i.h
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@@ -21,6 +21,7 @@ struct pipe_buf_operations {
void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *);
void (*release)(struct pipe_inode_info *, struct pipe_buffer *);
int (*steal)(struct pipe_inode_info *, struct pipe_buffer *);
void (*get)(struct pipe_inode_info *, struct pipe_buffer *);
};
struct pipe_inode_info {