do_tee

Name:This is a tee(1) implementation that works on pipes. It doesn't copy* any data, it simply references the 'in' pages on the 'out' pipe.* The 'flags' used are the SPLICE_F_* variants, currently the only* applicable one is SPLICE_F_NONBLOCK.

Proto:static long do_tee(struct file *in, struct file *out, size_t len, unsigned int flags)

Type:long

Parameter:

Type	Parameter	Name
struct file *	in
struct file *	out
size_t	len
unsigned int	flags

1769

ipipe = After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same* location, so checking ->i_pipe is not enough to verify that this is a* pipe.

1770

opipe = After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same* location, so checking ->i_pipe is not enough to verify that this is a* pipe.

1771

ret = -EINVAL

1777

If ipipe && opipe && ipipe != opipe Then

1778

If (f_flags | f_flags) & O_NONBLOCK Then flags |= don't block on the pipe splicing (but

1785

ret = Make sure there's data to read. Wait for input if we can, otherwise* return an appropriate error.

1786

If Not ret Then

1787

ret = Make sure there's writeable room. Wait for room if we can, otherwise* return an appropriate error.

1788

If Not ret Then ret = Link contents of ipipe to opipe.

1793

Return ret

**Caller**
Name	Describe
SYSCALL_DEFINE4

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion

Function report