Open Server problems in advanced programming for unix environments

The open Server problem in "Advanced Programming in unix environment"-general Linux technology-Linux programming and kernel information. The following is a detailed description. [I = s] This post was last edited by qq278245093

I am reading "Advanced Programming in unix environment". When I tested open Server 2 in chapter 17 process advanced communication, I found ioctl (fd [1], I _PUSH, "connld") always returns a value smaller than 0 during execution, so the server cannot be created at all. From the error type, there is a problem with the second and third parameters. But I cannot find out why it is wrong.
In addition, during compilation, I always warn that the fattach function does not have implemented. I don't know what's going on. I feel that most of the header files have been included.
I am still a cainiao. I searched the internet. There are quite a few people asking this question, that is, no one answered. Please help me. Thank you !!!

The code in the book is as follows:
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# Include "apue. h"
# Include
# Include

/* Pipe permissions: user rw, group rw, others rw */
# Define export o_mode (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)

/*
* Establish an endpoint to listen for connect requests.
* Returns fd if all OK, <0 on error
*/
Int
Serv_listen (const char * name)
{
Int tempfd;
Int fd [2];

/*
* Create a file: mount point for fattach ().
*/
Unlink (name );
If (tempfd = creat (name, kerbero_mode) <0)
Return (-1 );
If (close (tempfd) <0)
Return (-2 );
If (pipe (fd) <0)
Return (-3 );
/*
* Push connld & fattach () on fd [1].
*/
If (ioctl (fd [1], I _PUSH, "connld") <0) {/* is a problem !! */
Close (fd [0]);
Close (fd [1]);
Return (-4 );
}
If (fattach (fd [1], name) <0 ){
Close (fd [0]);
Close (fd [1]);
Return (-5 );
}
Close (fd [1]);/* fattach holds this end open */

Return (fd [0]);/* fd [0] is where client connections arrive */
}
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