[PATCH liburing] io_uring_prep_cmd_getsockname.3: Deduplicate manpage

[Gabriel Krisman Bertazi <krisman@suse.de>]

I committed the op_getsockname man page under the wrong name, because I
originally wrote the code and manpage as a main io_uring command and then
converted to a uring_cmd but forgot to update the manpage.  Following
this, Jens pushed an AI generated version of this page with the correct
name and almost the same content.

While the AI version is okay-ish, it is missing relevant details, like
differences in error codes to the original syscall.  So I'm replacing
the AI with my version, minus a few corrections. There is no point in
lingering the wrong named version around, as there is no function
with that name.

Reported by exbigboss on Discord.

Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 man/io_uring_prep_cmd_getsockname.3 | 75 ++++++++++++++++-----------
 man/io_uring_prep_getsockname.3     | 78 -----------------------------
 2 files changed, 47 insertions(+), 106 deletions(-)
 delete mode 100644 man/io_uring_prep_getsockname.3

diff --git a/man/io_uring_prep_cmd_getsockname.3 b/man/io_uring_prep_cmd_getsockname.3
index 060ff4a7..221b49dc 100644
--- a/man/io_uring_prep_cmd_getsockname.3
+++ b/man/io_uring_prep_cmd_getsockname.3
@@ -1,12 +1,14 @@
+.\" Copyright (C) 2025 SUSE LLC.
 .\" Copyright (C) 2025 Jens Axboe <axboe@kernel.dk>
 .\"
 .\" SPDX-License-Identifier: LGPL-2.0-or-later
 .\"
-.TH io_uring_prep_cmd_getsockname 3 "January 18, 2025" "liburing-2.13" "liburing Manual"
+.TH io_uring_prep_cmd_getsockname 3 "December 3, 2025" "liburing-2.13" "liburing Manual"
 .SH NAME
 io_uring_prep_cmd_getsockname \- prepare a getsockname or getpeername request
 .SH SYNOPSIS
 .nf
+.B #include <sys/socket.h>
 .B #include <liburing.h>
 .PP
 .BI "void io_uring_prep_cmd_getsockname(struct io_uring_sqe *" sqe ","
@@ -16,45 +18,62 @@ io_uring_prep_cmd_getsockname \- prepare a getsockname or getpeername request
 .BI "                                   int " peer ");"
 .fi
 .SH DESCRIPTION
-.PP
 The
 .BR io_uring_prep_cmd_getsockname (3)
-function prepares a socket command request to get the socket address. The
-submission queue entry
+function prepares a getsockname/getpeername request.
+The submission queue entry
 .I sqe
-is setup to use the socket indicated by the file descriptor
-.IR fd .
-
-The
-.I sockaddr
-argument points to a buffer where the address will be stored. The
-.I sockaddr_len
-argument points to the length of the buffer, which will be updated with
-the actual length of the address on completion.
+is setup to fetch the locally bound address or peer address of the socket
+file descriptor pointed by
+.IR sockfd .
+The parameter
+.IR sockaddr
+points to a region of size
+.IR sockaddr_len
+where the output is written.
+.IR sockaddr_len
+is modified by the kernel on return  to indicate how many bytes were written.
+The output address is the locally bound address if
+.IR peer
+is set to
+.B 0
+or the peer address if
+.IR peer
+is set to
+.BR 1 .
 
-If
-.I peer
-is 0, this operates like
-.BR getsockname (2),
-returning the local address bound to the socket. If
-.I peer
-is non-zero, this operates like
-.BR getpeername (2),
-returning the address of the peer connected to the socket.
+This function prepares an async
+.BR getsockname (2)
+or
+.BR getpeername (2)
+request. See those man pages for details.
 
 .SH RETURN VALUE
 None
 .SH ERRORS
 The CQE
 .I res
-field will contain the result of the operation. See
-.BR getsockname (2)
-or
-.BR getpeername (2)
-for possible error values.
+field will contain the result of the operation. See the related man page for
+details on possible values. Note that where synchronous system calls will return
+.B -1
+on failure and set
+.I errno
+to the actual error value, io_uring never uses
+.IR errno .
+Instead it returns the negated
+.I errno
+directly in the CQE
+.I res
+field.
+.BR
+Differently from the equivalent system calls, if the user attempts to
+use this operation on a non-socket file descriptor, the CQE error result
+is
+.IR ENOTSUP
+instead of
+.IR ENOSOCK.
 .SH SEE ALSO
 .BR io_uring_get_sqe (3),
 .BR io_uring_submit (3),
-.BR io_uring_prep_getsockname (3),
 .BR getsockname (2),
 .BR getpeername (2)
diff --git a/man/io_uring_prep_getsockname.3 b/man/io_uring_prep_getsockname.3
deleted file mode 100644
index de78cb40..00000000
--- a/man/io_uring_prep_getsockname.3
+++ /dev/null
@@ -1,78 +0,0 @@
-.\" Copyright (C) 2024 SUSE LLC.
-.\"
-.\" SPDX-License-Identifier: LGPL-2.0-or-later
-.\"
-.TH io_uring_prep_getsockname 3 "Dec 3, 2025" "liburing-2.13" "liburing Manual"
-.SH NAME
-io_uring_prep_getsockname \- prepare a getsockname or getpeername request
-.SH SYNOPSIS
-.nf
-.B #include <sys/socket.h>
-.B #include <liburing.h>
-.PP
-.BI "void io_uring_prep_getsockname(struct io_uring_sqe *" sqe ","
-.BI "                               int " sockfd ","
-.BI "                               struct sockaddr *" sockaddr ","
-.BI "                               socklen_t *" sockaddr_len ","
-.BI "                               int " peer ");"
-.fi
-.SH DESCRIPTION
-The
-.BR io_uring_prep_getsockname (3)
-function prepares a getsockname/getpeername request.
-The submission queue entry
-.I sqe
-is setup to fetch the locally bound address or peer address of the socket
-file descriptor pointed by
-.IR sockfd .
-The parameter
-.IR sockaddr
-points to a region of size
-.IR sockaddr_len
-where the output is written.
-.IR sockaddr_len
-is modified by the kernel to indicate how many bytes were written.
-The output address is the locally bound address if
-.IR peer
-is set to
-.B 0
-or the peer address if
-.IR peer
-is set to
-.BR 1 .
-
-This function prepares an async
-.BR getsockname (2)
-or
-.BR getpeername (2)
-request. See those man pages for details.
-
-.SH RETURN VALUE
-None
-.SH ERRORS
-The CQE
-.I res
-field will contain the result of the operation. See the related man page for
-details on possible values. Note that where synchronous system calls will return
-.B -1
-on failure and set
-.I errno
-to the actual error value, io_uring never uses
-.IR errno .
-Instead it returns the negated
-.I errno
-directly in the CQE
-.I res
-field.
-.BR
-Differently from the equivalent system calls, if the user attempts to
-use this operation on a non-socket file descriptor, the CQE error result
-is
-.IR -ENOTSUP
-instead of
-.IR ENOSOCK.
-.SH SEE ALSO
-.BR io_uring_get_sqe (3),
-.BR io_uring_submit (3),
-.BR io_uring_prep_getsockname (2)
-.BR io_uring_prep_getpeername (2)
-- 
2.52.0