host.Users() cannot get information on arm64

[xhsky]

Describe the bug
Host.user() cannot get information on arm64

To Reproduce

import "github.com/shirou/gopsutil/v3/host"
host.Users()   // get: []

Environment (please complete the following information):
cpu_arch: aarch64
os: Centos7/Ubuntu 20

Additional context
Get information error here: unexpected EOF
host_linux.go
err := binary.Read(br, binary.LittleEndian, &u)

[Lomanic]

host.Users() is defined here and retrieves its information from /var/run/utmp, could you upload this file here?

[xhsky]

Can load and read the content.

Get information error here: unexpected EOF
host_linux.go
err := binary.Read(br, binary.LittleEndian, &u)
br: &{[66 10 0 0 0 0 0 0 253 197 36 97 0 0 0 0 103 32 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 7 0 0 0 40 58 0 0 112 116 115 47 48 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 116 115 47 48 114 111 111 116 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 49 57 50 46 49 54 56 46 48 46 49 50 51 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0] 384 -1}
u err: unexpected EOF

[aperum]

It seems that Debian aarch64 writes 400 bytes utmp entries (raspberrypi/Raspberry-Pi-OS-64bit#140). sizeOfUtmp is hardcoded in host_linux_arm64.go to 384. Using C.sizeof_struct_utmp as sizeOfUtmp fixes reading the entries.

[radu-boboc]

I get the same error, Is there a fix for this?

[JosefRypacek]

I have the same issue on aarch64. @shirou, I can assist and provide any data from impacted system if you are interested.

[shirou]

@JosefRypacek
Thank you for reminding us of this issue. Could you check #1603 works or not on your environment?

[JosefRypacek]

Replied to the PR thread.