install.sh port check false positive causes installation to abort

[andre8244]

Steps to reproduce

• Install NS8 on a system where a Unix domain socket happens to have inode number 80 or 443
• Run install.sh
• Observe that installation aborts immediately with Installation failed: port 443 is already in use.

Expected behavior

The installer should only abort if an actual TCP or UDP listener is bound to port 80 or 443.

Actual behavior

The ss filter ( sport = :443 ) matches across all socket families, including Unix domain sockets (u_seq). If a listening Unix socket (e.g. /run/udev/control) has a kernel-assigned inode that equals 80 or 443, this causes a false positive:

# ss -H -l -p "( sport = :443 )"
u_seq  LISTEN   0        4096       /run/udev/control 443       * 0   users:(("systemd-udevd",pid=52550,fd=3),("systemd",pid=1,fd=128))

Components

NS8 core — core/install.sh

[andre8244]

QA

• Testing version: 3.18.2-dev.2
• Check that installation aborts if a process is listening on port 80 or 443
• Check that installation continues if a process is listening on a Unix socket with inode 80 or 443

[andre8244]

Verified

• Tested with a web server listening on port 443 ➡️ Installation aborts
• Tested with a Unix socket with inode 443 ➡️ Installation continues