Adjust SELinux context for fbguard

[Khalyutin]

Porblem:

RHEL 10 now prevent start services from not-standard folders.

: firebird.service: Unable to locate executable '/opt/firebird/bin/fbguard': Permission denied
: firebird.service: Failed at step EXEC spawning /opt/firebird/bin/fbguard: Permission denied

/opt/.../fbgurad not work as service in RHEL10 but work in Debian 13
/usr/bin/.../fbgurad work service as expected

https://groups.google.com/g/firebird-devel/c/-7DmsSesg3E

in@vm-host-s-redhat-work:~/Firebird-5.0.4.1812-0-linux-x64$ sudo ./install.sh

Firebird 5.0.4.1812-0.x64 Installation
Press Enter to start installation or ^C to abort
Extracting install data
Please enter new password for SYSDBA user: masterkey
Fatal error running 'systemctl --quiet start firebird.service' - exiting
in@vm-host-s-redhat-work:~/Firebird-5.0.4.1812-0-linux-x64$ sudo systemctl status firebird
× firebird.service - Firebird Database Server

     Loaded: loaded (/usr/lib/systemd/system/firebird.service; enabled; preset: disabled)
     Active: failed (Result: exit-code) since Mon 2026-07-06 14:08:39 EEST; 4s ago
 Invocation: 87dcc4b27eb1417d812e868e9c8a7ced
       Docs: https://firebirdsql.org/en/firebird-rdbms/
    Process: 615891 ExecStart=/opt/firebird/bin/fbguard -daemon -forever (code=exited, status=203/EXEC)
   Mem peak: 1.2M
        CPU: 3ms

Jul 06 14:08:39 vm-host-s-redhat-work systemd[1]: Starting firebird.service - Firebird Database Server...
Jul 06 14:08:39 vm-host-s-redhat-work (fbguard)[615891]: firebird.service: Unable to locate executable '/opt/firebird/bin/fbguard': Permission denied
Jul 06 14:08:39 vm-host-s-redhat-work (fbguard)[615891]: firebird.service: Failed at step EXEC spawning /opt/firebird/bin/fbguard: Permission denied
Jul 06 14:08:39 vm-host-s-redhat-work systemd[1]: firebird.service: Control process exited, code=exited, status=203/EXEC
Jul 06 14:08:39 vm-host-s-redhat-work systemd[1]: firebird.service: Failed with result 'exit-code'.
Jul 06 14:08:39 vm-host-s-redhat-work systemd[1]: Failed to start firebird.service - Firebird Database Server.
in@vm-host-s-redhat-work:~/Firebird-5.0.4.1812-0-linux-x64$ 

Solution:

Add bin_t context to fbguard via chcon in install.sh

Test:
https://github.com/notesoft/SQLfb/tree/work-install.sh
Artifact download URL: https://github.com/notesoft/SQLfb/actions/runs/29092950440/artifacts/8227790862

Installed:
  libtomcrypt-1.18.2-21.el10_1.x86_64                                                                                                                                                                                    

Complete!
in@vm-host-s-redhat-work:~/Firebird-6.0.0.2070-Initial-linux-x64$ sudo ./install.sh

Firebird 6.0.0.2070-Initial.x64 Installation

Press Enter to start installation or ^C to abort
Extracting install data
Please enter new password for SYSDBA user: masterkey
/opt/firebird/bin/gsec: symbol lookup error: /opt/firebird/plugins/libSrp.so: undefined symbol: mp_ubin_size

Install completed
in@vm-host-s-redhat-work:~/Firebird-6.0.0.2070-Initial-linux-x64$ sudo systemctl status firebird
● firebird.service - Firebird Database Server
     Loaded: loaded (/usr/lib/systemd/system/firebird.service; enabled; preset: disabled)
     Active: active (running) since Sat 2026-07-11 10:03:32 EEST; 49s ago
 Invocation: 51da2a4a944d45479aee50ac30f42785
       Docs: https://firebirdsql.org/en/firebird-rdbms/
    Process: 1652545 ExecStart=/opt/firebird/bin/fbguard -daemon -forever (code=exited, status=0/SUCCESS)
   Main PID: 1652546 (fbguard)
      Tasks: 5 (limit: 22908)
     Memory: 15.7M (peak: 16M)
        CPU: 47ms
     CGroup: /system.slice/firebird.service
             ├─1652546 /opt/firebird/bin/fbguard -daemon -forever
             └─1652547 /opt/firebird/bin/firebird

Jul 11 10:03:32 vm-host-s-redhat-work systemd[1]: Starting firebird.service - Firebird Database Server...
Jul 11 10:03:32 vm-host-s-redhat-work systemd[1]: Started firebird.service - Firebird Database Server.
in@vm-host-s-redhat-work:~/Firebird-6.0.0.2070-Initial-linux-x64$