Beyond Compare Fails to Launch on RHEL8 With Operation Not Permitted

[Chris]

Beyond Compare 4.4.6 is compatible with Redhat Enterprise Linux 8 in the default OS configuration.

The optional security framework fapolicyd controls application execution. When it is enabled, Beyond Compare will fail to launch.

Error as shown in terminal:

​[scooter@alma8]$ bcompare
/usr/bin/ldd: line 160: /lib64/ld-linux-x86-64.so.2: Operation not permitted
ldd: exited with unknown exit code (126)​

The /usr/bin/bcompare launcher script uses ldd to check for missing shared libraries. The default configuration of fapolicyd prevents ldd from running.

Two ways to prevent the error:

1) Enable ldd in fapolicyd settings.

[root@alma8]# gedit /etc/fapolicyd/rules.d/30-patterns.rules

Comment out the ld_so line.

#deny_audit perm=any pattern=ld_so : all

Update the rules list and restart fapolicyd.

[root@alma8]# fagenrules --load
[root@alma8]# systemctl restart fapolicyd

2) Edit /usr/bin/bcompare to comment out the ldd section of the launcher script except for the 'export' line. After the edit, launching Beyond Compare will fail silently if there are missing libraries.

[root@alma8]# gedit /usr/bin/bcompare

#check to see if we have all of the shared libraries.
#if ldd "$EXEC" | grep -q "not found" ; then
# #if not then add our qt4 libraries in and see if that fixes problem
export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$BC_LIB/qt4"
# if ldd "$EXEC" | grep -q "not found" ; then
# echo Some Shared Libraries were not found
# ldd "$EXEC"
# exit 1
# fi
#fi

Redhat Documentation for fapolicyd:
https://access.redhat.com/documentat...y-hardening