=== DF-0867 trigger build log (unprivileged-free; built as root because the
    ioctl itself needs root — the build is just cc) ===
Command: cd /root/poc/DF-0867 && cc -O2 -Wall -o trigger trigger.c

BUILD_OK: -rwxr-xr-x  1 root  wheel  8872 Jul 11 18:37 trigger

(clean compile, no warnings)