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ci: mock sysctl in test container to avoid read-only filesystem errors #129

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ci: mock sysctl in test container to avoid read-only filesystem errors #129

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26 changes: 26 additions & 0 deletions .github/scripts/test_entrypoint.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,32 @@ set -o nounset # undefined variables causes script to fail
mkdir -p /var/lock/
mkdir -p /var/log/

# Mock sysctl and /etc/init.d/sysctl to avoid read-only filesystem errors in container
if [ -f /etc/init.d/sysctl ]; then
cat << 'EOF' > /etc/init.d/sysctl
#!/bin/sh /etc/rc.common
START=11
start() { :; }
stop() { :; }
EOF
chmod +x /etc/init.d/sysctl
Comment on lines +14 to +20

@GeorgeSapkin GeorgeSapkin Jul 1, 2026

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Why not add this via the Dockerfile?

Otherwise, you can use tab suppression for readability:

Suggested change
cat << 'EOF' > /etc/init.d/sysctl
#!/bin/sh /etc/rc.common
START=11
start() { :; }
stop() { :; }
EOF
chmod +x /etc/init.d/sysctl
cat <<- 'EOF' > /etc/init.d/sysctl
#!/bin/sh /etc/rc.common
START=11
start() { :; }
stop() { :; }
EOF
chmod +x /etc/init.d/sysctl

fi

SYSCTL_PATH=$(command -v sysctl || echo "/sbin/sysctl")
if [ -f "$SYSCTL_PATH" ] && [ ! -f "${SYSCTL_PATH}.real" ]; then
mv "$SYSCTL_PATH" "${SYSCTL_PATH}.real"
cat << EOF > "$SYSCTL_PATH"
#!/bin/sh
# If writing or applying, ignore read-only filesystem errors or do nothing
if echo "\$*" | grep -qE '(-w|=|-p)'; then
"${SYSCTL_PATH}.real" "\$@" 2>/dev/null || true
else
"${SYSCTL_PATH}.real" "\$@"
fi
EOF
chmod +x "$SYSCTL_PATH"
fi

CI_HELPERS="${CI_HELPERS:-/scripts/ci_helpers.sh}"
TEST_PACKAGES="binutils coreutils-timeout file"

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