Add noexec /tmp detection — fall back to /usr/local/src for staging

Scripts auto-detect noexec /tmp by attempting to execute a test script.
If /tmp is noexec, staging directory falls back to /usr/local/src.
Supports mixed fleets with both noexec and standard /tmp mounts.

Updated: deploy-exporter (1.1), install-node-exporter (1.2),
install-prometheus-stack (3.2), update-prometheus-stack (1.02),
install-snort (1.02), install-ntfy-server (1.1), install-bot-monitor (1.2)

install-ntfy-server.sh

@@ -7,7 +7,7 @@
 #### Author: Phil Connor                                 ####
 #### Contact: contact@mylinux.work                       ####
 #### License: MIT                                        ####
-#### Version: 1.0                                        ####
+#### Version: 1.1                                        ####
 ####                                                     ####
 #### Usage: sudo ./install-ntfy-server.sh                ####
 #############################################################
@@ -28,6 +28,18 @@ if [[ $EUID -ne 0 ]]; then
     exit 1
 fi
 
+# Detect noexec /tmp — fall back to /usr/local/src
+STAGE_DIR="/tmp"
+_exec_test=$(mktemp /tmp/.exec_test.XXXXXX 2>/dev/null)
+if [[ -n "$_exec_test" ]]; then
+    printf '#!/bin/sh\nexit 0\n' > "$_exec_test"
+    chmod +x "$_exec_test"
+    "$_exec_test" 2>/dev/null || STAGE_DIR="/usr/local/src"
+    rm -f "$_exec_test"
+else
+    STAGE_DIR="/usr/local/src"
+fi
+
 echo "=== Installing ntfy v${NTFY_VERSION} ==="
 
 # Create ntfy user
@@ -43,13 +55,13 @@ chown "$NTFY_USER:$NTFY_USER" "$NTFY_DIR"
 
 # Download and install ntfy
 echo "Downloading ntfy..."
-rm -rf /tmp/ntfy_extract
-mkdir -p /tmp/ntfy_extract
-wget -q -O /tmp/ntfy.tar.gz "https://github.com/binwiederhier/ntfy/releases/download/v${NTFY_VERSION}/ntfy_${NTFY_VERSION}_linux_amd64.tar.gz"
-tar -xzf /tmp/ntfy.tar.gz -C /tmp/ntfy_extract
-find /tmp/ntfy_extract -name "ntfy" -type f -exec mv {} /usr/local/bin/ntfy \;
+rm -rf ${STAGE_DIR}/ntfy_extract
+mkdir -p ${STAGE_DIR}/ntfy_extract
+wget -q -O ${STAGE_DIR}/ntfy.tar.gz "https://github.com/binwiederhier/ntfy/releases/download/v${NTFY_VERSION}/ntfy_${NTFY_VERSION}_linux_amd64.tar.gz"
+tar -xzf ${STAGE_DIR}/ntfy.tar.gz -C ${STAGE_DIR}/ntfy_extract
+find ${STAGE_DIR}/ntfy_extract -name "ntfy" -type f -exec mv {} /usr/local/bin/ntfy \;
 chmod +x /usr/local/bin/ntfy
-rm -rf /tmp/ntfy.tar.gz /tmp/ntfy_extract
+rm -rf ${STAGE_DIR}/ntfy.tar.gz ${STAGE_DIR}/ntfy_extract
 
 # Verify installation
 echo "Verifying installation..."