Update CHANGELOG.md

* Harden remote func bootstrapping

Replace bare `source <(curl ...)` calls with a `_bootstrap_source` helper that validates both the download exit code and the presence of a probe function after sourcing. This prevents silent failures when DNS is not yet available in a freshly booted container or when a download fails mid-stream. Applies to build.func, install.func, and alpine-install.func. Also adds retry flags and a connect timeout to curl/wget.

* Refactor bootstrap error handling with helper

Extract repeated fatal-error logic into a `_bootstrap_die` helper across alpine-install.func, build.func, and install.func. The helper uses `msg_error` when available, falling back to stderr, then exits with code 115. Inline error blocks are replaced with cleaner one-liner `|| _bootstrap_die` calls.

CHANGELOG.md

@@ -508,6 +508,22 @@ Exercise vigilance regarding copycat or coat-tailing sites that seek to exploit
 
 </details>
 
+## 2026-07-29
+
+### 🚀 Updated Scripts
+
+  - backup virtual printer in bambuddy [@asylumexp](https://github.com/asylumexp) ([#16142](https://github.com/community-scripts/ProxmoxVE/pull/16142))
+
+  - #### 🐞 Bug Fixes
+
+    - ImmichFrame: check .NET SDK before update deployment [@aidaskni](https://github.com/aidaskni) ([#16104](https://github.com/community-scripts/ProxmoxVE/pull/16104))
+
+### 💾 Core
+
+  - #### ✨ New Features
+
+    - core: Harden remote func bootstrapping with dns issues [@MickLesk](https://github.com/MickLesk) ([#16146](https://github.com/community-scripts/ProxmoxVE/pull/16146))
+
 ## 2026-07-28
 
 ### 🚀 Updated Scripts

ct/immichframe.sh

@@ -30,6 +30,25 @@ function update_script() {
     exit
   fi
 
+  if ! dotnet --list-sdks 2>/dev/null | grep -q '^8\.'; then
+    msg_info "Installing .NET SDK 8.0"
+    if [[ "$(arch_resolve)" == "arm64" ]]; then
+      curl -fsSL https://dot.net/v1/dotnet-install.sh -o /tmp/dotnet-install.sh
+      $STD bash /tmp/dotnet-install.sh --channel 8.0 --install-dir /usr/lib/dotnet8
+      ln -sf /usr/lib/dotnet8/dotnet /usr/bin/dotnet
+      rm -f /tmp/dotnet-install.sh
+    else
+      setup_deb822_repo \
+        "microsoft" \
+        "https://packages.microsoft.com/keys/microsoft-2025.asc" \
+        "https://packages.microsoft.com/debian/13/prod/" \
+        "trixie" \
+        "main"
+      $STD apt install -y dotnet-sdk-8.0
+    fi
+    msg_ok "Installed .NET SDK 8.0"
+  fi
+
   if check_for_gh_release "immichframe" "immichFrame/ImmichFrame"; then
     msg_info "Stopping Service"
     systemctl stop immichframe

misc/alpine-install.func

@@ -10,8 +10,29 @@ fi
 # must write local failure artifacts instead of talking to the telemetry API
 # (the host is the single telemetry reporter).
 export TELEMETRY_CONTEXT="container"
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
+# A freshly booted container may not have DNS up yet. `source <(curl ...)` hides
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
+# curl's exit code, so a failed download would silently source an empty stream.
+_bootstrap_die() {
+  if declare -f msg_error >/dev/null 2>&1; then
+    msg_error "$1"
+  else
+    echo "FATAL: $1" >&2
+  fi
+  exit 115
+}
+
+_bootstrap_source() {
+  local url="$1" probe="$2" content
+  content=$(curl -fsSL --connect-timeout 10 --retry 5 --retry-connrefused --retry-delay 2 "$url") ||
+    _bootstrap_die "Failed to download ${url##*/}"
+  source /dev/stdin <<<"$content"
+  declare -f "$probe" >/dev/null 2>&1 ||
+    _bootstrap_die "${url##*/} loaded but incomplete (missing ${probe})"
+}
+
+_FUNC_BASE="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc"
+_bootstrap_source "$_FUNC_BASE/core.func" load_functions
+_bootstrap_source "$_FUNC_BASE/error_handler.func" catch_errors
 load_functions
 catch_errors
 

misc/build.func

@@ -88,19 +88,38 @@ variables() {
   fi
 }
 
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/api.func)
+# `source <(curl ...)` hides the download exit code, so a failed fetch would
+# silently source an empty stream and leave the helpers undefined.
+_bootstrap_die() {
+  if declare -f msg_error >/dev/null 2>&1; then
+    msg_error "$1"
+  else
+    echo "FATAL: $1" >&2
+  fi
+  exit 115
+}
 
-if command -v curl >/dev/null 2>&1; then
+_bootstrap_source() {
-  source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
+  local url="$1" probe="$2" content=""
-  source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
+  if command -v curl >/dev/null 2>&1; then
-  load_functions
+    content=$(curl -fsSL --connect-timeout 10 --retry 5 --retry-connrefused --retry-delay 2 "$url") || content=""
-  catch_errors
+  elif command -v wget >/dev/null 2>&1; then
-elif command -v wget >/dev/null 2>&1; then
+    content=$(wget -qO- --tries=5 --timeout=10 "$url") || content=""
-  source <(wget -qO- https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
+  else
-  source <(wget -qO- https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
+    _bootstrap_die "Neither curl nor wget available"
-  load_functions
+  fi
-  catch_errors
+  [[ -n "$content" ]] || _bootstrap_die "Failed to download ${url##*/}"
-fi
+  source /dev/stdin <<<"$content"
+  declare -f "$probe" >/dev/null 2>&1 ||
+    _bootstrap_die "${url##*/} loaded but incomplete (missing ${probe})"
+}
+
+_FUNC_BASE="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc"
+_bootstrap_source "$_FUNC_BASE/api.func" post_to_api
+_bootstrap_source "$_FUNC_BASE/core.func" load_functions
+_bootstrap_source "$_FUNC_BASE/error_handler.func" catch_errors
+load_functions
+catch_errors
 
 # ==============================================================================
 # SECTION 2: PRE-FLIGHT CHECKS & SYSTEM VALIDATION

misc/install.func

@@ -37,8 +37,29 @@ fi
 # (the host is the single telemetry reporter).
 export TELEMETRY_CONTEXT="container"
 
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/core.func)
+# A freshly booted container may not have DNS up yet. `source <(curl ...)` hides
-source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/error_handler.func)
+# curl's exit code, so a failed download would silently source an empty stream.
+_bootstrap_die() {
+  if declare -f msg_error >/dev/null 2>&1; then
+    msg_error "$1"
+  else
+    echo "FATAL: $1" >&2
+  fi
+  exit 115
+}
+
+_bootstrap_source() {
+  local url="$1" probe="$2" content
+  content=$(curl -fsSL --connect-timeout 10 --retry 5 --retry-connrefused --retry-delay 2 "$url") ||
+    _bootstrap_die "Failed to download ${url##*/}"
+  source /dev/stdin <<<"$content"
+  declare -f "$probe" >/dev/null 2>&1 ||
+    _bootstrap_die "${url##*/} loaded but incomplete (missing ${probe})"
+}
+
+_FUNC_BASE="https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc"
+_bootstrap_source "$_FUNC_BASE/core.func" load_functions
+_bootstrap_source "$_FUNC_BASE/error_handler.func" catch_errors
 load_functions
 catch_errors