V8.00.000.2025.06.17

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

func/cdi_1000_helper/1080_helper_chroot.sh

@@ -14,9 +14,13 @@ guard_sourcing
 
 #######################################
 # Use chroot_exec() for:
-#   - simple commands (e.g., dpkg, ln, mkdir, apt, etc.).
+#   - Simple commands (e.g., dpkg, ln, mkdir, apt, etc.).
 # Use chroot_script() for:
-#   - all shell scripts, redirects, pipes, conditions, loops, or subshells.
+#   - All shell scripts, redirects, pipes, conditions, loops, or subshells.
+# Use chroot_stdin() for:
+#   - Long, multi-line payloads without argv/ARG_MAX pain. Use it to stream robust, quoting-safe scripts via stdin (bash -s).
+#     Ideal for multi-line awk/sed edits, or any content that would otherwise suffer from nested quoting or size limits if
+#     passed via -c.
 #######################################
 
 #######################################
@@ -76,7 +80,7 @@ chroot_exec() {
 }
 
 #######################################
-# Execute a full shell script line inside the chroot via bash -c.
+# Run a complete shell script line inside the chroot using the command 'bash -c'.
 # Globals:
 #   BASH_SOURCE
 #   TERM
@@ -150,7 +154,7 @@ chroot_script() {
 }
 
 #######################################
-# Execute the desired code of the installer via stdin inside the chroot with bash -s.
+# Run the installer-desired code via stdin inside the chroot with bash -s.
 # Globals:
 #   BASH_SOURCE
 #   TERM

func/cdi_4500_user/4520_accounts_setup.sh

@@ -596,19 +596,13 @@ pam_access_sync_login_sshd() {
   declare     var_file_login="/etc/pam.d/login"
   declare     var_file_sshd="/etc/pam.d/sshd"
 
-  ### Guard: files must exist, no-op otherwise.
+  ### Guard: The file must exist, no-op otherwise.
   if [[ ! -f "${TARGET}${var_file_login}" ]]; then
     return 0
   fi
 
-  if [[ ! -f "${TARGET}${var_file_sshd}" ]]; then
-    : ### Still continue, only '/etc/pam.d/login' will be processed
-  fi
-
   ### 1) If the 'pam_access' line is commented in '/etc/pam.d/login', uncomment exactly one occurrence.
-  # shellcheck disable=SC2155
-  declare     var_payload="$(
-    cat <<'CISS'
+  chroot_stdin "${TARGET}" "__payload__" <<'EOF'
 tmp="$(mktemp /etc/pam.d/login.XXXXXX)"
 LC_ALL=C awk '
 BEGIN { done=0 }
@@ -623,46 +617,28 @@ BEGIN { done=0 }
   print
 }
 ' /etc/pam.d/login >| "${tmp}"
-
 test -s "${tmp}"
 mv -f "${tmp}" /etc/pam.d/login
-CISS
-  )"
-
-  chroot_script "${TARGET}" "${var_payload}"
-
-  #chroot_script "${TARGET}" "
-  #  LC_ALL=C awk '
-  #    BEGIN { done=0 }
-  #      {
-  #        if (!done) {
-  #          tmp=\$0
-  #          sub(/^[[:space:]]*#+[[:space:]]*/, \"\", tmp)
-  #            if (tmp ~ /^[[:space:]]*account[[:space:]]+required[[:space:]]+pam_access[.]so([[:space:]]|$)/) {
-  #            print tmp
-  #            done=1
-  #            next
-  #          }
-  #        }
-  #      print
-  #      }
-  #    ' /etc/pam.d/login >| /etc/pam.d/login.new
-  #    mv -f /etc/pam.d/login.new /etc/pam.d/login
-  #  "
+[[ -f "${tmp}" ]] && rm -f "${tmp}"
+EOF
 
   ### 2) If '/etc/pam.d/login' now has an active pam_access line, ensure '/etc/pam.d/sshd' pam_access line(s) are commented out.
-  chroot_script "${TARGET}" "
-    if grep -Eq '^[[:space:]]*account[[:space:]]+required[[:space:]]+pam_access\.so([[:space:]]|$)' /etc/pam.d/login; then
-      if [[ -f /etc/pam.d/sshd ]]; then
-        awk '
-          ### Comment only active matches; keep pre-commented lines untouched.
-          /^[[:space:]]*account[[:space:]]+required[[:space:]]+pam_access\.so([[:space:]]|$)/ { print \"# \" \$0; next }
+  ###    No-op if '/etc/pam.d/sshd' is absent.
+  [[ -f "${TARGET}${var_file_sshd}" ]] || return 0
+
+  chroot_stdin "${TARGET}" "__payload__" <<'EOF'
+LC_ALL=C
+if grep -Eq '^[[:space:]]*account[[:space:]]+required[[:space:]]+pam_access[.]so([[:space:]]|$)' /etc/pam.d/login; then
+  tmp="$(mktemp /etc/pam.d/sshd.XXXXXX)"
+  LC_ALL=C awk '
+    /^[[:space:]]*account[[:space:]]+required[[:space:]]+pam_access[.]so([[:space:]]|$)/ { print "# " $0; next }
     { print }
-        ' /etc/pam.d/sshd >| /etc/pam.d/sshd.new
-        mv -f /etc/pam.d/sshd.new /etc/pam.d/sshd
+  ' /etc/pam.d/sshd >| "${tmp}"
+  test -s "${tmp}"
+  mv -f "${tmp}" /etc/pam.d/sshd
+  [[ -f "${tmp}" ]] && rm -f "${tmp}"
 fi
-    fi
-  "
+EOF
 
   return 0
 }

lib/cdi_0060_traps/0060_trap_err.sh

@@ -36,6 +36,7 @@ guard_sourcing
 #   VAR_DEBUG_TRACE
 #   VAR_DEBUG_TRAP
 #   VAR_GIT_REL
+#   VAR_HEADROOM
 #   VAR_PARAM_COUNT
 #   VAR_PARAM_STRNG
 #   VAR_RESOURCES
@@ -68,6 +69,7 @@ print_file_err() {
     printf "❌ Script PID             : %s %b" "${$}" "${NL}"
     printf "❌ Script Runtime         : %s %b" "${VAR_SCRIPT_RUNTIME}" "${NL}"
     printf "❌ System Resources       : %s %b" "${VAR_RESOURCES}" "${NL}"
+    printf "❌ Approx. Stack Headroom : %s %b" "${VAR_HEADROOM}" "${NL}"
     printf "❌ Arguments Counter      : %s %b" "${VAR_PARAM_COUNT}" "${NL}"
     printf "❌ Arguments Original     : %s %b" "${VAR_PARAM_STRNG}" "${NL}"
     printf "❌ Arguments Sanitized    : %s %b" "${VAR_ARG_SANITIZED}" "${NL}"
@@ -114,6 +116,7 @@ print_file_err() {
 #   VAR_DEBUG_TRACE
 #   VAR_DEBUG_TRAP
 #   VAR_GIT_REL
+#   VAR_HEADROOM
 #   VAR_PARAM_COUNT
 #   VAR_PARAM_STRNG
 #   VAR_RESOURCES
@@ -145,6 +148,7 @@ print_scr_err() {
   printf "%b❌ Script PID             : %s %b%b" "${RED}" "${$}" "${RES}" "${NL}"
   printf "%b❌ Script Runtime         : %s %b%b" "${RED}" "${VAR_SCRIPT_RUNTIME}" "${RES}" "${NL}"
   printf "%b❌ System Resources       : %s %b%b" "${RED}" "${VAR_RESOURCES}" "${RES}" "${NL}"
+  printf "%b❌ Approx. Stack Headroom : %s %b%b" "${RED}" "${VAR_HEADROOM}" "${RES}" "${NL}"
   printf "%b❌ Arguments Counter      : %s %b%b" "${RED}" "${VAR_PARAM_COUNT}" "${RES}" "${NL}"
   printf "%b❌ Arguments Original     : %s %b%b" "${RED}" "${VAR_PARAM_STRNG}" "${RES}" "${NL}"
   printf "%b❌ Arguments Sanitized    : %s %b%b" "${RED}" "${VAR_ARG_SANITIZED}" "${RES}" "${NL}"
@@ -220,6 +224,7 @@ trap_err() {
   declare -g ERRCMMD="$5"
   # shellcheck disable=SC2034
   declare -g ERRTRAP="true"
+  declare -g VAR_HEADROOM=$(( $(getconf ARG_MAX) - $(printenv -0 | wc -c) - 4096 ))
 
   trap - DEBUG ERR INT TERM
 

lib/cdi_0060_traps/0070_trap_exit.sh

@@ -147,6 +147,8 @@ trap_exit_non_zero() {
 
   if [[ "${ERRTRAP}" == "false" ]]; then
 
+    declare VAR_HEADROOM=$(( $(getconf ARG_MAX) - $(printenv -0 | wc -c) - 4096 ))
+
     if [[ "${VAR_DEBUG_TRACE}" == "true" || "${VAR_DEBUG_TRAP}" == "true" ]]; then dump_vars_exiting; fi
 
     case "${VAR_IN_DIALOG_WR}" in
@@ -181,6 +183,7 @@ trap_exit_non_zero() {
     printf "%b❌ Script PID             : %s %b%b" "${RED}" "${$}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
     printf "%b❌ Script Runtime         : %s %b%b" "${RED}" "${VAR_SCRIPT_RUNTIME}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
     printf "%b❌ System Resources       : %s %b%b" "${RED}" "${VAR_RESOURCES}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
+    printf "%b❌ Approx. Stack Headroom : %s %b%b" "${RED}" "${VAR_HEADROOM}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
     printf "%b❌ Arguments Counter      : %s %b%b" "${RED}" "${VAR_PARAM_COUNT}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
     printf "%b❌ Arguments Original     : %s %b%b" "${RED}" "${VAR_PARAM_STRNG}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"
     printf "%b❌ Arguments Sanitized    : %s %b%b" "${RED}" "${VAR_ARG_SANITIZED}" "${RES}" "${NL}" | tee -a "${LOG_EXT}"