From 71c270a6ecaed90fb3801c613f7314c00c4de07a Mon Sep 17 00:00:00 2001
From: Ralph Ronnquist <ralph.ronnquist@gmail.com>
Date: Mon, 30 May 2022 11:51:08 +1000
Subject: [PATCH] use upfront sudo

---
 enitool.lsp | 33 +++++++++++++++++----------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/enitool.lsp b/enitool.lsp
index 2511142..6e72882 100755
--- a/enitool.lsp
+++ b/enitool.lsp
@@ -13,6 +13,11 @@
 
 ;(signal 2 (fn (x) (exit)))
 
+(when (!= "0" (if (exec "id -u") ($it 0) ""))
+  (let ((SUDO (if (exec "command -v sudo") ($it 0) "/usr/bin/sudo")))
+    (wait-pid (process (join (cons SUDO (main-args) " ")))))
+  (exit 0))
+
 (constant
  ;; all "block starters", including blank lines
  'ENI-KEY '( "iface" "mapping" "auto" "allow-\\w*" "rename"
@@ -20,17 +25,15 @@
  ;; regex to identify block starters
  'ENI-HEAD (format "^\\s*#?\\s*(%s)" (join ENI-KEY "|"))
  'ENI-COMMENT "^\\s*#"
- 'PROC (if (exec (format "command -v %s" (or (env "EDITOR") "nano"))) ($it 0)
-         "/bin/nano")
- 'SUDO (if (exec "command -v sudo") ($it 0) "")
+ 'EDITOR (or (env "EDITOR") "nano")
+ 'PROC (if (exec (format "command -v %s" EDITOR)) ($it 0) "/bin/nano")
  )
 
 (define (is-eni-key PAT S)
   (when (regex PAT S 0) true))
 
 (define (is-eni-comment S)
-  (is-eni-key ENI-COMMENT S)
-  )
+  (is-eni-key ENI-COMMENT S))
 
 (define (istrue? A B)
   (list A B) (= A B true))
@@ -40,7 +43,7 @@
 
 ;; Pull out the block headed by the B line. If this head is a blank
 ;; line, then the block includes preceeding comment and the blank line
-;; only. Otherwise it includes preceeding comment, head line and fthe
+;; only. Otherwise it includes preceeding comment, head line and the
 ;; following mix of non-head lines and comment lines (i.e. up to next
 ;; head line). FROM is the line after the prior block, and it is moved
 ;; to end of this block.
@@ -76,18 +79,17 @@
 
 ; Edit a file
 (define (edit-file I FILE)
-  (wait-pid (process (format "%s %s +%d %s" SUDO PROC (int I) FILE))))
+  (wait-pid (process (format "%s +%d %s" PROC (int I) FILE))))
 
 (define (ensure-newline TXT)
   (if (empty? TXT) "" (ends-with TXT "\n") TXT (string TXT "\n")))
 
 (define (update-file B E TXT FILE)
-  ;;(println (list 'update-file B E TXT FILE))
   (let ((DATA (parse (read-file FILE) "\n")))
     (write-file TXT (string (join (0 B DATA) "\n" true)
                             (ensure-newline (read-file TXT))
                             (join (E DATA) "\n")))
-    (exec (format "%s mv %s %s" SUDO TXT FILE))
+    (exec (format "mv %s %s" TXT FILE))
     ))
 
 (define (key-command-select I FILE) ; PATH
@@ -110,7 +112,7 @@
   (let ((BLOCK (find-block (- (int I) 1) FILE))
         (TMP "/tmp/enitool/tmp.conf"))
     (when (= (3 BLOCK) '(""))
-      (exec (format "%s ed %s" SUDO FILE)
+      (exec (format "ed -s %s" FILE)
             (format "%dd\nw\n" (+ 1 (BLOCK 0)))))))
 
 (define (toggle-commenting I FILE)
@@ -134,7 +136,7 @@
      ((member $2 '("KEY_RIGHT" "RETURN")) (key-command-select $1 FILE))
      ((= $2 "d") (delete-block-maybe $1 FILE))
      ((= $2 "#") (toggle-commenting $1 FILE))
-     ((= $2 "e") (edit-file $1 FILE SUDO))
+     ((= $2 "e") (edit-file $1 FILE))
      )))
 
 (define (iselect POS FILE)
@@ -142,12 +144,11 @@
                 "enitool" FILE (int POS) FILE)))
 
 (change-dir "/etc/network")
-(wait-pid (process (format "%s mkdir -m 777 -p /tmp/enitool" SUDO)))
+(wait-pid (process (format "mkdir -m 777 -p /tmp/enitool")))
 
 (while PATH
-  (let ((SEL (apply iselect (PATH 0))) (FILE (PATH 0 1)))
-    (if SEL (command-dispatch (SEL 0) FILE)
-      (pop PATH))
-    ))
+  (if (apply iselect (PATH 0))
+      (command-dispatch ($it 0) (PATH 0 1))
+    (pop PATH)))
 
 (exit 0)
-- 
2.39.2