handle and log unknown items

src/main.ts

@@ -7,12 +7,14 @@ import path from "node:path"
 import strftime from 'strftime'
 import { spawnSync } from "node:child_process"
 
+const logfd = fs.openSync('/etc/snapback/log.txt', 'w')
+
 function logToFile() {
     // Source - https://stackoverflow.com/a/35542360
     // Posted by Anatol - user3173842
     // Retrieved 2026-01-14, License - CC BY-SA 3.0
 
-    var access = fs.createWriteStream('/etc/snapback/log.txt');
+    var access = fs.createWriteStream('',{'fd':logfd});
     process.stdout.write = process.stderr.write = access.write.bind(access);
 
     process.on('uncaughtException', function (err) {
@@ -20,11 +22,11 @@ function logToFile() {
     });
 }
 
-let config: { [key: string]: string } = {}
-let index: { [key: string]: { [key: string]: string } } = {}
+let config: { [key: string]: string|undefined } = {}
+let index: { [key: string]: { [key: string]: string|undefined }|undefined } = {}
 
 function sugoiSpawn(...command: string[]) {
-    const result = spawnSync(command.shift()!, command, { stdio: 'inherit' })
+    const result = spawnSync(command.shift()!, command, { stdio: ['ignore',logfd,logfd] })
     if (result.error) throw result.error
     if (result.status !== 0) process.exit(result.status)
     return result
@@ -70,7 +72,7 @@ program.command('create-snapshot-post <subvolume> <fstype> <number>')
     .description('create a backup after a snapshot')
     .action(function (subvolume, fstype, number) {
         logToFile()
-        if (!config[subvolume]) return
+        if (!config[subvolume]) {console.log(subvolume + ' not configured for snapback'); return}
         const destination = strftime(config[subvolume])
         const dirname = path.dirname(destination)
         try { fs.mkdirSync(dirname, { 'recursive': true }) } catch {}
@@ -79,6 +81,7 @@ program.command('create-snapshot-post <subvolume> <fstype> <number>')
             '--create', '--file', destination,
             '--auto-compress', '--dereference', '.'
         )
+        if(!index[subvolume]) index[subvolume]={}
         index[subvolume][number] = destination
         console.log('created backup at '+destination)
     })
@@ -87,7 +90,15 @@ program.command('delete-snapshot-post <subvolume> <fstype> <number>')
     .description('delete a backup after deleting a snapshot')
     .action(function (subvolume, fstype, number) {
         logToFile()
+        if (!index[subvolume]) {
+            console.log('no backups indexed for ' + subvolume)
+            return
+        }
         const destination = index[subvolume][number]
+        if (!destination) {
+            console.log('no backup indexed for ' + subvolume + ':' + number)
+            return
+        }
         fs.unlinkSync(destination)
         delete index[subvolume][number]
         console.log('deleted backup at '+destination)
@@ -98,6 +109,10 @@ program.command('delete-config-post <subvolume> <fstype>')
     .action(function (subvolume, fstype) {
         logToFile()
         delete index[subvolume]
+        if (!config[subvolume]) {
+            console.log(subvolume + ' not configured for snapback')
+            return
+        }
         const destination = strftime(config[subvolume])
         const dirname = path.dirname(destination)
         console.log('existing backups remain at '+dirname)