log output to file

src/main.ts

@@ -7,6 +7,19 @@ import path from "node:path"
 import strftime from 'strftime'
 import { spawnSync } from "node:child_process"
 
+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');
+    process.stdout.write = process.stderr.write = access.write.bind(access);
+
+    process.on('uncaughtException', function (err) {
+        console.error((err && err.stack) ? err.stack : err);
+    });
+}
+
 let config: { [key: string]: string } = {}
 let index: { [key: string]: { [key: string]: string } } = {}
 
@@ -56,6 +69,7 @@ program.command('install').description('installs snapback on your system')
 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
         const destination = strftime(config[subvolume])
         const dirname = path.dirname(destination)
@@ -72,6 +86,7 @@ program.command('create-snapshot-post <subvolume> <fstype> <number>')
 program.command('delete-snapshot-post <subvolume> <fstype> <number>')
     .description('delete a backup after deleting a snapshot')
     .action(function (subvolume, fstype, number) {
+        logToFile()
         const destination = index[subvolume][number]
         fs.unlinkSync(destination)
         delete index[subvolume][number]
@@ -81,6 +96,7 @@ program.command('delete-snapshot-post <subvolume> <fstype> <number>')
 program.command('delete-config-post <subvolume> <fstype>')
     .description('delete metadata of deleted subvolume, retaining backups')
     .action(function (subvolume, fstype) {
+        logToFile()
         delete index[subvolume]
         const destination = strftime(config[subvolume])
         const dirname = path.dirname(destination)