example: async reading and async writing of /etc/hosts

1 files changed, 29 insertions, 0 deletions

diff --git a/examples/async-write-etc-hosts.js b/examples/async-write-etc-hosts.js
new file mode 100644
index 0000000..70640ab
--- /dev/null
+++ b/examples/async-write-etc-hosts.js
@@ -0,0 +1,29 @@
+var aug = require('../build/Release/libaugeas');
+
+// NOTE:
+// running this example as non-root user will probably fail,
+// but for the goodness sake we set AUG_SAVE_NEWFILE flag here,
+// so your /etc/hosts will be kept untouched :-)
+aug.createAugeas(
+        {lens: 'hosts', incl: '/etc/hosts', flags:aug.AUG_SAVE_NEWFILE},
+        function(aug) {
+            if (!aug.error()) {
+                console.log('Making changes ...');
+                aug.set('/files/etc/hosts/1/ipaddr', '127.0.0.2');
+                aug.set('/files/etc/hosts/1/canonical', 'localhost');
+                aug.save(function(success) {
+                    if (success) {
+                        console.log('Saved! Take a look at /etc/hosts.augnew');
+                    } else {
+                        console.log('Failed :-( Here is the reason:');
+                        console.log(aug.get('/augeas/files/etc/hosts/error/message'));
+                    }
+                });
+                console.log('Saving started!');
+            } else {
+                console.log('Sad, but true :-(');
+            }
+        }
+);
+console.log('Waiting for Augeas ...');
+