node inotify

gistfile1.js

developer@clouddev:~/dev/tests$ cat watch.js
var fs = require('fs');

var data = 'sample data';
var file = '/tmp/watch_test_file';

fs.writeFileSync(file, data);

fs.watchFile(file, function (curr, prev) {
    console.log('File changed');
});


fs.writeFile(file, data, function (err) {
    if (err) {
        console.log('error writing file');
    } else {
        console.log('file saved');
    }
});


developer@clouddev:~/dev/tests$ node watch.js
File changed
File changed
file saved

----
libuv/src/unix/linux/inotify.c:
146       if (e->mask & (UV__IN_ATTRIB|UV__IN_MODIFY))
147         events |= UV_CHANGE;
148       if (e->mask & ~(UV__IN_ATTRIB|UV__IN_MODIFY))
149         events |= UV_RENAME;

libuv/src/unix/linux/syscalls.h:
60 #define UV__IN_MODIFY         0x002

linux/inotify.h
#define IN_MODIFY               0x00000002      /* File was modified */