Dropbox and security of your files in Linux
WAT?
So there's been discussion about Dropbox indexing all files on Windows boxes
It basically tells that Dropbox scans all the files in the whole drive:
Dropbox syncs not only its own folder but also everything in local drive (C:) without any user consent or permission.
How about Linux?
First of all - if you're sane Linux user than you use one of the Linux Security Modules (LSMs) and literally don't give a fuck. Even when Steam wants to delete all your files in hard-drive you show him a middle finger and praise Dan Walsh for his work
I'll tell this one more time - use SELinux. Read this book - it's only 100 pages for the sake. Or use AppArmor if SELinux is too hard for you. Then you will never find yourself again in such hard position.
Erm.. Linux again?
Ok, let's say you don't use SELinux (because if you did you wouldn't have to read this).
So I run Dropbox (default datadir in ~/Dropbox) and fetched its PID and attached strace:
strace -f -e trace=file -s 1024 -p 6033 -o ~/tmp/dropbox-wtf.txt
Now I tried to create a file outside of ~/Dropbox directory:
touch ~/tmp/wtf.txt
... and ...
N O T H I N G
Quiet
Peace
Later on just to confirm I created a file in ~/Dropbox/tmp and got a ton of crap from the strace - filtered out the ENOENT so it's more clear (nothing interesting there):
6308 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6308 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 35
6308 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6308 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 35
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 48
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOATIME) = 35
6294 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 35
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY) = 35
6294 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 47
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOATIME) = 47
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOATIME) = 35
6294 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 47
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt/.dropbox.attr", O_RDONLY|O_NOCTTY) = -1 ENOTDIR (Not a directory)
6294 lstat("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", {st_mode=S_IFREG|0664, st_size=4, ...}) = 0
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOFOLLOW|O_NOATIME) = 35
6294 open("/home/putinstopattackingukraine/Dropbox/tmp/wtf.txt", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_NOATIME) = 35
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/filecache.dbx", {st_mode=S_IFREG|0644, st_size=26258432, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/filecache.dbx-journal", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 48
6294 stat("/var/tmp", {st_mode=S_IFDIR|S_ISVTX|0777, st_size=4096, ...}) = 0
6294 access("/var/tmp", R_OK|W_OK|X_OK) = 0
6294 open("/var/tmp/etilqs_1GCo6ezszP3OnQ1", O_RDWR|O_CREAT|O_EXCL|O_NOFOLLOW|O_CLOEXEC, 0600) = 52
6294 unlink("/var/tmp/etilqs_1GCo6ezszP3OnQ1") = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1", O_RDONLY|O_CLOEXEC) = 54
6294 unlink("/home/putinstopattackingukraine/.dropbox/instance1/filecache.dbx-journal") = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 35
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
6294 open("/dev/urandom", O_RDONLY) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 open("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", O_RDWR|O_CREAT|O_CLOEXEC, 0644) = 47
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/UPDATED_jt6wdD", {st_mode=S_IFREG|0600, st_size=7168, ...}) = 0
6294 stat("/home/putinstopattackingukraine/.dropbox/instance1/PENDING_FIbd69", {st_mode=S_IFREG|0600, st_size=5120, ...}) = 0
So we basically see that Dropbox reads only its datadir (~/Dropbox), config dir (~/.dropbox), urandom device (probably generating bitcoins, but this is ok), and /var/tmp (not sure however what kind of tmpfiles it creates - but this would be rather performance question).
So we're safe. Dropbox does not read all the file contents on Linux.
But once again - start using Linux Security Modules!
