> On Feb 21, 2024, at 2:52 AM, Sad Clouds <cryintotheblue...@gmail.com> wrote: > > Hello, for most operating systems determining the size of a block > device can be done with: > > lseek(fd, 0, SEEK_END);
On what operating systems does this do what you claim? > However, on NetBSD this does not seem to work. It doesn’t work on macOS, either: thorpej-mbp:thorpej 541$ sudo ./lseek /dev/disk4 Password: lseek(fd, 4096, SEEK_SET) = 4096 bytes lseek(fd, 0, SEEK_END) = 0 bytes thorpej-mbp:thorpej 542$ -- thorpej
