On 07/03/18 08:05 AM, Peter Suetterlin wrote:
Wols Lists wrote:
On 07/03/18 09:05, Peter Suetterlin wrote:
James Knott wrote:
I thought everything on *nix was supposed to be a file. Yes, my thought, too.
No: its more that everything is accessible though the file system tree. Th is, you have "/dev/tty1" instead of the out of band "COM1:".
Except when it's not. Like networking, for example.
Well, yes and no. There were implementations of UNIX that did have /dev/tcp but what happened form there on down was subject to debate. Clearly there should be entries for open connections, but should they be by name or by IP address? What should be their access characteristics? Not just permissions, but many other things that have to be dealt with when using open connections. It's a minefield and the simplest answer is "Don't Go There". If anyone knows more abut this I'd be interested in hearing/learning. But see, for example https://en.wikipedia.org/wiki/9P_(protocol)
But files
Read: "entries in the hierarchical file system"
can be both character (sequential access) or block (direct access). So ttyS0 is a sequential (character) file, while sda is a block (direct access) file.
Yes, sure. But the point was that this should not matter when just changing the permissions, which is what the 'z' was supposed to do. But probably it was indeed a timing issue, as Andrei suspected.
Yes. -- A: Yes. > Q: Are you sure? >> A: Because it reverses the logical flow of conversation. >>> Q: Why is top posting frowned upon? -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org