What does return 0 mean when i write socket?

Question

What does return 0(or -1) mean when i write(or read) socket in C on linux?

And Under what circumstances will these things happen?

and how to deal with errno==EINTR?

using write() and read() functions.

This question is off-topic because it exhibits zero evidence of prior research, and is already answered by the existing documentation. — user207421, Jan 06 '14 at 10:23
I think he/her has the answer now ... with the burden of some downvotes. — Liviu, Jan 06 '14 at 10:40

score 3 · Accepted Answer · answered Jan 06 '14 at 10:20

3

If you encounter an EINTR you can usually ignore it and keep on reading.

answered Jan 06 '14 at 10:20

Devolus

1

If you have a singal handler you might want to do something (depends on your code), but in the general case you can ignore it. I.e. if you have a timer, or want to interrupt your wait, shutdown, etc.. – Devolus Jan 06 '14 at 10:37

score 1 · Answer 2 · edited May 23 '17 at 10:32

1

EINTR indicates that operation is interrupted by a signal. You can ignore it and continue read/write. You can find more information Here.

edited May 23 '17 at 10:32

Community

answered Jan 06 '14 at 10:23

Chinna

2 Answers2