c - read on many real file descriptors -


working on linux (ubuntu) application. need read many files in non-blocking fashion. unfortunately epoll doesn't support real file descriptor (file descriptor file), support file descriptor that's network socket. select work on real file descriptors, has 2 drawbacks, 1) it's slow, linearly go through file descriptors set, 2) it's limited, typically won't allow more 1024 file descriptors.

i can change each file descriptors non-blocking , use non-blocking "read" poll, it's expensive when there large number of file descriptors.

what options here?

thanks.

update 1 use case here create sort of file server, many clients requesting files, serve them in non-blocking fashion. due network side implementation (not standard tcp/ip stack), can't use sendfile().

you use multiple select calls combined either threading or forking. reduce number of fd_isset calls per select set.

perhaps can provide more details use-case. sounds using select monitor file changes, doesn't work expect regular files. perhaps looking flock


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