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cmultithreadingnetwork-programmingpipenamed-pipes
user1305850
user1305850

Reputation: 141

Single direction named pipes

A simple question. If I have 2 programs that needs to access 1 named pipe. If one uses open() function for reading on one end with O_RDONLY flag, would the other end be able to open the file as O_WRONLY and be able to write to it? Would the other program get the written data?

Upvotes: 0

Views: 229

Answers (1)

David
David

Reputation: 58

You can do that.

if you use O_RDWR to open the pipe, it will not block.

if you use O_RDONLY to open the pipe, it will block until the writer opens the pipe, unless you used O_NONBLOCK to make sure to open the pipe successfully.

if you use O_WRONLY to open the pipe, it will block until the reader opens the pipe, but if you also use O_NONBLOCK, the open() will fail.

Upvotes: 1

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