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Re: case of printf >fifo hang in int trap
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From: |
Greg Wooledge |
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Subject: |
Re: case of printf >fifo hang in int trap |
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Date: |
Sun, 13 Feb 2022 15:40:04 -0500 |
On Sun, Feb 13, 2022 at 07:33:48PM +0100, Alex fxmbsw7 Ratchev wrote:
> so i have, mkfifo fifo ; trap 'printf nowork>fifo' int, it hangs on it
This is expected. Any process that opens a FIFO for read or write is
supposed to block (hang) until a *second* process opens it for the
opposite (write or read). Once the pipe has been opened twice, once in
each direction, then both processes are un-blocked.