Christoph Mallon wrote:
rihad schrieb:
$ mkfifo /var/tmp/foo
$ buffer -i /var/tmp/foo # misc/buffer
# in another console:
$ echo hi > /var/tmp/foo
buffer prints hi and exits. I want it to keep reading and printing
indefinitely.
Further experimentation revealed that I need two writers: one dummy
writer that just keeps /var/tmp/foo open for writing, and the other
doing the "real work". This way buffer wouldn't exit. But how to
emulate the dummy writer? It itself needs to block on something to
keep /var/tmp/foo open. Any clean way to do this in shell? Maybe the
solution is quite simple but isn't at the tip of my tongue.
Maybe "tail -f" is what you are looking for.
You mean in place of buffer? buffer is there for a reason (so that
writers never block).
Something as simple as this:
$ sh < /dev/null > /var/tmp/kick 2>/dev/null
seems to block indefinitely, but exits as soon as I run
$ buffer -i /var/tmp/foo
(and buffer exits too)
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