trap on input to a file

2007-12-25 10:52:00

Thanks to:

Thomas Knox

Craig McLean

Sanjiv K. Bhatia

Denise Naomi Ishikawa

Bruce R. Zimmer

Ravi Channavajhala

for their answers. Ideas included using fstat() in C to continually

check the file, sending output to stderr (no can do - it's built

into the binary and I'd still need to set a constant watch),

modifying the program that's generating the message (no can do -

don't have access to them). But the winners, for us scripting guys,

are:

swatch, which is freely available and already set up to do this

stuff, and changing the output file to a named pipe (mknod <file> p).

Using the named pipe is the method I've gone for, mostly because I

received that response first (it also saves me time learning how to

configure swatch - another bonus). I can now read from that pipe and

act on the input as it is received.

Cheers,

Stuart Whitby.

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