[YBA] No cyclical file in Linux?

[Omer Zak]

Would the following meet your need?

1. Delete the original /var/log/syslog and create a FIFO with the same
name.
2. Start a process, whose stdin is the above FIFO, and which runs a
short program or a script, whose output is a disk file.  The script
would manage the output file as a cyclical buffer, using
mmap()/fseek()/ftell().


On Tue, 2010-03-02 at 00:04 +0200, Jonathan Ben Avraham wrote:
> Hi Omer,
> I'm looking for a file that contains the contents of the last N write 
> operations to the file where the total size of the last N operations is 
> less than or equal to some limit K.
> 
> A cyclical buffer that has a file API and is flushed to disk (FLASH) 
> automatically at some interval or at every write would do this. Even a 
> cyclical buffer in RAM with a file API would be fine.
> 
> I want to output syslog to this file.

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