html report output when input from STDIN

[Wytze van der Raay]

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Hi Mikael,

> I'm trying to get HTML outputs via lr_log2report.
> lire user does not have read permissions on the log file so I must feed
> the logfile via STDIN.
> 
> I'm sorry to post this dumb question but I've not found out how to handle
> the output :(
> 
> What I've tried :
> 
> #su - lire -c "lr_log2report -o html syslog" < /path/servers.log > out.tar
> Parsing log file using syslog DLF Converter...
> Extracted 730 DLF records on 730 lines.
> Encountered 0 errors and ignored 0 lines.
> Running analysers...
> Generating XML report...
> Formatting report as html in -...
> /bin/tar: report: Cannot stat: No such file or directory
> /bin/tar: Error exit delayed from previous errors

The syntax for lr_log2report is:

    lr_log2report [options] dlf_converter [ logfile ] [ output_file ]

In your case you are omitting the optional 'logfile' and 'output_file'
arguments, since you are using stdin and stdout instead. Internally
this is handled by substituting '-' for these arguments. But for the
special case of the '-o html' output format, 'output_file' will be
interpreted as a directory name (and output direction is effectively
ignored, which could be considered a bug). The directory is used to
unpack the tar file containing the html-formatted report. Since you
probably don't have a directory named '-', the shown error message results.

The workaround for this problem is to explictly specify the 'logfile'
and 'output_file' arguments. For 'logfile' you can specify '-' to indicate
that you want the log file data to be read from stdin. For 'output_file'
you should specify the name of a directory -- it is OK to specify a name
which does not exist yet, since lr_log2report will create the directory
for you in that case. E.g:

	# su - lire -c "lr_log2report -o html syslog - /tmp/new_dir" \
		</path/servers.log

should work for you.

Regards,
Wytze van der Raay

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