Displaying a filtered subset of the file in tail mode?

[TheHippoMan]

Is there any way to get "most" to display a filtered version of the file contents when in tail mode?

For example, I'd like to view a growing log file with certain lines being ignored. I'd like to be able to force the non-display of those ignored lines via regular expressions.

For example, suppose the following types of lines are appearing in an ever-growing log file ...

...
Item 1 - running program xyz
Item 2 - program xyz failed
Item 3 - running program abc
Item 4 - running program def
Item 5 - program abc succeeded
Item 6 - program def failed
...

And suppose that I can specify something like the following regex: ignore = /^.*running program.*$/

I would then just like to see lines like the following appearing in the output of "most" when running in tail mode ...

...
Item 2 - program xyz failed
Item 5 - program abc succeeded
Item 6 - program def failed
...

Is there any way to get "most" to behave this way?

[jedsoft]

On Wed, 02 Aug 2023 13:57:35 -0700, TheHippoMan @.***> said:

Is there any way to get "most" to display a filtered version of the file contents when in tail mode?

There is a way but perhaps not what you had in mind:

tail -f /some/log/file | egrep --line-buffered pattern > /tmp/foobar most /tmp/foobar

Apart from that, I have no other suggestion.

Good luck, --John

For example, I'd like to view a growing log file with certain lines being ignored. I'd like to be able to force the non-display of those ignored lines via regular expressions.

For example, suppose the following lines appear in an ever-growing log file ...

...
Item 1 - running program xyz
Item 2 - program xyz failed
Item 3 - running program abc
Item 4 - running program def
Item 5 - program abc succeeded
Item 6 - program def failed
...

And suppose that I can specify something like the following regex: ignore = /^.*running program.*$/

I would then just like to see lines like the following appearing in the output of "most" when running in tail mode ...

...
Item 2 - program xyz failed
Item 5 - program abc succeeded
Item 6 - program def failed
...

Is there any way to get "most" to behave this way?

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