coreutils/tail/README.md at 3d139aecc2edc7e3051ca889a4341c9a634770a6

mirror of https://github.com/uutils/coreutils synced 2024-11-17 18:28:18 +00:00

Morten Olsen Lysgaard 17afa8a1fd Rudamentary tail implementation.

For specific info on missing features and optimizations,
look at tail/README.md

2014-06-12 23:29:50 +02:00

Rudamentary tail implementation.

##Missing features:

--bytes : output the last K bytes; alternatively, use -c +K to output bytes starting with the Kth of each file
--max-unchanged-stats : with --follow=name, reopen a FILE which has not changed size after N (default 5) iterations to see if it has been unlinked or renamed (this is the usual case of rotated log files). With inotify, this option is rarely useful.
--pid : with -f, terminate after process ID, PID dies
--quiet : never output headers giving file names
--retry : keep trying to open a file even when it is or becomes inaccessible; useful when follow‐ing by name, i.e., with --follow=name
--verbose : always output headers giving file names

The current implementation does not handle - as an alias for stdin.

##Possible optimizations:

Don't read the whole file if not using -f and input is regular file. Read in chunks from the end going backwards, reading each individual chunk forward.