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coreutils/src/tail
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Nick Fitzgerald 3972c6eb53 tail: Clean up and test suffix multiplier 
Makes `parse_size` return a `Result` where the `Err` part indicates whether
there was a parsing error, or the parse size is too big to store. Also makes the
value parsed a `u64` rather than a `usize`.

Adds unit tests for `parse_size` and integration tests using the suffix
multiplier in a number passed with the `-n` flag.
2016-04-02 14:16:11 -07:00
..
Cargo.toml Refactor and simplify build for utilities. 2015-12-07 21:56:45 -05:00
main.rs Refactor and simplify build for utilities. 2015-12-07 21:56:45 -05:00
README.md tail: added size suffixes handling 2014-12-01 11:55:39 +01:00
tail.rs tail: Clean up and test suffix multiplier 2016-04-02 14:16:11 -07:00

README.md

Rudimentary tail implementation.

##Missing features:

Flags with features

  • --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

Others

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.