* tail: reduce CPU load for polling
This reduces the CPU load for polling drastically (from ~80% down to ~5%)
by removing/fixing several previous workarounds related to polling,
while still passing all related GNU test-suite checks.
* set Notify::PollWatcher delay to: sleep_sec/10 instead of
sleep_sec/100
* set recv_timeout to sleep_sec instead of sleep_sec/100
* remove the manual polling of watched files
Bugs:
* fix an issue with headers to consistently pass
"test_follow_name_retry_headers" and "gnu/tests/tail-2/overlay-headers.sh"
Code clean-up and refactor
* make fields of struct FileHandling private (and add getters/setters)
to ensure that the paths are absolute and match the paths returned by
Notify::Events
* replace calls to "crash!" with "return USimpleError"
* clean-up formatting
On macOS path.is_dir() can be false for directories
if it was a redirect, e.g. ` tail < DIR`
* fix some tests for macOS
Cleanup:
* fix clippy/spell-checker
* fix build for windows by refactoring stdin_is_pipe_or_fifo()
* add various tests adapted from `gnu/tests/tail-2/follow-stdin.sh`
* explicitly set_stdin to null where needed, otherwise stdin is always
`piped`
* tighten some existing tests (no_stderr, code_is, etc)
* add test for fifo
* add various tests adapted from `gnu/tests/tail-2/follow-stdin.sh`
* explicitly set_stdin to null where needed, otherwise stdin is always
`piped`
* tighten some existing tests (no_stderr, code_is, etc)
* add test for fifo
* Fix a timing related bug with polling (---disable-inotify) where some
Events weren't delivered fast enough by `Notify::PollWatcher` to pass all
of tests/tail-2/retry.sh and test_tail::{test_retry4, retry7}.
* uu_tail now reverts to polling automatically if inotify backend reports
too many open files (this mimics the behavior of GNU's tail).
This makes uu_tail pass the "gnu/tests/tail-2/inotify-only-regular" test
again by adding support for charater devices.
test_tail:
* add test_follow_inotify_only_regular
* add clippy fixes for windows
Fix a bug where `tail -f` would terminate with an error due to failing
to parse a UTF-8 string from a sequence of bytes read from the
followed file. This commit replaces the call to `BufRead::read_line()`
with a call to `BufRead::read_until()` so that any sequence of bytes
regardless of encoding can be read.
Fixes#1050.
Fix a bug when getting all but the first NUM lines or bytes of a file
via `tail -n +NUM <file>` or `tail -c +NUM <file>`. The bug only
existed when a file is given as an argument; it did not exist when the
input data came from stdin.
Support `-z` option when the input is not a seekable file. Previously,
the option was accepted by the argument parser, but it was being
ignored by the application logic.
This makes uu_tail pass the "gnu/tests/tail-2/descriptor-vs-rename" test.
* add tests for descriptor-vs-rename (with/without verbose)
* fix some minor error messages
* Change data structure from Vec to HashMap in order to better
keep track of files while watching them with `--follow=name`.
E.g. file paths that were removed while watching them and exit
if no files are remaining, etc.
* Move all logic related to file handling into a FileHandling trait
* Simplify handling of the verbose flag.
