* 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
The code for creating a Passwd from the fields of the raw syscall result
assumed that the syscall would return valid C strings in all non-error
cases. This is not true, and at least one platform (Android) will
populate the fields with null pointers where they are not supported.
To fix this and prevent the error from happening again, this commit
changes `cstr2string(ptr)` to check for a null pointer, and return an
`Option<String>`, with `None` being the null pointer case. While
arguably it should be the caller's job to check for a null pointer
before calling (since the safety precondition is that the pointer is to
a valid C string), relying on the type checker to force remembering this
edge case is safer in the long run.
Add a missing dash to the `--total` argument applied in the
`test_df_output` test case. Before this commit, the argument `-total`
was treated as a path argument. After this commit, `--total` is
treated as a command-line option that causes the total file usage to
be displayed.
* hashsum: add --no-names option from official b3sum tool
The official b3sum tool has a --no-names option for only printing the
hashes, omitting the filenames. This is quite handy when used from
scripts because it spares the postprocessing with "cut" or "awk".
Since the installed b3sum symlink would also serve as a drop-in for the
official tool, the --no-names option is expected to exist for
compatibility.
Add a --no-names option not only for b3sum but for hashsum in general
(and maybe GNU coreutils will also feel inspired to add this option).
Closes https://github.com/uutils/coreutils/issues/3360
