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Make the 'history' and 'r' commands builtins (#76)

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With this change no more preset aliases exist, so the preset alias
tables can be safely removed. All ksh commands can now be used
without 'unalias -a' removing them, even in interactive shells.
Additionally, the history and r commands are no longer limited to
being used in interactive shells.

src/cmd/ksh93/bltins/hist.c:
- Implement the history and r commands as builtins. Also guarantee
  lflag is set to one by avoiding 'lflag++'.

src/cmd/ksh93/Makefile,
src/cmd/ksh93/Mamfile,
src/cmd/ksh93/sh/main.c,
src/cmd/ksh93/sh/init.c,
src/cmd/ksh93/data/aliases.c:
- Remove the table of predefined aliases because the last few have
  been removed. During init the alias tree is now initialized the
  same way as the function tree.

src/cmd/ksh93/bltins/typeset.c:
- Remove the bugfix for unsetting predefined aliases because it is
  now a no-op. Aliases are no longer able to have the NV_NOFREE
  attribute.

src/cmd/ksh93/tests/alias.sh:
- Remove the regression test for unsetting predefined aliases since
  those no longer exist.

src/cmd/ksh93/data/builtins.c:
- Update sh_opthist[] for 'hist --man', etc.

src/cmd/ksh93/sh.1:
- Remove the list of preset aliases since those no longer exist.
- Document history and r as builtins instead of preset aliases.

Co-authored-by: Martijn Dekker <martijn@inlv.org>
This commit is contained in:
Johnothan King 2020-07-16 10:56:49 -07:00 • committed by GitHub
parent 17f81ebedb
commit 03224ae3af
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13 changed files with 47 additions and 100 deletions
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@ -3,6 +3,11 @@ For full details, see the git log at: https://github.com/ksh93/ksh
Any uppercase BUG_* names are modernish shell bug IDs.
2020-07-16:
- The 'history' and 'r' default aliases have been made regular built-ins,
leaving zero default aliases.
2020-07-15:
- The 'autoload', 'compound', 'float', 'functions', 'integer' and 'nameref'
@ -10,9 +15,6 @@ Any uppercase BUG_* names are modernish shell bug IDs.
that 'unalias -a' does not remove them. Shell functions can now use
these names, which improves compatibility with POSIX shell scripts.
- The two default aliases that are left, 'history' and 'r', are now only
loaded on interactive shells, leaving zero default aliases for scripts.
- The End key escape sequence '^[[F' is now handled in the emacs and vi editing
modes. The End key moves the cursor to the end of the line (in contrast to
the Home key doing the opposite).