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

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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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 47 additions and 100 deletions

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@ -55,13 +55,10 @@ extern const Shtable_t shtab_testops[];
extern const Shtable_t shtab_options[];
extern const Shtable_t shtab_attributes[];
extern const struct shtable2 shtab_variables[];
extern const struct shtable2 shtab_aliases[];
extern const struct shtable2 shtab_noaliases[];
extern const struct shtable2 shtab_signals[];
extern const struct shtable3 shtab_builtins[];
extern const Shtable_t shtab_reserved[];
extern const Shtable_t *sh_locate(const char*, const Shtable_t*, int);
extern int sh_lookopt(const char*, int*);
extern Dt_t *sh_inittree(Shell_t*, const struct shtable2*);
#endif /* SH_TABLE_H */