Implement the HISTFILE and HISTAPPEND variables.

See the (newly updated) sh(1) for details.
Also add the -z option to fc (clear history).

None of this exists in SMALL shells.

The great shell trailing whitespace cleanup of 2023...
Inspired by private e-mail comments from mouse@

NFCI.

Avoid generating error messages implying that user errors are illegal.

Remove atoi()

Mostly use number() (no longer implemented using atoi()) when an
unsigned integer is required, but use strtoXXX() when a conversion
is wanted, without the possibility or error (like se

Remove atoi()

Mostly use number() (no longer implemented using atoi()) when an
unsigned integer is required, but use strtoXXX() when a conversion
is wanted, without the possibility or error (like setting OPTIND
and RANDOM). Always init OPTIND to 1 when sh starts (overriding
anything in environ.)

show more ...

Add const.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22249, verified by myself.

Fixes from David Laight:
- ansification
- format of output of jobs command (etc)
- job identiers %+, %- etc
- $? and $(...)
- correct quoting of output of set, export -p and readonly -p
- differentia

Fixes from David Laight:
- ansification
- format of output of jobs command (etc)
- job identiers %+, %- etc
- $? and $(...)
- correct quoting of output of set, export -p and readonly -p
- differentiation between nornal and 'posix special' builtins
- correct behaviour (posix) for errors on builtins and special builtins
- builtin printf and kill
- set -o debug (if compiled with DEBUG)
- cd src obj (as ksh - too useful to do without)
- unset -e name, remove non-readonly variable from export list.
(so I could unset -e PS1 before running the test shell...)

show more ...

compile with WARNS = 2

Fix compiler warnings.

kill 'register'

PR/2808: Kill use of error2() (from FreeBSD)

Merge in my changes from vangogh, and fix the x=`false`; echo $? == 0
bug.

convert to new RCS id conventions.

Add RCS ids.

Include appropriate header files to bring function prototypes into scope.

sync with 4.4lite

Remove private versions of strchr() & bcopy(); there is nothing wrong with
the versions in our C library.

Add RCS identifiers.

changed "Id" to "Header" for rcsids

added rcs ids to all files

initial import of 386bsd-0.1 sources