PR bin/58687 -- implement suspend as a builtin in sh

Requested by uwe@ in PR bin/58687 without objections from
anyone except me, here is an implementation of a suspend
builtin command for /bin/sh

T

PR bin/58687 -- implement suspend as a builtin in sh

Requested by uwe@ in PR bin/58687 without objections from
anyone except me, here is an implementation of a suspend
builtin command for /bin/sh

The sh.1 man page is updated, naturally, to describe it.

This new builtin does not exist in SMALL shells -- as used
on (some) boot media, etc.

If this turns out not to be useful, it can easily be removed.

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Housekeeping.

Improve some comments, and sort the list of builtins, to make it easier
to find what is there and what isn't (since some have multiple different
command names, sort by the internal fun

Housekeeping.

Improve some comments, and sort the list of builtins, to make it easier
to find what is there and what isn't (since some have multiple different
command names, sort by the internal function name). Still leave the
commented out, could be implemented, but haven't ones, almost to last,
and the almost never indluded debug command absolute last.

NFCI. (No changes should be visible externally).

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Ensure that all of the POSIX standard utilities are correctly
identified with the -u flag (that is, I hope I identified all
the ones that were missing it).

This change is a no-op (NFC) as the -u fla

Ensure that all of the POSIX standard utilities are correctly
identified with the -u flag (that is, I hope I identified all
the ones that were missing it).

This change is a no-op (NFC) as the -u flag does nothing.

Still, just in case we find a use for it one day, and just as a
matter of general principle, we should get this correct.

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Add the "specialvar" built-in command. Discussed (well, mentioned
anway) on tech-userlevel with no adverse response.

This allows the magic of vars like HOSTNAME SECONDS, ToD (etc) to be
restored s

Add the "specialvar" built-in command. Discussed (well, mentioned
anway) on tech-userlevel with no adverse response.

This allows the magic of vars like HOSTNAME SECONDS, ToD (etc) to be
restored should it be lost - perhaps by having a var of the same name
imported from the environment (which needs to remove the magic in case
a set of scripts are using the env to pass data, and the var name chosen
happens to be one of our magic ones).

No change to SMALL shells (or smaller) - none of the magic vars (except
LINENO, which is exempt from all of this) exist in those, hence such a
shell has no need for this command either.

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DEBUG mode shell update (changes nothing for shells which are not
compiled for DEBUG.)

Add debug builtin command, and corresponding -D command line option.
As usual, for DEBUG related stuff, read th

DEBUG mode shell update (changes nothing for shells which are not
compiled for DEBUG.)

Add debug builtin command, and corresponding -D command line option.
As usual, for DEBUG related stuff, read the source for info, that's
all there is about this.

This completes the infrastructure changes for the updated DEBUG TRACE
mechanism, so now converting the rest of the shell's internal tracing
can happen as desired - piecemeal.

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Add fdflags builtin. Discussed with Chet and he has implemented it for
bash too.

Include printf by default even for SMALL builds. It is used e.g. by
dhcpcd and as such required by most ramdisk images. Allow turning it off
again by TINYPROG.

Add support for '%n' being a shorthand for 'fg %n'.

Add new builtin `wordexp' to support wordexp(3).

From FreeBSD.
Provided in PR lib/26123.
Approved by kleink@.

don't include the printf builtin if we are SMALL; saves 10K.

remove \r (agc, are you using MS-DOS?)

Move 4 more files from UCB 4 clause to 3 clause licence.

Thanks to Julio Merino for pointing them out.

Add new builtin 'inputrc' which allows keybindings to be redefined
for the current shell. From Arne H Juul in PR#10097.

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...)

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PR/9847: Geoff C. Wing: Make test(1) a builtin.

NO_HISTORY->SMALL

add type builtin.

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

convert to new RCS id conventions.

ulimit builtin (PR #388)

This public domain code, originally by Doug Gwyn, Doug Kingston, Eric
Gisin, and Michael Rendell was ripped from pdksh 5.0.8 and hacked for
use with ash.

Add RCS ids.

add back in support for building w/o obj dir. also, add NO_HISTORY
define, which (if you invoke mkbuiltins properly) gets you a sh w/o
history of command line editing (for floppy sh).

reintegrate NetBSD's false builtin

temporarily disable printf builtin

sync with 4.4lite