ksh: escape control chars when displaying file name completions.
If there are multiple matches when using autocomplete, the list of
matching file names was output as-is. However, for a single match,
control characters are escaped before the file name is displayed.
This makes the behavior more consistent by escaping control chars
in the list of matches too. Discussed with deraadt@, OK op@

Add support for set -o pipefail

With the pipefail option set, the exit status of a pipeline is 0 if all
commands succeed, or the return status of the rightmost command that
fails. This can help stronger error checking, but is not a silver
bullet. For example, commands will exhibit a non-zero exit status if
they're killed by a SIGPIPE when writing to a pipe. Yet pipefail was
considered useful enough to be included in the next POSIX standard.

This implementation remembers the value of the pipefail option when
a pipeline is started, as described as option 1) in

https://www.austingroupbugs.net/view.php?id=789#c4102

Requested by ajacoutot@, ok millert@

When evaluating an arithmetical expression, for example inside $(()),
never do substitution (neither parameter, nor command, nor arithmetic,
nor tilde substitution) on the values of any variables encountered
inside the expression, but do recursively perform arithmetical
evaluation of subexpressions as required. This makes behaviour
more consistent, without hindering any behaviour promised in the
manual page.

A quirk originally reported by Andy Chu <andychup at gmail dot com>
was that in the past, when encountering an array index, the shell
would not only do evaluation, but also substitution on the array
index, even though substitution would not be done on the expression
in general.

tobias@ contributed to initial efforts of understanding the quirk.
patch tested in a bulk build by naddy@
"please commit" deraadt@

Fix the case where the recursion detection isn't reset when the command is
interrupted.

Lots of back and forth with anton@
OK jca@, tb@, anton@

remove the alias type='whence -v' and replace it with
a buildin command, that just calls into c_whence().
This makes type look like the buildin in other shells and makes
things like system("'type' 'git'"); work.

With lots of suggestions and feedback from anton@, kn@ and jca@.
ok kn@ jca@

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly

patches from pdksh 5.2.13.11

Updates from pdksh-unstable-5.2.13.7. Most notable change is:
trap: exit traps now executed in subshells (without explicit exit call).
See the Changelog for a full list of changes.

bug fixes from pdksh-unstable-5.2.13.5; some of which we already had.

pdksh-5.2.13 + local changes

Add FSH (set -o sh), initialize it if we're /bin/sh, and add the first use:
don't set $_ if we're non-interactive.

Up limit of available user file descriptors (e.g. for redirections) to 32

Integrate pdksh 5.2.9.

update to pdksh-5.2.8

branches: 1.1.1;
Initial revision

Add support for set -o pipefail

With the pipefail option set, the exit status of a pipeline is 0 if all
commands succeed, or the return status of the rightmost command that
fails. This can help stronger error checking, but is not a silver
bullet. For example, commands will exhibit a non-zero exit status if
they're killed by a SIGPIPE when writing to a pipe. Yet pipefail was
considered useful enough to be included in the next POSIX standard.

This implementation remembers the value of the pipefail option when
a pipeline is started, as described as option 1) in

https://www.austingroupbugs.net/view.php?id=789#c4102

Requested by ajacoutot@, ok millert@

When evaluating an arithmetical expression, for example inside $(()),
never do substitution (neither parameter, nor command, nor arithmetic,
nor tilde substitution) on the values of any variables encountered
inside the expression, but do recursively perform arithmetical
evaluation of subexpressions as required. This makes behaviour
more consistent, without hindering any behaviour promised in the
manual page.

A quirk originally reported by Andy Chu <andychup at gmail dot com>
was that in the past, when encountering an array index, the shell
would not only do evaluation, but also substitution on the array
index, even though substitution would not be done on the expression
in general.

tobias@ contributed to initial efforts of understanding the quirk.
patch tested in a bulk build by naddy@
"please commit" deraadt@

Fix the case where the recursion detection isn't reset when the command is
interrupted.

Lots of back and forth with anton@
OK jca@, tb@, anton@

remove the alias type='whence -v' and replace it with
a buildin command, that just calls into c_whence().
This makes type look like the buildin in other shells and makes
things like system("'type' 'git'"); work.

With lots of suggestions and feedback from anton@, kn@ and jca@.
ok kn@ jca@

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly

patches from pdksh 5.2.13.11

Updates from pdksh-unstable-5.2.13.7. Most notable change is:
trap: exit traps now executed in subshells (without explicit exit call).
See the Changelog for a full list of changes.

bug fixes from pdksh-unstable-5.2.13.5; some of which we already had.

pdksh-5.2.13 + local changes

Add FSH (set -o sh), initialize it if we're /bin/sh, and add the first use:
don't set $_ if we're non-interactive.

Up limit of available user file descriptors (e.g. for redirections) to 32

Integrate pdksh 5.2.9.

update to pdksh-5.2.8

branches: 1.1.1;
Initial revision

When evaluating an arithmetical expression, for example inside $(()),
never do substitution (neither parameter, nor command, nor arithmetic,
nor tilde substitution) on the values of any variables encountered
inside the expression, but do recursively perform arithmetical
evaluation of subexpressions as required. This makes behaviour
more consistent, without hindering any behaviour promised in the
manual page.

A quirk originally reported by Andy Chu <andychup at gmail dot com>
was that in the past, when encountering an array index, the shell
would not only do evaluation, but also substitution on the array
index, even though substitution would not be done on the expression
in general.

tobias@ contributed to initial efforts of understanding the quirk.
patch tested in a bulk build by naddy@
"please commit" deraadt@

Fix the case where the recursion detection isn't reset when the command is
interrupted.

Lots of back and forth with anton@
OK jca@, tb@, anton@

remove the alias type='whence -v' and replace it with
a buildin command, that just calls into c_whence().
This makes type look like the buildin in other shells and makes
things like system("'type' 'git'"); work.

With lots of suggestions and feedback from anton@, kn@ and jca@.
ok kn@ jca@

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly

patches from pdksh 5.2.13.11

Updates from pdksh-unstable-5.2.13.7. Most notable change is:
trap: exit traps now executed in subshells (without explicit exit call).
See the Changelog for a full list of changes.

bug fixes from pdksh-unstable-5.2.13.5; some of which we already had.

pdksh-5.2.13 + local changes

Add FSH (set -o sh), initialize it if we're /bin/sh, and add the first use:
don't set $_ if we're non-interactive.

Up limit of available user file descriptors (e.g. for redirections) to 32

Integrate pdksh 5.2.9.

update to pdksh-5.2.8

branches: 1.1.1;
Initial revision

Fix the case where the recursion detection isn't reset when the command is
interrupted.

Lots of back and forth with anton@
OK jca@, tb@, anton@

remove the alias type='whence -v' and replace it with
a buildin command, that just calls into c_whence().
This makes type look like the buildin in other shells and makes
things like system("'type' 'git'"); work.

With lots of suggestions and feedback from anton@, kn@ and jca@.
ok kn@ jca@

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly

patches from pdksh 5.2.13.11

Updates from pdksh-unstable-5.2.13.7. Most notable change is:
trap: exit traps now executed in subshells (without explicit exit call).
See the Changelog for a full list of changes.

bug fixes from pdksh-unstable-5.2.13.5; some of which we already had.

pdksh-5.2.13 + local changes

Add FSH (set -o sh), initialize it if we're /bin/sh, and add the first use:
don't set $_ if we're non-interactive.

Up limit of available user file descriptors (e.g. for redirections) to 32

Integrate pdksh 5.2.9.

update to pdksh-5.2.8

branches: 1.1.1;
Initial revision

remove the alias type='whence -v' and replace it with
a buildin command, that just calls into c_whence().
This makes type look like the buildin in other shells and makes
things like system("'type' 'git'"); work.

With lots of suggestions and feedback from anton@, kn@ and jca@.
ok kn@ jca@

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly

patches from pdksh 5.2.13.11

Updates from pdksh-unstable-5.2.13.7. Most notable change is:
trap: exit traps now executed in subshells (without explicit exit call).
See the Changelog for a full list of changes.

bug fixes from pdksh-unstable-5.2.13.5; some of which we already had.

pdksh-5.2.13 + local changes

Add FSH (set -o sh), initialize it if we're /bin/sh, and add the first use:
don't set $_ if we're non-interactive.

Up limit of available user file descriptors (e.g. for redirections) to 32

Integrate pdksh 5.2.9.

update to pdksh-5.2.8

branches: 1.1.1;
Initial revision

Support 64 bit integers on 32 bit architectures.

No binary change on amd64 and there should be no differences on any
other 64 bit architecture either (because long = int64_t).

ok cheloha, tb

Introduce internal_warningf() and mark internal_errorf() as noreturn

This helps tools like scan-build, and follows the example of warningf()
and errorf(). ok anton@

Stop pretending we support building ksh without EDIT/HISTORY support

ok anton@

unifdef BRACE_EXPAND; ok jca@

Bring back the sign compare changes, this time with a fix from otto@
that fixes the issues seen on hppa. OK deraadt@ otto@

unifdef JOBS support

Prompted by a mail from Klemens Nanni, who also had the same diff.
ok deraadt@ millert@

Add -Wshadow to Makefile and fix the resulting warnings. Many of
the warnings are due to the use of globals with generic names,
specifically "options" and "path". I've renamed "options" to
"sh_options" since it holds the shell options and "path" to
"search_path". OK jca@ tb@

Delete the deprecated emacs-usemeta option.

ok tb@ anton@

Use PATH_MAX instead of a local define

okk deraadt@ millert@ anton@

Implement HISTCONTROL ignoredups & ignorespace features

ignoredups: don't save the current line if it is identical to the last
history line.
ignorespace: don't save the current line if it starts with a space

ok anton@ millert@

Stop exposing the emacs-usemeta option, and warn when trying to set it.

Unused since 2012, to be removed after 6.2. Input from anton@,
ok anton@ millert@

Backout previous due to a bug discovered by zhuk@ that requires some tinkering
and is not an easy fix for now.

Add support for pattern substitution to variables in ksh using a common syntax
borrowed from ksh93.

Survived a ports build performed by naddy@ and encouraged by many.

Increase the input line buffer to 4096 bytes.

Sounds good to deraadt@
OK anton@

Add KSH_IGNORE_RDONLY flag and use it in var.c instead of the 0x4
magic number.

remove CSRG BSD-licensed mknod builtin code which was previously used to
accelerate install/upgrade time MAKEDEV runs. That allows ramdisk ksh
to be pledged, without needing "dpath". We'll solve the performance issues
a different way (soon).
ok otto espie natano tb tobiasu rpe

rename global "e" to genv to avoid accidental shadowing and aliasing.
ok millert nicm tb

Move system headers from sh.h to those files that actually need them.

ok mmcc@ a while ago

remove unused prototype

ok mmcc@

Use isdigit() instead of ksh's homebrewed alternative.

ok nicm@. Also discussed with millert@ and guenther@.

Make it clearer that warningf()'s first argument determines whether the
lineno is printed.

ok nicm@

Add uses of areallocarray(). mksh and Bitrig ksh already have similar
functions. With help from Theo Buehler.

ok nicm@

Remove two comments listing functionless files. Trivial, no functional
change.

proto.h contains many function prototypes. It's apparently separate from
sh.h because the pdksh devs used a prototype generator (last run in
1992). Merging it into sh.h makes things clearer.

ok nicm@

Final removal of EXTERN.

ok nicm@

Penultimate commit to remove EXTERN.

ok nicm@

Remove the define NOT, replace it with '!'. No binary change.

"The ^ is used in regular expressions and many versions of fnmatch(3)
accept both ! and ^. However, we are never going to accept ^ instead of
! so I think this makes sense" -millert@

"go for it" -nicm@

A little style(9) for sh.h includes

ok nicm@

Move stddef.h include from sh.h to the file that uses it.

ok nicm@

Move string.h include from sh.h to the files that use it.

ok nicm@

Move limits.h include from sh.h to the files that actually need it. No
binary change.

ok nicm@

More removal of EXTERN.

ok nicm@

Move more EXTERN-defined globals from sh.h.

ok nicm@

Drop two useless defines.

ok nicm@

Move a system header include from the global header (sh.h) into the
files that need it. No binary change.

"This looks fine" -nicm@

Replace Tflag typedef with just int; ok tedu

Apply the ancient art of tedu to ksh_limval.h. ok guenther

Replace newline and space defines by "\n" and " " directly, from Michael
McConville. ok millert

Remove INT32 define and just use int, from Martijn van Duren and Michael
McConville. ok deraadt

Remove artificial limit on the max array index.
Adapted from a bitrig commit from Martin Natano.
OK zhuk@

remove trailing whitespaces; use tabs instead of spaces where appropriate;
no binary changes.

fake a sigwinch after each job, so if the terminal changes size,
we'll notice and update

Crank max array size in ksh to 10K-1, since 2047 is too restrictive.
Please keep in mind that ksh accesses are not O(1) in any sense.
Needed by todd, ok otto, guenther

remove unused variables and functions

Bump max array size. Needed for upcoming MAKEDEV speedup. ok deraadt@

spacing

Set \u in prompt expansion to the right value, while avoiding getpw* calls,
which might be very inconvenient when the yp server is not available.

ok deraadt@ millert@

Use stdbool.h instead of rolling our own bools.

Use _PATH_BSHELL instead of hardcoding "/bin/sh"

Flags set in signal handlers should be volatile sig_atomic_t

Use the BSD sig_t instead of homegrown handler_t
Remove KSH_SA_FLAGS

Get rid of #ifdef KSH since we don't care about building a V7 style sh and
the #ifdef KSH code is required to make a POSIX sh. From Matthias Kilian

Remove unused OS dependent #ifdef blocks, #defines and macro abstraction.
First step in making the ksh code easier to read. From Matthias Kilian

csh-style ! history completion, which can be activated by using
set -o csh-history (off by default)
this is not feature complete, and likely never will be. no ^
and ! has some oddities ... ksh's internal history stuff has got
some very odd behaviours that are rather nasty
ok various developers

Remove redundant errno declaration. ok deraadt@

double the command line buffer size (1024 -> 2048); ok millert deraadt

forget about 16 bit machines; millert ok

typos from Jared Yanovich;
ok deraadt@

In emacs editing mode, ksh by default interprets a set 8th bit as
meta prefix, i.e. all characters with the top bit set (>= 0x80) are
taken as commands and cannot be entered literally.

Introduce a new shell option, emacs-usemeta, that allows to toggle
this behavior. The default is the traditional behavior; to enter
8-bit characters use "set +o emacs-usemeta".

ok fgsch@, henning@

fix several constant overflows, remove the strerror prototype (shouldn't be
there), and cleanup some whitespace; help from, and okay millert@

int -> uid_t

ok millert

this is needed too

o Set default line edit mode to emacs (VISUAL/EDITOR or user can override)
o Spell environment correctly