______________________________ original newlib message
This commit adds a prototype for a potential extension
of that tabbed bottom window capability. It introduces
a 'menu' which then provides for users' selections. It
does not actually do anything meaningful and will only
be enabled with the new #define called 'BOT_PICK_YES'.
[ since it's just a proof of concept, no attempt has ]
[ been made to add the usual NLS translation support ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
This commit introduces the 'tab' key which can be used
to highlight individual elements in that bottom 'Ctrl'
window. This can really help when reviewing such data.
[ note, normal ongoing monitoring continues unabated ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
This commit adds support for displaying the namespaces
in top's separate bottom 'Ctrl' window. Along the way,
the plumbing is now in place to extend this capability
to other data (if we don't run out of '^' keystrokes).
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
This patch will just set the stage for the next commit
where we'll be adding the capability to display things
that sometimes may necessitate multiple library items.
In that effort we will be adding several new routines.
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
--------------------------------------------- ( none )
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original commit message
----------------------------------- ( minus git hash )
In the patch referenced below the bottom 'Ctrl' window
was made to remain until it was dismissed by the user.
As such, it required abandoning a 'Cap_nl_clreos' used
when all the terminal rows had not been drawn. Instead
each line had to be cleared individually until the row
reserved for that 'Ctrl' window area had been reached.
Unfortunately, while a 'Cap_nl_clreos' didn't create a
problem for 'batch' mode, a 'Cap_clr_eol' used instead
yielded an unending loop if those rows were limitless.
So, now we will only clear that area when top isn't in
'batch' mode (which should have always been the case).
Reference(s):
. May, 2022 - bottom window made sticky
commit ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ sorry, but under this master branch ]
[ the whole next narrative is frankly ]
[ mostly pure unadulterated bullshit. ]
______________________________ original newlib message
Well darn it, whoever wrote that new library caught me
with my pants down (again?). Shoot, they were not just
down but somehow missing altogether. Here's the story.
Any item from that library supported by dynamic memory
can only be represented in user's stacks exactly once.
Should any string based enumerator be duplicated among
the items array, for any instance beyond the first the
library will return '[ duplicate ENUM ]' for a result.
That's where I lost my pants. While command lines were
given special handling (and never duplicated) I failed
to turn on CGROUPS, SUPGRPS & ENVIRON when testing the
Ctrl-G, Ctrl-U & Ctrl-N keys. If any of those 3 are on
that's when a Ctrl window sees a 'duplicate' notation.
[ and who runs top with such fields displayed anyway ]
In responding to this oops, the internals were changed
quite dramatically & vastly simplified in the process.
More importantly, the 'duplicate' results are no more.
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
To complete the implementation of this new feature, we
must address the problem created by any commands which
offer their own full replacement displays. Should that
'Ctrl' bottom window be active, a return from any such
command leaves that lower portion of a terminal blank.
While we could issue a 'TAGGED_TOSS' macro right after
invoking any of those 4 (currently) affected commands,
it is wrong to make them aware of this 'tagged' stuff.
So, I'll opt for a more generalized solution whereby a
notice regarding a corrupted screen is broadcast. Then
the logic already aware of 'tagging' can deal with it.
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
After making that new bottom window more persistent, I
decided to offer a build choice for somebody who might
prefer to have the rug pulled out from under him while
reviewing window contents should some target task end.
If 'TAGGED_BRIEF' is defined old behavior is restored.
[ it should be noted, however, that when this define ]
[ is active we'll lose any benefit of onetime update ]
[ for the bottom window. just like with the original ]
[ behavior, it is repainted with every update cycle. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
--------------------------------------------- ( none )
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
I grew tired of inadvertently causing a premature exit
from top when all I wanted was to review some process'
environment variables. That 'V' key was just too close
to the 'C' key so the '^V' attempt became one of '^C'.
Well, not any more. Should a user wish to see a task's
environment, it will now require the '^N' combination.
[ it also now places G/U & N/K on a similar diagonal ]
Along the way, lower case Ctrl key combinations on the
help screen were all changed into upper case versions.
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
--------------------------------------------- ( none )
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
After using this new feature for awhile, I encountered
numerous times when that 'Ctrl' window would disappear
as I was studying the contents. This was caused by the
death of the target task but it made me think that the
window could/should persist until dismissed by a user.
Well, now it will persist until that same Ctrl key has
been struck a 2nd time or a different Ctrl key used to
target another process after positioning it on row #1.
So now, instead of that former 'moving target' type of
approach, this window is more of a 'snapshot' in time.
[ even more significant, perhaps, is the fact that a ]
[ Ctrl window will now be drawn exactly 1 time only, ]
[ instead of being repainted after each delay cycle. ]
[ this will remain true no matter how many intervals ]
[ might elapse while its contents were under review. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
This minor addition to that new 'Ctrl' feature is more
important than it seems. It's responsible for alerting
yours truly to the 'LIBPROC_HIDE_KERNEL' bug addressed
in the very next commit. All this while, program names <=== not in this branch, cookie
for some tasks would be mysteriously replaced with the
kernel 'kworker' names. However, customary clutter for
the top process display tended to obscure such a fact.
[ and, of course, to notice the problem in the first ]
[ place required one to have the command line toggle ]
[ 'off' or perhaps to toggle its state 'on' & 'off'. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
--------------------------------------------- ( none )
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
There are times when one might want to see some task's
particular variable width data. However, prior to this
commit, the only way was to first turn on a field then
scroll through it via repeated right arrow keystrokes.
[ this also required that field to be displayed last ]
Needless to say, given the potential length of some of
that variable data this could be extremely cumbersome.
Now with this patch, a Ctrl keystroke combination will
create a separate window at the bottom of the terminal
screen where such variable width data is seen in full.
[ the targeted task is the 1st task displayed, which ]
[ is a convention employed in some existing commands ]
[ the targeted data was determined by these Ctrl key ]
[ combinations: CtrlG = ctrl group; CtrlK = cmdline; ]
[ CtrlU = supplementary groups; plus CtrlV = environ ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ can't implement Ctrl-R with AGNI, it ain't present ]
______________________________ original newlib message
--------------------------------------------- ( none )
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
Now that this 'c' variable initial assignment has been
moved outside the looping code, there is no longer any
need to specifically check for space/comma when 'c' is
not '%'. So, let us eliminate those two lines of code.
[ i promise not to change this algorithm ever again! ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
On occasion, even as the top author, I wonder why that
'x' toggle has stopped working. Of course, it actually
was working but a locate request ('L') or other filter
('O') operation was active and thus temporarily turned
if off. Such behavior is documented in top's man page.
Well, with this patch that 'x' suppression is no more.
[ the original justification, however, remains true. ]
[ but there's really only one character which causes ]
[ any potential trouble & i'm gonna' keep it secret. ]
[ besides, if a display is corrupted, there's always ]
[ that '=' key which restores things back to normal. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
It would appear that openSUSE was the first to release
procps-ng version 4.0.0 (in the tumbleweed distro). As
a result I checked their source rpm and found a couple
of patches I'm porting to newlib for the next release.
This particulate patch, with some changes, is openSUSE
patch 'procps-ng-3.3.10-large_pcpu.patch'. The changes
were strictly cosmetic. They involved whitespace only.
[ it should be noted that the net effect for raising ]
[ the maximum is to produce a '?' in the %CPU field. ]
[ that's because its width is fixed at five columns. ]
[ but at least the '?' won't distort actual results. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
______________________________ original newlib message
It would appear that openSUSE was the first to release
procps-ng version 4.0.0 (in the tumbleweed distro). As
a result I checked their source rpm and found a couple
of patches I'm porting to newlib for the next release.
This particulate commit was a refactor of the openSUSE
patch 'procps-ng-3.3.8-bnc634840.patch'. Unfortunately
their original patch did not have the intended effect.
That was because the amended signal handling logic was
performed well before the command line parameters were
parsed. So the global 'Batch' flag was in its 0 state.
. what follows is the original openSUSE commit message
------------------------------------------------------
Do not setup SIGHUP signal handler if we are in the batch mode
Top enables a signal handler for the SIGHUP signal (loss of terminal). While
this makes sense for top's default interactive mode, it doesn't make any sense
for batch mode. If you run top in nohup just to collect data over time and
disconnect top finishes which is not what one would expect.
------------------------------------------------------
Signed-off-by: Jim Warner <james.warner@comcast.net>
When the globbing update was put into sysctl, you could no longer
simply use the keys because one key could potentially be
multiple paths once the glob expansion occured. Using the path
instead gave a unique output.
Except certain programs, such as salt, expected the output to use
the dotted path "kernel.hostname" and not "kernel/hostname".
We can no longer use the original key, so now for each path:
Copy the path
strip off /proc/
convert all / to .
The sysctl testsuite was also updated to check for a few different
types of conversion failures.
References:
commit 6389deca5bhttps://www.freelists.org/post/procps/some-procpsn4400-fixes,4https://repo.saltproject.io/
Signed-off-by: Craig Small <csmall@dropbear.xyz>
With the commit referenced below a nasty bug affecting
aix parsing was swatted. Beyond the bug, the logic was
enhanced to disallow commas in the format string since
they would otherwise be shown with their field's data.
However, there remained many characters other than ','
that could survive the edits to then be shown adjacent
to the data. Well, with this patch they won't anymore!
[ along the way we will no longer try to forgive the ]
[ use of a double '%%' prefix since that resulted in ]
[ display of one '%' and field code instead of data. ]
Reference(s):
. March, 2022 - restored aix bahavior
commit f0b7fd31db
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ since our'master' branch will suffer the same fate ]
[ this was ported from a patch created for 'newlib'. ]
-------------------------- original newlib commit text
-------------------------- (showing our master commit)
The commit shown below broke the aix behavior that Dr.
Fink recently reported. However, in the proposed patch
the old behavior, showing garbage when '%cpu' was used
with an invalid formatting option, would appear again.
So this patch, based on Werner's patch, goes the extra
distance to prevent that. Along the way we'll disallow
commas in the aix format str to prevent their display.
Reference(s):
https://www.freelists.org/post/procps/Procpsng-400-released-with-newlib,2
. Mar, 2022 - where aix bug was introduced
commit 05187e4f17
Prototyped-by: Dr. Werner Fink <werner@suse.de>
Signed-off-by: Jim Warner <james.warner@comcast.net>
At this point I don't know if the Rc.id ever carried a
value of 'b', 'c', 'd' or 'e' in a public release. But
I do know that those values ought not to be recognized
in any configuration file. Now they won't be for sure.
[ while the absence of this new check didn't produce ]
[ an error message, it would skip the initialization ]
[ of default values plus possible string extensions. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
When the configuration file is first written, there is
just the normal single newline which ends that rcfile.
However, when any existing rcfile was rewritten, there
was one extra newline '\n' character added at the end.
This will happen just once. The file does NOT continue
to grow with the extra blank lines always being added.
Anyway, this patch will put an end to such a practice.
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ the original newlib commit message(s) appear below ]
[ but 'cpu utilization' was not implemented to avoid ]
[ any library modifications and thus version impact! ]
------------------------------------- newlib patch ---
doc: updated with new 'start time' & 'cpu utilization'
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ the original newlib commit message(s) appear below ]
[ but 'cpu utilization' was not implemented to avoid ]
[ any library modifications and thus version impact! ]
--------------------------------- newlib patch #1 ---
top: added fields for 'start time' & 'cpu utilization'
This patch will exploit some new library capabilities.
[ one will raise eyebrows, the other likely will not ]
A new 'STARTED' field was added which shows the time a
process started after system boot. As such the largest
interval represents the most recently started process.
This is the field that will likely be questioned since
it's somewhat counterintuitive. But were we to instead
use TIME_ELAPSED, the value will change with every top
refresh. This will defeat any PUFF macro optimization.
The new '%CUU' field will probably be better received.
It represents the cpu usage over the life of the task.
When a process was showing high %CPU usage, this field
can be used to determine if it's an anomaly or normal.
[ and as with %CPU, %CUU shows a '?' when running in ]
[ a namespace when /proc was mounted with subset=pid ]
---------------------------------- newlib patch #2 ---
top: tweaked the recently introduced 'STARTED' support
When the 'STARTED' field was added, the width was made
the same as the 'TIME+' field. Thus, a full time could
be shown (which then included hundredths of a second).
That kind of granularity is totally unnecessary. After
all, this column is potentially confusing enough since
it is so counterintuitive. So, this commit will reduce
the width of the field with some help from scale_tics.
Henceforth it will not include those ol' centiseconds.
[ along the way let's expand the man document with a ]
[ a remainder about content representation & scaling ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ the original newlib commit message(s) appear below ]
------------------------------------- newlib patch ---
doc: document 'scale_tics' function for Ctrl-E scaling
[ i also tweaked that 'STARTED' narrative just a bit ]
[ since its original wording implied the value could ]
[ change, whereas it's fixed when a task is started. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ the original newlib commit message(s) appear below ]
---------------------------------- newlib patch #1 ---
top: refactor 'scale_tics' function for better scaling
This patch refactors the 'scale_tics' function to more
closely parallel uptime shown on the first line of the
summary area. The old logic has been preserved through
the header file's new #define SCALE_FORMER provision.
However, the former logic was actually a big disaster.
These are some potential problems with that old logic:
1. With respect to our time fields top no longer deals
solely with cpu time. So, the old limits of '68 weeks'
could possibly be insufficient to reflect those times.
2. Given the widths of top's new time fields, the code
never got beyond scaling to hours. For example, with a
ridiculously large span of 19 years, the scaled result
would then be shown as '167832h'. We never reached the
days ('6993d') or even the weeks ('999w') equivalents.
3. Similarly, with that 'TIME+' field and a large tics
value, results would then appear as 'MMMMMM:SS' rather
than the more meaningful 'HH:MM:SS' or days and hours.
So henceforth we will adopt these scaling conventions:
MMM:SS.hh ... minutes:seconds.hundredths
MMM:SS ...... minutes:seconds
HH,MM ....... hours,minutes
D+H ......... days+hours (with 'd' & 'h' suffixes)
D ........... days (with 'd' suffix)
W+D ......... weeks+days (with 'w' & 'd' suffixes)
W ........... weeks (with 'w' suffix)
Note that, unlike our former scaling logic, that 'MMM'
portion won't be allowed to grow unconditionally. It's
limited (arbitrarily?) to 360 total minutes (6 hours).
Additionally, the 'HH' guy will be limited to 96 hours
(4 days) while that 'D' limit was set at 14 (2 weeks).
Whenever a limit is hit, scaling will advance a level.
---------------------------------- newlib patch #2 ---
top: extended 'scale_tics' function for Ctrl-E scaling
That normalization of the 'scale_tics' function in the
prior commit convinced me that I won't please everyone
with my arbitrary choices for the scaling transitions.
So, this patch will provide the users with a means for
setting their own scaling transition points with a new
toggle. Ctrl-E was chosen since the 'e/E' toggles were
already present as a means of scaling (albeit memory).
[ this toggle will also serve an educational purpose ]
[ by allowing one to see all the scaling conventions ]
The scaling a user establishes is saved in the rcfile.
---------------------------------- newlib patch #3 ---
top: enhanced 'scale_tics' function for Ctrl-E scaling
When scale_tics was refactored and then Ctrl-E support
added to top, the complete range of scaling values was
not visible. Namely, a single 'd' (days) & 'w' (weeks)
was never seen with ^E. With this commit they will be.
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ the original newlib commit message(s) appear below ]
----------------------------------------- newlib patch
ps: swat insidious bug with the %cpu' format specifier
Whoa, my head really hurts but this commit should help
with a speedy recovery hopefully, after it is applied.
If the '%cpu' field is used as a format specifier with
that 'o' option, you will encounter a SIGSEGV if there
is also an invalid argument on that same command line.
For example, try 'ps/pscommand -o %cpu,x' with newlib.
With any format specifier other than the '%cpu', there
is an error message, as would happen with '-o pcpu,x'.
For a 3.3.17 version of ps, there's no abend. Instead,
the program will just display a bunch of gobbledygook.
This boo-boo was found to exist as far back as v3.3.0.
[ ok, i am starting to feel very much better already ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
This patch was prompted by the merge request for pgrep
referenced below. In top's case, any performance gains
will be minimal since the now defunct strncpy was only
employed for termcap rebuilds after interacting with a
user (+ 1 other non-termcap related user interaction).
[ golly, strncpy always calls at least two functions ]
[ but usually calls a total of 3. on the other hand, ]
[ memccpy will only call a maximum of two functions. ]
And thanks to Baruch Siach for these strncpy insights.
Reference(s):
https://gitlab.com/procps-ng/procps/-/merge_requests/148
Signed-off-by: Jim Warner <james.warner@comcast.net>
This patch eliminates those warnings referenced below.
[ the last error shown needed a little extra cleanup ]
[ for when that '#define SCROLLVAR_NO' is activated. ]
Reference(s):
top.c: In function 'adj_geometry':
top.c:1976:20: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
1976 | if (Screen_cols < DOUBLE_limit) Curwin->rc.double_up = 0;
| ^
top.c: In function 'zap_fieldstab':
top.c:2436:26: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
2436 | if (wtab[EU_CPN].wmin < digits) {
| ^
top.c:2442:26: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
2442 | if (wtab[EU_NMA].wmin < digits) {
| ^
top.c: In function 'keys_summary':
top.c:5382:45: warning: comparison of integer expressions of different signedness: 'int' and 'long unsigned int' [-Wsign-compare]
5382 | if (w->rc.double_up && Screen_cols < DOUBLE_limit) {
| ^
top.c: In function 'task_show':
top.c:6306:13: error: expected ';' before 'else'
6306 | else
| ^~~~
Signed-off-by: Jim Warner <james.warner@comcast.net>
The 'iokey' function's parameter 'action' was utilized
with literal numbers in the calling functions. So this
change will replace those literal numbers with #define
constants which, one hopes, will clarify their impact.
Signed-off-by: Jim Warner <james.warner@comcast.net>
This patch began as just an attempt to make any option
which also included an argument a little more readable
by adding one space before the '=ARGUMENT' convention.
[ by the way, i don't agree with most of those other ]
[ procps-ng programs that use an '<arg>' convention. ]
[ it's too easily misread as an 'optional' argument. ]
[ top uses a convention like that found in coreutils ]
[ albeit now with one extra space before the equals. ]
In adjusting those arguments it was apparent that many
explanations already lined up nicely at the right hand
margin. So, this commit will force right-justification
with all explanations (as we do with commit messages).
[ and as a final challenge, for those options taking ]
[ an argument, that argument was repeated within the ]
[ explanation and made the rightmost item on a line. ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
When in forest view mode, that focus toggle ('F') is a
useful tool occasionally. But, if a focused parent has
enough cloned siblings to exceed screen rows, it could
be hard to remember that such a toggle remains active.
So, this patch will provide a subtle visual clue added
to the leftmost position in the COMMAND column. Now if
the focus toggle was active, regardless of total tasks
affected, the users will always know when it's active.
Reference(s):
. 07/28/21, introduced new focus toggle ('F')
commit bdd50fa2fc
. 09/23/21, ensure focused tasks stay focused
commit d7e6c27a79
Signed-off-by: Jim Warner <james.warner@comcast.net>
[ you wouldn't believe how many back-and-forths were ]
[ involved in Craig convincing me there were several ]
[ inconsistencies. i am so dense sometimes (often?). ]
Reference(s):
. 01/2022, newlib branch equivalent commits
commit 91ffe81734
commit c83cd6e6c0
Signed-off-by: Jim Warner <james.warner@comcast.net>
Over the years the summary_show function has increased
from around 77 lines of code & comments to its current
size of 195 lines. This is well beyond an ideal length
of available screen rows. So this patch will split it.
We'll take the cpu and memory duties and make separate
functions out of them. Of course, this will incur some
additional call overhead but, given current cpu/memory
logic, any such increase really becomes insignificant.
Now summary_show's a svelte 31 lines of code/comments.
[ this is like what was done to that do_key function ]
[ a decade ago except overhead of new function calls ]
[ plus table lookup was even less of a concern since ]
[ a human was involved, not normal iterative output. ]
Reference(s):
. 01/03/22, newlib branch equivalent commit
commit cbff1d;d10645cb8c7fc55dda08b06fbafed05932
Signed-off-by: Jim Warner <james.warner@comcast.net>
In the patch referenced below the focus task logic was
improved to ensure that newly cloned tasks 'above' the
focused task did not force an effect like the up arrow
key. That commit also acknowledged that when some task
'above' ended, it *would* act like the down arrow key.
Well, with this commit a task ending 'above' a focused
task no longer distorts the focus. That's assuming the
new '#define FOCUS_HARD_Y' is specified plus the total
focused tasks does not exceed the current screen rows.
Thus, the manual scrolling with up and down arrow keys
is allowed when the total focused exceeds screen rows.
[ but keep in mind that when a focused task has been ]
[ hardened some otherwise useful toggles will not be ]
[ available. keystrokes like 'v' and even 'F' itself ]
[ can not be applied to another task with no scroll. ]
Reference(s):
. 01/03/22, newlib branch equivalent commit
commit 0e744d3656
. 09/24/21, master branch 'focus' logic improved
commit d7e6c27a79
Signed-off-by: Jim Warner <james.warner@comcast.net>
This just updates the copyright dates in the documents
within the top subdirectory only. Others are unchanged.
Reference(s):
. 01/01/22, newlib branch equivalent commit
commit afdd4690fc
Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is an example of what can happen when this
author is waiting around for the release of our newlib
& otherwise runs out of legitimate changes to be made.
[ on the other hand, such changes surely make us run ]
[ quite a bit more efficiently, if i am not mistaken ]
Reference(s):
. 09/14/21, newlib branch equivalent commit
commit 6049c13b4d
Signed-off-by: Jim Warner <james.warner@comcast.net>
While experimenting with a new feature, wherein select
fields display the total upon request, the capacity of
the 'num' passed to some 'scale' guys became an issue.
So this commit will, with the compiler's help, put the
responsibility for converting the integer into a float
within the calling code (instead of the called logic).
Reference(s):
. 03/08/21, newlib branch equivalent commit
commit 62928cf461
Signed-off-by: Jim Warner <james.warner@comcast.net>
The Inspection feature already offered an INSP_SLIDE_1
provision. This patch now offers similar extensions to
variable width column scrolling (assuming SCROLLVAR_NO
isn't defined). Such a provision was useful during the
development of some recent library UTF-8 enhancements.
Reference(s):
. 12/30/20, newlib branch equivalent commit
commit edce9ed612
Signed-off-by: Jim Warner <james.warner@comcast.net>
