Gilles Espinasse [Thu, 23 May 2013 21:22:49 +0000 (23:22 +0200)]
procps-ng : tests, remove which dependency
which is a separate package that may not be available and is not yet build on Linux from scratch build order.
Instead use posix command -v. command -v is a builtin working with bash-4.2, 3.0.25 or even old bash-2.05 or current debian dash
Gilles Espinasse [Sat, 25 May 2013 21:25:55 +0000 (07:25 +1000)]
skip kill test too if running runtest
I find more readable instead of make check to run
cd testsuite && make site.exp && DEJAGNU=global-conf.exp runtest
But in that case, kill.exp was still trying to run with
ERROR: tcl error sourcing ./kill.test/kill.exp.
ERROR: couldn't execute "/usr/src/procps-ng-3.3.7/kill": no such file or
directory
...
Jim Warner [Wed, 22 May 2013 05:00:00 +0000 (00:00 -0500)]
top: change man document license used from GFDL to GPL
This patch brings the man document into agreement with
Debian's current licensing standards. The 3 urls below
discuss their concerns over the GFDL and also document
quite a few additional packages with similar licenses.
( jeeze, 12+ friggin' years & finally someone grep'd )
( for what was just a couple of 'invariant' sections )
Reference(s):
. why gfdl is unsuitable
http://www.debian.org/vote/2006/vote_001
. draft position statement
http://people.debian.org/~srivasta/Position_Statement.xhtml
. busted by lintian
http://lintian.debian.org/tags/license-problem-gfdl-invariants.html
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sat, 18 May 2013 05:00:00 +0000 (00:00 -0500)]
top: inoculated against a window manager like 'screen'
If top were invoked under the 'screen' window manager,
writing the terminfo string 'exit_ca_mode' at top exit
would not restore the display to the state existing at
the time top was started. That's what occurs normally.
The net result of that failure was a corrupted screen.
However, there is a 'screen' configuration option that
will produce proper 'rmcup' behavior, but it is off by
default. That screencr option is known as 'altscreen'.
I stumbled across this provision by cloning the screen
git repository then searching for references to 'cup'.
If 'altscreen on' had been in either the /etc/screenrc
or the $HOME/.screenrc configuration file, my poor old
top would never have been accused of such corruptions.
Of course, the Programming Gods decree that any simple
solution for our problem must always be revealed last.
So before discovering that rc option, another approach
was taken involving top only. With just a little extra
refactoring of top display logic he was made immune to
any such quirk in the implementation of 'smcup/rmcup'.
I always feel good about any enhancement that actually
reduces the total number of lines of code. Even though
this change involved mostly rearranging some logic, it
yielded one less line (can't judge by diffstat because
of braces & notes). Anyway, rather than requiring some
change to a screenrc file, now we are self-sufficient.
Reference(s):
procps ---------------------------------------------
https://bugzilla.redhat.com/show_bug.cgi?id=962022
http://www.freelists.org/post/procps/top-procpsng337-no-screen-cleaning-at-exit,3
. top : disable tty scrollback buffer to improve SIGWINCH
commit dedaf6e1a81738ff08ee8e8523871e12f555ad6d
screen ---------------------------------------------
git://git.sv.gnu.org/screen.git
. Improve cursor store/restore on smcup/rmcup.
commit f95352946080be803b794c9f2733d8c809c1a39a
. Fix using alternate screen buffers in some cases.
commit ad56f746c6243d45124485d198d577bdbb78071c
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=558724
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Tue, 14 May 2013 05:00:00 +0000 (00:00 -0500)]
top: provide a build option to change memory precision
When summary & task area memory scaling was introduced
in release 3.3.6, the memory field widths were widened
slightly so unscaled KiB values could be provided more
consistently and scaled values (beyond MiB) could show
3 decimal places of precision. However, some users may
prefer the former widths/precisions for memory fields.
This commit will provide a build time configure option
to return top to those former defaults as a compliment
to a new %CPU & %MEM field precision configure option.
Jim Warner [Tue, 14 May 2013 05:00:00 +0000 (00:00 -0500)]
top: revert %CPU and %MEM precision to former defaults
When summary & task area memory scaling was introduced
in release 3.3.6, the percentage columns were expanded
to provide 3 decimal places of precision. In hindsight
that may have been overkill, making those columns more
of a distraction than useful, with just too much info.
This patch will revert those columns to the former one
decimal place. And as was true, that decimal point may
be sacrificed depending on the number of cpus present.
And, in case anyone might prefer additional precision,
a build option can provide it (--enable-wide-percent).
Jim Warner [Mon, 13 May 2013 05:00:00 +0000 (00:00 -0500)]
top: eliminate troublesome apostrophes in man document
Some versions of man have had trouble with the leading
apostrophe employed with interactive commands/toggles.
Instead, a '?' would be displayed in their place. With
this patch all such conventions have now been removed.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Markus Mayer [Wed, 8 May 2013 23:34:44 +0000 (16:34 -0700)]
Fix btime handling reading from /proc/stat
Function getbtime() currently makes the assumption that btime==0 equals
btime not being present in /proc/stat. This is not quite accurate, as
timestamp 0 is, in fact, also a valid time (Epoch), and /proc/stat may
report it as such.
We introduce a flag to indicate whether btime was found in /proc/stat.
In this way, btime==0 becomes a valid case, provided /proc/stat
actually reports this as the boot time.
procps can still detect the case of btime actually not being reported
by the kernel.
Jim Warner [Sun, 5 May 2013 05:00:00 +0000 (00:00 -0500)]
build-sys: allow a build when libdl.so is truly absent
The earlier commit purporting to allow top to be built
in the absence of that dynamic linking library stopped
just a little short of the truth. So this will fix it.
Craig Small [Sun, 5 May 2013 00:07:30 +0000 (10:07 +1000)]
Updated configure.ac
Been a while since we ran a re-scan over the autotools files. This
change modernises the configure file. Not a great deal of changes
required to bring us up to date, autoscan doesn't understand our
optional things, which is fine.
Jim Warner [Thu, 25 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: introduce a plug-in approach for the NUMA support
The NUMA/Nodes support in top has gone through several
evolutions (primarily dealing with build-sys options).
With this commit the library dependency issues are now
moot and the responsibilities for run-time loading and
dynamic linking are assumed by the top program itself.
Henceforth, if top is executed in an environment where
libnuma.so is present, top will offer such extensions.
Even more importantly, when a missing libnuma is later
installed, top will offer numa support auto-magically.
All NUMA/Node build-sys dependencies are thus removed.
The former NUMA_ENABLED define has become NUMA_DISABLE
should anyone wish to test user interface implications
in an environment that *does* have libnuma. It is also
represented as the ./configure option: --disable-numa.
Lastly, the 't' (View_STATES) toggle will be forced on
for sanity whenever the '1', '2' or '3' keys are used.
Reference(s):
. original idea from: Dr. Fink <werner@suse.de>
http://www.freelists.org/post/procps/top-NUMA-node-CPU-utilization-support,18
. original numa suppoort
commit 8d989c68c068541a814bf0d2340ac9b0373f24b5
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Thu, 25 Apr 2013 05:00:00 +0000 (00:00 -0500)]
build-sys: eliminate dependencies for the NUMA support
Oh that poor ol' build system. With this patch it will
have gone through three separate incarnations in terms
of NUMA/Node support. Those 3 iterations consisted of:
1. A 'porridge too hot' where the top numa support was
enabled if it was built in the presence of libnuma and
the numa.h header. But if the numa library wasn't part
of core packages, that would have broken poor old top.
2. A 'porridge too cold' where numa support was off by
default and must have been explicitly enabled when the
./configure script was run. This could have meant that
distros might not distribute a numa-aware procps, even
though their numa library would have been distributed.
3. And this 'porridge' where the top numa support will
become a 'plug-in' feature activated when the presence
of libnuma.so can be verified at runtime. We'll do our
own loading and symbol resolution (with some help from
dlopen in libdl). Thus maintainers' responsibility for
enabling numa support and then satisfying that library
dependency is now an entirely optional --disable-numa.
As Goldilocks might say about our current configure.ac
"Ummm, I think this porridge tastes just about right".
ps: possibility to display systemd user unit for a process
Library systemd-login offers possibility to display
name of systemd user unit for specific pid. Note that not all
processes are part of a user unit.
This patch adds output option "sd_uunit" which will
show name of user unit or "-", when process does not belong
to any user unit. This is similar to "sd_unit" but applies
to user units instead of system units.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display uid of session owner for a process
Library systemd-login offers possibility to display the Unix
user identifier of the owner of the session of a process.
This information will also be displayed for user processes which
are shared between multiple login sessions of the same user,
where sd_session will be blank.
This patch adds output option "sd_ouid" which will show
user UID or "-", when there is no owner for a process.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display login session for a process
Library systemd-login offers possibility to display name
of login session for specific pid.
Note that not all processes are part of a login session
(e.g. system service processes, user processes that are shared
between multiple sessions of the same user, or kernel threads).
This patch adds output option "sd_session" which will
show name of session or "-", when process does not belong
to any session.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
ps: possibility to display systemd unit for a process
Library systemd-login offers possibility to display
name of a systemd unit file for specific pid. Note that
not all processes are part of a system unit/service
(e.g. user processes, or kernel threads).
This patch adds output option "sd_unit" which will
show name of systemd unit or "-", when process does not
belong to any unit.
To maintain compatibility with non-systemd systems,
procps must be configured with --with-systemd option
to enable this option.
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
library: dynamic buffer management even more efficient
One recent patch to dynamic buffer management involved
over-allocating the buffer increase to lessen calls to
xrealloc. That was successful, but the actual increase
amount did not attempt to optimize size or alignments.
With this commit, we'll copy an approach recently used
by the top program and round up buffer sizes to 1 KiB.
More importantly, while buffers are quickly reaching a
KiB optimum multiple, no memcpy will ever be employed!
To illustrate just how effective top's algorithm would
be, just change the initial and subsequent allocations
from the current 1024 bytes to just a single byte then
add an fprintf. Those one byte reallocations while on
the way to optimum buffer size will be a one-time cost
and won't represent any recurring performance penalty.
( gosh, that top program *must be* one fart smeller, )
( or was that a smart feller, i can't remember which )
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: snapshot /proc/stat reads to minimize distortions
Almost forever, top has been accessing the /proc/stat/
directory one line at a time until either smp_num_cpus
was reached or (more recently) Screen_rows is reached.
When NUMA/Nodes support is enabled screen rows will no
longer serve as a limit because all cpus must be read.
With this commit, the entire /proc/stat/ directory can
be read at once so all statistics will be frozen. Thus
individual cpus will no longer keep "ticing" until top
gets around to accessing them via some separate fgets.
The distortion this commit eliminates was quite easily
seen when comparing old/new tops using: individual cpu
stats vs. cpu summary; a healthy delay interval of 3-5
seconds; manually synchronized update cycles (the hard
part); some system loading (maybe another top at -d0).
Additionally, this patch eliminates some long standing
unnecessary initialization made possible because of an
allocation via calloc. If some parts are never touched
by sscanf due to a kernel version, it's unnecessary to
repeatedly re-initialize those portions to zero again.
Jim Warner [Sun, 14 Apr 2013 05:00:00 +0000 (00:00 -0500)]
top: change number of emulated cpus from four to eight
With the addition of NUMA/Node support and the ability
to emulate such support even in the absence of libnuma
and numa.h, the maximum number of cpus top can emulate
was increased to make numa emulation more interesting.
( whew, that's an awful lot of "emulates", me thinks )
top: program code changes, enable NUMA/Node extensions
This commit extends the top Summary Area cpu states to
include information on Non-Uniform Memory Architecture
nodes. It is based upon changes originally proposed by
Lance Shelton who was instrumental in the final patch.
With this change, the user will have new commands that
will provide alternatives to the individual cpu stats:
. '2' toggles between cpu & numa node summary displays
. '3' provides node summary and related cpu statistics
These extensions required some minimal system support.
Typically, the numactl package (and maybe libnuma-dev)
are all that's needed to show a single node which owns
all the processors. Failing that, or for slightly more
variety, top also offers a #define named PRETEND_NUMA.
(everything is perfectly justified plus right margins)
(are completely filled, but of course it must be luck)
Signed-off-by: Jim Warner <james.warner@comcast.net> Signed-off-by: Lance Shelton <LShelton@fusionio.com>
Pierre Labastie [Sun, 7 Apr 2013 08:31:26 +0000 (18:31 +1000)]
Improved regexp test for pmap
The change in pmap is necessary if it happens that the whole output of
pmap -X or -XX has been done before the second regexp is matched. Since
the matching is greedy, it is matched by the full output, so that
nothing is left for the third regexp and the test fails with
FAIL: extra extended output (footer).
Jim Warner [Sun, 31 Mar 2013 05:00:00 +0000 (00:00 -0500)]
miscellaneous: clean up trailing whitespace once again
An earlier commit attempted to cleanse our environment
of all useless trailing whitespace. But the effort did
not catch 'empty' lines with a single space before ^J.
This commit hopefully finishes off the earlier effort.
In the meantime, let's pray that contributors' editors
are configured so that such wasted crap is disallowed!
Jim Warner [Sat, 30 Mar 2013 05:00:00 +0000 (00:00 -0500)]
library: avoid SEGV if file2str should read zero bytes
When utility buffers were introduced for file2str read
requests, a subtle change was inadvertently introduced
such that a read of zero no longer returns a -1 value.
This commit ensures that zero bytes read returns a -1.
And although the solution differs from a merge request
submitted by sergey.senozhatsky@gmail.com, a thank you
is offered for revealing this potential abend problem.
Jim Warner [Fri, 29 Mar 2013 05:00:00 +0000 (00:00 -0500)]
library: make dynamic buffer management more efficient
When dynamic buffers were recently introduced for read
of the status, stat and statm subdirectories one extra
call to read() was required for end-of-file detection.
This patch avoids most all such extra calls to read().
Additionally, the frequency of memory reallocations is
reduced by overallocating each increase more than 25%.
Craig Small [Tue, 26 Mar 2013 10:41:55 +0000 (21:41 +1100)]
Update library version-info to 2.1.1
Internal changes to libproc means the revision number
is incremented. This does not mean an ABI or API change has
occured, we just do the stuff under the covers better or in this
case reduce the compile warnings mainly.
Gilles Espinasse [Tue, 26 Mar 2013 10:21:39 +0000 (11:21 +0100)]
procps-ng : fix pmap uninitialized warnings
pmap.c: In function 'one_proc':
pmap.c:529: warning: 'maxw1' may be used uninitialized in this function
pmap.c:529: warning: 'maxw2' may be used uninitialized in this function
pmap.c:529: warning: 'maxw3' may be used uninitialized in this function
pmap.c:529: warning: 'maxw4' may be used uninitialized in this function
pmap.c:529: warning: 'maxw5' may be used uninitialized in this function
Without -d and -x option, that should be doable to trigger the issue but I haven't found how
Gilles Espinasse [Tue, 26 Mar 2013 09:34:22 +0000 (10:34 +0100)]
procps-ng : fix pmap unused variable warnings
pmap.c: In function 'print_extended_maps':
pmap.c:310: warning: unused variable 'value'
pmap.c: In function 'config_read':
pmap.c:792: warning: unused variable 'section'
pmap.c: In function 'get_default_rc_filename':
pmap.c:969: warning: unused variable 'ret'
pmap.c: In function 'main':
pmap.c:999: warning: unused variable 'default_rc_filename'
Gilles Espinasse [Tue, 26 Mar 2013 09:16:43 +0000 (10:16 +0100)]
procps-ng : fix readproc gnu_scanf format warnings
readproc.c: In function 'stat2proc' :
readproc.c:516: warning: use of assignment suppression and length modifier together in gnu_scanf format
readproc.c:516: warning: use of assignment suppression and length modifier together in gnu_scanf format
Jim Warner [Mon, 25 Mar 2013 05:00:00 +0000 (00:00 -0500)]
top: fix the bug affecting certain Find/Locate results
When 'Other Filtering' was introduced the idea of what
constituted a displayed row changed. No longer was any
call to task_show assured of consuming one screen row.
Now the determining factor was whether or not the rows
were empty. This worked Ok until a certain Find string
was active then the entire display could be corrupted.
With Find active, the task_show() function alters each
returned row while highlighting each visible match. If
the search was on a single byte value & matched at the
beginning of a row the match got overwritten with '\0'
which then appears empty upon return to window_show().
So that row would not be counted as having been shown.
This was best illustrated with a Find on a single ' '.
This patch will restore proper 'Find/Locate' behavior.
Jim Warner [Sat, 23 Mar 2013 05:00:00 +0000 (00:00 -0500)]
library: utility buffers now immune to buffer overflow
A recent Debian bug report, dealing with release 3.2.8
and its even more restrictive buffer sizes (1024) used
in stat, statm and status reads via file2str calls, is
a reminder of what could yet happen to procps-ng. Size
needs are determined by kernel evolution and/or config
options so that bug could resurface even though buffer
size is currently 4 times the old procps-3.2.8 limits.
Those sizes were raised from 1024 to 4096 bytes in the
patch submitted by Eric Dumazet, and referenced below.
This patch makes libprocps immune to future changes in
the amount of stuff that is ultimately found in a proc
'stat', 'statm' or 'status' subdirectory. We now trade
the former static buffer of 4096 bytes for dynamically
allocated buffers whose size can be increased by need.
Even though this change is solely an internal one, and
in no way directly affects the API or the ABI, libtool
suggests that the LIBprocps_REVISION be raised. I hope
Craig remembers to do that just before a next release.
We don't want a repeat of the procps-ng-3.3.4 boo-boo,
but with no API/ABI impact that probably can't happen.
p.s. A big thanks to Jaromir Capik <jcapik@redhat.com>
who reviewed my original version and, of course, found
some of my trademark illogic + unnecessary code. After
his coaxing, he helped make this a much better commit.
Jim Warner [Fri, 22 Mar 2013 05:00:00 +0000 (00:00 -0500)]
top: tweak 'Inspect' code for isolated edge situations
If the 'Inspect' feature was used to view a file which
contained binary (unprintable) data, and when the last
line for such a file was purely unprintable, then that
line length would be overstated by the terminal width.
This was also the occasion where valgrind might object
over potential reference to some unitialized value(s).
It was a harmless situation and somewhat rare to begin
with. Anyway this commit will eliminate the potential.
Additionally, supporting readfile logic was simplified
and the 'status line' bytes read is now more accurate.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Tue, 19 Mar 2013 05:00:00 +0000 (00:00 -0500)]
top: touch up a few miscellaneous nls related comments
Some recent nls work on that pmap program necessitated
a return to nls translation file creation for testing.
As it turns out, my skills used in pseudo-translations
had become rusty and some newer LC_MESSAGE directories
may have been introduced since last needing the topic.
This patch just updates some programmer notes to agree
with this most recent effort and for future reference!
Rainer Müller [Wed, 20 Feb 2013 19:10:40 +0000 (20:10 +0100)]
configure: Check for stdio_ext.h
For portability, check for stdio_ext.h during configure and define
HAVE_STDIO_EXT_H accordingly.
If the current system does not provide this header, use a fallback for
__fpending(). This definition will not work on all systems as it relies
on internal data structures of libc. A more portable solution should be
preferred, for example by using gnulib.
Rainer Müller [Wed, 20 Feb 2013 17:31:48 +0000 (18:31 +0100)]
configure: check for program_invocation_name
For portabiliy, check for program_invocation_name during configure and
define HAVE_PROGRAM_INVOCATION_NAME accordingly. Use of this symbol is
now enclosed with the appropriate #ifdef block.
The symbol program_invocation_name is only used for error message
handling using error(), so it's safe to omit this if it is not
available.
Jaromir Capik [Mon, 18 Mar 2013 18:43:12 +0000 (19:43 +0100)]
pmap: fixing the width measurement of extended_pmap with -q
This commit fixes the width measurement of the extended pmap
function to work correctly with the -q switch. With no header
and no footer only widths of the particular values matter.
Jim Warner [Sat, 16 Mar 2013 05:00:00 +0000 (00:00 -0500)]
pmap: a spade is a spade, so let's call a Flags a Perm
For some reason when the new -X/-XX options were added
what was always displayed as 'Mode' became 'Flags'. So
now a precious horizontal space is wasted because that
field's data has only 4 bytes whereas the header is 5.
Moreover, this created a conflict with the top program
which used that name in a column header already. Plus,
top emitted a 'Translation Hint' that suggests the max
chars should be 8 which is a limit pmap needn't share!
The xgettext program provides no way to keep identical
strings separate. This meant both top and pmap will be
sharing not only the msgid but a Translation Hint too.
So, the solution will now be two distinct field names.
Besides the kernel folks document it as 'perm' anyway!
Jim Warner [Sat, 16 Mar 2013 05:00:00 +0000 (00:00 -0500)]
pmap: wield my machete, achieve width-wise nls support
The existing gettext nls support in pmap exposed users
to some potentially ugly misalignments should the text
that's used in headers someday actually be translated.
The length issue had been addressed already for -X/-XX
modes, but the column headers weren't nls translatable
as yet. This commit makes any header (not literally in
/proc/#/smaps) nls aware. It provides translated width
protection to all modes except one that's header-less!
As part of this effort, the occasional two spaces that
preceeded the Mapping column have been reduced to one.
Jim Warner [Sat, 16 Mar 2013 05:00:00 +0000 (00:00 -0500)]
pmap: trade inept width approach for printf's built-in
When the new -X/-XX options were introduced, the width
and justification requirements were satisfied with a 2
step approach. First, format strings would dynamically
be built and then employed in the subsequent printf().
This was a total waste of time and resources since the
printf family of functions provide for the '*' width &
precision conventions to meet this need via arguments.
But even more importantly that foolish endeavor always
hides the potential warnings like the one shown below.
Henceforth this pmap will printf in the proper manner!
Reference(s):
new options for pmap
commit faec340719de6db8f64c468cf1dec84ffdd914a3
pmap.c:459:4: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long unsigned int' [-Wformat]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sat, 16 Mar 2013 05:00:00 +0000 (00:00 -0500)]
pmap: formatting only changes, for minimum consistency
This patch just adjusts miscellaneous indentation etc.
so we can begin the odious task of addressing the pmap
nls needs with at least a consistently formatted base.
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sat, 16 Mar 2013 05:00:00 +0000 (00:00 -0500)]
pmap: restore a proper response when arguments missing
Ever since pmap was refactored via the reference below
(and sprinkled with those damn tabs), the response for
the absence of any argument has been an error message.
This patch restores the proper behavior ('usage' text)
and updates the dejagnu 'no arguments' expect pattern.
Jaromir Capik [Mon, 18 Mar 2013 15:05:44 +0000 (16:05 +0100)]
pmap: New switches - RC support (-n/-N,-c/C) & ShowPath (-p)
This commit introduces 4 new switches for the RC support
and 1 more switch for toggling the path printing
in the mapping field. the configuration file can be used
for a selection of columns to be displayed and for toggling
the path printing in the mapping field.
Jaromir Capik [Thu, 14 Mar 2013 13:31:03 +0000 (14:31 +0100)]
testsuite: increasing the upper limit of permitted values
This commit increases the upper limit of permitted values
in the expect_table_dsc procedure from 999,999 to 99,999,999.
The previous value was insufficient and causing the slabtop test
to fail on build systems where the number of objects exceeds
one milion.
Jim Warner [Mon, 11 Mar 2013 06:00:00 +0000 (00:00 -0600)]
miscellaneous: clean up trailing whitespace throughout
The entire tree's polluted with inappropriate trailing
whitespace. This commit rids our environment of all of
those useless keystrokes. Unfortunately, it sure ain't
a permanent solution and requires every contributor to
instruct their editor(s) to prevent or eliminate them.
Plus it's strongly recommended we all insert something
like what's shown below to our '.gitconfig' file so as
to provide at least some warnings when we try to apply
any patches (git am) that do contain the #@!%& things!
Jim Warner [Fri, 8 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: rename a single Other Filter variable for clarity
There is a member of the osel_s structure called 'flg'
that is used to reflect whether a particular filter is
one of inclusion or exclusion (negation). So by golly,
from now on we'll refer to it as 'inc', and not 'flg'!
Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 8 Mar 2013 05:00:00 +0000 (00:00 -0500)]
top: correct a sightly obsolete nls 'Translation Hint'
When the command line sort override provisions (-o/-O)
were added, the usage text was modified to keep within
an 80 column terminal but the nls hint didn't keep up.
Jim Warner [Wed, 6 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: fine tune (ie. fix) 'other filter' negation logic
Two too many of these '=' (cooks) spoiled top's broth.
There exists an unintentional variation on the classic
error: off-by-one. When a negation symbol is used with
top's new relational 'other filter' provision, one too
many 'matches' are excluded. This happened because top
covered only 2 of the 3 potential strcmp return codes.
When the strings were equal, they were simply dropped.
So this patch will uninvent that particular variation!
(everything is perfectly justified plus right margins)
(are completely filled, but of course it must be luck)
Jim Warner [Tue, 5 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: introduce relational operators with other filters
When I originally entertained thoughts of maybe adding
relational operators to the new 'Other Filter' feature
the programming challenges seemed just too great. Yet,
when Jaromir suggests its desirability it now suddenly
becomes a reality. Another of life's little mysteries!
At any rate what was already an extremely powerful new
feature is even better by several orders of magnitude!
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Jim Warner [Sun, 3 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: enable other filtering, add documentation support
This commit provides the hard copy support for our new
'Other Filter' feature. The man document contains some
potentially useful examples and it will be interesting
to see what use this new tool is put to in the future.
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Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sun, 3 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: enable other filtering via inclusion or exclusion
This change represents the extension of user filtering
based on inclusion or exclusion. However where 'U'/'u'
filtering provides an either/or choice, this extension
offers multiple choices applicable to multiple fields.
The 'inclusion' and 'exclusion' criteria can be freely
combined making a powerful tool to fine tune a display
and avoid clutter associated with uninteresting tasks.
I'm convinced it offers unimagined future flexibility!
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Jim Warner [Sun, 3 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: minor refactor in preparation for other filtering
While it's only documented (so far) in commit text and
an occasional email I've tried to maintain some coding
standards primarily for reference/navigation purposes.
They also served, I felt, as useful mental challenges.
Someday I will get around to formerly documenting them
but in the meantime here are the ones for this commit:
. functions are grouped into logical (i hope) sections
. functions & sections are ordered to avoid prototypes
. function names are alphabetical within every section
Thus, given those constraints/objectives, and in order
to prepare for an upcoming Other_Filter feature, a few
things had to be renamed and rearranged. Plus a couple
of other (unrelated) tweaks were made for consistency.
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Jim Warner [Fri, 1 Mar 2013 06:00:00 +0000 (00:00 -0600)]
top: finish the job of correcting the response to a ^Z
if top is suspended while on the 2nd level help screen
the <Enter> key is no longer honored. Thus, users must
use <Esc> to exit help and return to the main display.
Also, line input that was only partially complete when
suspended would still require one additional keystroke
before the read was aborted and the display refreshed.
Lastly, some user interactions might require two input
lines before an operation can be considered completed.
Thus the 2nd line offers another opportunity for users
to suspend top. Resumption would require an extra key.
These issues stem from 2 recent enhancements: preserve
the user context when signaled; complete input editing
with cursor movement keys, insert/overtype modes, etc.
With this patch, the <Enter> key is once again honored
on help screen #2 and partial reads are now completed.
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Jim Warner [Thu, 28 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: add the field 'USED' to top's existing repertoire
After revisiting the issue of a new field, combining 2
existing fields (RES and SWAP), I've decided it indeed
makes sense. After all, with the vastly expanded field
capability and the ease of adding new fields, it would
save some precious horizontal screen real estate while
also eliminating some mental/manual user calculations.
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Jim Warner [Wed, 27 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: consolidate logic dealing with resetting a window
This commit just gathers all the logic associated with
resetting/normalizing a single window in one function.
In the future, should the window structure be expanded
to support added functionality, the act of maintaining
it will have been made a little bit easier, hopefully.
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Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Wed, 27 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: make user's choice for insert/overtype persistent
When true line input editing with paste capability was
was re-introduced in the commit below, the concept for
the distinct insert/overtype mode was also introduced.
But such a distinction did not survive an <Enter> key.
With this commit, the cursor state is made persistent.
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Jim Warner [Wed, 27 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: allow no input with the maximum task ('n') prompt
When both 'kill' and 'renice' commands were changed to
provide a default pid, the 'n' command (maximum tasks)
should have also changed to continue to accept just an
<Enter> key under the get_int function's new protocol.
This patch corrects that behavior, accepting no input.
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Jim Warner [Fri, 22 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: allow re-ordering of saved line input upon recall
The original implementation of input line recall keeps
strings in the order established when initially added.
With this commit, that has been changed so any matched
string moves to the top of the saved input line stack.
[ well technically not the top since that's occupied ]
[ by an 'empty' string which serves multiple masters ]
Thus, the most frequently referenced strings over time
will percolate up and remain the most easily recalled.
But just in case anybody prefers the strict historical
ordering, a #define can restore the original behavior.
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Jim Warner [Fri, 22 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: improve the response to ^Z if awaiting line input
Now that line input offers users full editing freedom,
if top were to be suspended after issuing a prompt for
input, upon resumption an extra keystroke is necessary
to satisfy the outstanding read & refresh the display.
With this patch that extra keystroke is not necessary.
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Jim Warner [Fri, 15 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: enable recall of previous input lines for re-edit
With this commit, users can now retrieve previous line
input for re-editing and/or re-input using the Up/Down
arrow keys (or their aliases). This mirrors the 'bash'
or 'less' interface and represents a major enhancement
achieved via a somewhat minor impact to our code base.
[ 33 lines of code, 5 closing braces & some comments ]
[ all in 1 function, when TERMIOS_ONLY isn't defined ]
Currently, the upper limit for such recallable strings
has been set at 50 but that could be easily increased.
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Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Fri, 15 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: enable true line input editing with paste support
This patch changes the TERMIO_PROXY define back to the
former TERMIOS_ONLY thus changing the top default too.
Plus we can now use true line input editing while also
retaining paste capability. That former native termios
support provided only a limited destructive backspace.
Now we exploit the Left/Right arrow keys, Home/End and
Delete. Plus, the Insert key can toggle overtype mode!
[ The stage is now set for a really huge improvement ]
[ to any user input terminated with the <Enter> key. ]
[ So please stay tuned for the next patch to arrive! ]
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Jim Warner [Mon, 11 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: end reliance on strdup not failing & roll our own
Lately, top has begun to rely more and more on dynamic
memory allocations rather than the static buffers that
were found in many of its structures. This was perhaps
most evident in the increasing use of the strdup call.
This commit trades that function call for the internal
equivalent which will protect us from malloc failures.
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Signed-off-by: Jim Warner <james.warner@comcast.net>
Jim Warner [Sat, 9 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: man document now properly reflects delay interval
This commit corrects one reference to 'decimal place'.
Even though a running top supports a delay interval of
unlimited precision, and a delay interval of thousands
of a second in the rcfile, we intentionally imply that
any delay interval is limited to tenths of a sec only.
Later in the man document, in section 7a, one finds an
admission that a user can set any desired delay value.
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Jim Warner [Thu, 7 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: keep cursor hidden after Inspect 'Locate' request
A recent commit, that was intended to normalize cursor
handling, unintentionally exposed the cursor following
an Inspect 'Locate' request. This change will hide the
cursor once again through inst_view_choice's lifetime.
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Jim Warner [Tue, 5 Feb 2013 06:00:00 +0000 (00:00 -0600)]
top: the third time was charmed for end-of-job reports
When top was changed to allow some core dumps, the two
potential end-of-job reports were disabled by mistake.
Later, that was corrected so that those reports always
were allowed, if the respective #defines were enabled.
However, if there was an early exit via a command line
option or an error, those reports should not be shown.
This commit may have gotten it right on our third try!
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Jaromir Capik [Thu, 7 Feb 2013 16:56:55 +0000 (17:56 +0100)]
pmap - removing the column width constraints in the -X/-XX modes
This commit changes the width measurement principle in the -X/-XX
modes so that a width of totals is measured instead of the width
of summands. The value of totals is always higher than the value
of summands. That additionally prevents the totals from having
a wrong indentation.
This commit also removes the minimum column width constraints
hardcoded to 7 characters.
Jaromir Capik [Wed, 6 Feb 2013 22:01:54 +0000 (23:01 +0100)]
pmap: fixing broken indentation in the -X/-XX modes
This commit changes the processing principle of the -X/-XX modes
from 1-pass to 2-pass. A separate width measurement stage has been
added, so that the real maximum widths can be measured and used
for correct indentation.
The firstmapping variable now has a new value (2) used for the
width measurement stage (1st pass). The printing is disabled
in this stage. The file position is reset to the beginning
of the file once the end of file is reached and the printing stage
(2nd pass) begins.
It's questionable if this approach is sensitive to Read-after-Write
race conditions. Anyway, this feature is a good candidate for
a complete redesign in the future.
Additionally this commit introduces a final cleaning of the list
used for the evaluation of totals in the -X/-XX modes.
Jim Warner [Thu, 31 Jan 2013 06:00:00 +0000 (00:00 -0600)]
top: lift the field management 6 col width restriction
When two somewhat cryptic error messages were recently
changed to more user friendly text, the logic limiting
maximum columns was left unchanged at six. This always
was a rather arbitrary limit but now the revised error
message could actually be misleading (ok, a huge lie).
With a 1 line code change (macro actually), this patch
lifts the internal restriction on maximum columns. Now
the real limit is based on a window's physical x-axis.
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Jim Warner [Thu, 31 Jan 2013 06:00:00 +0000 (00:00 -0600)]
top: disable tty scrollback buffer to improve SIGWINCH
A scrollback buffer used in several terminal emulators
could be a real inconvenience to a user following some
resize operations. Extra keystroke(s) would frequently
be required in order to properly render top's display.
After much sleuthing we unearthed two terminfo strings
which have the effect of disabling/restoring that darn
scrollback buffer. They were well hidden under a title
of strings 'to start/end programs using cup'. In turn,
'cup' deals with a tty's cursor addressing capability.
We don't care what you call them or what they refer to
so long as they get the job done. And these really do!
Be advised, however, that there are some side effects,
several of which can even be considered as beneficial:
. enter_ca_mode/smcup/ti disables scrollback buffering
( and that's good, it's what we had always hoped for )
. exit_ca_mode/rmcup/te restores the scrollback buffer
( but also restores screen contents existing pre-top )
( which is different from former program end results )
( where that last rendered screen was left untouched )
. the above screen replacement would impact ^Z suspend
( thus we keep the scrollback buffer disabled during )
( the suspend/resume sequence so that the users will )
( have a visual clue that top is suspended not ended )
If a terminal does not support these terminfo strings,
we will revert to top's former behavior at program end
where we position the cursor at screen bottom and then
output a single newline character. This will prevent a
shell prompt from embedding within top's final screen.
This commit's approach has been tested under a variety
of emulators and window managers, many of which linked
with libvte and others that employed their own scheme.
Examples are: gnome_terminal; kde konsole; lxterminal;
terminator; terminology; urxvt; xfce4-terminal; xterm.
I do now believe that the whole SIGWINCH deal is done!
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Jaromir Capik [Mon, 4 Feb 2013 17:21:39 +0000 (18:21 +0100)]
pmap: empty output or crashes on ppc/s390 caused by wrong pidlist type
Previously the pidlist variable was defined as unsigned long *
whilst the openproc function accepts pid_t *.
Both target types differ in size (8 != 4) and therefore the issue
mainly affects big endian architectures.
This commit changes the pidlist type to pid_t * so that it's
compatible with openproc.
projects / procps-ng / log