Commit Graph

1828 Commits

Author SHA1 Message Date
Jim Warner
b4bce3b8fa top: adapt utf8 logic to support extra wide characters
Back when top was refactored to support UTF-8 encoding
it was acknowledged that languages like zh_CN were not
supported. That was because a single 'character' might
require more than a single 'column' when it's printed.

Well I've now figured out how to accommodate languages
like that. My adaptation is represented in this patch.

[ and just in case someone wishes to avoid the extra ]
[ runtime costs, a #define OFF_XTRAWIDE is included. ]

Along the way, I've cleaned up some miscellaneous code
supporting the 'Inspect' feature so that the rightmost
screen column was always used rather than being blank.

[ interestingly, my xterm & urxvt terminal emulators ]
[ are able to split extra wide characters then print ]
[ 1/2 of such graphics in the last column. the gnome ]
[ terminal emulator does not duplicate such behavior ]
[ but prints 1 extra character in same width window. ]

Reference(s):
. Sep, 2017 - original utf8 support
commit 7ef38420a4

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-12 20:53:56 +11:00
Jim Warner
dfa118b4d5 top: tweak that recent enhancement to startup defaults
When the new approach for startup defaults was adopted
in the reference below, a file might be left open that
technically should be closed. This situation arises in
the unlikely event the #define RCFILE_NOERR is active.

Without that #define, the program will exit early thus
rendering the open file issue moot. However, even with
that #define there was no real harm with an open file.
It simply meant a 2nd FILE struct would have been used
when, or if, the rcfile was written via a 'W' command.

Anyway, this patch ensures such a file will be closed.

Reference(s):
. Dec, 2017 - /etc/topdefaultrc introduced
commit 3e6a208ae5

Signed-off-by: Jim Warner <james.warner@comcast.net>
2018-02-12 20:53:56 +11:00
Craig Small
e82dd07b3b free: Update tests and fix for previous patch
The previous two patches updated free, but needed a tweak and the tests
also needed to be updated. I've hand-calculated the results using bc and
both the testsuite and bc results equal what free prints out.

References:
 commit 9365be7633
 procps-ng/procps#45
2018-01-13 16:09:54 +11:00
getzze
9365be7633 free.c - name correctly the binary multiples in the human-readable case 2018-01-13 15:40:35 +11:00
getzze
27d0b400de free.c - correct conversion to decimal multiples 2018-01-13 15:38:59 +11:00
Craig Small
a238a687ce docs: Document I idle state in ps and top
Linux 4.2 provided a new process state of I which is used for an idle
kernel thread. This new state means that kernel threads do not
contribute to the loadavg as they are no longer state D or S but I.

While both ps and top displayed this state, it wasn't documented in
either manual page until now.

References:
 https://bugs.debian.org/886967
 https://www.quora.com/What-does-mean-Linux-process-state-I-in-the-top-output
 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=80ed87c8a9ca0cad7ca66cf3bbdfb17559a66dcf
2018-01-13 11:18:09 +11:00
Craig Small
272c5b0f8c sysctl: Don't crash file fopen fails
The commit referenced below put a setvbuf() before checking what
fopen() returned. If the file could not be opened then the file
handle was NULL at setvbuf() crashed.

setvbuf() is now called after checking what fopen() returns and only
when it was successful.

References:
 procps-ng/procps#76
 commit 58ae084c27
2018-01-07 12:25:35 +11:00
Craig Small
cde5cf5bab Merge branch 'Polynomal-C/procps-master'
References:
 procps-ng/procps!47
2017-12-29 15:57:43 +11:00
Sven Eden
776b0791ba Add support for elogind
A session manager similar to logind from systemd.
See https://github.com/elogind/elogind

Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>
2017-12-29 15:57:14 +11:00
Jan Rybar
a395137acd docs: Mention in sysctl.8 that a filename is read once
Added note into sysctl.8 manpage about directory precedence.

This information may be important for users who create new config files at several destinations. Especially the information about files to be omitted in directories with lower priority shall be given.
2017-12-29 15:37:49 +11:00
Craig Small
2da3c0c5bf Add news for previous commit
References:
 procps-ng/procps!55
 387e2cf
2017-12-29 15:26:10 +11:00
Craig Small
adc561d023 Merge branch 'tbodt/procps-master' 2017-12-29 15:24:34 +11:00
Theodore Dubois
387e2cf1ff Allow empty string for value 2017-12-29 15:23:54 +11:00
Craig Small
cc6bade6d8 Merge branch 'jrtc27/procps-cross-platform' 2017-12-23 17:50:03 +11:00
James Clarke
bd72ba3a4b sig: Move runtime signal count check to compile time
Since the value of number_of_signals is known at compile time, we can
use a compile-time check instead. This also adds SIGLOST for the Hurd,
uses the correct signal counts for the Hurd and FreeBSD, and only gives
a compile-time warning when compiled on an unknown platform that it does
not know whether the number of signals is correct.
2017-12-23 17:48:36 +11:00
Jim Warner
3e6a208ae5 top: allow more flexible approach for startup defaults
Those references below offer more detail regarding the
default startup changes beginning with version 3.3.10.

It is important to remember that all such changes were
supposed to impact only new users or users who had not
saved the personal config file (via that 'W' command).
However, I introduced a bug wherein the rcfile was not
fully honored. This gave the changes a bad reputation.

That bug was corrected in release 3.3.11 but the issue
of default startup options keeps resurfacing. And it's
clear there's no consensus on what should be included.

Our --disable-modern-top configure option is of little
help since it remains an all-or-nothing approach. What
we need is an answer offering unlimited customization.
So, this commit will provide distribution packagers or
system administrators with a much more flexible way to
set their own preferred startup default configuration.

A new rcfile is being introduced: '/etc/topdefaultrc',
whose format/content is the same as a personal rcfile.
Thus once a 'proper' enterprise configuration has been
established and saved via 'W', it can be copied to the
/etc/ directory. Thereafter, startup in the absence of
a saved rcfile will use that configuration as default.

Now if a distribution packager or system administrator
wishes to expose their users to some of top's advanced
capabilities they can do so gradually. Perhaps setting
up graph mode for summary area task and memory display
while retaining the %CPU sort could be tried. Or maybe
showing colors, but better customized for a particular
terminal emulator. Such possibilities are now endless.

[ in exploiting this new capability, i hope that the ]
[ other windows (alt display mode) aren't overlooked ]

Reference(s):
. Sep, 2014 - Not fully honoring rcfile bug discussed
https://www.freelists.org/post/procps/top-saved-rcfile-bug
. Oct, 2014 - Attempt to defend new startup defaults
https://bugzilla.redhat.com/show_bug.cgi?id=1153049
. Jul, 2015 - Forest vs. %CPU views discussion
https://gitlab.com/procps-ng/procps/issues/6
. Oct, 2017 - Question the use of --disable-modern-top
https://bugzilla.redhat.com/show_bug.cgi?id=1499410
. Oct, 2017 - Forest vs. %CPU views discussion again
https://www.freelists.org/post/procps/Forest-mode-by-default-in-top-seems-a-bit-strange
. Dec, 2017 - Rehash of 3.3.10 startup defaults change
https://gitlab.com/procps-ng/procps/issues/78

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-23 17:41:37 +11:00
Jim Warner
0003d704ac library: relocate the typedef used in alloc.h override
There is no longer justification for placing a typedef
employed in overriding that alloc.h message handler in
the procps.h header file. So this commit just moves it
to the alloc.h header file itself where's it's needed!

[ gosh, sure wish i had thought to relocate this guy ]
[ when the changes in the 1st commit shown were made ]

Reference(s):
. most recent related changes
commit 18e5aecd2b
. place where it *should* have been relocated
commit 2865ded64e

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-23 17:41:37 +11:00
Jim Warner
cdf8eac99e top: miscellaneous changes to whitespace/comments only
[ ok, there's also 1 newly added #undef included too ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-23 17:41:37 +11:00
Craig Small
dd47a9744f docs: Update pgrep.1 example to more modern browser 2017-12-22 14:56:08 +11:00
Craig Small
f9bef2b2c3 watch: Support ANSI 39,49 reset sequences
ANSI colour sequences 39 and 49 reset the foreground and background
colours respectively. This feature was missing from watch using the
colour "-c" option.

References:
 Fixes #73
 https://en.wikipedia.org/wiki/ANSI_escape_code#SGR_(Select_Graphic_Rendition)_parameters
2017-12-20 22:09:41 +11:00
Jim Warner
1013f2719d slabtop: let's stop always ignoring the last slab node
This patch will fix a fencepost error that has existed
since at least 2004, the result of which was to always
completely ignore that last merged / sorted slab node.

[ Of course, little harm was done since output would ]
[ have been limited to a terminal's height. Thus, it ]
[ would have required a huge display before noticed. ]

[ But, now that the run once switch shows everything ]
[ such an omission would become really unforgivable. ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:54 +11:00
Jim Warner
0ef497bb35 slabtop: for run_once switch (-o), output all slabinfo
It doesn't make sense to restrict the number of output
lines to the total of terminal rows when using the run
once command line switch. And, in fact, that's how the
newlib version of slabtop works. Everything is output.

So, this commit places both versions on equal footing.

[ it was even worse if the switch was used in a pipe ]
[ since only 23 lines would have then been displayed ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:49 +11:00
Jim Warner
18e5aecd2b top: exploit msg handler override to avoid corrupt tty
Way back in November of 2011, the library was equipped
with an overridable error message handler function. It
was done expressly for a program like top which alters
the tty. But that support was withdrawn shortly after.

This was all done in the lead up to v3.3.2. That's the
release where NLS support was added and it represented
a hectic time. In hindsight, the changes went too far.

So this commit, in a minimal fashion, restores ability
to address a potential fatal library error. After all,
any properly behaving library would never unilaterally
subject a caller to a stderr message and then an exit.

[ when exposing 1 variable in libprocps.sym, 2 other ]
[ existing symbols were repositioned alphabetically. ]

Reference(s):
. generalized library memory provisions
commit 7126cc4491
. top exploit library memory provisions
commit 88087ec5a5
. library xalloc type functions made private
commit 2865ded64e
. restored prior top memory logic
commit 05f5deb97c

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:44 +11:00
Jim Warner
0a91e21d3a top: add and/or expand a couple more translation hints
After noticing that the 'uk' translation expanded what
was supposed to be a 3 line header into 5 lines, seems
appropriate to offer more guidance on max lines count.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-12-20 21:07:35 +11:00
Jim Warner
4e2a1ba9b1 top: stop neglecting potential utf8 field descriptions
And I thought those strange characters I saw with only
certain translations in Fields Management descriptions
were resulting from my terminal emulator deficiencies.

Turns out that ol' top wasn't addressing possibilities
of such descriptions ending with multi-byte sequences.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
1ba0e999c6 top: eliminate that potential vulnerability for TOCTOU
Initially, I was going to ignore that coverity warning
CID #177876. But, since top may be running SETUID it's
best if it can be avoided instead. The fix was simple.

We'll trade the access() call for a real fopen() call.
This time-of-check-time-of-use warning should go away.
------------------------------------------------------

When XDG support was originally introduced in top, the
author made a poor choice in access(). A real question
that needed asking was 'does the file exist'. However,
the question that was asked was 'can this real user ID
or this real group ID access the file'. Then, when the
fopen() is finally issued, top would use the effective
user ID or the effective group ID to access that file.

That's what opened the potential TOCTOU vulnerability,
which was important only if top was running SUID/SGID.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
0f5d503103 top: make 'utf8_justify' independent of non-utf8 logic
By eliminating the call to 'fmtmk', the 'utf8_justify'
function could more easily be used in libproc someday.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
ac76afee36 top: utf8 utils should observe indentation conventions
Gosh, all this time we used indents of 4 spaces, not 3
spaces which were always the top standard indentation.

[ and we made our 'utf8_embody' a little more robust ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
fba7a919fb top: ensure bug report suggestion agrees with man page
The top man page was changed back on 10/20/15, in that
commit shown below. There, freelists.org was suggested
as the bug reports recipient. But, the program was not
changed from the original Debian bug reports approach.

Reference(s):
commit b1f7b2a509

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-14 21:44:56 +11:00
Jim Warner
f762cd5660 top: make the 'utf8_proper_col' routine more efficient
This patch better exploits short-circuit evaluation in
two 'if' tests. In every case, the 1st of 2 conditions
in each 'if' test must take place but it always proves
true with each iteration for 1 of the 'if' statements.
Thus, the 2nd condition will have to be evaluated too.

By reordering 2 tests in each 'if', we can ensure that
the 2nd condition will then be tested much less often.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
abde5d7d5e top: make that 'make_str_utf8' function more efficient
Upon reflection, there was absolutely no justification
for that call to strlen() which was then followed by a
call to snprintf(). The latter provides this needed #.

[ also make that 'delta' value a little more visible ]
[ instead of hiding it at the end of a its code line ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
6597ac227d top: ensured one translation hint agrees with template
Now that top can properly handle translated multi-byte
strings I've been reviewing translated efforts so far,
and weighing output against related translation hints.

In one case, a translation hint has not kept pace with
the current program state. In addition, that same hint
could be expanded to suggest translation alternatives.

[ frankly I never expected the translators to tackle ]
[ some of those 'special' strings. the task appeared ]
[ just too daunting. but they have done a great job! ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
18958c507e top: improve the translator hint regarding field width
Reference(s):
https://www.freelists.org/post/procps/Does-COMMAND-really-have-to-be-at-most-7-characters,2

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-07 09:01:55 +11:00
Jim Warner
f6ee2c0085 top: correct an insidious occasional truncation buglet
With the help of our Swedish translator, hopefully the
final buglet has now been vanquished in the multi-byte
translation support. This one was a real nasty bugger.

Although it didn't occur with every terminal emulator,
occasionally random text lines were being chopped off.

As it turns out, those terminals were blameless. There
were two separate places in top's show_special routine
where potential multi-byte sequences were inadequately
addressed. Solution: exploit existing utf-8 functions.

[ it also became apparent that the translation hints ]
[ in the top_nls module were deficient. so a special ]
[ caution was added regarding the final line of txt. ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-02 22:20:58 +11:00
Jim Warner
d5a9965cde top: plug a small potential hole in multi-byte support
Unlike the insp_mkrow_raw function the insp_mkrow_utf8
routine is not equipped to print non-ctl, non-printing
characters like '<7f>'. However, technically that very
value currently slips through the cracks. So with this
patch top will now print a space in the unlikely event
a character with the value of 127 is ever encountered.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-02 22:20:58 +11:00
Jim Warner
62367defa2 ps: don't use '+' truncation indicator with multi-byte
The ps program generally supports multi-byte sequences
in strings representing user and group names. However,
should a multi-byte sequence span the maximum width of
a column, the '+' inserted by ps to signify truncation
will corrupt that sequence, misaligning the text line.

Unfortunately, there's insufficient info returned from
the escape_str function (who calls escape_str_utf8) to
provide a robust response. So, this commit will revert
to the old standby of displaying a number when the '+'
character would've corrupted that multi-byte sequence.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-02 22:20:58 +11:00
Jim Warner
cd88d4538b top: extend utf-8 multi-byte support to users & groups
Since all the necessary utf-8 plumbing is now in place
this commit will extend multi-byte support to user and
group names. Now top will be on a par with the ps guy.

[ plus, it's also my way of showing appreciation for ]
[ all those investments silently made by translators ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:30:16 +11:00
Jim Warner
d002bdc455 top: some minor tweaks to the utf-8 multi-byte support
Translatable column headers are supposed to be limited
to no more than 7 characters, even though some columns
are wider than that or even variable width. That value
of 7 is dictated by the Fields Management screen which
will otherwise truncate a column header longer than 7.

Our new utf-8 support did not adequately deal with the
potential need for truncation of column headers should
that limit of 7 be exceeded. This patch corrects that.

[ a few comments were also tweaked just a little bit ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:30:16 +11:00
Jim Warner
0902221b95 NEWS: acknowledged top's multi-byte support extensions
Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
fad0c62076 top: extend multi-byte support to 'Inspection' feature
The previous commit implemented multi-byte support for
the basic top user interaction and display provisions.
This commit completes multi-byte support by addressing
that 'Inspect Other Output' feature (the 'Y' command).

Few people probably exploit this very powerful feature
which allows the perusing of any file or piped output.
And even if nobody uses 'Y', someone will stumble over
it on the help screen and try it out. Assuming top was
not built with INSP_OFFDEMO defined, they'll end up on
the screen our translators have faithfully translated.

Without this patch, such a screen would display with a
bunch of 'unprintable' characters which will then show
in the standard (less-like) way as: '^A', '<C3>', etc.
In other words, those poor screens will be a big mess!

[ this program can even display an executable binary ]
[ while at that same time supporting Find/Find Next. ]
[ imagine, a file with no guarantee of real strings! ]
[ just try a Find using less with such binary files. ]

With this commit, the translated 'Y' demo screens will
now be properly shown, providing no invalid multi-byte
characters have been detected. Should that be the case
then they'll be displayed in that less-like way above.

And, if users go on to fully exploit this 'Y' command,
there is a good chance that a file or pipe might yield
output in a utf-8 multi-byte form. Should that be true
such output will thus be handled appropriately by top.

[ in many respects, this change was more challenging ]
[ than the basic support within the previous commit. ]
[ story of my life: least used = most effort needed. ]

Many thanks to our procps-ng translators which enabled
a proper test of these changed 'Y' command provisions:
. Vietnamese: Trần Ngọc Quân
. Polish: Jakub Bogusz
. German: Mario Blättermann
. French: Frédéric Marchal, Stéphane Aulery

[ and my sincerest apologies too, for my negligence! ]

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
7ef38420a4 top: refactored for correct multi-byte string handling
When this project first began implementing translation
support nearly 6 years ago, we overcame many 'gettext'
obstacles and limitations.  And, of course, there were
not any actual translations at the time so our testing
was quite limited plus, in many cases, only simulated.

None of that, however, can justify or excuse the total
lack of attention to top's approach to NLS, especially
since some actual translations have existed for years.

When the issue referenced below was raised, I suffered
immediate feelings of anxiety, doubt and pending doom.
This was mostly because top strives to avoid line wrap
at all costs and that did not bode well for multi-byte
translated strings, using several bytes per character.

I was also concerned over possible performance impact,
assuming it was even possible to properly handle utf8.

But, after wrestling with the problem for several days
those initial feelings have now been replaced by guilt
over any trouble I initially caused those translators.

One can only imagine how frustrating it must have been
after the translation effort to then see top display a
misaligned column header and fields management page or
truncated screens like those of help or color mapping.
------------------------------------------------------

Ok, with that off my chest let's review these changes,
now that top properly handles UTF8 multi-byte strings.

. Performance - virtually all of this newly added cost
for multi-byte support is incurred during interactions
with the user. So, performance is not really an issue.

The one occasion when performance is impacted is found
during 'summary_show()' processing, due to an addition
of one new call to 'utf8_delta()' in 'show_special()'.

. Extra Wide Characters - I have not yet and may never
figure out a way to support languages like zh_CN where
the characters can be wider than most other languages.

. Translated User Name - at some future point we could
implement translation of user names. But as the author
of the issue acknowledged such names are non-standard.
Thus task display still incurs no new multi-byte costs
beyond those already incurred in that escape.c module.

For raising the issue I extend my sincerest thanks to:
Göran Uddeborg

Reference(s):
https://gitlab.com/procps-ng/procps/issues/68

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Jim Warner
01fb8d5a78 top: correct a minor instance of wrong NLS macro usage
The 'N_fmt' and 'N_txt' macros are interchangeable and
just highlight the 2 str types found in Norm_nlstable.

The change in this patch (strictly cosmetic) was found
during the coding for what will be the next 2 commits.
It has not been squashed into either of those so as to
not muddy up the waters for what was a major refactor.

Signed-off-by: Jim Warner <james.warner@comcast.net>
2017-10-01 22:19:58 +11:00
Craig Small
bda18fd41c add changelog for previous 2017-09-25 09:14:00 +10:00
Craig Small
cae3f1438f vmstat: Fix alignment for disk partition format
The disk partition format translation hint, the actual text and the
printf statements were all diagreeing with each other. This meant
the disk partition output from vmstat was a mess.

Now all the titles and values line up and everything is right-aligned
which looks better than some half-hearted attempt at center-aligned
for titles and right-aligned for values.

Thanks to @goeran for the heads-up in #69
2017-09-25 09:09:57 +10:00
Craig Small
04835608dd Merge branch 'lakerka/procps-patch1'
* lakerka/procps-patch1:
  whattime: Fix formatting
  whattime: Show 0 minutes in pretty output
2017-09-23 17:34:37 +10:00
Kyle Laker
5979696ada whattime: Fix formatting
Update formatting within the if block to two spaces
2017-09-23 17:32:29 +10:00
Kyle Laker
325d68b7c3 whattime: Show 0 minutes in pretty output
When supplying the -p command to uptime, it does not display any
sections where the value is less than 1; however, after a reboot, this
causes the command to just output "up". Showing 0 minutes when the
system has been up for less than a minute makes it clear a reboot just
occurred.
2017-09-23 17:32:29 +10:00
Wayne Porter
53e101452f Consolidated patch of previously merged CYGWIN support
The combined results of merge request #49 without that
overhead plus distortion in this repository's history.

Prototyped-by: Wayne Porter <wporter82@gmail.com>
2017-09-03 20:59:23 +10:00
Werner Fink
854e2c5528 Avoid confusing messages caused by EIO on reading
/proc/sys/net/ipv6/conf/*/stable_secret if those are not set yet.

Signed-off-by: Werner Fink <werner@suse.de>
2017-08-30 22:39:56 +10:00
Werner Fink
58ae084c27 Increase standard I/O buffer a lot to be able to
read huge informations at once as otherwise all files below
/proc/sys, not using the seq_file API at the kernel side,
will return EOF on a second read.

Signed-off-by: Werner Fink <werner@suse.de>
2017-08-30 22:39:56 +10:00