sysctl.conf manpage - new NOTES section helps variable listing
sysctl.conf manpage now explains what tools to use to list all modifiable variables.
See merge request !28
Still unhappy with a minor memory leak associated with
libnuma, I experimented with omitting the dlclose that
was issued at module's end. For some reason which will
remain a mystery, the valgrind leak then went bye-bye.
So this patch just omits one use of dlclose and relies
on whatever kernel magic is at work to free the memory
when each process ends. We kept, however, the original
code (now commented-out) to serve as a future caution.
There remains one potential (but unlikely) dlclose use
near the original dlopen. But there will be no leak as
that 'numa_node_of_cpu' will not yet have been called.
This seems to be the culprit that triggers such leaks.
None of this libnuma shit would likely have come close
to hitting our fan had the numa developers provided us
with 'new' and 'unref' functions like our newlib does.
[ this commit parallels a patch in our newlib branch ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
There is now a warning if your command is longer than 15 characters
and therefore can never match. Except it was checking for more than
16 characters.
Adjusted this and added a test case.
References:
!25
commit 8e8835b2ee
pgrep - adds warning that pattern exceeds 15 chars without '-f' option
Resolves many questions seen on forums around the web. Adds a decent warning about the behaviour.<br>
Ideas about better text?
See merge request !25
kill: Fix free() with bad pointer on SIG-prefixed signal-name
kill -l SIGHUP (or any other signal-name prefixed with "SIG")
would cause free() to be called with a bad pointer instead of
a pointer to what was allocated. Fix this and add test-case.
See merge request !26
Ever since its introduction, the 'x' (extended format)
option has employed strncmp to parse those smaps keys.
Such an approach worked well as long as those prefixes
were guaranteed to be unique. But, with the 4.3 kernel
a new 'SwapPss' field was added to those within smaps.
That triggered a 2nd match for the 'Swap' logic which,
in turn, resulted in a duplicate output line of zeros.
So this patch just trades strncmp for strcmp, avoiding
potential future problems when /proc/$$/smaps evolves.
Reference(s):
. recent bug report
https://bugzilla.redhat.com/show_bug.cgi?id=1374061
. linux 4.3 kernel introduces SwapPss
commit 8334b96221ff0dcbde4873d31eb4d84774ed8ed4
. original pmap -x option introduction
commit 380cc1e908
Signed-off-by: Jim Warner <james.warner@comcast.net>
kill -l SIGHUP (or any other signal-name prefixed with "SIG")
would cause free() to be called with a bad pointer instead of
a pointer to what was allocated. Fix this and add test-case.
FreeBSD doesn't have SIGPWR so makes no sense in warning and assuming
its 29.
References:
https://bugs.debian/org/832148
Signed-off-by: Craig Small <csmall@enc.com.au>
After discovering those terrible costs associated with
/proc/status vs. /proc/stat, the build_header function
changed to favor the latter for a field found in both.
Well, low-and-behold, this top program still used some
flags that needlessly caused 'status' to still be read
when 'statm' could have served. And, while top's needs
require conversion from pages to KiB, that's still far
less costly than reading that gosh darn 'status' file.
[ this patch parallels similar changes to newlib top ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Long ago, in a galaxy far away, top was convinced that
/proc/stat was to be favored over /proc/status if some
field could be satisfied with either. This was done to
avoid extra costs of 64-bit math for 32-bit platforms.
Well, its time to acknowledge the prevalence of 64-bit
platforms. And in such an environment there is a large
hidden cost currently if using status instead of stat.
In fact, that cost difference can be as high as 1400%.
So, this commit will coax top into favoring that least
costly route while also fixing an EU_TGD library flag.
[ this patch parallels similar changes to newlib top ]
Signed-off-by: Jim Warner <james.warner@comcast.net>
Profiling revealed a large amount of time spent in the
'escape_str_utf8' function (escape.c) with both of our
NLS branches (newlib and master). That same result was
not seen under an ancient top-3.2.8 program & library.
Well, the 3.2.8 result was ultimately explained by the
absence of a 'setlocale', necessary under NLS support.
Thus, when that ancient library tested for locale, all
it got was 'ANSI_...' & assumed 'UTF-8' wasn't active.
But after a hack to that ancient code to place it on a
par with newlib/master, I still found cost differences
that led me to revisit an old change referenced below.
It turns out that 'iswprint' costs far more than would
a call of 'isprint', even with the extra support code.
So this commit just reverts that five year old change.
[ this patch parallels a similar change under newlib ]
Reference(s):
commit 7b0fc19e9d
Signed-off-by: Jim Warner <james.warner@comcast.net>
configure.ac: use pkg-config to get ncursesw header location
Don't assume ncursesw headers are in ../usr/include/ncursesw/..
On a pure build/system without legacy ncurses that may not be true.
Since we're using pkg-config let it provide the correct include path.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
See merge request !23
sysctl.c: use strchr() instead of index()
index() is a legacy function, which is no longer implemented by all C
libraries (example: uClibc). Instead, use the POSIX defined strchr()
function.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
See merge request !22
ps/output.c: include <dlfcn.h> only when necessary
dlopen() functionality is only used when SELinux support is enabled, so
<dlfcn.h> only needs to be included when ENABLE_LIBSELINUX is
defined. This fixes the build in configurations where <dlfcn.h> is not
available.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
See merge request !21
Fixing invalid reads in find_elf_note due to setenv invocation
Resolves issue on mailing list from 12 Nov 2014 and Red Hat Bugzilla 1163404.
See merge request !20
Fixing is_disk() which mistakes devices with name longer than 20 chars for partitions.
Associated with previous vmstat -d enhancement commit.
See merge request !19
Don't assume ncursesw headers are in ../usr/include/ncursesw/..
On a pure build/system without legacy ncurses that may not be true.
Since we're using pkg-config let it provide the correct include path.
Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
index() is a legacy function, which is no longer implemented by all C
libraries (example: uClibc). Instead, use the POSIX defined strchr()
function.
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
dlopen() functionality is only used when SELinux support is enabled, so
<dlfcn.h> only needs to be included when ENABLE_LIBSELINUX is
defined. This fixes the build in configurations where <dlfcn.h> is not
available.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit provides for raising the total displayable
fields from its current 70 to 86. It also bumps the id
in an rcfile representing the version from 'i' to 'j'.
The increase in number of fields will make sharing the
rcfile with an older top, once it's saved, impossible.
These changes are being done via a #define rather than
hard coded so any such sharing will still be possible.
Signed-off-by: Jim Warner <james.warner@comcast.net>
For a specific slice of kernel versions we can get a better
estimate of the available memory before the "real" available
figure appears around kernel 3.2
However, that middle method requires a /proc/sys/vm directory.
FreeBSD 9.x used to emulate a < 2.6.27 kernel procfs meaning
it never tried the middle method. FreeBSD 10.x emulates something
more modern, but without the available figure and without a
/proc/sys/vm, so the library falls into a hole.
Hurd may to one day have this bug so we'll exclude him as well
as its triggered by whatever number appears in
/proc/sys/kernel/osrelease
References:
commit 3f3b1a59adhttps://bugs.debian.org/831396
Whoa, I had never considered an alternative to ncurses
until the issue referenced below was raised. Thus, I'm
surprised to find that 'tparm' was the only impediment
to ultimately utilizing this alternate curses library.
And, while we could have substituted that non-standard
'tiparm' with only 2 arguments, we'll utilize the full
parms compliment in the spirit of that original patch.
Frankly, the task of developing an alternative library
to that ncurses implementation really boggles my mind.
Congratulations to rofl0r, whoever that masked man is.
Reference(s):
. issue raised
https://gitlab.com/procps-ng/procps/issues/38
. netbsd-curses home
https://github.com/sabotage-linux/netbsd-curses
Signed-off-by: Jim Warner <james.warner@comcast.net>
Those infernal arches of kfreebsd-i386 (not -amd64) don't define
HOST_NAME_MAX. This patch is a work-around for those systems with
lacking include files.
Because I don't know how to redirect properly in tcl, there are
some small scripts that do this for me. With your standard
make check, all is good because the scripts and the binary are
in the usual spots.
make distcheck however puts them all over the place. The binary is
in a different tree to the test and aux scripts. The change now
tells where aux script where its binary is.
If process_ansi encountered an unknown character when processing an ANSI
escape sequence, it would ungetc all the characters read so far, except
for the character just read, and the opening '\033['. ungetting the
middle of the escape sequence does not produce useful results, and also
relies on the unportable assumption that ungetc works on multiple
characters (which glibc does not support). Discard the characters
instead.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
process_ansi stopped processing an ANSI escape sequence if
(c < '0' && c > '9' && c != ';'), which will never happen. Fix the
range check to use || instead.
Signed-off-by: Josh Triplett <josh@joshtriplett.org>
process_ansi assumed all numbers in a color control sequence correspond
to colors or attributes, which breaks badly if it encounters a
ISO-8613-3 escape sequence (such as for truecolor RGB). For instance,
the sequence "\x1b[38;2;10;20;30m" sets the foreground color to
rgb(10,20,30), but watch will interpret all five numbers in the sequence
as colors or attributes themselves.
Stop processing the entire escape sequence if watch encounters any
number it doesn't understand, as that number may change the meaning of
the rest of the sequence.
Previously there was a commit to change all noinst_PROGRAMS into
check_PROGRAMS. This was not a good idea.
check_PROGRAMS are built before TESTS are run. However they are
NOT build before the dejagnu tests are run, causing those tests
to fail.
So:
If the program is required for dejagnu, it needs to go into
noinst_PROGRAMS
If the program is required for TESTS or is one of those TESTS,
it needs to go into check_PROGRAMS
For some unknown reason, check_PROGRAMS are not built before check.
They are built before recheck and after check, which isn't very
useful.
This means any tests by dejagnu that need those programs will fail.
On my console I get a build error, the CI merrily reports the error
but considers the build OK; go figure.
The kludge adds check_PROGRAMS to be a dependency to check.
Note, TESTS don't need to be included in this, because they are
properly compliled after the dejagnu tests but before they are
run.
As part of the fix to truncate the command in non-8bit, watch had
the function for output_header changed (much for scope cleanliness
and cohesiveness than anything; so I'm going to blame Meyer)...
Anyhow the 8bit enabled version did not have that update which
meant watch failed to compile. Thanks to @asavah for issue #37
and the patch.
References:
commit 5a40c7970d
For what could be our last oldlib release, why not try
to make the NEWS a little more readable. So, it's been
reorganized by category and bug fixes were out-dented.
Signed-off-by: Jim Warner <james.warner@comcast.net>
For this release, what's likely to be our last oldlib,
we really no longer care when top or ps threads access
is made a little less efficient. This is especially so
when efficiency was gained at the expense of accuracy.
The newlib branch already has turned off QUICK_THREADS
so this patch just brings the master branch into line.
Reference(s):
https://bugzilla.redhat.com/show_bug.cgi?id=1284091
Signed-off-by: Jim Warner <james.warner@comcast.net>
On MacOS the system already has user_from_uid and group_from_gid.
These are renamed pwcache_get_user and pwcache_get_group.
For the old library, pwcache_get_user needs to be exported
for skill.
References:
https://gitlab.com/procps-ng/procps/issues/34
Signed-off-by: Craig Small <csmall@enc.com.au>
This patch adapts the ps program to a newly add proc_t
field and provides for new support in that top program
along with his man document (ps was already ok there).
Signed-off-by: Jim Warner <james.warner@comcast.net>
