Commit Graph

109 Commits

Author SHA1 Message Date
Jan Pazdziora
5baf1e6226 w: add --pids option to display the pid of the login and best processes. 2023-01-15 04:15:32 +00:00
Chris Down
866abacf88 pgrep: Support matching on the presence of a userspace signal handler
In production we've had several incidents over the years where a process
has a signal handler registered for SIGHUP or one of the SIGUSR signals
which can be used to signal a request to reload configs, rotate log
files, and the like. While this may seem harmless enough, what we've
seen happen repeatedly is something like the following:

1. A process is using SIGHUP/SIGUSR[12] to request some
   application-handled state change -- reloading configs, rotating a log
   file, etc;
2. This kind of request is deprecated and removed, so the signal handler
   is removed. However, a site where the signal might be sent from is
   missed (often logrotate or a service manager);
3. Because the default disposition of these signals is terminal, sooner
   or later these applications are going to be sent SIGHUP or similar
   and end up unexpectedly killed.

I know for a fact that we're not the only organisation experiencing
this: in general, signal use is pretty tricky to reason about and safely
remove because of the fairly aggressive SIG_DFL behaviour for some
common signals, especially for SIGHUP which has a particularly ambiguous
meaning. Especially in a large, highly interconnected codebase,
reasoning about signal interactions between system configuration and
applications can be highly complex, and it's inevitable that on occasion
a callsite will be missed.

In some cases the right call to avoid this will be to migrate services
towards other forms of IPC for this purpose, but inevitably there will
be some services which must continue using signals, so we need a safe
way to support them.

This patch adds support for the -H/--require-handler flag, which matches
on processes with a userspace handler present for the signal being sent.

With this flag we can enforce that all SIGHUP reload cases and SIGUSR
equivalents use --require-handler. This effectively mitigates the case
we've seen time and time again where SIGHUP is used to rotate log files
or reload configs, but the sending site is mistakenly left present after
the removal of signal handler, resulting in unintended termination of
the process.

Signed-off-by: Chris Down <chris@chrisdown.name>
2023-01-15 04:05:40 +00:00
Craig Small
dd3cb0892d ps: Correct BSD c option
procps 3.3.17 the c option changed the command/args field
to cmd but this got removed as part of newlib

Functionality is back in with a test case.

References:
 https://bugs.debian.org/1026326

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-12-19 16:50:12 +11:00
Craig Small
f7a33746f8 skill: Restore the -p flag functionality
When the skill program was ported to the new API the code to filter
on PID, used by the -p option, was missed. It is now restored.

References:
 https://bugs.debian.org/1025915
2022-12-12 16:46:36 +11:00
Craig Small
15a0a71406 testsuite: Update the library tests for new location
Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-08-29 20:40:45 +10:00
Craig Small
56db0bd32c build-sys: Update tests to new binary locations 2022-08-29 19:13:10 +10:00
Craig Small
38693960a1 testsuite shmid can be hex too
Previously the match for shmid was \d+ but the variable is printed
as a hex number, updated the regex to suit.

Added some changes for pmap test so if the test_shm process fails
we just skip past it.

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-05-03 19:37:39 +10:00
Craig Small
9c5397a941 testsuite: Add check for shared memory
Created a test process test_shm that allocates a shared memory
segment and prints the segment ID. pmap testsuite runs pmap to
check that the segment is found.

The value returned by shmget() is the same value that is printed
in the fifth column /proc/<PID>/maps

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-04-26 22:04:05 +10:00
Craig Small
7597aaf7f9 testsuite: Add AIX field checks for ps
AIX fields (generally %char) have had some love now but
are parsed slightly differently to other fields, so they
have some tests.

References:
 commit 4fbf8d22a9
 https://www.freelists.org/post/procps/some-procpsn4400-fixes,7
Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-04-09 14:50:53 +10:00
Craig Small
b159c198c9 sysctl: print dotted keys again
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 6389deca5b
 https://www.freelists.org/post/procps/some-procpsn4400-fixes,4
 https://repo.saltproject.io/

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2022-04-09 14:18:28 +10:00
Craig Small
b98e5657ee testsuite: ps out tests more lenient
Sometimes due to race conditions or the way dejagnu gates the
output, or even there is another interesting process, the ps tests
sometimes fail. These changes make it a little more lenient without
losing the purpose of the test.

Replaces Debian patch ps_tests

References:
 https://salsa.debian.org/debian/procps/-/blob/debian/2%253.3.17-7/debian/patches/ps_checks
2022-03-22 20:20:53 +11:00
Craig Small
d557ad8a6e testsuite: Return error if tty is TTY
In some build systems, such as the Debian pbuilders, the
environment is strange. The tty is called "TTY" which causes
some of the ps tests to fail.

This commit checks for that specific result and returns ""
so the tests can be bypassed.

Replaces Debian patch fix_checks.

References:
 https://salsa.debian.org/debian/procps/-/blob/debian/2%253.3.17-7/debian/patches/fix_checks
2022-03-22 19:53:28 +11:00
Craig Small
4706f225c9 testsuite: Add sysctl test for directory checks
Adds a test to try to write a sysctl parameter above /proc
and passes if it gives an error message.

References:
 commit f25d462166
2021-09-15 20:16:06 +10:00
Craig Small
6389deca5b sysctl: Support systemd glob patterns
systemd-sysctl handles glob patterns along with overrides and
exceptions. Now the procps sysctl does it too.

The return value for sysctl is consistently either 0 or 1.

Added tests to check sysctl functions.

References:
 procps-ng/procps#191

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-09-15 20:07:32 +10:00
Craig Small
db4455cfc9 testsuite: Add test for previous sysctl change
Add a check for path traversal to sysctl.

References:
 commit f25d462166

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-07-20 22:45:17 +10:00
Craig Small
e75bbeb117 testsuite: Add test for free committed
Add a check for free -v for committed memory.

References:
 commit 16734d580e
2021-06-16 20:34:33 +10:00
Craig Small
fc97889b2d build-sys: Handle zero length diskstats in tests
vmstat -d testsuite will fail if your /proc/diskstats is present
but zero length. While this seems buggy behaviour from lxcfs, its
there and its a simple matter to test for it and skip those tests
if we are run on a zero length /proc/diskstats system.
2021-03-29 22:23:03 +11:00
Craig Small
2e1e8fcc85 slabtop: Check for bad d and o option combination
If you run slabtop with the -d option and then -o option the
delay gets set to zero and it runs forever. slabtop now checks
for this combination and errors.

Adding a DEJAGNU test also found that none of the slabtop
checks were running so they got added to the list and only the
ones that need /proc/slabinfo (if not readable) are skipped.

References:
 #160
2021-03-11 22:10:37 +11:00
Craig Small
cce0e21e59 tests: Fix paths for testsuite
make distcheck gets confused what is in srcdir and what is in
topdir

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2021-02-24 20:41:38 +11:00
Craig Small
2c7b575099 build-sys: Make pwait test dependent on pwait built
As pwait building is conditional, testsuite should
only run pwait tests if there is a pwait binary.
2020-12-22 15:20:30 +11:00
Craig Small
4825797d97 testsuite: Add pwait tests
They're pretty simple tests but its something.

References:
  commit 09327c2b77
2020-12-22 13:14:02 +11:00
Arun Chandrasekaran
cd7ea2abf3 kill: use sigqueue to pass value with the signal.
New -q/--queue option for kill so it will send an integer to the
signalled process. See sigqueue(3) for details.

References:
 https://pubs.opengroup.org/onlinepubs/009695399/functions/sigqueue.html
 procps-ng/procps!32

Signed-off-by: Craig Small <csmall@dropbear.xyz>
2020-05-11 17:36:12 +10:00
Craig Small
557fda8f98 build-sys: Enable testing of sigqueue
The referenced commits enavled both pkill and kill to send an integer to
the killed or signalled process. The test_process now will report on the
integer if sent and the testsuite changes take advantage of this
new feature.

Another process make/destroy set had to be made as using spawn
instead of exec changes both the SID and TTY for the underlying
process, making other tests fail.

References:
 commit 7d55409b82
 commit 2b804a532a
2020-05-11 16:59:18 +10:00
Clay Baenziger
e516cf4a18 testsuite: pgrep: Provide test for matching a more than 4k command line; beware as TCL does not seem to match on strings >4k 2019-09-21 17:00:53 +10:00
Craig Small
5d8746b941 misc: fix ps etime tests
The test assumes only one process appears which, depending on the
speed of things, may not be true. It now matches one to many process
lines.
2018-05-03 21:13:16 +10:00
Craig Small
90a4aee474 ps: Add NEWS and checks for times and cputimes
The previous commit had one minor bug in it because the fields need
to be alphabetical and times comes after timeout.

Added NEWS item for this feature
Added another testsuite check for new flags in case they
disappear or go strange one day.

References:
 commit 8a94ed6111
2018-03-02 22:22:25 +11:00
Craig Small
233b5228be 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 16:12:19 +11:00
Craig Small
d8fb86dbc5 Port of merge request 49 to newlib
Wayne Porter made !49 which added Cygwin support to the master branch
This is the port of those changes to newlib
2017-08-19 23:05:22 +10:00
Craig Small
aa41c309dd kill: -l space between name parses correctly
This was supposed to be just a cherry-pick of the referenced
commit. However there were two problems:
 1. kill code was moved out to its own file
 2. strtosig() had a latent bug where signal numbers were not
 converted to names.

Original note:
kill -lHUP would work correctly, but kill -l HUP would not.

The list option in kill was hit by a quirk of getopt_long where an
option with an optional argument would not attempt to get the argument
beyond the space, even though a mandatory argument would do that.

The fix is a kludge to scan to the next argument and if it looks
like something we can use, use it. Lucky for us, the list option is
one where parsing can stop immediately.

Thanks to Brian Vandenberg for the way forward.

References:
 http://stackoverflow.com/questions/1052746/getopt-does-not-parse-optional-arguments-to-parameters
 https://bugs.debian.org/854407
 commit 537cea324b121f54744369425332c256aa84a181
2017-05-22 22:15:59 +10:00
Jan Rybar
9252a04eae pgrep: warning about 15+ chars name only if zero matches found
This avoids situations where longer regex which matches short-named proc
is used. Test for pgrep updated.

This is the newlib update of 5d12be1b7e8cc690a4d8778754aae5db4c07db2b
Signed-off-by: Craig Small <csmall@enc.com.au>
2017-01-26 16:52:23 +11:00
Craig Small
34d040a079 pgrep: add warning that pattern exceeeds 15 chars
Add a warning if you specify a command over 15 characters and don't
use the -f command.

This is a pick of two patches from master:
 24fd260 pgrep: Fix off by one error in line check
 4a7f9fc pgrep - adds warning that pattern exceeds 15 chars without

References:
 !25
2016-09-11 10:40:47 +10:00
Olof Sivertsson
95ed10ff43 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.
2016-09-11 09:58:55 +10:00
Craig Small
6eb4726e6f testsuite: kill test fails on signal names
Some archs have + and - in their signal names, such as hppa
which comes with signals such as RTMIN+-9 RTMIN+-8
The kill -l test failed because of this, we now accept these
odd names.

References:
 https://bugs.debian.org/762764
 https://buildd.debian.org/status/fetch.php?pkg=procps&arch=hppa&ver=1%3A3.3.10-1&stamp=1411601407
2016-04-11 22:12:58 +10:00
Craig Small
2f78b195ad testsuite: check for trailing garbage in pkill
Previous commit fixed pkill for trailing garbage on pkill
signal when it was an integer. This check now ensures that
pkill complains about it.

References:
 commit a3975a9c60
2015-10-14 21:31:56 +11:00
Craig Small
898e3cc3cf testsuite: fix ps signals test
On some setups the signals count can change and be truncated. You
will notice this because the number will have "<" prepended. The
testsuite didn't handle this.
You could either get:
         BLOCKED          BLOCKED          BLOCKED           CAUGHT
CAUGHT          CATCHED
0000000000000000 0000000000000000 0000000000000000 00000001f3d1fef9 00000001f3d1fef9 00000001f3d1fef9

or
  BLOCKED   BLOCKED   BLOCKED    CAUGHT    CAUGHT   CATCHED
 00000000  00000000  00000000 <f3d1fef9 <f3d1fef9 <f3d1fef9
2015-06-14 15:20:48 +10:00
Craig Small
eb6190e61a Do not link test process to libprocps
The test process introduced at 420cd9c7 incorrectly linked to
libprocps which made the CI runner fail.
2015-06-14 08:54:59 +10:00
Craig Small
54fdbb19a2 Skip tests where /proc/vmstat unreadable
testsuite would fail if /proc/vmstat was unreadable.
Issue #3 brought up by Mike Frysinger.
test script explicitly checks to see if it is readable and
sets these tests to unsupported if not.
2015-06-13 15:13:39 +10:00
Craig Small
420cd9c7c2 Create test process
For the test suite, procps used to use sleep which would just
create a process or two to test the tools against.  Some setups
coreutils creates all programs including sleep into one blob which
means a lot of the tests fail, see issue #2

procps has its own sleep program now.
2015-06-13 15:04:31 +10:00
dmarc-noreply@freelists.org
e40b0060c2 tests: slabinfo should not be too strict about slab names
Before this commit, the test checking `vmstat -m` (slabinfo) output uses
a fairly strict regular expression that only allows alphanumeric
characters and a few exceptions such as "_", "-", "(" and ")".

However, recent kernels use a wider range of characters, such as ">".
For instance, see this Linux commit which creates a "page->ptl" slab:
  https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/mm/memory.c?id=b35f1819acd9243a3ff7ad25b1fa8bd6bfe80fb2#n4283

Other patches for reporting slab usage per memcg include the names of
the cgroup in the slabinfo output, which can include additional
characters and use dots for abbreviation.

The check should not be so string, instead it could simply look for a
chain of non-whitespace characters and that should be enough.

Tested that `make check` is still working, including in some of the
environments where features that enable the additional slabinfo names.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Craig Small <csmall@enc.com.au>
2015-05-10 15:05:28 +10:00
dmarc-noreply@freelists.org
af6e264b46 tests: fix regexp in ps_sched_batch.exp to match in first line
The current regexp checks for a \s+ in the beginning, however that will
only match if there is a \n in the `ps` output before test-schedbatch,
but that will not happen if test-schedbatch is the first process in the
list, which happens if the PID of test-schedbatch is low enough to bring
it up in the sorted list.

Fix it by enabling newline-sensitive matching with (?n) which then
allows using ^ and $ anchors in the regexp (including an optional \r
introduced by expect.) Matching the end of line also improves checking
that the last field matches 18 exactly and not something like 181, etc.

Tested that `make check` does not break and also fixed the flakiness
seen in an environment with few processes running under the test user
which made the issue more frequent.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Craig Small <csmall@enc.com.au>
2015-05-10 15:05:02 +10:00
dmarc-noreply@freelists.org
e981f2bbd2 tests: do not mark ps_sched_batch.exp as untested
Right now the test case is both testing it (expect_pass "$test") and
marking it as untested (untested "$test"), it should do either one or
the other, so stop marking it as untested.

Before this change, these lines appear in testsuite/ps.log or the output
of `make check RUNTESTFLAGS="--all"`:

  PASS: ps SCHED_BATCH scheduler
  UNTESTED: ps SCHED_BATCH scheduler

Note that the second line is confusing, it's implying that the test is
untested, right after having tested it and indicated it passes.

After this change, only the first line will appear.

Tested that both `make check` and `make distcheck` continue working with
this commit.

Signed-off-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Craig Small <csmall@enc.com.au>
2015-05-10 15:04:46 +10:00
Craig Small
e0256d1fd6 revert ps_sched checks for following commits 2015-05-10 15:04:19 +10:00
Craig Small
34a1194af8 pgrep SID=1 is valid
On most systems the only process with a SID=1 is init
and certainly not a test sleep.  On docker systems this
test program IS on SID=1 and so our "impossible SID" becomes
possible.
2015-05-09 17:53:08 +10:00
Craig Small
4050148a45 Fix some sched and tty tests
The ps sched test has been disabled. There are too many
odd build farms this fails in strange ways.

Other odd build farms have no tty and so some tests check
for no tty and skip if not found.
2015-05-09 17:48:12 +10:00
Craig Small
f8e98b65ae free: Use IEC units
Free always used 1024 based units but used the confusing old style
kilo,mega etc.

This change changes the names to kibi,mebi for 1024 based divisors
and kilo,mega for 1000 based divisors or IEC units.

It also checks if you try to set two units, e.g free -k -m
Petabyte and Pebibyte have been added.

If you used to use the long options such as --mega these will now
actually print megabytes (they previously printed mebibytes).
The short options are being used on the IEC units

References: https://www.gitorious.org/procps/procps/merge_requests/38

Signed-off-by: Craig Small <csmall@enc.com.au>
2015-04-03 19:18:58 +11:00
Craig Small
12f13f9fc2 Update free testsuite
free got a makeover to suit the newer kernel memory management.
This commit updates the tests to follow the new output for free

Signed-off-by: Craig Small <csmall@enc.com.au>
2014-08-19 22:43:33 +10:00
Craig Small
cacba5613e Reliably kill test processes
It seems command -v also includes built-ins so checking for kill
is useless because it finds the built-in and those machines or
environments that have no /bin/kill fail at the check stage.
Oh and then TCL exec doesn't spawn a shell.

After reading way too many TCL websites, I believe this should
fix the problem. TCL quoting is... different to say the least but
it works reliably here. The script now even picked up a typo elsewhere
which was nice.

This change should stop the intermittent FTBFS bugs from the Debian
pbuilders, I hope! You'd think kill $var wouldn't be this difficult.
2014-07-01 18:51:21 +10:00
Craig Small
f4cc9720ee Reduced partition type check
vmstat -p checks used to fail on systems with odd
partition tables, including some Debian buildd servers.
This change limits what sort of test partitions are used,
otherwise the test is skipped.

There probably are other valid partitions, these can be added
later, if known.
2014-05-27 20:49:16 +10:00
Craig Small
8e7ef322e2 Update help files
Benno Schulenberg suggested some changes to the help messages
to provide some consistency and clarity for both the users and
translators of procps.

The test needed to be updated as the pmap output changed too.

Signed-off-by: Craig Small <csmall@enc.com.au>
2014-02-02 18:13:01 +11:00
Craig Small
5a34ff0a99 Check for presence of disks in vmstat
vmstat -d or vmstat -p would crash mysteriously under different
circumstances. The problem was eventually tracked down to /sys not
being mounted which meant is_disk() always returned false.
The partition would then be attempted to be linked to a non-existent
disk causing a segfault.

vmstat will now not link to a disk if none exists.
The change in testing will skip those tests when /sys/block doesn't
exist.

Many thanks to Daniel Schepler for his analysis and suggestions.

Bug-Debian: http://bugs.debian.org/736628
2014-01-29 22:22:11 +11:00