[Bug 295876] Re: top and ps truncate command after 15 chars

[Dominique Poulain]

Confirmed on latest Xenial for top, `ps -e` and pgrep:

$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu Xenial Xerus (development branch)
Release:	16.04
Codename:	xenial


$ python3 -c 'print(len("chromium-browser"))'
16
$ pgrep chromium-browser
echo $?
1 # exit status code 1 == no processes matched (as per man page for pgrep(1))
$ pgrep chromium-browse
22351
22364
[snip]

$ cat /proc/22351/cmdline && echo
chromium-browser --enable-pinch
$ cat /proc/22351/stat
22351 (chromium-browse) S 1616 1829 1829 0 -1 4194560 37820 20451 701 0 657 236 6 2 20 0 29 0 355501 1262727168 41021 18446744073709551615 94135085649920 94135125690420 140723151897424 140723151896160 140132228684269 0 0 4096 81923 0 0 0 17 2 0 0 64 0 0 94135127791120 94135129570812 94135143915520 140723151902368 140723151902426 140723151902426 140723151904717 

$ ps -e | grep chromium
22351 ?        00:00:08 chromium-browse
22364 ?        00:00:00 chromium-browse
22366 ?        00:00:00 chromium-browse
22464 ?        00:00:02 chromium-browse
22469 ?        00:00:00 chromium-browse
22557 ?        00:00:00 chromium-browse
$ top -b -n 1 -p 22351
[snip]
22351 foo  20   0 1233132 164084 118164 S   0,0  1,0   0:08.85 chromium-browse

related to LP #1174911 'pgrep cuts process names'
<https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1174911>

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https://bugs.launchpad.net/bugs/295876

Title:
  top and ps truncate command after 15 chars

Status in Procps:
  Confirmed
Status in procps package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: procps

  I guess this is an issue with 'top', and not really Ubuntu related,
  but...

  I noticed something hogging my CPU, and top revealed:

  15219 root      30  10  109m 104m 4092 R   92  5.2   1:44.15 update-
  apt-xapi

  Of course, there is no such process called 'update-apt-xapi'.

  top truncates the process name to 15 chars (this was in fact 'update-
  apt-xapian-index' running).

  Nick

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