The '-a' flag[0] which should list the full cmd line seems to be limited
to 4096 chars[1].
In most case it is more than enough, but not always the case for java
processes with long classpaths for instance as describe in the bug
description.
[0] -a, --list-full
List the full command line as well as the process ID. (pgrep
only.)
[1] pgrep.c
44
45 #define CMDSTRSIZE 4096
46
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https://bugs.launchpad.net/bugs/1839329
Title:
pgrep: Use POSIX _SC_ARG_MAX for maximum pgrep -f command line length
Status in procps package in Ubuntu:
In Progress
Status in procps source package in Xenial:
New
Status in procps source package in Bionic:
New
Status in procps source package in Disco:
New
Bug description:
[Impact]
The pgrep -f and pkill -f commands are unable to find processes strings in
processes which are beyond the 4096th character. This often happens with Java
command lines with long classpaths on the command line.
[Test Case]
A quick test to reproduce this is to vi a file using a filename over 4k (e.g.
vi $(seq 1 1250| paste -s -d'_')_foo.txt) and leave vi running; then try
running pgrep -af 'foo.txt' to find it.
[Potential Regression[
[Other Infos]
This bug is a mirror of what has already been reported in GitLab, through the
merge request #85 [1], and has been previously reported at the merge request
#80 [2], with no response/reply.
Let me know if further information is needed, at this point, to
proceed. Thanks!
[1] https://gitlab.com/procps-ng/procps/merge_requests/85
[2] https://gitlab.com/procps-ng/procps/merge_requests/80
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