pgrep -f matches on first 4096 characters only

Asked Mar 03 '20 at 02:30

Active Mar 03 '20 at 03:43

Viewed 300 times

pgrep on a Ubuntu 19.10 matches on a cmd line of about 10000 characters just fine, but the same version (see below) of pgrep on Debian 10 (buster) greps only on the first 4096 characters.

Is there a way to make the Debian version match on the whole cmd line or would this require recompilation?

$ pgrep --version
pgrep from procps-ng 3.3.15

Update 'ps -ef' does not have the 4096 char limit.

edited Mar 03 '20 at 03:43

asked Mar 03 '20 at 02:30

Evgeniy Berezovsky

Does this answer your question? ps only prints up to 4096 characters of any process's command line – muru Mar 03 '20 at 02:38
Wouldn't help even if you recompiled pgrep - the limit comes from /proc/<pid>/cmdline. – muru Mar 03 '20 at 02:38
1

No, I was wrong: the limit is from pgrep: https://gitlab.com/procps-ng/procps/-/commit/f9e56d3c667513d96b798340f7b7c1b40096f084 – muru Mar 03 '20 at 02:44
I noticed this limit of pgrep (and pkill) are affecting me on Fedora 31, too. It's quite frustrating. This limit of pgrep seems unnecessary, and I can't figure out a workaround other than editing the source and recompiling. – Christopher Mar 20 '20 at 06:06

pgrep -f matches on first 4096 characters only

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