Show the command line for a PID, converting nulls to spaces and a newline

xargs -0a /proc/27288/cmdline echo
If you cat the file, all the parts of the command line are bunched up. If you use tr to convert the nulls to spaces, you're still left without a newline unless you add another step. This command does everything for you.
Sample Output
/usr/lib/postgresql/9.3/bin/postgres -D /var/lib/postgresql/9.3/main -c config_file=/etc/postgresql/9.3/main/postgresql.conf

By: dennisw
2015-09-25 17:35:11

2 Alternatives + Submit Alt

What Others Think

Very nice, especially if you combine it with "pgrep -n" - find most recent match: xargs -0a /proc/$(pgrep -n rsync)/cmdline echo
flatcap · 294 weeks and 3 days ago
This is the same as the ps command we figured out yesterday, isn't it? ps h -o %a 21679
BeniBela · 294 weeks and 2 days ago
@benibela: Yes, you're right. Quick post a new command...
flatcap · 294 weeks and 1 day ago
No it's not the same because the ps command will still show only up to the length of your terminal. I have not been able to get it to ignore that (similar to what -l with systemctl/journalctl does).
Tatsh · 294 weeks and 1 day ago
@tatsh: You can add a couple of w's (wide) to ps to make ps show the entire command line: ps wwh -o %a 21679
flatcap · 294 weeks and 1 day ago
Nice! I wrapped it in a function for easier use: function cmdline { xargs -0a /proc/${1:-$$}/cmdline echo; } cmdline 1234
robinsonaarond · 293 weeks and 4 days ago
great that i found this forum. People here are great. Learned alot. Keep posting more
Killersmile · 6 weeks and 6 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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