Bug #20989
ps returns truncated command line in dune/ArtSupport/DuneToolManager.cxx
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Description
In n dune/ArtSupport/DuneToolManager.cxx,
this line
sscom << "ps -fp " << pid << " >" << sftmp;
is used to determine the command line and arguments. Problem is, the ps command truncates its output based on the value of the COLUMNS environment variable, leaving a partial string of arguments. This is becoming more common with /cvmfs pathnames.
History
#1 Updated by Tingjun Yang over 2 years ago
David, would you fix this?
#2 Updated by David Adams over 2 years ago
What value do we need for COLUMNS?
#3 Updated by David Adams over 2 years ago
When I redirect "ps -fp", e.g. when I run
ps -fp 59986 >tmp.tmp
on dunegpvm or my desktop, I do not see a limit from COLUMNS. I do if I do not redirect, I do see the truncation.
Where are you seeing a problem?
#4 Updated by Thomas Junk over 2 years ago
If I run Jason's example (see the slack thread under larsoft), and put a breakpoint in DuneToolManager.cxx after the temporary file is created with the output of ps, I see output truncated at 80 characters.
<dunegpvm08.fnal.gov> cat /dune/data/users/trj/dumptest/tmpproc29642.tmp
UID PID PPID C STIME TTY TIME CMD
trj 29642 29640 3 11:22 ? 00:00:05 /cvmfs/larsoft.opensciencegrid.o
#5 Updated by Thomas Junk over 2 years ago
Suggested bugfix:
sscom << "ps -fwwp " << pid << " >" << sftmp;
#6 Updated by David Adams over 2 years ago
- Status changed from New to Feedback
I have not been able to reproduce the problem but I added the "ww" argument and it causes me no problem.
I will wait a couple day and close this if there are no complaints from Jenkins.