> On 5 Nov 2014, at 12:54 am, Chet Ramey <chet.ra...@case.edu> wrote: > > On 11/3/14 5:08 PM, Graham Jones wrote: >> These are for: >> bash --version >> GNU bash, version 4.3.30(1)-release (x86_64-apple-darwin14.0.0) > > This trace looks pretty reasonable. Maybe you could temporarily move your > history file to some other name and see if you can reproduce this behavior > starting fresh with an empty history file. As you may have seen from the other email, the history file is relatively small. I did just remove it and start afresh, and the issue still occurs. Whilst attempting to reproduce it, I noticed that is doesn’t reoccur immediately. In my first test, I deleted the history file and closing that session (the only one). When I created a single terminal session, I could su to root and hit return a large number of times without it reproducing the error. I need created another terminal session and (without suing) after issue just a single command, the next command on the root terminal exhibited the behaviour. I retried a similar experiment, again after removing the history file, and again it wasn’t immediately reproducible. This time I didn’t create a second session but left the terminal along for 3 or 4 minutes. When I next entered a command the behaviour has returned. In both cases the line count in $HISTFILE was low = ~40.
Now after performing these to experiments I just tried to create a new session and found my $HISTFILE owned by root (or at least permission denied, I didn’t actually check the file mode and owner before chmoding it). This seems strange given I never log in as root only su so presumably the first command executed must always be by my own user. After chmoding it, I notice this: graham@zebedee:~$ wc -l $HISTFILE 500001 /Users/graham/.bash_history I have obviously not entered that many commands! Immediately after I go to check the contents and it’s owned by root again graham@zebedee:~$ wc -l $HISTFILE wc: /Users/graham/.bash_history: open: Permission denied graham@zebedee:~$ l $HISTFILE -rw------- 1 root staff 1500000 4 Nov 21:36 /Users/graham/.bash_history graham@zebedee:~$ ps aux |grep bash graham 99600 0.0 0.0 2432772 648 s000 S+ 9:40pm 0:00.00 grep bash graham 99555 0.0 0.5 2492596 39076 s000 S 9:36pm 0:00.49 -bash But yet there is only my bash running non-priveledge. Now I was expecting a hole in the file, but when I finally get to see the contents, I have 500,000 ls commands in there (one of my test commands from above) graham@zebedee:~$ wc -l $HISTFILE wc: /Users/graham/.bash_history: open: Permission denied graham@zebedee:~$ sudo chown graham $HISTFILE Password: graham@zebedee:~$ sort $HISTFILE | uniq -c | sort -n 1 sudo chown graham $HISTFILE 1 vi $HISTFILE 500000 ls > > Chet > > -- > ``The lyf so short, the craft so long to lerne.'' - Chaucer > ``Ars longa, vita brevis'' - Hippocrates > Chet Ramey, ITS, CWRU c...@case.edu http://cnswww.cns.cwru.edu/~chet/