Comment 3 for bug 151440

copied text from mentioned blog:

July 3, 2008

And now I'm remembering why replacing the command line utilities out of Ubuntu is so vital to getting a reliable build:

    tee: standard output: Resource temporarily unavailable
    tee: write error

The forkbomb script pipes the output of the build through "tee". If the xterm it's writing to ever gets scheduled slowly enough for the output pipe to fill up and cause a short write, tee _exits_. The busybox version of tee IS NOT THAT STUPID.

Grrrr.

Also, User Mode Linux has developed strange new bugs circa 2.6.25, and if you run it from a shell script and it gets a kernel panic, it sends a kill signal to every process in it session, which takes down the shell script running it. Meaning without toybox's oneit (to shut it down cleanly), I have to run UML under setsid (and then reset the tty afterwards) or else the shell script aborts when UML exits. (Even if I run it in a subshell.)

Implemented tee in toybox and added that to the start of my $PATH while doing the RECORD_COMMANDS forkbomb. (Yeah, I could have just used the busybox version, but it was an excuse to add a small simple command to toybox. I still need to add a test suite for tee.)