Any ideas?


0 /aWorking/Zsh/Source/Wk 2 % . test1; print -r -- $(( srand32() ))
srand32:4: command not found: sysread
4

0 /aWorking/Zsh/Source/Wk 2 % exit

0 /aWorking/Zsh/Source/Wk 1 % . test1; print -r -- $(( srand32() ))
3551593729

0 /aWorking/Zsh/Source/Wk 1 % zsh -f
b6-12-Deb12b# . test1; print -r -- $(( srand32() ))
srand32:4: command not found: sysread
4
b6-12-Deb12b# exit

0 /aWorking/Zsh/Source/Wk 1 % . test1; print -r -- $(( srand32() ))
2230494374

... for some unknown reason one of my open shells can find sysread while 
others can't.  I use hibernate, so the OK shell has been open for far 
too long to digress as to which commands might have put it into a 
friendly mood as to sysread.  How on earth do I figure this out?  
Printing out all my variables, there's dozens of differences, but there 
always are.  Any hot prospects? I can't think where I'd even begin.  How 
can a builtin ever not be found? I know sometimes one 'level' of command 
can mask another, like a function 'sysread' might mask the builtin, but 
that's not the case here.  It's not disabled.  Nothing else seems to be 
broken or missing.  No idea.