[texhax] Umasks, Permissions, and All That

Thomas Schneider schneidt at mail.nih.gov
Fri Jul 12 20:22:59 CEST 2013


> It may actually be the other way around. Using umask changes the
> system value from its default for the Terminal session

No, the system value is never changed by the user but one can set
one's own value in a shell.

Note: a Terminal is the graphical display on Mac OS X.  A shell is a
program running inside the Terminal that provides the command line. 
One can invoke another shell from a first shell.  If I'm in bash, I
can start a ksh then an sh and then (with control-d) break all of
these --- all within a single Terminal:

% bash
bash-3.2$ ksh
$ sh
sh-3.2$ exit
bash-3.2$ exit

> and the default value for personal files/folders is to inherit the
> system's value.



  Thomas D. Schneider, Ph.D.
  Senior Investigator
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research
  Gene Regulation and Chromosome Biology Laboratory
  Molecular Information Theory Group
  Frederick, Maryland  21702-1201
  schneidt at mail.nih.gov
  http://schneider.ncifcrf.gov/(current link)
  http://alum.mit.edu/www/toms (permanent link)

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