2016-12-09



In the attempt to finally switch over to FreeBSD, I began reading
the FreeBSD handbook.  [0] It's pretty interesting to read.

Section 3.8 (Daemons, Signals, and Killing Processes) provided  a
nice side note:

     Why Use /bin/kill?: Many shells provide the  kill  com-
     mand  as  a  built  in command; that is, the shell will
     send  the  signal   directly,   rather   than   running
     /bin/kill.  This  can  be  very  useful,  but different
     shells have a different syntax for specifying the  name
     of  the signal to send. Rather than try to learn all of
     them, it can be simpler just to use the  /bin/kill  ...
     command directly.

If this is the result, then why are shells adding such  commands?
To achieve some time performance goals they increase the incompa-
tibility and even the documentation.

In this particular case, however,  the  shell  builtin  has  some
sense,  because you may not be able to invoke /bin/kill to remove
a fork bomb, whereas the builtin works without the need to fork a
process on its own.


[0]  https://www.freebsd.org/doc/en/books/handbook/


http://marmaro.de/lue/        markus schnalke <meillo@marmaro.de>