(features.info)Job Control Variables

Job Control Variables
=====================

`auto_resume'
     This variable controls how the shell interacts with the user and
     job control.  If this variable exists then single word simple
     commands without redirects are treated as candidates for resumption
     of an existing job.  There is no ambiguity allowed; if you have
     more than one job beginning with the string that you have typed,
     then the most recently accessed job will be selected.  The name of
     a stopped job, in this context, is the command line used to start
     it.  If this variable is set to the value `exact', the string
     supplied must match the name of a stopped job exactly; if set to
     `substring', the string supplied needs to match a substring of the
     name of a stopped job.  The `substring' value provides
     functionality analogous to the `%?' job id (Note: Job Control
     Basics.).  If set to any other value, the supplied string must
     be a prefix of a stopped job's name; this provides functionality
     analogous to the `%' job id.

`notify'
     Setting this variable to a value is equivalent to `set -b';
     unsetting it is equivalent to `set +b' (Note: The Set Builtin.).