Name: dm26566 Date: 02/09/2001


There are a series of checks for validting the contents of MAKEFLAGS. They
could be simplified:

 To check if $MAKEFLAGS contains a space-delimited 'e' or 'i' or 'I' (you
can generalize from there):

        echo "$MAKEFLAGS" | egrep -c '(^| )[eiI]( |$)'
                                       ^^^ matches start of line or a space
                                                 ^^^ space or end of line

The "-c" flag causes egrep to return a count of the number of matching
lines on stdout. It'll be 0 if nothing matches, so:

        if [ `echo ...` -ne 0 ]; then echo Bad boy; fi

egrep has an option to supress the output, which is useful for
conditional tests in shell scripts. /bin/egrep uses "-s" while
GNU egrep uses "-q". So you could use this, but you'd need to
be careful in a multi-platform script to see who uses what.


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