Replace obsolete 'egrep' with 'grep -E'

docs/src/checkref

@@ -23,7 +23,7 @@ for F in $FILES; do
     OUT=.checklink.$LANGUAGE.$(basename $F).tmp
     rm -f $OUT
     linuxcnc-checklink --quiet --exclude "(http|https|irc)://" $F  2>&1 | tee $OUT
-    egrep -q 'List of (broken links and other issues|duplicate and empty anchors)' $OUT
+    grep -E -q 'List of (broken links and other issues|duplicate and empty anchors)' $OUT
     if [ $? -ne 1 ]; then
         BAD_LINKS=1
     fi

scripts/githelper.sh

@@ -16,7 +16,7 @@
 
 function githelper() {
     if [ -z "$1" ]; then
-        GIT_BRANCH=$(git branch | egrep '^\*' | cut -d ' ' -f 2)
+        GIT_BRANCH=$(git branch | grep -E '^\*' | cut -d ' ' -f 2)
         if [ "$GIT_BRANCH" = "(no" ]; then
             echo "'git branch' says we're not on a branch, pass one in as an argument" > /dev/null 1>&2
             return

scripts/swish

@@ -59,7 +59,7 @@ Usage:
 	    by swish is grepped for this pattern, and matching lines are
 	    printed.  By default, $b attempts to turn swish-pattern into
 	    a grep-pattern, but this only works if swish-pattern is a simple
-	    word.  For more information about grep patterns, see 'man egrep'
+	    word.  For more information about grep patterns, see 'man grep'
 EOF
 	exit 1
 }
@@ -69,7 +69,7 @@ while getopts "hRF:" opt
 do
 	case "$opt" in
 	R)	FORCEREBUILD=1 ;;
-	F)	FILEFILTER="egrep -z -e $OPTARG" ;;
+	F)	FILEFILTER="grep -E -z -e $OPTARG" ;;
 	h|?)	usage ;;
 	esac
 done
@@ -91,9 +91,9 @@ fi
 if ! [ -z "$FILEFILTER" ]; then
 	swish-e -f $SWISHINDEX -H0 -x '<swishdocpath>\0' -w "$PAT" \
 		| $FILEFILTER | makerelative \
-		| xargs -0 egrep -Hnis -e "$REGEXP"
+		| xargs -0 grep -E -Hnis -e "$REGEXP"
 else
 	swish-e -f $SWISHINDEX -H0 -x '<swishdocpath>\0' -w "$PAT" \
 		| makerelative \
-		| xargs -0 egrep -Hnis -e "$REGEXP"
+		| xargs -0 grep -E -Hnis -e "$REGEXP"
 fi

src/configure.ac

@@ -73,7 +73,6 @@ fi
 AC_SUBST([EMC2VERSION])
 
 AC_PATH_PROG(GREP, grep)
-AC_PATH_PROG(EGREP, egrep)
 
 #
 # check for pkg-config

tests/module-loading/rtapi-app-main-fails/checkresult

@@ -7,13 +7,13 @@ if [ ! -f $STDERR ]; then
 fi
 
 # Linux spelling of ERANGE
-if egrep -q 'rtapi_app_main_fails.* Numerical result out of range' $STDERR; then
+if grep -E -q 'rtapi_app_main_fails.* Numerical result out of range' $STDERR; then
     echo "loadrt found the test component, and it failed to load"
     exit 0
 fi
 
 # FreeBSD spelling of ERANGE
-if egrep -q 'rtapi_app_main_fails.* Result too large' $STDERR; then
+if grep -E -q 'rtapi_app_main_fails.* Result too large' $STDERR; then
     echo "loadrt found the test component, and it failed to load"
     exit 0
 fi

tests/module-loading/shared-test.sh

@@ -3,7 +3,7 @@
 halrun setup.hal > hal-output 2>&1
 RESULT=$?
 
-NUM_PINS=$(cat hal-output | egrep $(cat PIN_NAME_REGEX) | wc -l)
+NUM_PINS=$(cat hal-output | grep -E $(cat PIN_NAME_REGEX) | wc -l)
 
 if [ $RESULT -ne $(cat RESULT) ]; then
     exit 1