Merge pull request #3304 from BsAtHome/fix_shellcheck-cd-exit

Fix more shellcheck problems

configs/apps/gladevcp/animated-backdrop/animated-backdrop.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./cairodraw.py ./cairodraw.ui

configs/apps/gladevcp/by-widget/combobox.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u combobox.py combobox.ui

configs/apps/gladevcp/by-widget/combobox_manual_list.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./combobox_manual_list.py ./combobox_manual_list.ui

configs/apps/gladevcp/by-widget/radiobutton.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./radio.py ./radio.ui

configs/apps/gladevcp/by-widget/sourceview.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./sourceview.py ./sourceview.ui

configs/apps/gladevcp/by-widget/spinbutton.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u spinbutton.py spinbutton.ui

configs/apps/gladevcp/class-callback/class_callback.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./class_callback.py -H ./class_callback.hal ./class_callback.ui

configs/apps/gladevcp/colored-label/coloredlabel.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./coloredlabel.py -H ./coloredlabel.hal ./coloredlabel.ui

configs/apps/gladevcp/complex/complex.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./complex.py -H ./complex.hal ./complex.ui

configs/apps/gladevcp/glade-manual.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo ./glade-manual.ui

configs/apps/gladevcp/gladevcp-test.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo ./gladevcp-test.ui

configs/apps/gladevcp/helloWorld/helloworld.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -H ./hw.hal ./hw.ui

configs/apps/gladevcp/mdi-command-example/owordsub.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo ./owordsub.ui

configs/apps/gladevcp/mdi-command-example/speed.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo ./speed.ui

configs/apps/gladevcp/mdi-command-example/whoareyou.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo ./whoareyou.ui

configs/apps/gladevcp/simple-callback/simple-callback.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./simplecallback.py ./simplecallback.ui

configs/apps/gladevcp/templates/classhandler.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./classhandler.py ./button.ui

configs/apps/gladevcp/templates/classhandler_persistent.demo_notworking

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./classhandler_persistent.py  -U debug=2 -U "print 'debug=%d' % debug"  ./button.ui

configs/apps/gladevcp/templates/functionhandler.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 gladevcp_demo -u ./functionhandler.py ./button.ui

configs/apps/halrun/halrun.demo

@@ -1,11 +1,12 @@
 #!/bin/bash
 
-prog=$(basename $0)
+prog=$(basename "$0")
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
 HALFILE="$thisdir"/help.hal
 
-cd ;# so user can use halcmd 'save' to create a file
+# Don't care if cd succeeds. Just so user can use halcmd 'save' to create a file in $HOME
+cd || true
 
 function popup () {
   msg="$*"
@@ -21,9 +22,9 @@ EOF
 } ;# popup
 
 
-[ X"$TERM" = Xdumb ] && TERM=xterm
-[ -x "$(which $COLORTERM)" ] && TERM=$COLORTERM
-[ -z $TERM ] && TERM=xterm
+[ "$TERM" = "dumb" ] && TERM=xterm
+[ -x "$(which "$COLORTERM")" ] && TERM=$COLORTERM
+[ -z "$TERM" ] && TERM=xterm
 
 # wip: xterm is well-behaved, some other terminals are not
 # for now: force to xterm
@@ -33,11 +34,11 @@ REALTIME=$(linuxcnc_var REALTIME)
 # make sure TERM uses the expected halrun (rip or install)
 HALRUN=$(which halrun)
 
-if [ ! -z "$debug" ] ; then
-  echo COLORTERM=$COLORTERM
-  echo TERM=$TERM
-  echo HALRUN=$HALRUN
-  echo REALTIME=$REALTIME
+if [ -n "$debug" ] ; then
+  echo "COLORTERM=$COLORTERM"
+  echo "TERM=$TERM"
+  echo "HALRUN=$HALRUN"
+  echo "REALTIME=$REALTIME"
 fi
 
 if $REALTIME status >/dev/null ; then
@@ -51,7 +52,7 @@ fi
 # terminate any other halrun instance:
 $HALRUN -U >/dev/null 2>&1
 
-if [ X"$TERM" = Xxterm ] ; then
+if [ "$TERM" = "xterm" ] ; then
   $TERM -geometry 80x40 \
         -sb \
         -fg black -bg ivory2 \

configs/apps/xhc-hb04/xhc-hb04-layout1.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 ./xhc-hb04.sh layout1

configs/apps/xhc-hb04/xhc-hb04-layout2.demo

@@ -2,6 +2,6 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 ./xhc-hb04.sh layout2

configs/apps/xhc-hb04/xhc-hb04.demo

@@ -2,7 +2,7 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 # use default layout
 ./xhc-hb04.sh

configs/apps/xhc-hb04/xhc-hb04.sh

@@ -2,14 +2,14 @@
 
 thisfile=$(readlink -f "$0")
 thisdir=$(dirname "$thisfile")
-cd "$thisdir"
+cd "$thisdir" || { echo "E: Could not change directory to '$thisdir'"; exit 1; }
 
 LAYOUT=${1:-""}
 
-[ -x "$(which $COLORTERM)" ] && TERM=$COLORTERM
-[ -z $TERM ] && TERM=xterm
+[ -x "$(which "$COLORTERM")" ] && TERM="$COLORTERM"
+[ -z "$TERM" ] && TERM=xterm
 # when invoked from Application menu and RIP, may have TERM=dumb
-[ x"$TERM" = xdumb ] && TERM=xterm
+[ "$TERM" = "dumb" ] && TERM=xterm
 
 XHC_HB04=$(which xhc-hb04)
 HALLIB_DIR=$(linuxcnc_var HALLIB_DIR)
@@ -20,7 +20,7 @@ case $LAYOUT in
 esac
 dashI="-I $CFG"
 
-if [ ! -z "$debug" ] ; then
+if [ -n "$debug" ] ; then
   echo "COLORTERM=$COLORTERM"
   echo "TERM=$TERM"
   echo "XHC_HB04=$XHC_HB04"

configs/sim/axis/gladevcp/set-param-from-ini.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-cd $(dirname $::argv0)
+cd "$(dirname "$0")" || { echo "E: Could not change directory to '$(dirname "$0")'"; exit 1; }
 
 gladevcp -u ./meter_scale.py ./meter_scale.ui &
 

scripts/hal_demo

@@ -18,7 +18,7 @@
 #    
 # Copyright (c) 2004-2009 All rights reserved.
 #*******************************************************************/
-if [ ! $1 ] ; then
+if [ -z "$1" ] ; then
     echo "Usage:  scripts/hal_demo <demo_name>"
     echo "Run from the emc2 directory only"
     # print the list of demos
@@ -28,7 +28,7 @@ fi
 #
 # the first demo isn't a real demo - it simply lists all the demos
 #
-if [ $1 = list ] ; then
+if [ "$1" = "list" ] ; then
     echo "Available demos are:"
     echo "  list - prints this list"
     echo "  load - loads hal core modules"
@@ -44,10 +44,10 @@ fi
 #
 # here is the "load" command
 #
-if [ $1 = load ] ; then
+if [ "$1" = "load" ] ; then
     # load the rtos and rtapi
     if ! scripts/realtime start ; then
-        exit -1
+        exit 1
     fi
     # done
     echo "RTAPI core loaded"
@@ -56,12 +56,12 @@ fi
 #
 # here is the "unload" command
 #
-if [ $1 = unload ] ; then
+if [ "$1" = "unload" ] ; then
     # unload any left-over modules
     bin/halcmd unloadrt all
     # unload the rtos and rtapi
     if ! scripts/realtime stop ; then
-        exit -1
+        exit 1
     fi
     # done
     echo "RTAPI core unloaded"
@@ -71,17 +71,19 @@ fi
 # We're almost ready for the real demos, first we must
 # make sure the rtapi core is loaded
 #
-HAL_LIB_STR=`/sbin/lsmod | awk '{print $1}' | grep -x hal_lib `
-if [ ! "$HAL_LIB_STR" ] ; then
+HAL_LIB_STR=$(/sbin/lsmod | awk '{print $1}' | grep -x hal_lib)
+if [ -z "$HAL_LIB_STR" ] ; then
     echo "All of the demos require the RTAPI and HAL_LIB modules"
     echo "to be loaded.  Use 'hal_demo load' to load them."
-    exit -1
+    exit 1
 fi
 #
 # The first demo: "parport1" simply tests the parallel port
 # this one is a step by step, tutorial/intro to HAL concepts
 #
-if [ $1 = parport1 ] ; then
+# Don't care about read mangling backslashes, nothing read is used
+# shellcheck disable=SC2162
+if [ "$1" = "parport1" ] ; then
     echo "(Comments that are part of the demo are in parenthesis.)"
     echo "(This demo echos its commands to the screen so you can"
     echo " see what each step does.  Echoed commands start with '$')"
@@ -206,7 +208,9 @@ fi
 # and halmeter.
 # this one is also a step by step tutorial
 #
-if [ $1 = siggen ] ; then
+# Don't care about read mangling backslashes, nothing read is used
+# shellcheck disable=SC2162
+if [ "$1" = "siggen" ] ; then
     echo "(Comments that are part of the demo are in parenthesis.)"
     echo "(This demo echos its commands to the screen so you can"
     echo " see what each step does.  Echoed commands start with '$')"
@@ -288,7 +292,9 @@ fi
 # using siggen as a signal source.
 # this one is also a step by step tutorial
 #
-if [ $1 = scope ] ; then
+# Don't care about read mangling backslashes, nothing read is used
+# shellcheck disable=SC2162
+if [ "$1" = "scope" ] ; then
     echo "The first part of this demo is identical to the siggen"
     echo "demo.  Hit enter to get started"
     read
@@ -400,5 +406,5 @@ fi
 #
 echo "Sorry, there is no demo called '$1'"
 scripts/hal_demo
-exit -1
+exit 1
 

scripts/make-docs-pdf-index

@@ -9,19 +9,23 @@ set -e
 # --show-toplevel` because when building from dsc we don't have a
 # git repo.
 TOPLEVEL=${PWD}/..
-cd ${TOPLEVEL}/docs
+cd "${TOPLEVEL}"/docs
 
-TITLE="LinuxCNC PDF docs ($(cat ${TOPLEVEL}/VERSION))"
+TITLE="LinuxCNC PDF docs ($(cat "${TOPLEVEL}"/VERSION))"
 
 rm -f index.html
 
-echo "<html>" >> index.html
-echo "<head><title>${TITLE}</title></head>" >> index.html
-echo "<body><h1>${TITLE}</h1><p>" >> index.html
+{
+    echo "<html>"
+    echo "<head><title>${TITLE}</title></head>"
+    echo "<body><h1>${TITLE}</h1><p>"
+} >> index.html
 
-for F in $(ls -1 *.pdf | sort); do
+for F in $(ls -1 ./*.pdf | sort); do
     echo "    <a href=\"${F}\">$F</a><br>" >> index.html
 done
 
-echo "</body>" >> index.html
-echo "</html>" >> index.html
+{
+    echo "</body>"
+    echo "</html>"
+} >> index.html