Shell Programming and Scripting

ls=~/bin/my-ls
$ls /

#!/usr/bin/env bash

# @(#) Example-2        Demonstrate sample statements for diagnosis.

LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
em() { pe "$*" >&2 ; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C

FILE=${1-data1}

p=$( basename $0 ) t1="$Revision: 1.14 $" v=${t1//[!0-9.]/}
[[ $# -gt 0 ]] && [[ "$1" =~ -version ]] &&  { echo "$p (local) $v" ; exit 0 ; }

[[ $# -le 0 ]] || echo1 Hi

cat $FILE | cat1 | cat2 ; cat3

v1="a|b\
|c|\
d"

./scramble1

~/scramble2

$HOME/scramble3

x=`cmd1`

y=$( cmd2 )

if [ stuff ] ; then other stuff; fi

if [ stuff0 ]
then
  other stuff
fi

if [[ modern stuff ]] ; then other stuff; fi

while [ repetitive exp ] ; do stuff ; done

while [[ more exps ]] ; do stuff ; done

if grep1 ; then stuff1 ; done

while gawk2 ; do stuff2 ; done

case $item in:
        a) a=1 ;;
        (b) case1 ;;
esac

db " End of script."

exit 0

$ ./p1 example-2
/home/drl/scramble3: not found
./scramble1: not found
basename is /usr/bin/basename
case1: not found
cat is /bin/cat
cat1: not found
cat2: not found
cat3: not found
cmd1: not found
cmd2: not found
db is a function defined in this script.
echo1: not found
exit is a special shell builtin
export is a special shell builtin
other: not found
pe is a function defined in this script.
printf is a shell builtin
stuff1: not found
stuff2: not found
/home/drl/scramble2: not found