Shell Programming and Scripting

#!/bin/ksh

set -A services "toto" "titi" "tata" "/etc/redhat-release" "tete"

check_service () {
        i=0
        while [[ $i -le "${#services[@]}" ]] && [[ rcControlRule -ne 1 ]]; do
                if [ "$(ls "${services[$i]}")" ]; then
                        rcControlRule=1
                        echo "${services[$i]}"
                else
                        rcControlRule=0
                fi
        (( i+=1 ))
        done
        return ${rcControlRule}
}

echo "Start"

check_service

echo "${rcControlRule}"

echo Done

 ./test.ksh
Start
ls: cannot access toto: No such file or directory
ls: cannot access titi: No such file or directory
ls: cannot access tata: No such file or directory
/etc/redhat-release
1
Done

if ls *.type &>/dev/null; then 
    echo "yes files are there"
    ....................
    ....................
else 
    echo "no files are not there"
    ....................
    ....................
fi

if ls ${services[$i]} &>/dev/null ; then

 ls: cannot access toto: No such file or directory

# Working
$ if ls *.pdf &>/dev/null; then echo "yes"; else echo "no";fi
yes

$ if ls *.pdfs &>/dev/null; then echo "yes"; else echo "no";fi
no

# This does not work
$ if ls *.pdf >/dev/null; then echo "yes"; else echo "no";fi
yes

$ if ls *.pdfs >/dev/null; then echo "yes"; else echo "no";fi
ls: cannot access *.pdfs: No such file or directory
no

$ if ls /etc/redhat-release &>/dev/null; then echo "yes"; else echo "no";fi
yes
$ if ls toto  &>/dev/null; then echo "yes"; else echo "no";fi
no

$ ls *.pdf -1
Customers of Old Prepaid Plans Migrated list_web.pdf
intercom hindi english web22.pdf
Introduce_prepaid_plan_Savinudi_Oct13_web7.pdf

$ arr=(pdf pdfs)
$ i=0; while [ ${#arr[*]} -gt $i ];do if ls *.${arr[$i]} &>/dev/null; then echo "yes"; else echo "no";fi;i=$((i+1));done
yes
no

set -A services "toto" "titi" "tata" "/etc/redhat-release" "tete"
i=0
while [ ${#services[*]} -gt $i ];do
if [ $(ls "${services[$i]}" 2>/dev/null | wc -l) -gt 0 ]  ; then
    echo "mycode goes here"
else 
    echo "no...some command"
fi;
((i+=1))
done

#!/bin/ksh

arg=(ksh bash)
i=0
while [ ${#arr[*]} -gt $i ]; do
        if ls "*.${arr[$i]}" &>/dev/null; then
                echo "yes"
        else
                echo "no"
        fi
        i=$((i+1))
done