Shell Programming and Scripting

#!/bin/bash
if [ $# -lt 1 ] ; then #Check there is enough command line parameters.
        exit 1
fi

cat $1 | while read i; do #Check whether there is missing file
        `[ -e $i ]`
        if [ $? != 0 ] ; then
                exit 1
        fi
done

exit 0

test1
test2
test3

./check suite.txt; echo $?

#!/bin/bash

if [ $# -lt 1 ] ; then #Check there is enough command line parameters.
        exit 1
fi

while read i
do
        `[ -e $i ]`
        if [ $? != 0 ] ; then
             exit 1
        fi
done < $1

exit 0

while read i
do
     if  [ ! -e $i ]
     then
         exit 1
     fi
done < $1

...
while read i; do
 `[ -e "$i" ]`
 if [ $? != 0 ] ; then
 exit 1
 fi
done < "$1"
...

...
while read i; do
 [ -e "$i" ] || exit 1
done < "$1"
...