UNIX for Dummies Questions & Answers

 delete file1 file2 file3 file4 file5

#!/bin/bash
# Program: myrm

if [ "$#" -le 0 ]
then
        echo "Not enough arguments"
        echo "Usage: myrm [arg1] [arg2] etc..."
        exit 1
fi

MAXFILES=""
FILECOUNT=$(ls | wc -l)

if [ -n "$MAXFILES" ]
then

        if [ "$FILECOUNT" = "$MAXFILES" ]
        then
                for i
                do
                        rm -rf $1
                        shift
                done

        elif [ "$MAXFILES" > "$FILECOUNT" ]
        then
                echo "Would you like to delete these files?"
                read choice

                case "$choice"
                in
                        y)      for i; do rm -rf $1; shift; done;;
                        n)      echo "Thank you, have a nice day";;
                        *)      echo "Invalid choice"
                                exit 2;;
                esac
        fi

elif [ -z "$MAXFILES" ]
then
        for i in $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10}
        do
                rm -rf $1
                shift
        done
        exit 0


fi

#!/bin/bash
# Program: myrm

if [ -z "$MAXFILES" -a "$#" -ge 1 ]
then
        for MAXFILES in $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10}
        do
                echo "deleted$MAXFILES"
                shift
        done
        exit 1
fi

if [ -n "$MAXFILES" -a "$#" -ge 1 ]
then
        MAXFILES="$*"
        rm -rf $MAXFILES
fi

$ MAXFILES=56 ./myrm f1 f2 f3 f4
# then it deletes the 4 files because they are less than the amount specified in MAXFILES.
or
$ MAXFILES= ./myrm f1 f2 f3 f4

blah blah blah

#!/bin/bash
# Program: myrm

if [ "$#" -le 0 ]
then
        echo "Not enough arguments"
        echo "Usage: myrm [arg1] [myarg2] etc.."
fi

if [ -z "$MAXFILES" ]
then
        for i in $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10}
        do
                rm -rf $i
                shift
        done
        exit 1
fi

x=$(ls | wc -l)

if [ -n "$MAXFILES" -a "$#" -lt "$MAXFILES" ]
then
        rm -rf $*
else
        echo "Remove $# files? (y/n)"
        read choice

        case "$choice"
        in
                y)      rm -rf $*;;
                n)      echo "Ok, I will not delete any files then";;
                *)      echo "Invalid option"
                        exit;;
        esac
fi

$ ls
f1  f10  f11  f12  f13  f14  f15  f2  f3  f4  f5  f6  f7  f8  f9  myrm
$ MAXFILES= ./myrm f*
$ ls
f5  f6  f7  f8  f9  myrm
# MAXFILES is set to null and deletes up to 10 files even though I specified more.

$ MAXFILES=2 ./myrm f1 f2 f3 f4 f5
Remove 5 files? (y/n)
y
$ ls
f10  f11  f12  f13  f14  f15  f6  f7  f8  f9  myrm
# MAXFILES is set to 2 but I specified 5 files to delete. So it asks me y/n to confirm.

$ MAXFILES=5 ./myrm f1 f2 f3
$ ls
f10  f11  f12  f13  f14  f15  f4  f5  f6  f7  f8  f9  myrm
$ 
# MAXFILES is set to 5 and since I have specifed less than 5 arguments, it just does it without question.