Question

Your task is to create a bash shell script that is able to backup all the C++ program files in your current directory. The algorithm is as follows: Prompt the user to enter a backup directory name. If the backup directory does not exist in the current directory, then create the backup directory. For each .cpp file in the current directory, If there have been changes to the file since the last backup or no copy exists in the backup directory, then copy the current .cpp file to the backup directory and print a message that the file has been backuped. Otherwise, no copy will be made, and print a message that the file is the latest. Deliverables:

1. The code of bash shell script hw1.txt. The shell script file should be hw1.sh, but .sh files can not uploaded to Blackboard, please revise the extension as .txt and then upload it to Blackboard.
2. The script log file hw1log.txt showing the test cases outlined below Test Cases captured in hw1log.txt : 1. Start by removing your backup directory (rm -r backup) 2. Ensure that there are some .cpp files in the current directory
3. Show the directory using ls -l
4. Run the backup script file hw1.sh several times as specified below: Type "backup", to create a backup directory ls -l backup Run your backup script file hw1.sh ls -l backup Append to all the files and rerun your backup script file hw1.sh an good way to append is to type: echo "something" >> file.cpp Append to one file and rerun your backup script file hw1.sh

Answer 1

backup() {

read dirname;

if [[ whereis . /`$dirname` 2> sterr.exe]]

then

mkdir $dirname

for f in . / *.cpp

do

cp f "path_to_dirname"

echo "file backup complete"

}

backup( )

Step-by-step explanation:

The bash script above is used to backup C++ source files in a directory to a backup directory which is created if it does not exist, and copy's each .cpp file to backup, then sends a message to declare its completion.