script

Name Change

1. Create a script in your Lab05 folder named namechange. Create some files with common errors (spaces in the filename, a misspelling, etc.). The final script will run as follows: namechange -f find -r replace filename

2. Use getopts to read in options and do actions based on arguments. getopts should support the following options in the OPTSTRING

· -h

· call printHelp function and exit script

· -f

· option followed by argument specifying pattern to find in the filename

· -r

· option followed by argument specifying what to replace the found pattern with in the filename

· \?

· use as case when option is not part of OPTSTRING

· call printHelp and exit script

· there are getopts demos linked in resources, as well as in this folder

· getopts-basics.sh

· cfgetopts.sh

3. Create a function called printHelp. printHelp should output the following:

Usage: namechange -f find -r replace "string to modify"

-f The text to find in the filename

-r The replacement text for the new filename

4. If no filename was provided OR if filename does not exist:

· Output User must provide valid filename

· Call the printHelp function

5. Using argument in field filename, find the pattern to be replaced and replace it with the pattern requested using sed

· Hint: you may just want to have sed use the -E option

6. Rename the file.

# Sample runs of working script

$ bash namechange -h

Usage: namechange -f find -r replace filename

-f The text to find in the filename

-r The replacement text for the new filename

$ bash namechange -f "\s" -r "-" "hello world.md"

Renamed "hello world.md" to hello-world.md

$ bash namechange -f "er+" -r "error" spellingerrrr.txt

Renamed spellingerrrr.txt to spellingerror.txt

· Resources

· bash-hackers - getopts  tutorial

· assertnotmagic - breaking down how getopts works

· sed  with string, not input file

· linuxize - functions

- Bulk Renamer

This builds on the script created for Part 1. Since the core is similar, I would cp this to a new script named bulkrenamer.

1. Download and run one of the create files scripts to generate some dummy files for this part.

· createfiles.sh  will just create 30 files in the directory you run it from (10 of each error type below)

· cfargs.sh  will let you create a number of files with the error type of your choice (spaces or spelling) in the directory you specify

· cfgetopts.sh  will let you do the same as cfargs.sh, but with options

· Errors in these file names that can be corrected with a script:

· jpg is misspelled as jgp

· spaces in file names that could be replaced with -

· files with foo in them need to become bar

2. The script will run as: bulkrenamer -f find -r replace FILES_TO_RENAME*

3. For each file given (or all files in a given folder), rename according to the find / replace arguments provided.

· Resources

· linuxize - for loops