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Directory-File System Exercise

Directory-File System Exercise. Figure 44 in HtDP. Racket Primitives. Data definition (define- struct file (name size content)) (define- struct dir (name dirs files)) Corresponding constructors and accessors that are automatically generated

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Directory-File System Exercise

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  1. Directory-File System Exercise

  2. Figure 44 in HtDP

  3. Racket Primitives • Data definition • (define-struct file (name size content)) • (define-struct dir (name dirs files)) • Corresponding constructors and accessorsthat are automatically generated • make-file, file-name, file-size, file-content • make-dir, dir-name, dir-dirs, dir-files • Note, define-struct is not available in Legacy Languages => (Scheme) R5RS. So, choose the language level as Teaching Languages=>HtPD => Intermediate-level or Advanced.

  4. Additional Issues • Do not need teach packs (e.g., dir.ss) for this assignment because navigating through real Windows/UNIX directories not required. • Use secure shell ssh to log into unixapps1 and sftp to copy files into unixapps1 before executing (one of the following) turnincommand. /common/public/tkprasad/cs480/turnin-pa1  fileSys.scm /common/public/tkprasad/cs480/turnin-pa1  fileSys.rkt

  5. Function Definitions • Represent figure as EG44 • Define how-many : Number of files • Define du-dir : Disk usage (size) • Submit the version in which both the directory and the file require 1 unit of storage for holding their meta-information, and additionally, each file requires storage to hold its content, whose size has been explicitly specified. • Define find? : Determines if a file occurs in the directory tree CS680 Only • Define find : Determines list of file paths if there are multiple occurrences of a file in the directory tree

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