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Lab 4 Filename Generation

Lab 4 Filename Generation. ICS 431 – Operating System. File Name Generating Characters. ? Matches any single character except a leading dot [ ] Defines a class of characters - Defines an inclusive range ! Negates the defined class

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Lab 4 Filename Generation

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  1. Lab 4Filename Generation ICS 431 – Operating System

  2. File Name Generating Characters ? Matches any single character except a leading dot [ ] Defines a class of characters - Defines an inclusive range ! Negates the defined class * Matches zero or more characters except a leading dot

  3. File Name Generation -- ? ? Matches any single character. $ ls –a . .. .zzrstrsturstuvrstzbbabbcyzzzayy 7A 9B 7a 12D Example $ echo ??? $ echo rst?

  4. File Name Generation – [ ] [ ] Defines a class of characters from which one will be matched. $ ls –a . .. .zz 8B 11C 4D 6B Ant Cat Dog rstrstuvbacyz Example $ echo [abc]?? $ echo [1-9] [A-Z] $ echo [!A-Z]??

  5. File Name Generation -- * • Matches zero or more characters except a leading dot (.). $ ls –a . .. .profile ab.dat abcd.dat abcdeabcde.data Example $ echo * $ echo .* $ echo .*dat $ echo *e

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