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UNIX in a Nutshell: System V Edition

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If variable is given, shift the words in a wordlist variable; i.e., name [2] becomes name [1] . With no argument, shift the positional parameters (command-line arguments); i.e., $2 becomes $1 . shift is typically used in a while loop. See additional example under while .


while ($#argv)      # while there are arguments
    if (-f $argv[1])  
       wc -l $argv[1]
       echo "$argv[1] is not a regular file"
    shift           # get the next argument

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