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Full Discussion: Isolating a specified line - awk grep or somthing else?
Top Forums Shell Programming and Scripting Isolating a specified line - awk grep or somthing else? Post 302324038 by cfajohnson on Tuesday 9th of June 2009 06:06:31 PM
Old 06-09-2009
Quote:
Originally Posted by jim mcnamara
Code:
array=( ls /media | grep -v cdrom | tr -s '\n' ' '  )


I think you meant:

Code:
array=( $(ls /media | grep -v cdrom | tr -s '\n' ' ')  )

But that is not portable. Most shells do not have arrays. (And there's no need for tr in those shells that do have arrays.)
Quote:
Code:
i=0;
while [[ $i -lt ${array[#]} ]] 
  echo "array element # $1 = ${array[i]}
  i=$(( $i + 1))
done


There's no need for any external commands:

Code:
n=1
for d in /media/*
do
  case $d in
    *cdrom*) ;;
    *) eval "drive$n=\$d"; n=$(( $n + 1 )) ;;
  esac
done

 

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LEARN ABOUT DEBIAN

printattn

MESSAGES(3)						  libbash messages Library Manual					       MESSAGES(3)

NAME

     messages -- libbash library that implements a set of functions to print standard status messages

SYNOPSIS

     printOK	 [indent]
     printFAIL	 [indent]
     printNA	 [indent]
     printATTN	 [indent]
     printWAIT	 [indent]

DESCRIPTION

   General
     messages is a collection of functions to print standard status messages - those [ OK ] and [FAIL] messages you see during Linux boot process.

     The function list:
	   printOK	    Prints a standard [ OK ] message (green)
	   printFAIL	    Prints a standard [FAIL] message (red)
	   printNA	    Prints a standard [ N/A] message (yellow)
	   printATTN	    Prints a standard [ATTN] message (yellow)
	   printWAIT	    Prints a standard [WAIT] message (yellow)

     Detailed interface description follows.

   indent
     Column to move to before printing.

     Default indent is calculated as TTY_WIDTH-10. If current tty width can not be determined (for example, in case of serial console), it
     defaults to 80, so default indent is 80-10=10

FUNCTIONS DESCRIPTIONS

   printOK [indent]
     Prints a standard [ OK ] message (green)

   printFAIL [indent]
     Prints a standard [FAIL] message (red)

   printNA [indent]
     Prints a standard [ N/A] message (yellow)

   printATTN [indent]
     Prints a standard [ATTN] message (yellow)

   printWAIT [indent]
     Prints a standard [WAIT] message (yellow)

EXAMPLES

     Run a program named MyProg, and report it's success or failure:

	      echo -n 'Running MyProg...'
	      printWAIT
	      if MyProg ; then
		      printOK
	      else
		      printFAIL
	      fi

AUTHORS

     Hai Zaar <haizaar@haizaar.com>
     Gil Ran <gil@ran4.net>

SEE ALSO

     ldbash(1), libbash(1)

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