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Full Discussion: Bash Question: HowTo Exit Script with User Input While Process is Running Mid-Loop?
Top Forums Shell Programming and Scripting Bash Question: HowTo Exit Script with User Input While Process is Running Mid-Loop? Post 302891406 by hilltop_yodeler on Wednesday 5th of March 2014 01:52:28 PM
Old 03-05-2014
Thanks port43! Although this method does not accomplish what I had hoped to do in terms of "listening" for user input (pressing 'q' for quit), exiting the script with CTRL+c instead will work just fine for me and I'll be perfectly happy with that. The script is working very well now thanks to your input and suggestions. Before today, I had never heard of "trap".

As a musician, I will often times use this script when trying to commit a song or a series of songs to memory. Here's the new version:

Code:
echo -n "Would you like to repeat one file (1) or many files (M)?"
read quantity
echo ""
echo ""

echo -n "Enter the number of times you would like to play the file(s):"
read num
echo ""
echo ""

if [ $quantity == "1" ]
then
  echo -n "What is the name of the file?"
  read file
  trap 'exit 1' 1 2 3 15
  for ((i=1; i <= $num; i++))
     do mplayer $file
done

elif [ $quantity == "M" ]
then
  echo -n "Enter the file type or extension (mp3 / ogg / *)"
  read ext
  trap 'exit 1' 1 2 3 15
  for ((j=1; j <= $num; j++))
     do mplayer *.$ext
done

else
  echo ""
  echo -n "Invalid entry. Please try again."
  echo ""
fi

Thanks again!
 

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LEARN ABOUT LINUX

shtool-echo

SHTOOL-ECHO.TMP(1)					      GNU Portable Shell Tool						SHTOOL-ECHO.TMP(1)

NAME

       shtool-echo - GNU shtool echo(1) extensional command

SYNOPSIS

       shtool echo [-n|--newline] [-e|--expand] string

DESCRIPTION

       shtool echo is an echo(1) style command which prints string to stdout and optionally provides special expansion constructs (terminal bold
       mode, environment details, date, etc) and newline control. The trick of this command is that it provides a portable -n option and hides the
       gory details needed to find out the environment details under option -e.

OPTIONS

       The following command line options are available.

       -n, --newline
	   By default, output is written to stdout followed by a "newline" (ASCII character 0x0a). If option -n is used, this newline character is
	   omitted.

       -e, --expand
	   If option -e is used, string can contain special "%x" constructs which are expanded before the output is written. Currently the
	   following constructs are recognized:

	   %B  switch terminal mode to bold display mode.

	   %b  switch terminal mode back to normal display mode.

	   %u  the current user name.

	   %U  the current user id (numerical).

	   %g  the current group name.

	   %G  the current group id (numerical).

	   %h  the current hostname (without any domain extension).

	   %d  the current domain name.

	   %D  the current day of the month.

	   %M  the current month (numerical).

	   %m  the current month name.

	   %Y  the current year.

EXAMPLE

	#   shell script
	shtool echo -n -e "Enter your name [%B%u%b]: "; read name
	shtool echo -e "Your Email address might be %u@%h%d"
	shtool echo -e "The current date is %D-%m-%Y"

HISTORY

       The GNU shtool echo command was originally written by Ralf S.  Engelschall <rse@engelschall.com> in 1998 for Website META Language (WML)
       under the name buildinfo. It was later taken over into GNU shtool.

SEE ALSO

       shtool(1), echo(1).

18-Jul-2008							   shtool 2.0.8 						SHTOOL-ECHO.TMP(1)
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