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Full Discussion: Bash script won't run because hardware won't produce display
Top Forums UNIX for Beginners Questions & Answers Bash script won't run because hardware won't produce display Post 303036493 by MadeInGermany on Friday 28th of June 2019 01:39:43 PM
Old 06-28-2019
The following shell script emulates zenity on a console device.
Code:
#!/bin/bash

if [ -n "$DISPLAY" ] && xdpyinfo >/dev/null 2>&1
then
  graphics=1
else
  graphics=
fi

# a wrapper for zenity that does console I/O if no graphics
dialog(){
  if [ -n "$graphics" ]
  then
    zenity "$@"
    return
  fi
  do_text= text= do_yes_exit=
  for arg
  do
    if [ -n "$do_text" ]
    then
      text=$arg
      do_text=
    else
      case $arg in
      (--text) do_text=1;;
      (--question) do_yes_exit=1;;
      esac
    fi
  done
  read -p "$text: " input
  if [ -z "$do_yes_exit" ]
  then
    echo "$input"
    return
  fi
  case $input in
  ([Yy]*) return 0;;
  esac
  return 1
}

VER=$(
  dialog --entry --text "Please enter the ACG pgm number:" --title "Version Entry"
)

if [ -z "$VER" ]; then
  echo "ERROR: Version entry was not provided."
  exit 1
fi

case $VER in
([0-9][0-9][0-9][0-9])
;;
(*)
  dialog --question --text "'$VER' does not appear to be a
valid version string.

Continue anyway?"
;;
esac

if [ $? -ne 0 ]
then
  echo "ERROR: Invalid version entry."
  exit 1
fi

echo "$VER" > /etc/acg-oe-pgm

This User Gave Thanks to MadeInGermany For This Post:
yelirt5
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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