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Full Discussion: Control cursor position also at bottom of window
Top Forums Shell Programming and Scripting Control cursor position also at bottom of window Post 303043711 by Ralph on Tuesday 4th of February 2020 08:41:57 PM
Old 02-04-2020
Quote:
Originally Posted by wisecracker
Hi Ralph..
Is this what you are trying to do?
Code:
#!/bin/bash
# Linux Mint 19, default bash terminal.
clear
echo ""
echo ""
printf "%b" "This is a test line.\033[s\n"
sleep 2
echo ""
echo ""
printf "%b" "\033[u\033[1A\n"
 echo "We are here.         "

This is what I do - the output of my script:
Code:
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
Do you wish to continue? [Y|n] z

When a user enters an answer other than Y, y, N, n or <Enter> - for example 'z' above - then the cursor is supposed to stay where it is until an acceptable answer comes.
That has to work everywhere on the screen.

The problem I had was that the carriage return moved the cursor to the next line, one line below the question. I first fixed it for everywhere except the last line of the window and that's when I posted my original question.

This version works for me now:
Code:
#!/bin/bash

function askYesOrNo {
        printf "\e[1;31;47m$1 [Y|n]\e[0m "      # print $1 in color
        printf "\e[s"                           # save cursor x-pos

        while true ; do
                read answer
                if [ -z "$answer" ] ; then
                        return 0
                elif [ "$(tr -d "NnYy" <<< $answer)" != "$answer" ] ; then
                        break
                fi

                # How many lines in this window?
                LINES=$(tput lines)

                # find cursor y-position ( line number )
                printf "\e[6n" ; read -sd R POS
                CURPOS=${POS#*[}; CUR_Y=${CURPOS%;*}

                if [ "$CUR_Y" -eq "$LINES" ] ; then
#                       printf "\e[u\e[1A\e[K" 
                        printf "\e[u\eM\e[K"
                else
                        printf "\e[u\e[K"
                fi
        done
        if [ "${answer^}" == "Y" ]; then
                return 0
        fi
        return 1
}

for (( i = 100, max = 110; i <= max; i++ )) ; do
        printf " %d\n" $i
        if [ $i -eq $max ] ; then
                if askYesOrNo "Do you wish to continue?" ; then
                        (( max += 10 ))
                fi
        fi
done

Could be condensed a bit but this is easier to read.
It works here. Does it work on your system?
 

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LEARN ABOUT DEBIAN

srvsearch

RULI(1) 						      General Commands Manual							   RULI(1)

NAME

       srvsearch, sync_srvsearch, smtpsearch, sync_smtpsearch, httpsearch, sync_httpsearch, ruli-getaddrinfo
       - Sample programs for RULI Library (RFC 2782)

SYNOPSIS

       echo _service._protocol.nongnu.org | ruli-getaddrinfo
       echo _service._protocol.nongnu.org | srvsearch [ options ]
       echo _service._protocol.nongnu.org | sync_srvsearch [ options ]
       echo nongnu.org | smtpsearch [ options ]
       echo nongnu.org | sync_smtpsearch [ options ]
       echo nongnu.org | httpsearch [ options ]
       echo nongnu.org | sync_httpsearch [ options ]

DESCRIPTION

       This manual page documents briefly sample programs for the ruli(3) library.

       ruli is a library aimed at querying DNS SRV resource records.

OPTIONS

       For http searches, one can force the port number by specifying it as the first option.

       search Use the resolver search list defined in '/etc/resolv.conf'.

       need_ra
	      Require RA (Recursion Available) bit in the name server answer.

       noinet Don't fetch IPv4 addresses.

       noinet6
	      Don't fetch IPv6 addresses.

       uri_port
	      Assume the specified default port was forced by the user-supplied URI.

       nowalk Don't search addresses missing from the name server answer.

       nofall Don't launch fallback queries for addresses, if the SRV query fails.

       nosort6
	      Don't sort the address list to give preference to IPv6 addresses.

EXAMPLES

       echo _telnet._tcp.nongnu.org | ruli-getaddrinfo
       echo _smtp._tcp.nongnu.org | srvsearch search
       echo _smtp._tcp.nongnu.org | sync_srvsearch search noinet6
       echo nongnu.org | smtpsearch noinet
       echo nongnu.org | sync_smtpsearch nowalk nofall
       echo nongnu.org | httpsearch noinet6
       echo nongnu.org | sync_httpsearch 80

SEE ALSO

       ruli(3)

AUTHOR

       This manual page was written by Everton da Silva Marques <evertonsm@yahoo.com.br>.

								 October 08, 2004							   RULI(1)
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