---------- Post updated at 10:19 AM ---------- Previous update was at 02:04 AM ----------
Hi
I am able to solve the issue of getting the password in '*' and displaying it. But I landed up in another issue. When I press backspace it does not go back and erase the character but instead it puts a '[]' type
Code:
password:********
the password is wel[]come
In the above I typed a backspace near letter 'l' but it has put a box like symbol.
But this problem goes if I type ^H character
Code:
[ncoadmin@netcool ~]$ ./a.sh
password:******
the password is wecome
The modified code looks like this
Code:
#!/bin/sh
exec 4>/dev/tty
function getpass
{
typeset prompt=$1
typeset backspace=$(echo -en \\b\\c)
typeset enter=$(echo -e \\r\\c)
typeset savesetting=$(stty -g)
typeset keystroke password n i reading result
n=0
echo -e "${prompt}"\\c >&4
stty -echo -icrnl -icanon min 1 time 0
reading=1
while ((reading)) ; do
keystroke=$(dd bs=1 count=1 2>/dev/null)
case $keystroke in
$enter)
reading=0
;;
$backspace)
if ((n)) ; then
echo -e "${backspace} ${backspace}"\\c >&4;
#stty erase '^H'
((n=n-1))
fi
;;
*)
echo -e \*\\c >&4
data[n]=$keystroke
((n=n+1))
esac
done
stty "$savesetting"
echo -e >&4
result=""
i=0
while ((i<n)) ; do
result="${result}${data[i]}"
((i=i+1))
done
echo -e $result
return 0
}
final=$(getpass "password:")
echo -n the password is $final
exit 0
Please let me know what should I modify so that when the user presses the backspace I should erase a character
I tried to modify and run the code but it does not seem to work. The backspace works only if I press the ctrl+H key only. It does not recognize when I press the 'backspace' key.
Just wanted to know what else should I modify? So, that the backspace key works.
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