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accepting passwords in shell programming

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# 1  
Old 08-12-2011
accepting passwords in shell programming
how do i accept a password like input through keyboard using shell script?
i dont know the command for doing so.
# 2  
Old 08-12-2011
You'd like to hide the input when its typed? With the stty command you can change the terminal settings.
Code:
echo "Enter password:"
savestty=$(stty -g)
stty -echo 
read input_passwort
stty "$savestty"

# 3  
Old 08-12-2011
cero, is there a need for stty -g? stty -echo before the read and stty echo after, should work fine, I believe.
# 4  
Old 08-12-2011
Bash and zsh (and I think ksh93) have -s option for "read" command to get input from a terminal without echoing.
# 5  
Old 08-12-2011
@g.pi: I just feel save to have all settings saved and when messing around with stty I usually save the settings when the script starts and reset them in a trap to have a working terminal in case the script gets interrupted while reading the password or under any other changed stty setting.
But if the shell allows read's -s option sounds less dangerous.
This User Gave Thanks to cero For This Post:
g.pi
# 6  
Old 08-12-2011
@yazu, FYI - not ksh93. At least, not the version on Ubuntu:
Quote:
Version JM 93t+ 2009-05-01
This is what man says about the -s option:
Quote:
If the -s option is present, the input will be saved as a command in the history file.
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