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Revision 1090

Added by Aaron Marcuse-Kubitza almost 13 years ago

env_password: Print all messages to /dev/tty so the user sees them even if stderr is redirected to a log file. Exit if password not already set, because e.g. scripts run in the background will not be able to prompt for it.

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env_password
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self="$(readlink -f -- "$BASH_SOURCE")"


  		




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force=


  		




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test _"$1" = _- && { force=1; shift;}


  		




  
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out=/dev/tty


  		




  
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function echo2() { echo "$@" >"$out";}


  		




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test "$#" -ge 1 || \


  		




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{ echo "Usage: . $self env_var_name [msg] (note initial \".\")" >&2; exit 2;}


  		




  
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store=


  		




  
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test _"$1" = _- && { store=1; shift;}


  		




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msg="$2"


  		




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test -n "$msg" || msg="$1"


  		




  
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if ! test "$#" -ge 1; then


  		




  
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    echo2 "Usage: . $self env_var [desc] (note initial \".\")"|fold -s >"$out"


  		




  
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    exit 2


  		




  
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fi


  		




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desc="$2"


  		




  
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test -n "$desc" || desc="the $1 password"


  		




  
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function trace()


  		




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{


  		




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    { for arg in "$@"; do printf "%q " "$arg"; done; echo;} >&2


  		




  
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    { for arg in "$@"; do printf "%q " "$arg"; done; echo;} >"$out"


  		




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}


  		




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if test -n "$force" -o -z "${!1+t}"; then # env var with name $1 is unset


  		




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    if test -n "$force"; then action="change the saved value for"


  		




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    else action="avoid having to reenter"


  		




  
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if test -n "$store" -o -z "${!1+t}"; then # env var with name $1 is unset


  		




  
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    if test -n "$store"; then


  		




  
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        echo2 " To change the saved value for $desc, run: " >"$out"


  		




  
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    else


  		




  
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        echo2 " You must first store $desc. At the shell, run: "


  		




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    fi


  		




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    echo " To $action $msg password, run: " >&2


  		




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    trace . "$self" - "$@"


  		




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    read -s -p "Enter $msg password: "; echo


  		




  
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    test -z "$store" && exit 1 # just direct user how to store password


  		




  
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    read -s -p "Enter $desc password: " 2>"$out"; echo2


  		




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    export "$1"="$REPLY"


  		




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fi


  		












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