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Full Discussion: Replace environment variables with sed
Top Forums Shell Programming and Scripting Replace environment variables with sed Post 302218111 by BMDan on Thursday 24th of July 2008 11:27:10 AM
Old 07-24-2008
Worth noting that the scripts, as listed, will fail to (always, fully) protect a password containing the string "PASS=".

To fix that issue, I'd go with:
Code:
s/^\([^=]*PASS=\)/\1*****/

 

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LEARN ABOUT ULTRIX

qmail-popup

qmail-popup(8)                                                System Manager's Manual                                               qmail-popup(8)

NAME

       qmail-popup - read a POP username and password

SYNOPSIS

       qmail-popup hostname subprogram

DESCRIPTION

       qmail-popup reads a POP username and password from the network.  It then runs subprogram.

       qmail-popup is most commonly invoked from inetd as

          qmail-popup CHANGEME checkpassword qmail-pop3d Maildir

       with CHANGEME replaced by the fully qualified domain name of the local host.

       qmail-popup  expects descriptor 0 to read from the network and descriptor 1 to write to the network.  It reads a username and password from
       descriptor 0 in POP's USER-PASS style or APOP style.  It invokes subprogram, with the same descriptors 0 and 1; descriptor 2 writing to the
       network;  and  descriptor  3  reading  the username, a 0 byte, the password, another 0 byte, an APOP timestamp derived from hostname, and a
       final 0 byte.  qmail-popup then waits for subprogram to finish.  It prints an error message if subprogram crashes or exits nonzero.

       qmail-popup should be used only within a secure network.  Otherwise an eavesdropper can steal passwords.  Even if you use APOP,  an  active
       attacker can still take over the connection and wreak havoc.

       qmail-popup has a 20-minute idle timeout.

       qmail-popup is based on a program contributed by Russ Nelson.

SEE ALSO

       maildir(5), qmail-local(8), qmail-pop3d(8)

                                                                                                                                    qmail-popup(8)
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