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yes, indeed the wily script has this buried: <BR>
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exec 3</home/<i-cant-tell-you>/k_file.asc<BR>
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And this is apparently a one-shot trick; Run that gpg command once, and it has eaten the response. run again, and there ain't no response there no mo. <BR>
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On Mon, 2013-11-18 at 13:55 +0000, Lightner, Jeff wrote:
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File descriptors are just ways to keep track of open files. (Remember everything in Linux/UNIX is really a “file” just not necessarily a “regular file”.)<BR>
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There’s a good discussion of ways to set and use FDs other than 0-2 at:<BR>
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<A HREF="http://www.tldp.org/LDP/abs/html/io-redirection.html">http://www.tldp.org/LDP/abs/html/io-redirection.html</A><BR>
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Additionally I notice the man page for gpg has other options to SET file descriptors.<BR>
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You might look at the rest of the script (or whatever calls it) to see if it is setting a FD before it gets to the line below.<BR>
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<B>From:</B> ale-bounces@ale.org [mailto:ale-bounces@ale.org] <B>On Behalf Of </B>Neal Rhodes<BR>
<B>Sent:</B> Sunday, November 17, 2013 11:57 PM<BR>
<B>To:</B> Atlanta Linux Enthusiasts<BR>
<B>Subject:</B> [ale] FD 3 on gpg?<BR>
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Here is a boiled down script buried in the bowels of a system which uploads data from pharmacies: <BR>
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CMD="gpg --homedir $HOME_DIR/.gnupg --batch --passphrase-fd 3 --decrypt $HOLD 2> /tmp/gpg.err.$$ | /usr/local/bin/$PARSER 2>> $LOG_FILE"<BR>
eval "$CMD"<BR>
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Which actually works. I cannot fathom how. The FM says it will read the passphrase from file descriptor 3. Uh...Stdin, Stdout, Stderr, There goes 0, 1, 2. uh, that would be a file defined within gpg? <BR>
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Well, it sorta works. If you wiggle it, or jiggle it, modify it various ways, it stops working and typically says "Bad passphrase". <BR>
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This:<BR>
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CMD="cat something-something-icanttellyou/k_file.asc | gpg --homedir $HOME_DIR/.gnupg --batch --passphrase-fd 0 --decrypt $HOLD 2> /tmp/gpg.err.$$ | /usr/local/bin/$PARSER 2>> $LOG_FILE"<BR>
eval "$CMD"<BR>
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Does work reliably under various combinations. <BR>
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Maybe there is some magic about FD 3 here, but I'm not finding it. Something about gpg-agent? <BR>
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Neal Rhodes<BR>
MNOP Ltd <BR>
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