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Full Discussion: Process Substitution Question?
Top Forums UNIX for Dummies Questions & Answers Process Substitution Question? Post 302635381 by rommager on Friday 4th of May 2012 06:24:48 PM
Old 05-04-2012
Process Substitution Question?
Hello to all. I'm new to this forum, so please go easy on me. =)

I am working on a script to send two e-mail attachments in a single e-mail, and am running into a little bit of an issue when using process substitution. I am using the following:

Code:
cat <(uuencode $1 <(basename $1)) <(uuencode $2 <(basename $2)) | mailx -s $3 $4

Basically, I am attempting to encode the attachments with a command functionally similar to:

Code:
uuencode /apps/out/report.html report.html

uuencode has 2 parameters, one is the input file, and the other is the output file name. I basically want the user to see the attachment with the name report.html instead of /apps/out/report.html

For this task, I am using basename, which outputs just the filename, but, when I use it in process substitution with uuencode, what I get is /dev/fd/63 instead of the expected report.html"

I don't think the problem is uuencode, because I can use the following commands and get the following results:

Code:
cat <(basename /apps/out/report.html)

output:
Code:
report.html

however, echo yields a different result:
Code:
echo <(basename /apps/out/report.html)

output:
Code:
/dev/fd/63

I guess I don't understand why echo is getting a different parameter than cat.. Can someone shed some light on why this is, and perhaps suggest how I might get around it?

Thanks!
 

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LEARN ABOUT DEBIAN

sendmailconfig

SENDMAILCONFIG(8)					      System Manager's Manual						 SENDMAILCONFIG(8)

NAME

       sendmailconfig - configure sendmail for Debian systems

SYNOPSIS

       sendmailconfig [--no-reload]

DESCRIPTION

       sendmailconfig is used to simplify the configuration of sendmail(8) for use on Debian systems.

       In  the	simplest  case,  you  may  run	this program to (re)configure sendmail for your Debian system at any time. It will modify the file
       /etc/mail/sendmail.mc in order to create a working sendmail configuration which will be written to the file /etc/mail/sendmail.cf.

       For advanced configurations, you can modify the sendmail.mc file before generating sendmail.cf. Future invokations of  sendmailconfig  will
       preserve these changes provided they are made at the end of the file.

       Normally  sendmailconfig  will  ask  if	you want to reload sendmail after making changes to its configuration. The --no-reload option will
       avoid this question.

FILES

       /etc/mail/sendmail.mc
	      sendmail m4 input to generate sendmail.cf

       /etc/mail/sendmail.cf
	      actual sendmail configuration file

       /etc/mail/sendmail.cw
	      names for which we will accept mail in the standard configuration

       /etc/mail/sendmail.ct
	      names of trusted users in the standard configuration

SEE ALSO

       sendmail(8)

AUTHOR

       Robert Leslie <rob@mars.org>

								    21-Jan-1997 						 SENDMAILCONFIG(8)
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