Shell Programming and Scripting

Just playing around with process substitution.
Hoping maybe someone can give me some help on what I'm doing wrong.
When this script is run, "Null message body; hope that's ok" is returned and the script hangs.
I can't seem to work out what I'm doing wrong.

Here is the script:

Code:

#!/bin/bash
#
# test script for piping date stamps onto stderr then to mail
#
#
EMAILLOGS="true"
EMAILTO="email@email.com"
SUBJECT="testing"
ERRORLOG="/tmp/error.log"

##Where are we sending stderr..
if [ $EMAILLOGS == true ]; then
        ##This is the process substitution: Read in sterr lines,
        ##echo back timstamp+line, then pipe that to mail.
      exec 2> >(while read line; do echo -e "$(date):${line}\n"; done | /usr/bin/mail -s "$SUBJECT" "$EMAILTO")
else
      exec 2>>$ERRORLOG
fi

echo -e "Testing Error\n" &>2
echo -e "Testing STDERR" &>2
exit

---------- Post updated at 12:45 PM ---------- Previous update was at 12:34 PM ----------

ah geez. brain fart.

Code:

echo -e "Testing Error\n" &>2
echo -e "Testing STDERR" &>2

Supposed to be >&2.


BLAH.
Sorry.

---------- Post updated at 01:01 PM ---------- Previous update was at 12:45 PM ----------

Well, I guess while I'm here.

Anyone have an idea to say if there are no errors (if message body is null) then do not send?

I've found this with mail:

mail [-EiInv] [-s subject] [-c cc-addr] [-b bcc-addr] [-F] to-addr ...
[-sendmail-option ...]

-E Do not send messages with an empty body. This is useful for pip-
ing errors from cron(8) scripts.

But it seems to fail with "Unknown command: -s".

New code would be like this:

Code:

exec 2> >(while read line; do echo -e "$(date):${line}\n"; done|/usr/bin/mail -E -s "$SUBJECT" "$EMAILTO")

Not all versions of mail have an -s option.

Noted.

However, I can run the command without the -E option and it will parse correctly.

In the man file I quoted, the structure seems to support both -E and -s in the same line.


Thanks for the input.

Further to cfajohnson, what Operating System do you have?

What do you type at the command prompt?

What output did you expect?

What output did you receive?