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grant123
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PostPosted: Thu Feb 05, 2015 5:12 pm    Post subject: email output from multiple commands Reply with quote

I was hoping to use this code to get the output of all 3 commands emailed to me, but only the output from the last command appears in the email. Does anyone know why?

Code:
glsa-check -t all ; emerge -pvDuN world ; emerge -p --depclean 2>&1| mail $MAILTO
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khayyam
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PostPosted: Thu Feb 05, 2015 8:09 pm    Post subject: Reply with quote

grant123 ... something like:

Code:
% {echo 1 ; echo 2 ; echo 3} | mail -s test root

Code:
Date: Thu,  5 Feb 2015 21:05:05 +0100 (CET)
From: khayyam@aporia.localdomain
To: root@aporia.localdomain
Subject: test
Return-Path: <khayyam@aporia.localdomain>
1
2
3

best ... khay
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grant123
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PostPosted: Thu Feb 05, 2015 9:20 pm    Post subject: Reply with quote

When I do that I get:

Code:
-su: fg: %: no such job
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khayyam
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PostPosted: Thu Feb 05, 2015 9:47 pm    Post subject: Reply with quote

grant123 wrote:
When I do that I get:

Code:
-su: fg: %: no such job

grant123 ... the '%' was the shell prompt, so not to be included in the command ...

best ... khay
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grant123
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PostPosted: Thu Feb 05, 2015 9:51 pm    Post subject: Reply with quote

Oh whoopsie, I always get a # or $ for the prompt. Anyway, I get this:

Code:
{ echo 1 ; echo 2 ; echo 3 } | mail -s test root
>


I think it's waiting for input.
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khayyam
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PostPosted: Thu Feb 05, 2015 10:54 pm    Post subject: Reply with quote

grant123 wrote:
Oh whoopsie, I always get a # or $ for the prompt.

grant ... yes, and for zsh it's '#' and '%'

grant123 wrote:
Anyway, I get this:

Code:
{ echo 1 ; echo 2 ; echo 3 } | mail -s test root
>

I think it's waiting for input.

oh ... I'd assumed this would work exactly the same for bash, in zsh '{ }' is a subshell. The ">" seems to be mail waiting for you to provide the body of the msg (which should come from the pipe). I'm really not sure what the problem is here, perhaps a bash user can provide an explanation.

BTW, the above works for me exactly as shown.

best ... khay
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grant123
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PostPosted: Thu Feb 05, 2015 11:06 pm    Post subject: Reply with quote

It looks like I just needed to switch the curly brackets for parenthesis, thanks Khay!
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Hu
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PostPosted: Thu Feb 05, 2015 11:19 pm    Post subject: Reply with quote

When using bash, you need a semicolon after the last command before the end of the braced expression: { echo a; echo b; echo c; } | mail.

As for the original question, it does exactly what you told it to do. It runs three command sequences:
  • glsa-check -t all
  • emerge -pvDuN world
  • emerge -p --depclean 2>&1| mail $MAILTO
Only the third sequence has its output redirected. The first two print to stdout of the calling shell.
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