Need output of script on screen and file with correct return status of the called script.
Hi,
I am trying to capture logs of the script in the file as well as on the screen. I have used exec and tee command for this. While using exec command I am getting the correct output in the file but, script output is not getting displayed on the screen as it get executed.
Below is my sample script. (I have deliberately introduced an error in the script to check exit status).
Code:
$ cat 1.sh
echo "Hi"
echo "how"
echo "are"
echo "you?"
echo "I am fine.."
cp l c
a=`echo $?`
echo $a
if [ $a -ne 0 ]
then
echo "error in script1"
exit 1
fi
$
$ cat 2.sh
#!/bin/bash
exec 1> ./2.log 2>&1
echo "Script 2 started"
sh 1.sh
echo $?
echo "This is part of script2"
$
Output:
Code:
$ sh 2.sh
$
$ ls -ltr 2.log
-rw-rw-r-- 1 dbcomdev dbcomdev 137 Nov 13 02:48 2.log
$
$ cat 2.log
Script 2 started
Hi
how
are
you?
I am fine..
cp: cannot stat `l': No such file or directory
1
error in script1
1
This is part of script2
$
I have tried to use tee command with exec command but it is giving me error.
Code:
$ cat 4.sh
#!/bin/bash
exec 1> >(tee -a ./2.log) 2>&1
echo "Script 2 started"
sh 1.sh
echo $?
echo "This is part of script2"
$
Output:
Code:
$ sh 4.sh
4.sh: line 2: syntax error near unexpected token `>'
4.sh: line 2: `exec 1> >(tee -a ./2.log) 2>&1 '
$
I have also tried to use the tee command, but I am loosing exit status of the script called within main script.
Code:
$ cat 3.sh
#!/bin/bash
echo "Script 2 started"
sh 1.sh 2>&1 | tee -a ./2.log
echo $? | tee -a ./2.log
echo "This is part of script2" | tee -a ./2.log
$
Output:
Code:
$ sh 3.sh
Script 2 started
Hi
how
are
you?
I am fine..
cp: cannot stat `l': No such file or directory
1
error in script1
0
This is part of script2
$
Code:
$ cat 2.log
Hi
how
are
you?
I am fine..
cp: cannot stat `l': No such file or directory
1
error in script1
0
This is part of script2
$
Please advise how to get script output on screen as well as within file without loosing exit status.
I am using Linux machine.
The exec > >(tee...) works with my GNU bash, version 4.3.30(1) - maybe your bash is older? To get at the exit codes of commands in a pipe, try (man bash)
Quote:
PIPESTATUS
An array variable (see Arrays below) containing a list of exit status values from the processes in the most-recently-executed
foreground pipeline (which may contain only a single command).
whose availability may also depend on your version.
The exec > >(tee...) works with my GNU bash, version 4.3.30(1) - maybe your bash is older? To get at the exit codes of commands in a pipe, try (man bash) whose avqailability may also depend on your version.
Thanks for your reply. But, it is not working for me.
My unix version is:
Code:
$ uname -a
Linux XXXXX 2.6.9-89.35.1.ELsmp #1 SMP Tue Jan 4 22:29:01 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
You can set the return code to a variable so you can reuse it at any later time again.
Example - 1.sh
Code:
#!/bin/bash
echo "I'm script: $0" | tee -a ./1.log
[[ $UID -eq 34567 ]]
RET=$?
echo "The exit code was $RET, and now it can be re-used"
echo "Returned: $RET" | tee -a ./1.log
echo "Cat'ing:"
cat 1.log
Output:
Code:
sh 1.sh
I'm script: 1.sh
The exit code was 1, and now it can be re-used
Returned: 1
Cat'ing:
I'm script: 1.sh
Returned: 1
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11-13-2014
