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Full Discussion: Bizzare behavior on redirect of stdout
Top Forums Shell Programming and Scripting Bizzare behavior on redirect of stdout Post 302945340 by edstevens on Thursday 28th of May 2015 12:35:16 PM
Old 05-28-2015
Bizzare behavior on redirect of stdout
Oracle Linux 5.6 64-bit (derivative of RHEL)

Dear Ann Landers,

This is about as bizarre as anything I've ever seen.
I have a little test script I've been working with. When I redirect stdout to a file, no file. Make a copy of the script to another name. Execute it and redirect stdout, and I get the file.

Starting with the file listing, the file eds_scp_test is the file in question:
Code:
2015-05-28 10:58:38

oracle:$ ls -ltr eds*
-rw-r----- 1 oracle oinstall  5054 Aug 25  2014 eds_audit_report_generic.sql
-rwxr-x--- 1 oracle oinstall  4603 Aug 26  2014 eds_audit_report
-rw-r--r-- 1 oracle oinstall  3348 Apr  6 12:42 edstest.sql
-rwxr-x--- 1 oracle oinstall  2076 May 21 12:42 eds_ftp_test
-rw-r--r-- 1 oracle oinstall 16286 May 27 10:53 eds_ftp_test.log
-rwxr-x--- 1 oracle oinstall  1296 May 28 09:19 eds_scp_test


2015-05-28 10:58:42

oracle:$ cat eds_scp_test
#!/bin/sh
#===========================================================
# Purpose: test scp step from stage_refresh
#
#===========================================================
logfile=/u01/app/oracle/dba/eds_scp_test.log
rm $logfile
export NLS_DATE_FORMAT='dd-Mon-yyyy hh24:mi:ss'
echo ===================================================== 
echo Begin job at `date`
echo ===================================================== 
#===========================================================
# -- get backup files from prodserver 
#
echo ===================================================== 
echo deleteing old backup at `date` 
echo ===================================================== 
cd /backup/stgdb
rm *.rman
rm *.backup
rm *.alog

echo ===================================================== 
echo begin scp at `date` 
echo ===================================================== 
#scp -v oracle@prodserver:/u01/backup/prddb/* .                  
#scp -v prodserver:/u01/backup/prddb/* .  
#scp -q -v prodserver:/u01/backup/prddb/c4q7mt9e_1_1.alog  .  
# ------------------------------------------------------------------------
echo ===================================================== 
echo End job at `date` 
echo Log is at $logfile 
echo ===================================================== 
exit

Just execute the file, and everything is as expected:
Code:
2015-05-28 10:58:55

oracle:$ ./eds_scp_test
rm: cannot remove `/u01/app/oracle/dba/eds_scp_test.log': No such file or directory
=====================================================
Begin job at Thu May 28 10:59:39 CDT 2015
=====================================================
=====================================================
deleteing old backup at Thu May 28 10:59:39 CDT 2015
=====================================================
rm: cannot remove `*.rman': No such file or directory
rm: cannot remove `*.backup': No such file or directory
rm: cannot remove `*.alog': No such file or directory
=====================================================
begin scp at Thu May 28 10:59:39 CDT 2015
=====================================================
=====================================================
End job at Thu May 28 10:59:39 CDT 2015
Log is at /u01/app/oracle/dba/eds_scp_test.log
=====================================================

Execute it again, but redirect stdout to a log file (errout will still go to display)
Code:
2015-05-28 10:59:39

oracle:$ ./eds_scp_test > eds_scp_test.log
rm: cannot remove `*.rman': No such file or directory
rm: cannot remove `*.backup': No such file or directory
rm: cannot remove `*.alog': No such file or directory

But where's the log file?
Code:
2015-05-28 10:59:54

oracle:$ ls -ltr eds*
-rw-r----- 1 oracle oinstall  5054 Aug 25  2014 eds_audit_report_generic.sql
-rwxr-x--- 1 oracle oinstall  4603 Aug 26  2014 eds_audit_report
-rw-r--r-- 1 oracle oinstall  3348 Apr  6 12:42 edstest.sql
-rwxr-x--- 1 oracle oinstall  2076 May 21 12:42 eds_ftp_test
-rw-r--r-- 1 oracle oinstall 16286 May 27 10:53 eds_ftp_test.log
-rwxr-x--- 1 oracle oinstall  1296 May 28 09:19 eds_scp_test

Now, make an exact copy of the subject script:
Code:
2015-05-28 10:59:58

oracle:$ cp eds_scp_test eds_echo_test


2015-05-28 11:00:15

oracle:$ ls -ltr eds*
-rw-r----- 1 oracle oinstall  5054 Aug 25  2014 eds_audit_report_generic.sql
-rwxr-x--- 1 oracle oinstall  4603 Aug 26  2014 eds_audit_report
-rw-r--r-- 1 oracle oinstall  3348 Apr  6 12:42 edstest.sql
-rwxr-x--- 1 oracle oinstall  2076 May 21 12:42 eds_ftp_test
-rw-r--r-- 1 oracle oinstall 16286 May 27 10:53 eds_ftp_test.log
-rwxr-x--- 1 oracle oinstall  1296 May 28 09:19 eds_scp_test
-rwxr-x--- 1 oracle oinstall  1296 May 28 11:00 eds_echo_test

And test it
Code:
2015-05-28 11:00:19

oracle:$ ./eds_echo_test > eds_echo_test.log
rm: cannot remove `/u01/app/oracle/dba/eds_scp_test.log': No such file or directory
rm: cannot remove `*.rman': No such file or directory
rm: cannot remove `*.backup': No such file or directory
rm: cannot remove `*.alog': No such file or directory

And this time we get the expected log file:
Code:
2015-05-28 11:00:31

oracle:$ ls -ltr eds*
-rw-r----- 1 oracle oinstall  5054 Aug 25  2014 eds_audit_report_generic.sql
-rwxr-x--- 1 oracle oinstall  4603 Aug 26  2014 eds_audit_report
-rw-r--r-- 1 oracle oinstall  3348 Apr  6 12:42 edstest.sql
-rwxr-x--- 1 oracle oinstall  2076 May 21 12:42 eds_ftp_test
-rw-r--r-- 1 oracle oinstall 16286 May 27 10:53 eds_ftp_test.log
-rwxr-x--- 1 oracle oinstall  1296 May 28 09:19 eds_scp_test
-rwxr-x--- 1 oracle oinstall  1296 May 28 11:00 eds_echo_test
-rw-r--r-- 1 oracle oinstall   656 May 28 11:00 eds_echo_test.log

Sign me -- Perplexed.
 

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