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Top Forums UNIX for Dummies Questions & Answers Redirection creates empty file Post 302702411 by surib on Tuesday 18th of September 2012 09:54:21 AM
Old 09-18-2012
Redirection creates empty file

I'm using a script that does some modifications to data on disc and updates the database. The script (perl) uses STDOUT so the results are printed to the screen. I don't have permissions to modify the script. I want to capture the results in a file so I can see if errors occurred and also keep track of where I am in the modifications. I've tried redirection and append with '> and >>' and I've tried 'tee and tee -a'. I don't get any errors, but the file remains empty - 0 file size. If I take out the redirection, the script runs fine, it's just that there are so many files modified that I can't see the entire output to note errors. Any ideas?
Code:
scriptname.pl -r /vol1/OPS -d DATATYPE -v VERSION -b 2005-04-05 -e 2005-04-06 | tee -a s4pa_delete_map.log

scriptname.pl -r /vol1/OPS -d DATATYPE -v VERSION -b 2005-04-06 -e 2005-04-07 >> s4pa_delete_map.log

Smilie

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Last edited by vbe; 09-18-2012 at 11:06 AM..
 

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FASTQ_QUALITY_TRIMMER(1)					   User Commands					  FASTQ_QUALITY_TRIMMER(1)

NAME
fastq_quality_trimmer - Filters sequences based on quality DESCRIPTION
usage: fastq_quality_trimmer [-h] [-v] [-t N] [-l N] [-z] [-i INFILE] [-o OUTFILE] Part of FASTX Toolkit 0.0.13.1 by A. Gordon (gor- don@cshl.edu) [-h] = This helpful help screen. [-t N] = Quality threshold - nucleotides with lower quality will be trimmed (from the end of the sequence). [-l N] = Minimum length - sequences shorter than this (after trimming) will be discarded. Default = 0 = no minimum length. [-z] = Compress output with GZIP. [-i INFILE] = FASTQ input file. default is STDIN. [-o OUTFILE] = FASTQ output file. default is STDOUT. [-v] = Verbose - report number of sequences. If [-o] is specified, report will be printed to STDOUT. If [-o] is not specified (and output goes to STDOUT), report will be printed to STDERR. SEE ALSO
The quality of this automatically generated manpage might be insufficient. It is suggested to visit http://hannonlab.cshl.edu/fastx_toolkit/commandline.html to get a better layout as well as an overview about connected FASTX tools. fastq_quality_trimmer 0.0.13.1 April 2012 FASTQ_QUALITY_TRIMMER(1)
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