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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Wesley,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Have you tried<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>| wgrib2 -v 2016101212.gfs.t12z.pgrb2f001 2>&1 | grep ERROR<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The redirect, 2>&1, is supposed to add the results of STDERR to STDOUT.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Gary Love<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> gradsusr-bounces@gradsusr.org [mailto:gradsusr-bounces@gradsusr.org] <b>On Behalf Of </b>Wesley Ebisuzaki - NOAA Federal<br><b>Sent:</b> Thursday, October 13, 2016 6:02 AM<br><b>To:</b> GrADS Users Forum<br><b>Subject:</b> Re: [gradsusr] Use wgrib2 to check if grib2 file is valid<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal style='margin-bottom:12.0pt'>Ivan,<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>| wgrib2 -v 2016101212.gfs.t12z.pgrb2f001 | grep ERROR<o:p></o:p></p></div><div><p class=MsoNormal>does not work because the error message is sent to STDERR. <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>It depends on the shell but in bash,<br><br> wgrib2 -v 2016101212.gfs.t12z.pgrb2f00 2>stderr.txt<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>will send the error messages to stderr.txt <o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>My (bash) suggestion is<o:p></o:p></p></div><div><p class=MsoNormal>wgrib2 2016101212.gfs.t12z.pgrb2f001 > tmp.inv<o:p></o:p></p></div><div><p class=MsoNormal># now to check the return code<o:p></o:p></p></div><div><p class=MsoNormal>if ["$?" -ne 0 ] ; then<o:p></o:p></p></div><div><p class=MsoNormal> echo "ERROR"<o:p></o:p></p></div><div><p class=MsoNormal> do_something<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>fi<o:p></o:p></p></div><div><p class=MsoNormal># since is is possible that you got no file or a smaller but complete file<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'># check the number of lines in the inventory .. see if you got what you want<o:p></o:p></p></div><div><p class=MsoNormal>N_REC=22<o:p></o:p></p></div><div><p class=MsoNormal>if [ "$N_REC" -ne `wc -n <tmp.inv` ] ; then<o:p></o:p></p></div><div><p class=MsoNormal> echo "ERROR2"<o:p></o:p></p></div><div><p class=MsoNormal> do_something<o:p></o:p></p></div><div><p class=MsoNormal>fi<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>rm tmp.inv<o:p></o:p></p></div><div><p class=MsoNormal>Wesley<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Oct 12, 2016 at 5:48 PM, Ivan Toman <<a href="mailto:ivtoman@inet.hr" target="_blank">ivtoman@inet.hr</a>> wrote:<o:p></o:p></p><p class=MsoNormal>Hello Jeff,<br><br>I do compare file sizes currently, but as they change little bit, it is<br>still not too robust. I'm trying to find fail proof solution.<br><br>So as I said, I can't capture response from wgrib2 into variable for<br>some reason. See these two examples:<br><br>Example 1) Capturing date output to variable:<br>$ response=`date`<br>$ echo $response<br>Wed Oct 12 20:50:46 UTC 2016<br><br>Works just fine.<br><br><br>Wgrib2 error:<br>wgrib2 -v 2016101212.gfs.t12z.pgrb2f001 | grep ERROR<br><br>*** FATAL ERROR: rd_grib2_msg_seq_file, read outside of file, bad grib<br>file ***<br><br><br>Example 2) Trying to capture ERROR from wgrib2:<br>$ response=`wgrib2 -v 2016101212.gfs.t12z.pgrb2f001 | grep ERROR`<br><br>*** FATAL ERROR: rd_grib2_msg_seq_file, read outside of file, bad grib<br>file ***<br>$ echo $response<br><br><br>Nothing is returned. Empty variable. That is what I try to fix..<br><br>Thank you,<br>Ivan Toman<br><br>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br><a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>