tag 15206 notabug thanks On 08/29/2013 12:01 AM, Kaitao Lai wrote: > Dear Sir/Madam, > > I am writing this email to report a bug from od command. I am working in > bioinformatics research filed, and currently I am trying to convert phred > scores from fastq format file to Ascii values, and met weird things. For > example, when I try to convert 100 characters into ASCII values, if the last > 30 characters are the same, it only return part of values, NOT the complete > values. > The example is listed below: > If there is very long poly-# string, then below 100 characters only return 84 > ASCII values. > > $ echo > '=:?D+AAB<B?DCAFEBAF?GHIBGFGCDGBGAFG8CF?F?D=DG?BFHG=@77C#############################################' > | od -An -t dC > 61 58 63 68 43 65 65 66 60 66 63 68 67 65 70 > 69 > 66 65 70 63 71 72 73 66 71 70 71 67 68 71 66 > 71 > 65 70 71 56 67 70 63 70 63 68 61 68 71 63 66 > 70 > 72 71 61 64 55 55 67 35 35 35 35 35 35 35 35 > 35 > 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 > 35 > * > 35 35 35 35 10
This behavior is documented, and required by POSIX. http://pubs.opengroup.org/onlinepubs/9699919799/utilities/od.html If you don't want elision of identical lines, then you must use the -v option. As this is working as intended, and is just usage error on your part, I'm marking this as not a bug. Feel free to add further comments or questions to this report, though. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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