-vb duplicates progress bar output #53

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1. hoytech commented on Jun 6, 2017

   

   hoytech

   on Jun 6, 2017

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   Hi,

   The reason you're seeing two is that it tries to show an interactive progress bar while touching, by printing "\r" to go back to the beginning of the line and overwriting with a new progress bar. I believe it does this at the beginning and the end of processing each file, which is why you're seeing 2 even though you're not touching (just displaying).

   I agree this looks like a bug. I'll think about the best way to solve this and update this ticket when I do.

   In the meantime, you can eliminate the excess lines with the following:

   cat vmtouch.out | perl -pe 's/^.*\r//'

   Thanks for the report!
2. pfee commented on Apr 14, 2022

   

   pfee

   on Apr 14, 2022

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   I've encountered the same issue, reproduced with:

   $ vmtouch -v /usr/bin/ls | cat -v
   /usr/bin/ls
   ^M[OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO] 33/33^M[OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO] 33/33
   
              Files: 1
        Directories: 0
     Resident Pages: 33/33  132K/132K  100%
            Elapsed: 0.000152 seconds
   

   My use case is to regularly display vmtouch output using the watch utility.

   $ watch -n 1 vmtouch -v growing_file.bin
   

   Having output repeated twice is undesirable. Perhaps vmtouch could have a flag to disable the interactive progress bar and its use of \r.
3. pfee commented on Apr 15, 2022

   

   pfee

   on Apr 15, 2022

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   Having looked at the code, the carriage return characters can be eliminated for the case where -v is used on the command line without -t. The changes are available in pull request #97.