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Top Forums UNIX for Beginners Questions & Answers Validation using While and IF Post 303025856 by MadeInGermany on Tuesday 13th of November 2018 03:54:32 PM
Old 11-13-2018
First, replace the exit 1 by return 1.
Then loop around the input until it's okay.
Code:
until
  read ... &&
  validate ...
do
  :
done

Here it checks the exit status of the read and the validate. If not 0(=okay) it runs the empty loop body and repeats.
The : (noop) satisfies the syntax.
 

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oggz-validate(1)					      General Commands Manual						  oggz-validate(1)

NAME
oggz-validate -- Validate the Ogg framing of one or more files SYNOPSIS
oggz-validate [-M num | --max-errors num ] [-p | --prefix ] [-s | --suffix ] [-P | --partial ] filename ... oggz-validate [-h | --help ] [-v | --version ] Description oggz-validate validates the Ogg framing of one or more Ogg files. oggz-validate detects the following errors in Ogg framing: o File contains no Ogg packets o Packets out of order o Packet belongs to unknown serialno o Granulepos decreasing within track o Multiple bos pages o Multiple eos pages o eos marked but no bos o Missing eos packets o eos marked on page with no completed packets o Granulepos on page with no completed packets o Theora video bos page after audio bos page o Terminal header page has non-zero granulepos o Terminal header page contains non-header packet o Terminal header page contains non-header segment oggz-validate exits with status 0 if all files are valid Ogg files, and with status 1 if one or more errors are found. Options oggz-validate accepts the following options: Error reporting options -M num, --max-errors num Exit after the specified number of errors. A value of 0 specifies no maximum. -p, --prefix Treat input as the prefix of a stream; suppress warnings about missing end-of-stream markers -s, --suffix Treat input as the suffix of a stream; suppress warnings about missing beginning-of-stream markers on the first chain -P, --partial Treat input as a the middle portion of a stream. Equivalent to both --prefix and --suffix Miscellaneous options -h, --help Display usage information and exit. -v, --version Output version information and exit. AUTHOR
Conrad Parker April 3, 2005; COPYRIGHT
Copyright (C) 2005 CSIRO Australia SEE ALSO
oggz-sort(1), oggz-dump(1), oggz-info(1) oggz-validate(1)
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