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Full Discussion: Pattern to match date in YYYY-MM-DD format on Linux machine
Top Forums Shell Programming and Scripting Pattern to match date in YYYY-MM-DD format on Linux machine Post 303010754 by Don Cragun on Saturday 6th of January 2018 10:17:04 AM
Old 01-06-2018
I will stand by my original statement that to get the output you showed us before, the only way to get that output was for line #2 in your input file to be a blank line. That is why it is crucial that you show us the actual output produced by your code instead of an abridged form that hides whatever problem you may actually be encountering.

With the code you showed us in post #1 in this thread:
Code:
if ($14 !~ /^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/) {print "Error 131: Incorrect DocumentDate pattern", "Field position 14, Linenumber:"NR,$0}

and with the code you showed us in post #8:
Code:
if ($14 !~ /^[0-9]{4}\-(0[1-9]|1[0-2])\-(0[1-9]|[1-2][0-9]|3[0-1])$/) {print "Error 131: Incorrect DocumentDate pattern", "Field position 14, Linenumber:"NR,$0}

and with a simpler, equivalent ERE:
Code:
if ($14 !~ /^[0-9]{4}-(0[1-9]|1[0-2])-([0-2][0-9]|3[0-1])$/) {print "Error 131: Incorrect DocumentDate pattern", "Field position 14, Linenumber:"NR,$0}

I do not get any output from any of these three if statements from a file where line 2 in that file is the text you showed us in post #6.

My best guess would be that there is a non-printing character or some other character followed by a <backspace> character that hides the fact that there are other characters present in that field that do not match the ERE in your test. To verify this, show us the output from the command:
Code:
od -bc aj.txt

where aj.txt is a file containing the output from running the script you showed us in post #8 containing the diagnostic message I showed you in post #7.
 

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LEARN ABOUT CENTOS

dp

DP(8)								     [nmh-1.5]								     DP(8)

NAME

       dp - parse dates 822-style

SYNOPSIS

       /usr/lib/mh/dp [-form formatfile] [-format string] [-width columns] [-version] [-help] dates ...

DESCRIPTION

       Dp  is  a  program that parses dates according to the ARPA Internet standard.  It also understands many non-standard formats, such as those
       produced by TOPS-20 sites and some UNIX sites using ctime(3).  It is useful for seeing how nmh will interpret a date.

       The dp program treats each argument as a single date, and prints the date out in the official 822-format.  Hence, it  is  usually  best	to
       enclose each argument in quotes for the shell.

       To  override  the  output  format  used by dp, the -format string or -format file switches are used.  This permits individual fields of the
       address to be extracted with ease.  The string is simply a format string and the file is simply a format file.  See  mh-format(5)  for  the
       details.

       Here is the default format string used by dp:

	    %<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>

       which  says  that  if an error was detected, print the error, a `:', and the date in error.  Otherwise, output the 822-proper format of the
       date.

FILES

       $HOME/.mh_profile	  The user profile

PROFILE COMPONENTS

       None

SEE ALSO

       ap(8), Standard for the Format of ARPA Internet Text Messages (RFC-822)

DEFAULTS

       `-format' default as described above
       `-width' default to the width of the terminal

CONTEXT

       None

BUGS

       The argument to the -format switch must be interpreted as a single token by the shell that invokes dp.  Therefore, one must  usually  place
       the argument to this switch inside quotes.

MH.6.8								   11 June 2012 							     DP(8)
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