01-20-2020
This would be easy if you did not try to make these text processing tasks "one liners" and just write
the (few lines) code to process the file one line at a time, using any programming language you like.
Basically, if you just processed this text in a loop, reading each line at a time, matching flags and setting patterns, you could have easily processed this file. (Or read the file into an array of lines of text.)
The issue, as I see it, is you (not only you, but many) are falling into the "trap" of looking for "one liners" instead of just writing a small program of a few lines which does the trick.
You are not the only person who falls in to the trap of thinking that everything has to be a "one liner" but this will cause you to waste time when you could write a few lines of code in any programming language and most shell scripts to:
- Read the file into an array of lines.
- Process each line and search for your beginning <VirtualHost tag and set a flag.
- When the flag is set, search and match the other string(s) (SSLInsecureRenegotiation ... blah blah) and put the match(es) in an array.
- Stop processing after the end tag </VirtualHost is matched.
This is only a few lines of code and is very easy for you (or anyone with minimal programming skills) to write and you could have easily written this code in the time it takes to search for a "one liners" to do the job.
I'm not trying to give you a hard time and I like your posts; but I'm just saying. For a guy with nearly 1000 posts here; you should just write a handful of lines of code and process this versus wasting your time searching for the perfect "one-liner" REGEX.
Cheers.
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unifdef(1) General Commands Manual unifdef(1)
NAME
unifdef - remove preprocessor lines
SYNOPSIS
sym] sym] sym] sym]] ... [file]
DESCRIPTION
simulates some of the actions of in interpreting C language preprocessor command lines (see cpp(1)). For a valid preprocessor command line
contains as its first character a and one of the following keywords: or The character and its associated keyword must appear on the same
line, but they can be separated by spaces, tabs, and commented text. When appropriate, the portions of code surrounded by and including
the targeted preprocessor directives are removed, and the resultant text is written to the standard output.
Unlike does not insert included files, interpret macros, or strip comment lines. This means, among other things, that and macros occurring
within the input text are not interpreted.
Since is language-independent, it can be used for processing source files for languages other than the C language. For example, can be
used on FORTRAN language source files, provided the C language preprocessor commands are used.
Options
recognizes the following command-line options:
Complement the normal behavior by printing only the rejected lines.
Ignore text delimited by
sym. In other words, text that would otherwise be affected by some action is not touched when found within the context
of a preprocessor command using sym.
Ignore text delimited by
sym.
Replace rejected lines with blank lines
in the text written to the standard output.
Treat the input source as plain text.
C-language comment and quoting constructs are not recognized.
Define symbol
sym.
Cause symbol
sym to be undefined.
RETURN VALUE
The command returns the following exit values:
0 Output is an exact copy of the input.
1 Output is not an exact copy of the input.
2 The command fails. The failure might be due to a premature EOF or to an inappropriate or
EXAMPLES
Assume file contains the following:
The command sequence:
produces the following result in file
WARNINGS
Any symbol name defined in the file must be specified in the command line; otherwise, will ignore the line.
AUTHOR
was developed in the public domain.
SEE ALSO
cpp(1).
unifdef(1)