Ask Rex. Ilya — Russia. Subject: a correction to the article. Hello, Rex, and thank you very much for the site. It took me a while to figure out what the problem is : Please don't publish this message, just correct the article if you think you should.
NewWorld — Germany. I was having problems with Cygwin's grep and multi-line patterns, so thanks for the recommendation to use pcregrep instead. I love your site; everything is explained clearly. I finally learnt how to use lookaheads and behinds thanks to your clear instructions. Really great site. Thanks again. Subject: problem with pcregrep for Windows. I tried the latest version on your site, saying: pcregrep the pcregrep.
If I use an invalid pattern like "zzz", it prints nothing. Hi Glen, That sounds like expected behavior Is that not the case? Remember that a "line" can take several screen lines up to the next carriage return. I tested what you said, and if I remove "the" from one of the lines of input, that line does not show in the output as expected. If you want to see more sober output, you can try something like pcregrep -no the test.
Warm regards, Andy. Cesar Romani. Subject: pcregrep doesn't work. I'm using pcregrep on Windows 7. Many thanks in advance, — Cesar. Subject: RE: pcregrep doesn't work.
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I followed the instructions herethen, I get the error below:. For me Fedora Linuxit was enough to just install the pcre-devel: yum install -y pcre-devel. Didn't even have to use --with-pcre afterwards. In a clean installation of Debian 9. Next I show the type of error and its respective solution. And for the compilation the following the installation of some packages also would avoid us errors in a clean installation of Debian. It is recommended to use the -j3 parameter to make the compilation faster.
Although it could also be ignored. I was other problem compiling apache2 in CentOS with pcre. In RHEL 3 is not necessary setting parameter --with-pcre pointing to pcre-config. Only need pcre path. Learn more. Apache installation; libpcre error Ask Question.
Asked 7 years, 11 months ago. Active 1 year ago. Viewed 93k times. When installing Apache on Ubuntu Please read the documentation. I followed the instructions herethen, I get the error below: configure: error: pcre-config for libpcre not found.
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The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Possible Duplicate: How can I search for a multiline pattern in a file? Use pcregrep. This select statement can span many lines and can contain tabs and newlines. That is, grep knows where end of line is, but sees the input as one big line. Because we're using -zthe whole file is like a single big line, so if there is a match, the entire file would be printed; this way it won't do that.
This is a try to find the same indentation of method. I am not very good in grep. But your problem can be solved using AWK command. Just see. The above code will result from first occurence of select till first sequence of from. Now you need to verify whether returned statements are having customername or not. For this you can pipe the result. And can use awk or grep again.Splunk Commands: "rex" vs "regex" vs "erex" command detailed explanation(Part I)
Your fundamental problem is that grep works one line at a time - so it cannot find a SELECT statement spread across lines. Your second problem is that the regex you are using doesn't deal with the complexity of what can appear between SELECT and FROM - in particular, it omits commas, full stops periods and blanks, but also quotes and anything that can be inside a quoted string.
I would likely go with a Perl-based solution, having Perl read 'paragraphs' at a time and applying a regex to that. The downside is having to deal with the recursive search - there are modules to do that, of course, including the core module File::Find. Learn more. Regex grep for multi-line search needed [duplicate] Ask Question.
Asked 9 years, 7 months ago. Active today. Viewed k times. Can anyone help me with the correct syntax please? Ciaran Archer Ciaran Archer The grep you've indicated here runs forever because you have not specified any files to search at the end of the command The '--include' is a filter of the files named and doesn't actually provide you any files to be filtered.
Active Oldest Votes. Without the need to install the grep variant pcregrep, you can do multiline search with grep. In regexp:? Matthias Braun I'm using GNU grep 2. I recommend '' grep -Pazo '' instead of the unsafer ''-Pzo''.Edit Report a Bug. As a rule of thumb, it's better to describe your regular expression patterns using single-quoted strings.
Using double-quoted strings, the interaction between PHP's and PCRE's interpretations of which bits of the string are escape sequences can get messy. Regular expressions can get messy enough as it is without another layer of escaping making it worse.
As this manual page says, you need PHP 5. It is possible to install later versions of PHP we have 5. You can find out your PCRE version by checking phpinfo. I suspect this ancient PCRE version is included in some officially-supported Red Hat Enterprise package which is probably why we are running it so might also affect other people. If used, this must be the first character of the class e. Pay attention that some pcre features such as once-only or recursive patterns are not implemented in php versions prior to 5.
When enclosing your regular expression in double quotes, back references require two backslashes.
pcresyntax man page
This is confusing, because the manual talks in both cases about "word characters", but fails to mention the difference in behaviour. Back references are a great way to achieve exact matching when it would have been impossible any other way.
Take these three strings. You could write four different regexes to check for every possible case OR you could use back references. Hi there This was originally made by someone eles but it didn't work correctly and so I remade it and as far as I know it works right.
My one works perfectly when stripping just the tags or the tag and its contents too! It also check so there are any regex to replace! Another as yet unresolved discrepancy is that in Perl 5.Listing all ABRT add-ons and plug-ins using glob expressions. Listing installed packages using a double-quoted glob expression. Listing available packages using a single glob expression with escaped wildcard characters.
Listing Packages. All of Yum's list commands allow you to filter the results by appending one or more glob expressions as arguments. Be careful to escape the glob expressions when passing them as arguments to a yum command, otherwise the Bash shell will interpret these expressions as pathname expansionsand potentially pass all files in the current directory that match the globs to yum.
To make sure the glob expressions are passed to yum as intended, either:. To list these packages, type the following at a shell prompt:. Lists all installed and available packages.
Lists all packages installed on your system. The rightmost column in the output lists the repository from which the package was retrieved. Lists the repository ID, name, and number of packages it provides for each enabled repository.
pcregrep man page
Searching Packages 8. Displaying Package Information. Here are the common uses of Markdown. Learn more Close.It was generated automatically from the original man page. If there is any nonsense in it, please consult the man page, in case the conversion went wrong.
See pcresyntax 3 for a quick-reference summary of pattern syntax, or pcrepattern 3 for a full description of the syntax and semantics of the regular expressions that PCRE supports. Patterns, whether supplied on the command line or in a separate file, are given without delimiters. Quotes can of course be used to delimit patterns on the command line because they are interpreted by the shell, and indeed quotes are required if a pattern contains white space or shell metacharacters.
The first argument that follows any option settings is treated as the single pattern to be matched when neither -e nor -f is present. Conversely, when one or both of these options are used to specify patterns, all arguments are treated as path names. At least one of -e-for an argument pattern must be provided. If no files are specified, pcregrep reads the standard input.
The standard input can also be referenced by a name consisting of a single hyphen. However, there are options that can change how pcregrep behaves. In particular, the -M option makes it possible to search for patterns that span line boundaries. What defines a line boundary is controlled by the -N --newline option. The amount of memory used for buffering files that are being scanned is controlled by a parameter that can be set by the --buffer-size option.
The default value for this parameter is specified when pcregrep is built, with the default default being 20K. A block of memory three times this size is used to allow for buffering "before" and "after" lines.
An error occurs if a line overflows the buffer. By default, as soon as one pattern matches a line, no further patterns are considered. However, if --colour or --color is used to colour the matching substrings, or if --only-matching--file-offsetsor --line-offsets is used to output only the part of the line that matched either shown literally, or as an offsetscanning resumes immediately following the match, so that further matches on the same line can be found. If there are multiple patterns, they are all tried on the remainder of the line, but patterns that follow the one that matched are not tried on the earlier part of the line.
This behaviour means that the order in which multiple patterns are specified can affect the output when one of the above options is used. This is no longer the same behaviour as GNU grep, which now manages to display earlier matches for later patterns as long as there is no overlap.
Regular Expressions (Perl-Compatible)
Patterns that can match an empty string are accepted, but empty string matches are never recognized. An example is the pattern " super? This pattern finds all occurrences of both "super" and "man"; the output differs from matching with "super man" when only the matching substrings are being shown.
The --locale option can be used to override this. It is possible to compile pcregrep so that it uses libz or libbz2 to read files whose names end in.
You can find out whether your binary has support for one or both of these file types by running it with the --help option. If the appropriate support is not present, files are treated as plain text. The standard input is always so treated. By default, a file that contains a binary zero byte within the first bytes is identified as a binary file, and is processed specially.
GNU grep also identifies binary files in this manner. See the --binary-files option for a means of changing the way binary files are handled.
The order in which some of the options appear can affect the output. For example, both the -h and -l options affect the printing of file names. Whichever comes later in the command line will be the one that takes effect. Similarly, except where noted below, if an option is given twice, the later setting is used.