![]() This path is a string value and normally you need to escape the backslash character ( \ ) to have the search ignore the backslash in the string. If a double quotation occurs in the string, it must be escaped using another double quotation.įor example, you want to specify the path C:\windows in your search. Raw string literals must be preceded by the at symbol ( ) and enclosed in double quotation marks. WHERE `user "ladron" from 192.0.2.0/24`įor more information, see Search literals in expressions.Ī raw string literal is an expression in which the backspace character ( \ ) is not processed. You specify the search literal in the WHERE clause of the from command: The quoted string inside the set of terms doesn't need to be escaped. You must enclose the terms in backtick characters ( ` ). Internally the search becomes user AND "ladron" AND from AND 192.0.2.0/24 With a search literal, an AND condition is implied between each of the terms. To search for these terms you can use a search literal. You want to search for the terms user "ladron" from 192.0.2.0/24 in these events. Splunk Search Processing Language (SPL) regular expressions are Perl Compatible Regular Expressions (PCRE).Failed password for user "ladron" from 192.0.2.0/24 port 1047 ssh2 You can use regular expressions with the rex command, and with the match, mvfind, and replace evaluation functions. See the Quick Reference for SPL2 eval functions in the SPL2 Search Reference. Here are a few things that you should know about using regular expressions in SPL searches.Ī pipe character ( | ) is used in regular expressions to specify an OR condition. splunk remove special characters from field Splunk regex tutorial. This is interpreted by SPL as a search for the text "expression" OR "with pipe". Splunk Regular Expressions: Rex Command Examples Last updated: Table of Contents Rex vs regex Extract match to new field Character classes This post is about the rex command. The backslash is an escape character in both JSON strings and regular expressions. For a longer filepath, such as c:\\temp\example, you would specify c:\\\\temp\\example in your regular expression in the search string.Splunk Search Processing Language (SPL) regular expressions are PCRE (Perl Compatible Regular Expressions).įor the regex command see Rex Command Examples Splunk version used: 8.x. You can use regular expressions with the rex and regex commands. You can also use regular expressions with evaluation functions such as match and replace. Here are a few things that you should know about using regular expressions in Splunk searches.Ī pipe character ( | ) is used in regular expressions to specify an OR condition. For example, A or B is expressed as A | B.īecause pipe characters are used to separate commands in SPL, you must enclose a regular expression that uses the pipe character in quotation marks. ![]() The backslash character ( \ ) is used in regular expressions to "escape" special characters. The period character is used in a regular expression to match any character, except a line break character. If you want to match a period character, you must escape the period character by specifying \. Splunk SPL uses the asterisk ( * ) as a wildcard character. The backslash cannot be used to escape the asterisk in search strings. Searches that include a regular expression that contains a double backslash, such as in a filepath like c:\\temp, the search interprets the first backslash as a regular expression escape character. The filepath is interpreted as c:\temp, one of the backslashes is removed. ![]() You must escape both backslash characters in a filepath by specifying 4 consecutive backslashes for the root portion of the filepath. See About Splunk regular expressions in the Knowledge Manager Manual.See Extract fields using regular expressions.For a longer filepath, such as c:\\temp\example, you would specify c:\\\\temp\\example in your regular expression in the search string.
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