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Splunk rex mac address12/12/2023 As a result, \\ in SPL becomes \ before it is parsed as a regular expression, and \\\\ in SPL becomes \\ before it is parsed as a regular expression.Īvoid extra escaping backslash characters Each parse applies its own use of backslashes in layers and treats each backslash as a special character that needs an additional backslash to make it literal. One reason you need extra escaping backslashes in your searches is that Splunk software parses text twice once for SPL and then again for 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. You must escape both backslash characters in the filepath by specifying 4 consecutive backslashes for the root portion of the filepath, such as c:\\\\temp. The filepath is interpreted as c:\temp, because one of the backslashes is removed. In 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. If you want to match a period character, you must escape the period character by specifying \. ![]() For example, the period character is used in a regular expression to match any character, except a line break character. The backslash character ( \ ) is used in regular expressions to escape any special characters that have meaning in regular expressions, such as periods ( . ), double quotation marks ( " ), and backslashes themselves. This is interpreted by SPL as a search for the text "expression" OR "with pipe".īackslash characters in regular expressions 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. 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. ![]() You can also use regular expressions with evaluation functions such as match and replace. You can use regular expressions with the rex and regex commands. Regular expressions in the Splunk Search Processing Language (SPL) are PCRE (Perl Compatible Regular Expressions).
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