![]() See template functions to learn about available functions in the template format. The above query will give us the line as 1.1.1.1 200 3 ![]() The following example shows a full log query in action: " grep -F 'wordsword' file.txt or fgrep 'wordsword' file. You can pass in a string shown below instead for a small number of matches, with a dollar sign indicating a newline. Each expression can filter out, parse, or mutate log lines and their respective labels. To use multiple phrases, separated by newlines, to capture relevant matches in a file or text stream from a program, you can use the -F / -fixed-strings to specify them. ![]() A log pipeline is a set of stage expressions that are chained together and applied to the selected log streams. Optionally, the log stream selector can be followed by a log pipeline. Iterate over the files one by one.All LogQL queries contain a log stream selector. matchall input string1 string2 string3Ī recursive solution. name '' xargs grep 'Smith' Let me explain. So far, Im just messing around and Ive got find. Both names must appear on the same line so / OR is out. ![]() Matched_string_count=$(find_all_matches -u|wc -l) 1 06-01-2009 RallyPoint Registered User 12, 0 Grepping for two strings that MUST exist on the same line Trying to find a way to grep for two names on a line. Grep -o -F "$newline_separated_list_of_strings" "$infile" The solution implemented as a bash script:Įcho "Usage: $(basename "$0") input_file string1 " The best you can do is store the matches in a temporary file, and then run grep multiple times using one regex at a time. It cannot be extended for regexes, because a single regex can match multiple different strings and we cannot track which match corresponds to which regex. Note that this approach/solution works only for fixed strings. For example, although the text abcd matches both abc and bcd, grep finds only one of them: $ grep -o -F $'abc\nbcd' <<< abcd One shortcoming with this solution (failing to meet the partial matches should be OK requirement) is that grep doesn't detect overlapping matches. $ grep -o -F $'string1\nstring2\nfoo' input|sort -u|wc -l $ grep -o -F $'string1\nstring3' input|sort -u|wc -l $ grep -o -F $'string1\nstring2\nstring3' input|sort -u|wc -l Using Perl to replace a string in only a certain line of file Injecting a custom die() handler into modperl SOAP handler How to add a user-defined function as a built-in function in Perl Perl Script to determine how many logins were still on the system after 16:00 Remove code between special comments from file perl - fetch column names. Then eliminate duplicate occurrences of matched strings with sort -u,Īnd finally check that the count of remaining lines equals the count of the input strings. Make use of the -o| -only-matching option of grep (which forces to output only the matched parts of a matching line, with each such part on a separate output line), (Invoking grep multiple times, especially with the recursive method, did better than I expected) Perl re optimised: 7s (Removed Getopt::Std and non-regex support for faster startup).Perl non-re optimised: 5s (Removed Getopt::Std and regex support for faster startup).Results: (measured with time, real time rounded to closest half second) # Initiate array tracking what we have matches forįor ((i=0 i and that an if can be used to check the result) Strings=( ) # search strings into an arrayĭeclare -a matches # Array to keep track which strings already match Shift # move it out of the way that is useful This might meet all of your requirements: (regex version miss some comments, look at string version instead) #!/bin/bashįilename="$1" # Filename is first parameter bash version is >= 3 for the regular expression version.Using bash instead of external tools is acceptable.It must return success if everything is found, failure when not.Invoking grep less than once is acceptable.Once enabled for a child process, it cannot be disabled. The child will have its own console window. How to grep for multiple strings in the same line inside a file with similar pattern UNIX: How would I grep in a script using a variable as a search parameter. Peter Anvin 23:59 status: hints on how to check your machine for intrusion Greg KH (6 more replies) 0 siblings, 7 replies 188+ messages in thread From: H. The use of any other external tools are unacceptable On Windows, setting tached to true makes it possible for the child process to continue running after the parent exits. status: establishing a PGP web of trust 23:50 H.Invoking grep multiple times is unacceptable.This is based on the following assumptions:G It is likely MUCH slower than using awk, but if you want to do it anyway. Since you eliminated that option in the question statement, yes, it is possible to do and this provides a way to do it. In case brevity is what you're looking for, here's the GNU awk one-liner to do just what you asked for: awk 'NR=FNRįirst, you probably want to use awk. invented to do general text manipulation jobs like this so not sure why you'd want to try to avoid it. ![]() Awk is the tool that the guys who invented grep, shell, etc. ![]()
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