Here is a shell script that encapsulates an awk script. The awk reads each line of each file once to ensure that each file contains at least one match to the multiple strings.
This example uses 2 strings and looks through 4 files, but can be easily extended for more strings. One advantage is that each file is read only once. Another is that when all strings have matched at least once, the operation skips to the next file. For a small number of files, the awk probably is no faster than multiple greps, but for the grep, you can imagine that for 3000 files, if the first keyword appears in 2000 files, then those 2000 files will be read at least twice, and so on. On the other hand, awk will use more CPU time than grep. For simple alpha-numeric strings, fgrep might be slightly faster than plain grep.
Both this approach and the suggestion from bartus11 will require some work to fit a specific problem. Here is the awk:
producing:
See man pages for details.
I want to search files (basically .cc files) in /xx folder and subfolders.
Those files (*.cc files) must contain #include "header.h" AND x() function.
I am writing it another way to make it clear,
I wanna list of *.cc files that have 'header.h' & 'x()'. They must have two strings, header.h... (2 Replies)
Hi,
I will use below command for grep single string ("osuser" is search string)
ex: find . -type f | xarg grep -il osuser
but i have one more string "v$session"
here i want to grep in which file these two strings are present.
any help is appreciated,
Thanks in advance.
Gagan (2 Replies)
Hi All,
I have multiple (5+) text files with single columns and I would like to grep the common values across all the text files and parse it to a new file. All the values are numerical. Please let me know how to do it using awk. (6 Replies)
Hi, every one!
I have a file with multiple strings.
file1
ATQRGNE
ASQGVKFTE
ASSQYRDRGGLET
SPEQGARSDE
ASSRDFTDT
ASSYSGGYE
ASSYTRLWNTGE
ASQGHNTD
PSLGGGNQPQH
SLDRDSYNEQF
I want to grep each string in hundreds of files in the same directory, further, I want to find out the string... (7 Replies)
Hi,
I'd like to find the values of certain fields in multiple csv files stored in 1 directory
based upon an input search string.
An fgrep returns the complete record, I only want certain fields.
Thanks in advance for your help.
Perry (6 Replies)
This
for i in /dev/disco/*;do lvdisplay $i|grep -i size;done
Return me every size of lvm in vg "disco"
I want to return me,the size and the name of lvm,how to do this?
Thanks (7 Replies)
Hi,
I want to grep multiple patterns from multiple files and save to multiple outputs. As of now its outputting all to the same file when I use this command.
Input : 108 files to check for 390 patterns to check for. output I need to 108 files with the searched patterns.
Xargs -I {} grep... (3 Replies)
Hi,
I have 5 files with two columns. I need to merge all the 5 files based on column 1. If any of them are missing then corresponding 2nd column should be substituted by missing value.
I know hoe to do this for 2 files. but how can I implement for 5 files. I tried this based on 5 files but it... (2 Replies)
Hello,
I would like to ask for help with csh script.
An example of an input in .txt file is below, the number of lines varies from file to file and I have 2 or 3 columns with values. I would like to read all the values (probably one by one) and set them to independent unique variables that... (7 Replies)
Hi All,
I want to use egrep on multiple files and the results should be output to multiple files. I am using the below code in my shell script(working in Ksh shell). However with this code I am not attaining the desired results.
#!/bin/ksh
(
a="/path/file1"
b="path/file2"
for file in... (4 Replies)
Discussion started by: am24
4 Replies
LEARN ABOUT REDHAT
igawk
IGAWK(1) Utility Commands IGAWK(1)NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)