I've never toyed with awk, but it seems every time I present an elegant 2- to 8-line script, someone comes back with an awk 1-liner.
I just came up with this to count all the lines of source code in a directory. How would I do it in awk?
LINES=0
for n in $(wc -l *.cpp *.h | cut -b-7); do
... (2 Replies)
Hello everybody,
I'm trying to count the number of consecutive lines in a text file which have two distinctive column field values. These lines may appear in several line blocks within the file, but I only want a single block to be counted.
This was my first approach to tackle the problem (I'm... (6 Replies)
First, thanks for the help in previous posts... couldn't have gotten where I am now without it!
So here is what I have, I use AWK to match $1 and $2 as 1 string in file1 to $1 and $2 as 1 string in file2. Now I'm wondering if I can extend this AWK command to incorporate the following:
If $1... (4 Replies)
Hello, can someone help me how to find a word and 2 lines after it and then send the output to another file.
For example, here is myfile1.txt. I want to search for "Error" and 2 lines below it and send it to myfile2.txt
I tried with grep -A but it's not supported on my system.
I tried with awk,... (4 Replies)
I have a file of 1.3 millions lines.
some are with the same word twice on the line, some line have two diffrent words.
each line has two words, one in brackets.
example:
foo (foo)
bar (bar)
thae (awvd)
beladf (vswvw)
I am sure this can be done with one line of... (6 Replies)
I want to count lines of a file using AWK (only) and not in the END part like this awk 'END{print FNR}' because I want to use it.
Does anyone know of a way?
Thanks a lot. (7 Replies)
Hello experts
I have a file with paragraphs begining with a keeping date and ending with "END":
20120301 num num
John num num A keepnum1 num num
kathrin num num A keepnum1 num num
kathrin num num B keepnum2 num num
Pete num num A keepnum1 num num
Jacob num... (2 Replies)
In the awk below I use $2 of filet to search filea for a match. If the values in $2 are exact match this works great. However, that is not always the case, so I need to perform the search using a range of + or - 2. That is if the value in filea $2 is within + or - 2 of filet $2 then it is matched.... (6 Replies)
I am trying to look for $2 of file1 (skipping the header) in $2 of file2 (skipping the header) and if they match and the value in $10 is > 30 and $11 is > 49, then print the line from file1 to a output file. If no match is foung the line is not printed. Both the input and output are tab-delimited.... (3 Replies)
Discussion started by: cmccabe
3 Replies
LEARN ABOUT CENTOS
getdelim
GETLINE(3) Linux Programmer's Manual GETLINE(3)NAME
getline, getdelim - delimited string input
SYNOPSIS
#include <stdio.h>
ssize_t getline(char **lineptr, size_t *n, FILE *stream);
ssize_t getdelim(char **lineptr, size_t *n, int delim, FILE *stream);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
getline(), getdelim():
Since glibc 2.10:
_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700
Before glibc 2.10:
_GNU_SOURCE
DESCRIPTION
getline() reads an entire line from stream, storing the address of the buffer containing the text into *lineptr. The buffer is null-termi-
nated and includes the newline character, if one was found.
If *lineptr is NULL, then getline() will allocate a buffer for storing the line, which should be freed by the user program. (In this case,
the value in *n is ignored.)
Alternatively, before calling getline(), *lineptr can contain a pointer to a malloc(3)-allocated buffer *n bytes in size. If the buffer is
not large enough to hold the line, getline() resizes it with realloc(3), updating *lineptr and *n as necessary.
In either case, on a successful call, *lineptr and *n will be updated to reflect the buffer address and allocated size respectively.
getdelim() works like getline(), except that a line delimiter other than newline can be specified as the delimiter argument. As with get-
line(), a delimiter character is not added if one was not present in the input before end of file was reached.
RETURN VALUE
On success, getline() and getdelim() return the number of characters read, including the delimiter character, but not including the termi-
nating null byte ('