$ echo |awk ' BEGIN {"date" | getline current_time;close("date");print "Report printed on " current_time}'
Report printed on Thu May 11 14:57:29 METDST 2006
This example works fine but how can i print all the output when is longer... (3 Replies)
hello collegues,
I am attempting to use awk to search file1 (serverlist.csv) from each row with file2 (supported.txt). If the is no entry exists in serverlist then output to a file called notsupp.out if there is an entry output to supp.out
I can do this with basic shell scripting however... (0 Replies)
Hello,
Need some help here. I have this script (test.sh):
#!/bin/sh
var=$1
(( var = 2 * var ))
echo $var
Now I want to call this script from awk with one argument and then capture the result in a variable, something like:
echo 40 | awk ' { x = $1; "test.sh " x | getline y; print y }... (1 Reply)
How do you make the getline function return to the original line?
The example below should make it clear where I am currently going wrong.
Thanks
AWK SCRIPT:
-------------
awk -F '-' '{
tmpLine = "EMPTY"
print "CURRENT LINE :"$0
getline tmpLine
print "NEXT LINE :"tmpLine
}'... (1 Reply)
Hi there, I have an ifconfig output and i want to write a script that determines whether there is a line "groupname ipmp" on a particular interface
here is my example ifconfig -a output
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
inet 127.0.0.1... (2 Replies)
Greetings,
I have about 3000 files that I want to search. The first column in all of these 3000 files has a unique serial number on each line. The subsequent columns have lots of data.
I have another masterfile with three columns to help me find all the data I need in a moments notice:
col 1... (15 Replies)
I want to import a textfile with getline into var t which has several lines. How do import all lines, since it only imports the last line:
while < ((getline t "textfile") > 0) (7 Replies)
Hello,
I want to print out the DNA sequence entries (tens of thousand!) that are longer than certain value (i=200) from a file (FASTA file) as:
>S94D_ctg_8004 Average coverage: 402.95
ATAATGCCTGTGAATATGACATGTGTTCCTGTTTCTACATCAGACTACTATTCTTGCATA... (12 Replies)
Hi,
I have an awk script with the following function in it .
function cmd( c )
{
while( ( c | getline foo) > 0 ){
return foo ;
close( c );
}
}
c =... (4 Replies)
Howdy Folks,
It seems like it is always awk that confuses the heck out of me and I even have books and examples.
I have this line:
awk '{if (/clientIP/)(SRV = $NF); if ($2 ~ /BUNDLE-GIM/) getline; if ($2 ~ /r100595/) {print SRV,"BUNDLE-GIM",$2}}' post.txt
to parse this text:
<api... (4 Replies)
Discussion started by: port43
4 Replies
LEARN ABOUT DEBIAN
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. This value can be used to handle embedded null bytes in the line read.
Both functions return -1 on failure to read a line (including end-of-file condition).
ERRORS
EINVAL Bad arguments (n or lineptr is NULL, or stream is not valid).
VERSIONS
These functions are available since libc 4.6.27.
CONFORMING TO
Both getline() and getdelim() were originally GNU extensions. They were standardized in POSIX.1-2008.
EXAMPLE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
FILE *fp;
char *line = NULL;
size_t len = 0;
ssize_t read;
fp = fopen("/etc/motd", "r");
if (fp == NULL)
exit(EXIT_FAILURE);
while ((read = getline(&line, &len, fp)) != -1) {
printf("Retrieved line of length %zu :
", read);
printf("%s", line);
}
free(line);
exit(EXIT_SUCCESS);
}
SEE ALSO read(2), fgets(3), fopen(3), fread(3), gets(3), scanf(3)COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU 2010-06-12 GETLINE(3)