I have two files. File A and File B.
File A has two fields separated by comma
352020252365988, 652020100572356
546876543215667, 652065465654686
...
File B has many Fields separate by spaces
Date Name 352020252365988 Reference
Date2 Name2 546876543215667 Reference
I want to... (4 Replies)
Hi,
I need some help in knowing how I can append tabs at the end of each line...
The data looks something like this:
field1, field2, field3, field4
1 2
3 4 5
I have values in field1 and field 2 in the first row and I would like to append tab on field3 and field4 for the first row..and in... (6 Replies)
i'm new to shell scripting and have a problem please help me
in the script i have a nawk block which has a variable count
nawk{
.
.
.
count=count+1
print count
}
now i want to access the value of the count variable outside the awk block,like..
s=`expr count / m`
(m is... (5 Replies)
Hi All,
I have the following file that has computer data for various pcs in my network...
Snap of the file is as follows
*******************************************************************************
Serial
123456
Computer IP Address
lo0:... (1 Reply)
Hi! Is there a way to append column and row header to a file in awk script.
For example if I have
Jane F 39 manager
Carlos M 40 system administrator
Sam F 20 programmer
and I want it to be
# name gend age occup
1 Jane F 39 manager
2 Carlos M ... (4 Replies)
Hi All,
I am working on nawk script, has the small function which prints the output on the screen.Am trying to print/append the same output in a file.
Basically nawk script should print the output on the console/screen and as well it should write/append the same result to a file.
script :... (3 Replies)
Hi guys,
I have problem to append new data at the end of each line of the files where it takes whole value of the nth column. My expected result i just want to take a specific value only. This new data is based on substring of 11th, 12th 13th column that has comma seperated value.
My code:
awk... (4 Replies)
Hi Experts,
Please bear with me, i need help
I am learning AWk and stuck up in one issue.
First point : I want to sum up column value for column 7, 9, 11,13 and column15 if rows in column 5 are duplicates.No action to be taken for rows where value in column 5 is unique.
Second point : For... (1 Reply)
Please help me to get required output for both scenario 1 and scenario 2 and need separate code for both scenario 1 and scenario 2
Scenario 1
i need to do below changes only when column1 is CR and column3 has duplicates rows/values. This inputfile can contain 100 of this duplicated rows of... (1 Reply)
Discussion started by: as7951
1 Replies
LEARN ABOUT REDHAT
getline
GETLINE(3) Linux Programmer's Manual GETLINE(3)NAME
getline, getdelim - delimited string input
SYNOPSIS
#define _GNU_SOURCE
#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);
DESCRIPTION
getline() reads an entire line, storing the address of the buffer containing the text into *lineptr. The buffer is null-terminated and
includes the newline character, if a newline delimiter was found.
If *lineptr is NULL, the getline() routine will allocate a buffer for containing the line, which must be freed by the user program. Alter-
natively, before calling getline(), *lineptr can contain a pointer to a malloc()-allocated buffer *n bytes in size. If the buffer is not
large enough to hold the line read in, getline() resizes the buffer to fit with realloc(), 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 size respectively.
getdelim() works like getline(), except a line delimiter other than newline can be specified as the delimiter argument. As with getline(),
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 character. This value can be used to handle embedded null characters in the line read.
Both functions return -1 on failure to read a line (including end of file condition).
ERRORS
EINVAL Bad parameters (n or lineptr is NULL, or stream is not valid).
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);
}
if (line)
free(line);
return EXIT_SUCCESS;
}
CONFORMING TO
Both getline() and getdelim() are GNU extensions. They are available since libc 4.6.27.
SEE ALSO read(2), fopen(3), fread(3), gets(3), fgets(3), scanf(3)GNU 2001-10-07 GETLINE(3)