Thanks , If you do not mind can you please explain me this one liner how diff parts works..
Thanks
Krsna
a=$1 --> a will hold the first field
a=a""substr($2,length($2)-1,length($1)) --> append the last character of second filed with a
getline --> read the next line ( so that $0 will be having the next line )
I have a comma delimited file which also contains commas in the text. I was wondering how I can combine one whole column of that file with another file. In essence I'm trying to do an excel vlookup in UNIX to return the information from one column in the comma delimited file(containing text commas... (1 Reply)
Hello,
I am attempting to combine two files where the second file can have more than one match with the lookup field (node) in the first file, onto one line of the output file. Also alerting if a lookup was not found in file2
=-=-=-=-=-=-=
Example of file1
node,type
=-=-=-=-=-=-=
bob,232... (5 Replies)
I've got two large csv text table files with different number of columns each.
I have to compare them based on first two columns and create resulting file
that would in case of matched first two columns include all values from first one and all values (except first two colums) from second one. I... (5 Replies)
Hi everybody.
I have a number of files that i would like to combine. however not concatenating, but rather extract lines from the files.
Example:
File1 ------ File2 ------File3 ...
line11 ---- line21 ---- line31 ...
line12 ---- line22 ---- line32 ...
line13 ... (3 Replies)
Dear All-
My requirement is as below-
Header file
$ cat HEADER.txt
RequestId:
RequestDate:
Data file
$ cat DATAVAL.txt
1001|2009-03-01
I need to send the combined data below as email body via mailx command
------------------
RequestId:1001
RequestDate:2009-03-01
I would like... (4 Replies)
I have a directory of 3000 files without extensions (Solaris 5.10).
I would like to iterate the file names through the 'file' command and output their mime types (most are pdf or jpg, but a very few might be psd or swf which show simply as 'data')
So, I would like the output of the 'ls'... (2 Replies)
Hi all,
I have a file with lot of lines with repeating pattern. ( TABLE_NAME line followed by Total line).
I would like combine these two lines into one line seperated by cama and create a new file. Is there a simple way to do this.
Current Format ( just a sample 4 lines )
TABLE_NAME:... (10 Replies)
Hi there! Need help on some issue, I have data like this:
123
456
789
012
i need it to be like this:
123789
456012
Anyone has any idea how to do this? Thanks!
Regards,
Ken
How to use code tags (8 Replies)
:confused:Hello -- i just joined the forums. I am a complete noob -- only about 1 week into learning how to program anything... and starting with linux.
I am working in Linux terminal.
I have a folder with a bunch of txt files. Each file has several lines of html code. I want to combine... (2 Replies)
Hello Unix gurus,
I have a large number of files (say X) each containing two columns of data and the same number of rows.
I would like to combine these files to create a unique merged file containing X columns corresponding to the second column of each file (with a bonus of having the first... (3 Replies)
Discussion started by: ksennin
3 Replies
LEARN ABOUT DEBIAN
getline
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)