I have an inputfile that I trying to awk with a getline(Solaris v8 ksh). However I need to have the results be a unique. Is there a comparable command within awk to return a unique result? Or can you break out of the awk to add a uniq. I am looking for something more complex then a pipe... (6 Replies)
hi , I got a script that I don't understand.
awk '{
command="echo "$1
command | getline echome
close(command)
print $0 "\t" echome
}' < user.list
It reads the file user.list
user.list
London John
Bridge Peter
and sends the stream to the awk command.
I don't understand what is... (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)
Hi,
I am using a Solaris OS here. My intention is to print the 2nd field if the first field matches "APPLE=". I am using the "getline" function here (shown below), but it doesn;t work. Can any experts give me some advice?
Input:
ORANGE= 10
APPLE= 20
MANGO= 30
GRAPES= 40
Output:
20
... (5 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)
I can not get 'getline()' to compile. I have tried.
string curLine; //= compiler error
char* curLine; //=compiler error
char curLine; //=compiler error
Every example I see uses a string as a getline(); parameter. It does not work for me on Fedora14 with gcc-c++. Thank you so much. This... (1 Reply)
Here is I want to do:
find lines in file filteredtrace.txt which is not continued as
a multiply of 4 and strip them from file original_trace_framno.
problem is awk used the ' symbol
so pipe of getline has to use the " symbol
while agument of sed has to use the " symbol,
it doesn't... (8 Replies)
Hi All,
When I do man getline on my Linux system (in BASH), I see an example C code where a file is being read using getline() function.
Now, my question is why there is no fclose() to close the open file pointer?
People who don't have a Linux system, this is the code that I am referring... (3 Replies)
Hi.. i am running nawk scripts on solaris system to get records of file1 not in file2 and find duplicate records in a while with the following scripts -compare
nawk 'NR==FNR{a++;next;} !a {print"line"FNR $0}' file1 file2duplicate - nawk '{a++}END{for(i in a){if(a-1)print i,a}}' file1in the middle... (12 Replies)
Discussion started by: Abhiraj Singh
12 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)