Can an expert kindly write an efficient Linux ksh script that will strip rows with no numbers from a text file?
Supposing there are three rows that text file called text.txt :
"field1","field2","field3",11,22,33,44
"field1","field2","field3",1,2,3,4
"field1","field2","field3",,,,
The... (5 Replies)
Hi All,
I am new to unix scripting, please help me in solving this assignment..
I have a scenario, as follows:
1. i have a text file(read1.txt) with the following data
sairam,123
kamal,122
etc..
2. I have to write a unix... (6 Replies)
My data is something like as shown below. Out of this i want the details of alarms (ex: 1947147711,1947147081......) and the fields( ex :sw=tacmwafabb9:shelf=1:slot=5-2:pport=2)
Once i have these details separated, i want the count of these excluding the duplicates. What is the best possible way... (7 Replies)
I am looking for a tabbed text editor without a big library like gnome, kde, and gtk, I know about gedit, kate with extensions, geany, and bluefish. I would prefer it to be like gedit and be really light weight. So if anyone knows of a text editor that doesn't require those big libraries please let... (3 Replies)
I have a 2 part question on how to this in unix scripting using kshell or c shell.
I have a file described below:
1st record has 2 fields on it
every other record has 22 fields on it.
Example
ABC, email address
Detail 1
Detail 2
Detail 3
.
.
.
1st question is... (4 Replies)
Good morning all, I have a machine running IRIX and I need to edit a text file on the terminal that is literally thousands of lines. Does anyone know the most efficient way to edit portions of files like these? Obviously simply using the vi command isn't going to work since I get a too many lines... (1 Reply)
Hi Experts,
I am querying backup status results for multiple databases and getting each and every database result in one csv file. so i need to combine all csv files in one excel file with separate tabs. I am not familiar with perl script so i am using shell script.
Could anyone please... (4 Replies)
Discussion started by: ramakrk2
4 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)