Hi all,
I need help in doing this scenario. I have two files with multiple lines. I want to compare these two files but ignoring the lines which have words like Tran, Loc, Addr, Charge. Also if i have a word Credit in line, i want to tokenize (i.e string after character "
... (2 Replies)
I have a text file made of different blocks separated by blank lines. I need to print the blocks with odd indexes. How can I get it with awk?
For example i need to print the first and the third block of a file like this:
asgdg sadsd ssgsdgd
ass uff fedd sddddso
ieeduydd dddee deeo
ssancnc... (4 Replies)
I hava a file with following data:
number|CREDIT_ID|NULL
date|SYS_CREATION_DATE|NULL
varchar2|GGS_COMMIT_CHAR|NULL
varchar2|GGS_OP_TYPE|NULL
number|GGS_SCN|NULL|
number|GGS_LOG_SEQ|NULL
number|GGS_LOG_POS|NULL
number|GGS_ORACREC_SCN|NULL
varchar2|BATCH_ID|NULL
char|GGS_IMAGE_TYPE|NULL
... (6 Replies)
well, i am so not familiar with this kind of things but i am gonna explain extactly what i am looking for so hopfully someone can figure it out :)
i have a command that shows memory usage besides the process name, for example(the command output):
500 kb process_1
600 kb process_2
700 kb... (4 Replies)
I have a text file ( basically a log file) and i have 2 words (alpha, beta),
Now i want to search these two words in one line and then print next 15 lines in a temp file. there would be many lines with alpha and beta But I need only last occurrence with "alpha" and "beta" and next 15 lines.
... (4 Replies)
Dear all,
Greetings.
I would like to ask for your help to extract lines with specific words in addition 2 lines before and after these lines by using awk or sed.
For example, the input file is:
1 ak1 abc1.0
1 ak2 abc1.0
1 ak3 abc1.0
1 ak4 abc1.0
1 ak5 abc1.1
1 ak6 abc1.1
1 ak7... (7 Replies)
Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" .
I have attached sample input file and the desired input should be as:
INPUT FORMAT:
SELECT
ABCD,
DEFGH,
DFGHJ,
JKLMN,
AXCVB,... (5 Replies)
Discussion started by: nani2019
5 Replies
LEARN ABOUT LINUX
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), feature_test_macros(7)COLOPHON
This page is part of release 3.27 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)