I have a file that contains a great number of lines, let's say 183 lines, and I want to add: echo " to the beginning of each line. What is the easiest way to do it?
Tx (9 Replies)
Hey all
i am pretty new to awk... here my problem.
My input is something like this:
type: NSR client;
name: pegasus;
save set: /, /var, /part, /part/part2, /testpartition,
/foo/bar,... (9 Replies)
I made a script that can swap info on two lines using a combination of awk and sed, but was hoping to consolidate the script to make it run faster. If found this script, but can't seem to get it to work in a bash shell. I keep getting the error "Too many {'s". Any help here would be appreciated:... (38 Replies)
Hello,
i am trying to write a script file in awk which yields me the number of lines,characters and words, i checked it many many times but i am not able to find any mistake in it. Please tell me where i went wrong.
BEGIN{
print "Filename Lines Words Chars\n"
}
{
filename=filename + 1... (2 Replies)
I'm a bit new to regex and sed/perl stuff, so I would like to ask for some advice. I have tried several variations of scripts I've found on the net, but can't seem to get them to work out just right.
I have a file with the following information...
# Host 1
host 45583 {
filename... (4 Replies)
Hi,
how could you go about removing words that begin with a certain character.
assuming that this character is '-' I currently have
echo "-hello" | sed s/-/""/
which replaces the leading dash with nothing but I want to remove the whole word, even if there are multiple words beginning... (3 Replies)
Hello All,
My requirement is to get test between two words START & END, something like html tags
Eg. Input file:
START
Line1
Line2
Line3
CLOSE
START
Line4
Line5
Line6
END
START
Line7
START
Line8 (7 Replies)
Hi All,
Sorry if this question has been posted elsewhere, but I'm hoping someone can help me! Bit of an AWK newbie here, but I'm learning (slowly!)
I'm trying to cobble a script together that will save me time (is there any other kind?), to swap two fields (one containing whitespace), with... (5 Replies)
Is there an efficient awk that can count the number of lines that occur in between two tags.
For instance, consider the following text:
<s>
Hi PP -
my VBD -
name DT -
is NN -
. SENT .
</s>
<s>
Her PP -
name VBD -
is DT -
the NN -
same WRT -
. SENT -
</s>
I am interested to know... (4 Replies)
I have a file like below.
2018.07.01, Sunday
09:27 some text 123456789 0 21 0.06 0.07 0.00
2018.07.02, Monday
09:31 some text 123456789 1 41 0.26 0.32 0.00
09:39 some text 456789012 1 0.07 0.09 0.09
09:45 some text 932469494 1 55 0.29 0.36 0.00
16:49 some text 123456789 0 48 0.12 0.15 0.00... (9 Replies)
Discussion started by: father_7
9 Replies
LEARN ABOUT LINUX
getdelim
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)