Hi All,
Is there any way to append a newline character at the end of a file(coma-separated file), through shell script?
I need to check whether newline character exists at the end of a file, if it does not then append it.
Regards,
Krishna (1 Reply)
Hi All,
I have named a file with current date,time and year as follows:
month=`date | awk '{print $2}'`
date=`date | awk '{print $3}'`
year=`date | awk '{print $6}'`
time=`date +%Hh_%Mm_%Ss'`
filename="test_"$month"_"$date"_"$year"_"$time".txt"
> $filename
The file is created with a... (2 Replies)
Hi All,
We append the output of a file's size in a file. But a newline character is appended after the variable.
Pls help how to clear this.
filesize=`ls -l test.txt | awk `{print $5}'`
echo File size of test.txt is $filesize bytes >> logfile.txt
The output we got is,
File size of... (4 Replies)
I have file called xx
Now i want to rename this file as xxYYYYMMDD_HHMIAM.xls
Here is my code..
export DATE1=`date +%Y%m%d`
mv xx xx$DATE1
This code renames as xxYYYYMMDD
Now how can i append HHMIAM at the end of the file?
Any help is appreciated... (3 Replies)
Hello, I wanted to append 'XYZ' at the end of the text file. How can i do this?
I searched the forums and i am not getting what i want. Any help is highly appreciated. Thanks (2 Replies)
Hi All,
I have following piece of code in UNIX C Shell script and I want to add one more command which can add newline at the end of file only if there is no newline character exists.
foreach file (`ls $dd_PLAYCARD_EDI_IN`)
if ( -f $dd_PLAYCARD_EDI_IN/${file} ) then
cat -n... (4 Replies)
Hi,
I am trying to sort a csv file which has say 10 lines each line having a row size that is upto 30183 no. of COLUMNS (Row length = 30183). There is a LINE FEED (LF) at the end of each line. When I try to sort this file say, based on the second FIELD using the below command,
sort -t ',' +1... (5 Replies)
Hello all,
I have maybe a simple Problem - but I do not know to handle it.
All what I want, is to write a line to file without a newline at the end. It works with "echo -n" for all lines, but not for the last one. At the end of the file is always a "0a" (hex)
My small script:
... (10 Replies)
I have a file which comes every day and the file data look's as below.
Vi abc.txt
a|b|c|d\n
a|g|h|j\n
Some times we receive the file with only a new line character in the file like
vi abc.txt
\n (8 Replies)
Discussion started by: rak Kundra
8 Replies
LEARN ABOUT CENTOS
pthread_getcpuclockid
PTHREAD_GETCPUCLOCKID(3) Linux Programmer's Manual PTHREAD_GETCPUCLOCKID(3)NAME
pthread_getcpuclockid - retrieve ID of a thread's CPU time clock
SYNOPSIS
#include <pthread.h>
#include <time.h>
int pthread_getcpuclockid(pthread_t thread, clockid_t *clock_id);
Compile and link with -pthread.
DESCRIPTION
The pthread_getcpuclockid() function returns the clock ID for the CPU time clock of the thread thread.
RETURN VALUE
On success, this function returns 0; on error, it returns a nonzero error number.
ERRORS
ENOENT Per-thread CPU time clocks are not supported by the system.
ESRCH No thread with the ID thread could be found.
VERSIONS
This function is available in glibc since version 2.2.
CONFORMING TO
POSIX.1-2001.
NOTES
When thread refers to the calling thread, this function returns an identifier that refers to the same clock manipulated by clock_gettime(2)
and clock_settime(2) when given the clock ID CLOCK_THREAD_CPUTIME_ID.
EXAMPLE
The program below creates a thread and then uses clock_gettime(2) to retrieve the total process CPU time, and the per-thread CPU time con-
sumed by the two threads. The following shell session shows an example run:
$ ./a.out
Main thread sleeping
Subthread starting infinite loop
Main thread consuming some CPU time...
Process total CPU time: 1.368
Main thread CPU time: 0.376
Subthread CPU time: 0.992
Program source
/* Link with "-lrt" */
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include <errno.h>
#define handle_error(msg)
do { perror(msg); exit(EXIT_FAILURE); } while (0)
#define handle_error_en(en, msg)
do { errno = en; perror(msg); exit(EXIT_FAILURE); } while (0)
static void *
thread_start(void *arg)
{
printf("Subthread starting infinite loop
");
for (;;)
continue;
}
static void
pclock(char *msg, clockid_t cid)
{
struct timespec ts;
printf("%s", msg);
if (clock_gettime(cid, &ts) == -1)
handle_error("clock_gettime");
printf("%4ld.%03ld
", ts.tv_sec, ts.tv_nsec / 1000000);
}
int
main(int argc, char *argv[])
{
pthread_t thread;
clockid_t cid;
int j, s;
s = pthread_create(&thread, NULL, thread_start, NULL);
if (s != 0)
handle_error_en(s, "pthread_create");
printf("Main thread sleeping
");
sleep(1);
printf("Main thread consuming some CPU time...
");
for (j = 0; j < 2000000; j++)
getppid();
pclock("Process total CPU time: ", CLOCK_PROCESS_CPUTIME_ID);
s = pthread_getcpuclockid(pthread_self(), &cid);
if (s != 0)
handle_error_en(s, "pthread_getcpuclockid");
pclock("Main thread CPU time: ", cid);
/* The preceding 4 lines of code could have been replaced by:
pclock("Main thread CPU time: ", CLOCK_THREAD_CPUTIME_ID); */
s = pthread_getcpuclockid(thread, &cid);
if (s != 0)
handle_error_en(s, "pthread_getcpuclockid");
pclock("Subthread CPU time: 1 ", cid);
exit(EXIT_SUCCESS); /* Terminates both threads */
}
SEE ALSO clock_gettime(2), clock_settime(2), timer_create(2), clock_getcpuclockid(3), pthread_self(3), pthreads(7), time(7)COLOPHON
This page is part of release 3.53 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/.
Linux 2009-02-08 PTHREAD_GETCPUCLOCKID(3)