It only actually does the output when it has an end of record indicator. Unless you tell it to flush it. I wish I could remember more of my c programming better but this will work.
Hi,
Consider the following piece of code:
int main(void) {
int i;
pid_t pidp;
for (i=0;i<4;i++) {
switch (pidp=fork()) {
case -1:
fprintf(stdout, "Error during fork.\n");
exit (1);
case 0:
fprintf(stdout, "From child: I am... (4 Replies)
i'm just trying to make 2 process read from the same 1 line a time. For some reason only the child reads.
#include<stdio.h>
#include <sys/types.h>
void getlinefromfilep(void);
void getlinefromfilec(void);
int see=0;
FILE * fileptr1;
//need globe variable to tell pro3 to stop
main()... (3 Replies)
Hi. One of my company's customers requires mails to be sent to them to use TLS. Thanks to some good documentation on the web, I've got this mostly figured out, but now I'm stuck at generating the CSR.
My company's mail domain is sg.bunny.com (not real address, obviously), but the email gateway... (0 Replies)
I have this little program ...
int main(void){
printf("Before");
fork();
printf("After");
}
output is this.....
BeforeAfterBeforeAfter
Shouldnt it be.....BeforeAfterAfter
After parent is forked child receives the copy of program and continues from next statement... (3 Replies)
Hi All,
In my program i am handling SIGHUP signal. In the handler i fork and then exec on child process same binary file which is running. Parent process will die after 10 mins.
Now my child process which was exec with same binary file is not receiving SIGHUP signal. Below is the progran code:... (6 Replies)
i am a beginner of C, and i tired to fork multiple child and all of them belongs to same parents and each of child responsible for printing individual data.
but i don't have any idea how to do......
Can any body help? thanks a lot really. (7 Replies)
Hi, can someone please help me with creating mutltiple fork.. I was expecting something like this:
I am a child: 1 PID: 1215
I am a child: 2 PID: 1216
I am a child: 3 PID: 1217
I am a child: 4 PID: 1218
I am a child: 5 PID: 1219
I am a child: 6 PID: 1215
I am a child: 7 PID: 1216
I am a... (4 Replies)
Hello everyone, this is my first post.
I have a task to use a fork to create multiple processes and then use execlp to run another program to add 2 numbers.
The problem I am having is we are supposed to use the exit() call in the execlp to return the small integer. This is a bad way to... (3 Replies)
Good evening everyone. I have my finals and I'm facing a problem:
I have a for cycle that is supposed to fork 2 children but somehow it forks only the first one.
What am I doing wrong ?
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>... (1 Reply)
Hi guys,
I have the following code:
int main(int argc, char *argv)
{
int pid1,pid2,i=0;
pid1=fork();
i+=2;
if(!pid1) i++;
if(i%3) pid2=fork();
if (pid2==0)
{
printf("sea \n ");
i-=1;
}
if(i>=2)... (4 Replies)
Discussion started by: pfpietro
4 Replies
LEARN ABOUT CENTOS
uuidd
UUIDD(8) System Administration UUIDD(8)NAME
uuidd - UUID generation daemon
SYNOPSIS
uuidd [options]
DESCRIPTION
The uuidd daemon is used by the UUID library to generate universally unique identifiers (UUIDs), especially time-based UUIDs, in a secure
and guaranteed-unique fashion, even in the face of large numbers of threads running on different CPUs trying to grab UUIDs.
OPTIONS -d, --debug
Run uuidd in debugging mode. This prevents uuidd from running as a daemon.
-h, --help
Display help screen and exit.
-k, --kill
If currently a uuidd daemon is running, kill it.
-n, --uuids number
When issuing a test request to a running uuidd, request a bulk response of number UUIDs.
-p, --pid path
Specify the pathname where the pid file should be written. By default, the pid file is written to /var/uuidd/uuidd.pid.
-P, --no-pid
Do not create pid file.
-F, --no-fork
Do not daemonize using double-fork.
-S, --socket-activation
Do not create the socket and instead expect it to be provided by the calling process. Implies --no-fork and --no-pid. As of this
writing, this option is supposed to be used only with systemd. This option must be enabled with a configure option.
-q, --quiet
Suppress some failure messages.
-r, --random
Test uuidd by trying to connect to a running uuidd daemon and request it to return a random-based UUID.
-s, --socket path
Specify the pathname used for the unix-domain socket used by uuidd. By default, the pathname used is /var/uuidd/request. This is
primarily for debugging purposes, since the pathname is hard-coded in the libuuid library.
-T, --timeout timeout
Specify a timeout for uuidd. If specified, then uuidd will exit after timeout seconds of inactivity.
-t, --time
Test uuidd by trying to connect to a running uuidd daemon and request it to return a time-based UUID.
-V, --version
Output version information and exit.
EXAMPLE
Start up a daemon, print 42 random keys, and then stop the daemon.
uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket
uuidd -d -r -n 42 -s /tmp/uuidd.socket
uuidd -d -k -s /tmp/uuidd.socket
AUTHOR
The uuidd daemon was written by Theodore Ts'o <tytso@mit.edu>.
AVAILABILITY
The uuidd daemon is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
SEE ALSO uuid(3), uuidgen(1)util-linux June 2011 UUIDD(8)
09-25-2009
. Thanks jp2542a.