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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 ");
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}
if(i>=2)... (4 Replies)
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Good evening everyone. I have my finals and I'm facing a problem:
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What am I doing wrong ?
#include <fcntl.h>
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Hello everyone, this is my first post.
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4. Programming
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)
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5. Programming
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......
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6. Programming
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.
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7. UNIX for Dummies Questions & Answers
I have this little program ...
int main(void){
printf("Before");
fork();
printf("After");
}
output is this.....
BeforeAfterBeforeAfter
Shouldnt it be.....BeforeAfterAfter
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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)
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10. Programming
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)
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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.
-F, --no-fork
Do not daemonize using a double-fork.
-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, --no-pid
Do not create a pid file.
-p, --pid path
Specify the pathname where the pid file should be written. By default, the pid file is written to /run/uuidd/uuidd.pid.
-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-activation
Do not create a socket but instead expect it to be provided by the calling process. This implies --no-fork and --no-pid. This
option is intended to be used only with systemd(1). It needs to be enabled with a configure option.
-s, --socket path
Make uuidd use this pathname for the unix-domain socket. By default, the pathname used is /run/uuidd/request. This option is pri-
marily for debugging purposes, since the pathname is hard-coded in the libuuid library.
-T, --timeout number
Make uuidd exit after number 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.
-h, --help
Display help screen 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>.
SEE ALSO
uuid(3), uuidgen(1)
AVAILABILITY
The uuidd daemon is part of the util-linux package and is available from the Linux Kernel Archive <https://www.kernel.org/pub/linux/utils
/util-linux/>.
util-linux July 2014 UUIDD(8)