03-07-2002
A second explanation, not as detailed
For simple unix programmers like me, a daemon is just a process that runs in the background, usually waiting for something to happen that it is capable of working with, like a printer daemon is waiting for print commands.
10 More Discussions You Might Find Interesting
1. Programming
Hi,
I have to write a daemon process, which performs certain operations in the background.
Now since it performs operations in the background, it should not display anything to the standard output.
The problem is that it still displays, text on standard output.
Can anyone tell me (it is... (2 Replies)
Discussion started by: s_chordia
2 Replies
2. UNIX for Advanced & Expert Users
My daemon process is the child of init and init has the responsibility to remove it, once it turns zombie. But I want to ask why the daemon process which is child of init turns zombie in the first place. What measures I have to take to avoid this?
rish (1 Reply)
Discussion started by: rish2005
1 Replies
3. Linux
how i will write the daemon process,if any body have sample daemon process send me. (1 Reply)
Discussion started by: suresh_rupineni
1 Replies
4. Shell Programming and Scripting
Hello,
I need to run a command on remote Linux using the ssh command from my local machine. I am able to execute the command on remote machine using ssh but it's behaving strangely.
The command is supposed to start a daemon process on remote linux box and the control should return back to me... (5 Replies)
Discussion started by: nitinshukla
5 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I am new to this forum and this is my first post here...
I have never worked on either Pro*C or Multithreading..Now, i have to write a Pro*C, Multithreading daemon process.. I dont know where to start.. Can anybody help me with examples?
1. need to write a Pro*C multithreading... (0 Replies)
Discussion started by: kachiraju
0 Replies
6. Programming
I have a scenario where I need to find if a process is a daemon process or not. This check needs to be done from within the process. I know there are no direct API's to do so. I have explored these options.
1. ctermid() - this can be unsuccessful as per the man pages
2. int devtty; if ((devtty... (7 Replies)
Discussion started by: vino
7 Replies
7. Shell Programming and Scripting
Dear Unix Gurus,
Plz provide major diff between background process and daemon process.
Is it control available for daemon process?. (3 Replies)
Discussion started by: kkl
3 Replies
8. UNIX for Advanced & Expert Users
Hi All,
I am facing problem in launching a application with the help of a daemon process. Actually the application is based on command line that reads various commands for controlling the application from the console and accordingly executes those commands. The application always interact with... (3 Replies)
Discussion started by: gopallinux
3 Replies
9. Shell Programming and Scripting
Hi,
HI ,
I have a simple script that moves files from one folder to another folder, I have already done the open-ssh server settings and the script is working fine and is able to transfer the files from one folder to another but right now I myself execute this script by using my creditianls to... (3 Replies)
Discussion started by: nks342
3 Replies
10. Programming
I wish to make a process run in the background, but only one instance of it, and not many,
so when the program is loaded, it has to check whether another instance of the same
program is running and if so to exit. How do I do this ? (4 Replies)
Discussion started by: sundaresh
4 Replies
LEARN ABOUT OPENSOLARIS
thr_join
thr_join(3C) Standard C Library Functions thr_join(3C)
NAME
thr_join - wait for thread termination
SYNOPSIS
cc -mt [ flag... ] file...[ library... ]
#include <thread.h>
int thr_join(thread_t thread, thread_t *departed, void **status);
DESCRIPTION
The thr_join() function suspends processing of the calling thread until the target thread completes. The thread argument must be a member
of the current process and cannot be a detached thread. See thr_create(3C).
If two or more threads wait for the same thread to complete, all will suspend processing until the thread has terminated, and then one
thread will return successfully and the others will return with an error of ESRCH. The thr_join() function will not block processing of the
calling thread if the target thread has already terminated.
If a thr_join() call returns successfully with a non-null status argument, the value passed to thr_exit(3C) by the terminating thread will
be placed in the location referenced by status.
If the target thread ID is 0, thr_join() finds and returns the status of a terminated undetached thread in the process. If no such thread
exists, it suspends processing of the calling thread until a thread for which no other thread is waiting enters that state, at which time
it returns successfully, or until all other threads in the process are either daemon threads or threads waiting in thr_join(), in which
case it returns EDEADLK. See NOTES.
If departed is not NULL, it points to a location that is set to the ID of the terminated thread if thr_join() returns successfully.
RETURN VALUES
If successful, thr_join() returns 0. Otherwise, an error number is returned to indicate the error.
ERRORS
EDEADLK A joining deadlock would occur, such as when a thread attempts to wait for itself, or the calling thread is waiting for any
thread to exit and only daemon threads or waiting threads exist in the process.
ESRCH No undetached thread could be found corresponding to the given thread ID.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
thr_create(3C), thr_exit(3C), wait(3C), attributes(5), standards(5)
NOTES
Using thr_join(3C) in the following syntax,
while (thr_join(0, NULL, NULL) == 0);
will wait for the termination of all non-daemon threads, excluding threads that are themselves waiting in thr_join().
SunOS 5.11 27 Mar 2000 thr_join(3C)