But what about a process started as nohup process and detached from controlling terminal ?
It has no terminal attached, I don't think it can be called as a daemon.
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)
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)
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)
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)
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)
Hi,
When process listing, I came across a process running as user daemon.
daemon 23576 23574 0 07:32:04 ? 0:07 oracle (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))
root 27526 27444 1 07:38:43 ttyp5 0:00 grep 23574
why a process runs as user daemon, when it should be... (3 Replies)
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 FREEBSD
tcsetpgrp
TCSETPGRP(3) BSD Library Functions Manual TCSETPGRP(3)NAME
tcsetpgrp -- set foreground process group ID
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <unistd.h>
int
tcsetpgrp(int fd, pid_t pgrp_id);
DESCRIPTION
If the process has a controlling terminal, the tcsetpgrp() function sets the foreground process group ID associated with the terminal device
to pgrp_id. The terminal device associated with fd must be the controlling terminal of the calling process and the controlling terminal must
be currently associated with the session of the calling process. The value of pgrp_id must be the same as the process group ID of a process
in the same session as the calling process.
RETURN VALUES
The tcsetpgrp() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi-
cate the error.
ERRORS
The tcsetpgrp() function will fail if:
[EBADF] The fd argument is not a valid file descriptor.
[EINVAL] An invalid value of pgrp_id was specified.
[ENOTTY] The calling process does not have a controlling terminal, or the file represented by fd is not the controlling terminal,
or the controlling terminal is no longer associated with the session of the calling process.
[EPERM] The pgrp_id argument does not match the process group ID of a process in the same session as the calling process.
SEE ALSO setpgid(2), setsid(2), tcgetpgrp(3)STANDARDS
The tcsetpgrp() function is expected to be compliant with the IEEE Std 1003.1-1988 (``POSIX.1'') specification.
BSD June 4, 1993 BSD