11-16-2002
A daemon may or may not be associated to a terminal - by association we mean being able to writes its stderr and stdout to the terminal... on unix systems normally long running jobs, routine jobs and many administrative tasks are either daemons themselves or started by daemons... for example when you log on to a unix system thru telnet server on your machine, the telnetd daemon which continuously tiks on the host unix system takes your request and calls the init-getty-login-shell sequence... for example your shell is a daemon that can write its stderr and stdout to the terminal.. if you type a wrong command you can see the shell daemon write an error message...
Hope this helps...
Cheers!
Vishnu.
Last edited by Vishnu; 11-16-2002 at 06:35 AM..
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LEARN ABOUT OPENSOLARIS
tcgetsid
tcgetsid(3C) Standard C Library Functions tcgetsid(3C)
NAME
tcgetsid - get process group ID for session leader for controlling terminal
SYNOPSIS
#include <termios.h>
pid_t tcgetsid(int fildes);
DESCRIPTION
The tcgetsid() function obtains the process group ID of the session for which the terminal specified by fildes is the controlling terminal.
RETURN VALUES
Upon successful completion, tcgetsid() returns the process group ID associated with the terminal. Otherwise, a value of (pid_t)-1 is
returned and errno is set to indicate the error.
ERRORS
The tcgetsid() function will fail if:
EACCES The fildes argument is not associated with a controlling terminal.
EBADF The fildes argument is not a valid file descriptor.
ENOTTY The file associated with fildes is not a terminal.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
attributes(5), standards(5), termio(7I)
SunOS 5.11 14 Aug 2002 tcgetsid(3C)