getsid(2) [sunos man page]

getsid(2)							   System Calls 							 getsid(2)

NAME

       getsid - get process group ID of session leader

SYNOPSIS

       #include <unistd.h>

       pid_t getsid(pid_t pid);

DESCRIPTION

       The  getsid()  function	obtains the process group ID of the process that is the session leader of the process specified by pid.  If pid is
       (pid_t)0, it specifies the calling process.

RETURN VALUES

       Upon successful completion, getsid() returns the process group ID of the session leader of the specified  process.  Otherwise,  it  returns
       (pid_t)-1 and sets errno to indicate the error.

ERRORS

       The getsid() function will fail if:

       EPERM	       The  process  specified	by  pid  is  not in the same session as the calling process, and the implementation does not allow
		       access to the process group ID of the session leader of that process from the calling process.

       ESRCH	       There is no process with a process ID equal to pid.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       exec(2), fork(2), getpid(2), getpgid(2), setpgid(2), setsid(2), attributes(5), standards(5)

SunOS 5.10							    22 Jan 1996 							 getsid(2)

GETSID(P)						     POSIX Programmer's Manual							 GETSID(P)

NAME

       getsid - get the process group ID of a session leader

SYNOPSIS

       #include <unistd.h>

       pid_t getsid(pid_t pid);

DESCRIPTION

       The  getsid()  function shall obtain the process group ID of the process that is the session leader of the process specified by pid. If pid
       is (pid_t)0, it specifies the calling process.

RETURN VALUE

       Upon successful completion, getsid() shall return the process group ID of the session leader of the specified process.  Otherwise, it shall
       return (pid_t)-1 and set errno to indicate the error.

ERRORS

       The getsid() function shall fail if:

       EPERM  The  process specified by pid is not in the same session as the calling process, and the implementation does not allow access to the
	      process group ID of the session leader of that process from the calling process.

       ESRCH  There is no process with a process ID equal to pid.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       exec() , fork() , getpid() , getpgid() , setpgid() , setsid() , the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and  the  original  IEEE
       and  The  Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								 GETSID(P)