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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)

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