MirOS Manual: getsid(2)

GETSID(2)                  BSD Programmer's Manual                   GETSID(2)

NAME

     getsid - get process session

SYNOPSIS

     #include <unistd.h>

     pid_t
     getsid(pid_t pid);

DESCRIPTION

     The session ID of the process identified by pid is returned by getsid().
     If pid is zero, getsid() returns the session ID of the current process.

RETURN VALUES

     Upon successful completion, the function getsid() returns the session ID
     of the specified process; otherwise, it returns a value of -1 and sets
     errno to indicate an error.

ERRORS

     getsid() will succeed unless:

     [EPERM]       The current process and the process pid are not in the same
                   session.

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

SEE ALSO

     getpgid(2), getpgrp(2), setpgid(2), setsid(2), termios(4)

HISTORY

     The getsid() function call is derived from its usage in AT&T System V
     UNIX, and is mandated by X/Open Portability Guide Issue 4 ("XPG4").

MirOS BSD #10-current          August 19, 1997                               1

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