GETSID(D)           Linux Programmer's Manual           GETSID(D)



NAME
       getsid - get session ID

SYNOPSIS
       #include <unistd.h>

       pid_t getsid(pid_t pid);

DESCRIPTION
       getsid(d)  returns  the session ID of the calling process.
       getsid(d) returns the session ID of the process with  pro-
       cess  ID  p.   (The session ID of a process is the process
       group ID of the session leader.)   On  error,  (pid_t)  -1
       will be returned, and errno is set appropriately.

ERRORS
       EPERM  A  process  with process ID p exists, but it is not
              in the same session as the current process, and the
              implementation considers this an error.

       ESRCH  No process with process ID p was found.

CONFORMING TO
       SVr4, POSIX 1003.1-2001.

NOTES
       Linux does not return EPERM.

       Linux  has  this system call since Linux 1.3.44.  There is
       libc support since libc 5.2.19.

       To  get   the   prototype   under   glibc,   define   both
       _XOPEN_SOURCE  and _XOPEN_SOURCE_EXTENDED, or use "#define
       _XOPEN_SOURCE n" for some integer n larger than  or  equal
       to 500.

SEE ALSO
       getpgid(d), setsid(d)



Linux 2.5.0                 2001-12-17                  GETSID(D)