getsid — get session ID
returns the session ID of the calling process.
getsid(p) returns the session
ID of the process with process ID
p. (The session ID of a
process is the process group ID of the session leader.)
On success, a session ID is returned. On error,
(pid_t) −1 will
be returned, and
errno is set
A process with process ID
p exists, but it is not
in the same session as the calling process, and the
implementation considers this an error.
No process with process ID
p was found.
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Copyright (C) 1996 Andries Brouwer (aebcwi.nl)
This is free documentation; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
The GNU General Public License's references to "object code"
and "executables" are to be interpreted as the output of any
document formatting or typesetting system, including
intermediate and printed output.
This manual is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this manual; if not, see
Modified Thu Oct 31 14:18:40 1996 by Eric S. Raymond <esry\thyrsus.com>
Modified 2001-12-17, aeb