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Diffstat (limited to 'man2/setsid.2')
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diff --git a/man2/setsid.2 b/man2/setsid.2 new file mode 100644 index 000000000..269032d72 --- /dev/null +++ b/man2/setsid.2 @@ -0,0 +1,63 @@ +.\" Copyright Michael Haardt (michael@cantor.informatik.rwth-aachen.de) Sat Aug 27 20:43:50 MET DST 1994 +.\" +.\" 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, write to the Free +.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, +.\" USA. +.\" +.\" Modified Sun Sep 11 19:19:05 1994 <faith@cs.unc.edu> +.\" Modified Mon Mar 25 10:19:00 1996 <aeb@cwi.nl> (merged a few +.\" tiny changes from a man page by Charles Livingston). +.\" Modified Sun Jul 21 14:45:46 1996 <aeb@cwi.nl> +.\" +.TH SETSID 2 1994-08-27 "Linux 1.0.0" "Linux Programmer's Manual" +.SH NAME +setsid \- creates a session and sets the process group ID +.SH SYNOPSIS +.ad l +.B #include <unistd.h> +.sp +.B pid_t setsid(void); +.br +.ad b +.SH DESCRIPTION +\fBsetsid()\fP creates a new session if the calling process is not a +process group leader. The calling process is the leader of the new +session, the process group leader of the new process group, and has no +controlling tty. The process group ID and session ID of the calling +process are set to the PID of the calling process. The calling process +will be the only process in this new process group and in this new session. +.SH "RETURN VALUE" +The session ID of the calling process. +.SH ERRORS +On error, \-1 will be returned. The only error which can happen is +EPERM. It is returned when the process group ID of any process +equals the PID of the calling process. Thus, in particular, +.B setsid +fails if the calling process is already a process group leader. +.SH NOTES +A process group leader is a process with process group ID equal +to its PID. In order to be sure that +.B setsid +will succeed, fork and exit, and have the child do +.BR setsid(). +.SH "CONFORMING TO" +POSIX, SVr4. +.SH "SEE ALSO" +.BR setpgid (2), +.BR setpgrp (2) |