69 lines
2.7 KiB
Groff
69 lines
2.7 KiB
Groff
.\" Copyright (c) 1994 Winning Strategies, Inc.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Winning Strategies, Inc.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $Id: setsid.2,v 1.1 1994/04/15 22:48:03 jtc Exp $
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.\"
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.Dd April 15, 1994
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.Dt SETSID 2
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.Os
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.Sh NAME
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.Nm setsid
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.Nd set session ID
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <unistd.h>
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.Ft pid_t
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.Fn setsid
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.Sh DESCRIPTION
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If the current process is not a process group leader,
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.Fn setsid
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sets the process group ID and the session ID of the current process to
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the process ID of the current process, and releases the process's
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controlling terminal.
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.Sh RETURN VALUES
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Upon successful completion, the session ID of the current process is returned.
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Otherwise, a value of (pid_t) \-1 is returned and
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.Va errno
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is set to indicate the error.
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.Sh ERRORS
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.Fn setsid
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will fail and return an error if the following is true:
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.Bl -tag -width Er
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.It Bq Er EPERM
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The current process is already a process group leader,
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or there are other processes whose process group ID is equal to the
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process ID of the current process.
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.El
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.Sh SEE ALSO
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.Xr getpid 2 ,
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.Xr setpgid 2
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.Sh STANDARDS
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.Fn setsid
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is expected to conform to
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.St -p1003.1-90 .
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