110 lines
3.4 KiB
Groff
110 lines
3.4 KiB
Groff
.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)setpgid.2 8.1 (Berkeley) 6/4/93
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.\"
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.Dd February 8, 2004
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.Dt SETPGID 2
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.Os
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.Sh NAME
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.Nm setpgid ,
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.Nm setpgrp
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.Nd set process group
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In unistd.h
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.Ft int
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.Fn setpgid "pid_t pid" "pid_t pgrp"
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.Ft int
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.Fn setpgrp "pid_t pid" "pid_t pgrp"
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.Sh DESCRIPTION
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The
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.Fn setpgid
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system call
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sets the process group of the specified process
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.Fa pid
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to the specified
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.Fa pgrp .
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If
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.Fa pid
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is zero, then the call applies to the current process.
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If
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.Fa pgrp
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is zero, then the process id of the process specified by
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.Fa pid
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is used instead.
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.Pp
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If the affected process is not the invoking process, then it must be a
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child of the invoking process, it must not have performed an
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.Xr exec 3
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operation, and both processes must be in the same session.
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The requested process group ID must already exist in the session of
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the caller, or it must be equal to the target process ID.
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.Sh RETURN VALUES
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.Rv -std setpgid
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.Sh COMPATIBILITY
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The
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.Fn setpgrp
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system call
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is identical to
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.Fn setpgid ,
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and is retained for calling convention compatibility with historical
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versions of
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.Bx .
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.Sh ERRORS
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The
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.Fn setpgid
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system call
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will fail and the process group will not be altered if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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The requested process group ID is not legal.
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.It Bq Er ESRCH
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The requested process does not exist.
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.It Bq Er ESRCH
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The target process is not the calling process or
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a child of the calling process.
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.It Bq Er EACCES
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The requested process is a child of the calling process,
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but it has performed an
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.Xr exec 3
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operation.
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.It Bq Er EPERM
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The target process is a session leader.
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.It Bq Er EPERM
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The requested process group ID is not in the session of the caller,
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and it is not equal to the process ID of the target process.
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.El
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.Sh SEE ALSO
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.Xr getpgrp 2
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.Sh STANDARDS
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The
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.Fn setpgid
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system call is expected to conform to
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.St -p1003.1-90 .
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