The Regents of the University of California. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software
must display the following acknowledgement:
This product includes software developed by the University of
California, Berkeley and its contributors.
4. Neither the name of the University nor the names of its contributors
may be used to endorse or promote products derived from this software
without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
@(#)setpgid.2 8.1 (Berkeley) 6/4/93
$FreeBSD: head/lib/libc/sys/setpgid.2 79531 2001-07-10 13:41:46Z ru $
.Dd June 4, 1993 .Dt SETPGID 2 .Os .Sh NAME .Nm setpgid , .Nm setpgrp .Nd set process group .Sh LIBRARY .Lb libc .Sh SYNOPSIS .Fd #include <unistd.h> .Ft int .Fn setpgid "pid_t pid" "pid_t pgrp" .Ft int .Fn setpgrp "pid_t pid" "pid_t pgrp" .Sh DESCRIPTION .Fn Setpgid sets the process group of the specified process .Fa pid to the specified .Fa pgrp . If .Fa pid is zero, then the call applies to the current process.
p If the invoker is not the super-user, then the affected process must have the same effective user-id as the invoker or be a descendant of the invoking process. .Sh RETURN VALUES .Fn Setpgid returns 0 when the operation was successful. If the request failed, -1 is returned and the global variable .Va errno indicates the reason. .Sh ERRORS .Fn Setpgid will fail and the process group will not be altered if: l -tag -width Er t Bq Er ESRCH The requested process does not exist. t Bq Er EPERM The effective user ID of the requested process is different from that of the caller and the process is not a descendent of the calling process. .El .Sh SEE ALSO .Xr getpgrp 2 .Sh STANDARDS The .Fn setpgid function call is expected to conform to .St -p1003.1-90 . .Sh COMPATIBILITY .Fn Setpgrp is identical to .Fn setpgid , and is retained for calling convention compatibility with historical versions of x .