.\" Copyright (c) 1983 The Regents of the University of California. .\" All rights reserved. .\" .\" Redistribution and use in source and binary forms are permitted provided .\" that: (1) source distributions retain this entire copyright notice and .\" comment, and (2) distributions including binaries display the following .\" acknowledgement: ``This product includes software developed by the .\" University of California, Berkeley and its contributors'' in the .\" documentation or other materials provided with the distribution and in .\" all advertising materials mentioning features or use of this software. .\" 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. .\" .\" @(#)setgroups.2 6.6 (Berkeley) 6/23/90 .\" .TH SETGROUPS 2 "June 23, 1990" .UC 5 .SH NAME setgroups \- set group access list .SH SYNOPSIS .nf .ft B #include <sys/param.h> .PP .ft B setgroups(ngroups, gidset) int ngroups, *gidset; .fi .SH DESCRIPTION .I Setgroups sets the group access list of the current user process according to the array .IR gidset . The parameter .I ngroups indicates the number of entries in the array and must be no more than NGROUPS, as defined in .RI < sys/param.h >. .PP Only the super-user may set new groups. .SH "RETURN VALUE A 0 value is returned on success, \-1 on error, with a error code stored in \fIerrno\fP. .SH "ERRORS The \fIsetgroups\fP call will fail if: .TP 15 [EPERM] The caller is not the super-user. .TP 15 [EFAULT] The address specified for \fIgidset\fP is outside the process address space. .SH "SEE ALSO getgroups(2), initgroups(3) .SH BUGS The .I gidset array should be of type .BR gid_t , but remains integer for compatibility with earlier systems.