1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.Dd October 26, 2014 29.Dt INITGROUPS 3 30.Os 31.Sh NAME 32.Nm initgroups 33.Nd initialize group access list 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In unistd.h 38.Ft int 39.Fn initgroups "const char *name" "gid_t basegid" 40.Sh DESCRIPTION 41The 42.Fn initgroups 43function 44uses the 45.Xr getgrouplist 3 46function to calculate the group access list for the user 47specified in 48.Fa name . 49This group list is then setup for the current process using 50.Xr setgroups 2 . 51The 52.Fa basegid 53is automatically included in the groups list. 54Typically this value is given as 55the group number from the password file. 56.Sh RETURN VALUES 57.Rv -std initgroups 58.Sh ERRORS 59The 60.Fn initgroups 61function may fail and set 62.Va errno 63for any of the errors specified for the library function 64.Xr setgroups 2 . 65It may also return: 66.Bl -tag -width Er 67.It Bq Er ENOMEM 68The 69.Fn initgroups 70function was unable to allocate temporary storage. 71.El 72.Sh SEE ALSO 73.Xr setgroups 2 , 74.Xr getgrouplist 3 75.Sh HISTORY 76The 77.Fn initgroups 78function appeared in 79.Bx 4.2 . 80