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.\" @(#)initgroups.3 8.1 (Berkeley) 6/4/93 29.\" 30.Dd October 26, 2014 31.Dt INITGROUPS 3 32.Os 33.Sh NAME 34.Nm initgroups 35.Nd initialize group access list 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In unistd.h 40.Ft int 41.Fn initgroups "const char *name" "gid_t basegid" 42.Sh DESCRIPTION 43The 44.Fn initgroups 45function 46uses the 47.Xr getgrouplist 3 48function to calculate the group access list for the user 49specified in 50.Fa name . 51This group list is then setup for the current process using 52.Xr setgroups 2 . 53The 54.Fa basegid 55is automatically included in the groups list. 56Typically this value is given as 57the group number from the password file. 58.Sh RETURN VALUES 59.Rv -std initgroups 60.Sh ERRORS 61The 62.Fn initgroups 63function may fail and set 64.Va errno 65for any of the errors specified for the library function 66.Xr setgroups 2 . 67It may also return: 68.Bl -tag -width Er 69.It Bq Er ENOMEM 70The 71.Fn initgroups 72function was unable to allocate temporary storage. 73.El 74.Sh SEE ALSO 75.Xr setgroups 2 , 76.Xr getgrouplist 3 77.Sh HISTORY 78The 79.Fn initgroups 80function appeared in 81.Bx 4.2 . 82