$NetBSD: initgroups.3,v 1.14 2003/05/01 13:58:03 wiz Exp $
Copyright (c) 1983, 1991, 1993
The Regents of the University of California. All rights reserved.
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@(#)initgroups.3 8.1 (Berkeley) 6/4/93
.Dd August 10, 2002 .Dt INITGROUPS 3 .Os .Sh NAME .Nm initgroups .Nd initialize supplementary group IDs .Sh LIBRARY .Lb libc .Sh SYNOPSIS n unistd.h .Ft int .Fn initgroups "const char *name" "gid_t basegid" .Sh DESCRIPTION The .Fn initgroups function uses the .Xr getgrouplist 3 function to calculate the supplementary group IDs for the user specified in .Fa name . This group list is then set up for the current process using .Xr setgroups 2 . The .Fa basegid is automatically included in the group list. Typically this value is given as the group number from the password file.
Copyright (c) 1983, 1991, 1993
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. 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.
@(#)initgroups.3 8.1 (Berkeley) 6/4/93
.Dd August 10, 2002 .Dt INITGROUPS 3 .Os .Sh NAME .Nm initgroups .Nd initialize supplementary group IDs .Sh LIBRARY .Lb libc .Sh SYNOPSIS n unistd.h .Ft int .Fn initgroups "const char *name" "gid_t basegid" .Sh DESCRIPTION The .Fn initgroups function uses the .Xr getgrouplist 3 function to calculate the supplementary group IDs for the user specified in .Fa name . This group list is then set up for the current process using .Xr setgroups 2 . The .Fa basegid is automatically included in the group list. Typically this value is given as the group number from the password file.
p If the groups database lists more than .Ev NGROUPS groups for .Fa name (including one for .Fa basegid ) , the later groups are ignored. .Sh RETURN VALUES The .Fn initgroups function returns -1 if it was not invoked by the super-user. .Sh SEE ALSO .Xr setgroups 2 , .Xr getgrouplist 3 .Sh HISTORY The .Fn initgroups function appeared in x 4.2 . .Sh BUGS The .Fn getgrouplist function called by .Fn initgroups uses the routines based on .Xr getgrent 3 . If the invoking program uses any of these routines, the group structure will be overwritten in the call to .Fn initgroups .