1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" %%%LICENSE_START(VERBATIM)
4 .\" Permission is granted to make and distribute verbatim copies of this
5 .\" manual provided the copyright notice and this permission notice are
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8 .\" Permission is granted to copy and distribute modified versions of this
9 .\" manual under the conditions for verbatim copying, provided that the
10 .\" entire resulting derived work is distributed under the terms of a
11 .\" permission notice identical to this one.
13 .\" Since the Linux kernel and libraries are constantly changing, this
14 .\" manual page may be incorrect or out-of-date. The author(s) assume no
15 .\" responsibility for errors or omissions, or for damages resulting from
16 .\" the use of the information contained herein. The author(s) may not
17 .\" have taken the same level of care in the production of this manual,
18 .\" which is licensed free of charge, as they might when working
21 .\" Formatted or processed versions of this manual, if unaccompanied by
22 .\" the source, must acknowledge the copyright and authors of this work.
25 .\" References consulted:
26 .\" Linux libc source code
27 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
29 .\" Modified 1993-07-24 by Rik Faith <faith@cs.unc.edu>
30 .\" Modified 2004-10-10 by aeb
32 .TH INITGROUPS 3 2007-07-26 "GNU" "Linux Programmer's Manual"
34 initgroups \- initialize the supplementary group access list
37 .B #include <sys/types.h>
40 .BI "int initgroups(const char *" user ", gid_t " group );
44 Feature Test Macro Requirements for glibc (see
45 .BR feature_test_macros (7)):
53 function initializes the group access list by
54 reading the group database
56 and using all groups of
63 also added to the list.
67 argument must be non-NULL.
71 function returns 0 on success.
72 On error, \-1 is returned, and
78 Insufficient memory to allocate group information structure.
81 The calling process has insufficient privilege.
82 See the underlying system call
86 \fI/etc/group\fP group database file
95 This page is part of release 3.78 of the Linux
98 A description of the project,
99 information about reporting bugs,
100 and the latest version of this page,
102 \%http://www.kernel.org/doc/man\-pages/.