NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | FILES | CONFORMING TO | SEE ALSO | COLOPHON

INITGROUPS(3)                 Linux Programmer's Manual                 INITGROUPS(3)

NAME         top

       initgroups - initialize the supplementary group access list

SYNOPSIS         top

       #include <sys/types.h>
       #include <grp.h>

       int initgroups(const char *user, gid_t group);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       initgroups(): _BSD_SOURCE

DESCRIPTION         top

       The initgroups() function initializes the group access list by reading the
       group database /etc/group and using all groups of which user is a member.  The
       additional group group is also added to the list.

       The user argument must be non-NULL.

RETURN VALUE         top

       The initgroups() function returns 0 on success.  On error, -1 is returned, and
       errno is set appropriately.

ERRORS         top

       ENOMEM Insufficient memory to allocate group information structure.

       EPERM  The calling process has insufficient privilege.  See the underlying
              system call setgroups(2).

FILES         top

       /etc/group          group database file

CONFORMING TO         top

       SVr4, 4.3BSD.

SEE ALSO         top

       getgroups(2), setgroups(2), credentials(7)

COLOPHON         top

       This page is part of release 3.23 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

GNU                                   2007-07-26                        INITGROUPS(3)