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

NAME
       initgroups - initialize the supplementary group access list

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

ERRORS
       ENOMEM Insufficient memory to allocate group information	structure.

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

FILES
       /etc/group	   group database file

CONFORMING TO
       SVr4, 4.3BSD.

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

COLOPHON
       This  page  is  part of release 3.74 of the Linux man-pages project.  A
       description of the project, information about reporting bugs,  and  the
       latest	  version     of     this    page,    can    be	   found    at
       http://www.kernel.org/doc/man-pages/.

GNU				  2007-07-26			 INITGROUPS(3)

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

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