initgroups

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);

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.

RETURN VALUE
       The  initgroups()  function  returns  0	on success, or -1 if an error
       occurs.

ERRORS
       EPERM  The calling process does not have sufficient privileges.

       ENOMEM Insufficient memory to allocate group information structure.

FILES
       /etc/group	   group database file

CONFORMING TO
       SVID 3, BSD 4.3

NOTES
       The prototype for initgroups  is	 only  available  if  _BSD_SOURCE  is
       defined	 (either   explicitly,	 or   implicitly,   by	not  defining
       _POSIX_SOURCE or compiling with the -ansi flag).

SEE ALSO
       getgroups(2), setgroups(2)



GNU				  1993-04-05			INITGROUPS(3)