initgroups(3) [bsd man page]

INITGROUPS(3)						     Library Functions Manual						     INITGROUPS(3)

NAME

       initgroups - initialize group access list

SYNOPSIS

       initgroups(name, basegid)
       char *name;
       int basegid;

DESCRIPTION

       Initgroups  reads  through  the	group file and sets up, using the setgroups(2) call, the group access list for the user specified in name.
       The basegid is automatically included in the groups list.  Typically this value is given as the group number from the password file.

FILES

       /etc/group

SEE ALSO

       setgroups(2)

DIAGNOSTICS

       Initgroups returns -1 if it was not invoked by the super-user.

BUGS

       Initgroups uses the routines based on getgrent(3).  If the invoking program uses any of these routines, the group structure will  be  over-
       written in the call to initgroups.

4.2 Berkeley Distribution					   May 12, 1986 						     INITGROUPS(3)

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

NAME

       initgroups - initialize the supplementary group access list

SYNOPSIS

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