freebsd man page for getnetgrent

GETNETGRENT(3)						   BSD Library Functions Manual 					    GETNETGRENT(3)

NAME
     getnetgrent, innetgr, setnetgrent, endnetgrent -- netgroup database operations

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <netdb.h>

     int
     getnetgrent(char **host, char **user, char **domain);

     int
     innetgr(const char *netgroup, const char *host, const char *user, const char *domain);

     void
     setnetgrent(const char *netgroup);

     void
     endnetgrent(void);

DESCRIPTION
     These functions operate on the netgroup database file /etc/netgroup which is described in netgroup(5).  The database defines a set of net-
     groups, each made up of one or more triples:

	   (host, user, domain)
     that defines a combination of host, user and domain.  Any of the three fields may be specified as ``wildcards'' that match any string.

     The function getnetgrent() sets the three pointer arguments to the strings of the next member of the current netgroup.  If any of the string
     pointers are (char *)0 that field is considered a wildcard.

     The functions setnetgrent() and endnetgrent() set the current netgroup and terminate the current netgroup respectively.  If setnetgrent() is
     called with a different netgroup than the previous call, an implicit endnetgrent() is implied.  The setnetgrent() function also sets the off-
     set to the first member of the netgroup.

     The function innetgr() searches for a match of all fields within the specified group.  If any of the host, user, or domain arguments are
     (char *)0 those fields will match any string value in the netgroup member.

RETURN VALUES
     The function getnetgrent() returns 0 for ``no more netgroup members'' and 1 otherwise.  The function innetgr() returns 1 for a successful
     match and 0 otherwise.  The functions setnetgrent() and endnetgrent() have no return value.

FILES
     /etc/netgroup  netgroup database file

COMPATIBILITY
     The netgroup members have three string fields to maintain compatibility with other vendor implementations, however it is not obvious what use
     the domain string has within BSD.

SEE ALSO
     netgroup(5)

BUGS
     The function getnetgrent() returns pointers to dynamically allocated data areas that are freed when the function endnetgrent() is called.

BSD
								   June 4, 1993 							       BSD