GETNETGRENT(3) BSD Library Functions Manual GETNETGRENT(3)NAME
getnetgrent, innetgr, setnetgrent, endnetgrent — netgroup database opera‐
Standard C Library (libc, -lc)
getnetgrent(char **host, char **user, char **domain);
innetgr(const char *netgroup, const char *host, const char *user,
const char *domain);
setnetgrent(const char *netgroup);
These functions operate on the netgroup database file /etc/netgroup which
is described in netgroup(5). The database defines a set of netgroups,
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.
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
/etc/netgroup netgroup database file
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.
The function getnetgrent() returns pointers to dynamically allocated data
areas that are freed when the function endnetgrent() is called.
BSD June 4, 1993 BSD