NAME
getnetgrent,
innetgr,
setnetgrent,
endnetgrent —
netgroup database operations
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <netgroup.h>
int
getnetgrent(
const
char **host,
const char
**user,
const 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 which is described in
netgroup(5).
The database defines a set of netgroups, each made up of one or more triples:
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
NULL
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.
setnetgrent()
also sets the offset 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
NULL
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
SEE ALSO
netgroup(5),
nsswitch.conf(5)
BUGS
The function
getnetgrent() returns pointers to dynamically
allocated data areas that are free'd when the function
endnetgrent() is called.