NAME
getnetgrent,
innetgr, setnetgrent,
endnetgrent —
netgroup database operations
LIBRARY
library “libc”
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 netgroups, each made up of one or more triples:(host, user, domain)
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. The setnetgrent() function 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
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
BUGS
The function getnetgrent() returns
pointers to dynamically allocated data areas that are freed when the
function endnetgrent() is called.