NAME
getnetgrent,
innetgr, setnetgrent,
endnetgrent —
netgroup database operations
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 /etc/netgroup.db which is described in netgroup(5). If that file does not exist, and the system supports YP, then the netgroup YP databases are used instead. 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
NULL, those fields are considered wildcards.
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” or 1 otherwise. The function
innetgr() returns 1 for a successful match or 0
otherwise. The functions setnetgrent() and
endnetgrent() have no return value.
FILES
- /etc/netgroup.db
- netgroup database file
SEE ALSO
BUGS
The function getnetgrent() returns
pointers to dynamically allocated data areas that are
free(3)'d when
the function endnetgrent() is called.