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GETNETGRENT(3)		     Library Functions Manual		  GETNETGRENT(3)

NAME
     getnetgrent,  innetgr, setnetgrent, endnetgrent -- netgroup database opera-
     tions

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <netdb.h>

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

     int
     getnetgrent_r(char **host, char **user, char **domain, char *buf,
	 size_t bufsize);

     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)
     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.  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 speci-
     fied  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
     netgroup(5)

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

FreeBSD 14.3			  June 5, 2016			  GETNETGRENT(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=getnetgrent&sektion=3&manpath=FreeBSD+14.3-RELEASE+and+Ports>

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