getnetgrent, setnetgrent, endnetgrent, innetgr - Get network group
char *domain ); void setnetgrent(
char *netgroup ); void endnetgrent(
void ); int getnetgrent(
char **domainp );
Standard C Library (libc.so, libc.a)
The innetgr() routine accesses the netgroup file and checks to see if
the specified input parameters match an entry in the file. The routine
returns 1 if it matches an entry, or 0 if it does not. Any of the three
strings; machine, user, or domain can be NULL, which signifies any
string in that position is valid.
The getnetgrent() routine returns the next member of a network group.
After the call, machinep will contain a pointer to a string containing
the name of the machine part of the network group member, and similarly
for userp and domainp. If machinep, userp or domainp is returned as a
NULL pointer, it signifies any string is valid. The getnetgrent routine
allocates space for the name by using the malloc routine. This space
is released when an endnetgrent() call is made. The getnetgrent() rou‐
tine returns 1 if it succeeds in obtaining another member of the net‐
work group, or 0 if it reaches the end of the group.
The setnetgrent() routine establishes the network group from which get‐
netgrent() will obtain members, and also restarts calls to getnet‐
grent() from the beginning of the list. If the previous setnetgrent()
call was to a different network group, an endnetgrent() call is
The endnetgrent() routine releases the space allocated during the get‐
Note that the netgroup file is distributed by NIS and exists in its
original, readable form on the NIS master server only. NIS slave
servers distribute copies of the netgroup maps created from the origi‐
nal on the master.