getnetent(3n) [ultrix man page]
getnetent(3n) getnetent(3n) Name getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent - get networks entry Syntax #include <netdb.h> struct netent *getnetent() struct netent *getnetbyname(name) char *name; struct netent *getnetbyaddr(net, type) long net; int type; void setnetent(stayopen) int stayopen; void endnetent() Description The and subroutines each return a pointer to an object with the following structure containing the broken-out fields of a line in the data- base. struct netent { char *n_name; /* official name of net */ char **n_aliases; /* alias list */ int n_addrtype; /* net number type */ long n_net; /* net number */ }; The members of this structure are: n_name The official name of the network. n_aliases A zero terminated list of alternate names for the network. n_addrtype The type of the network number returned: AF_INET. n_net The network number. Network numbers are returned in machine byte order. If the stayopen flag on a subroutine is NULL, the database is opened. Otherwise the has the effect of rewinding the database. The may be called to close the database when processing is complete. The subroutine simply reads the next line while and search until a matching name or net number is found (or until EOF is encountered). The type must be AF_INET. The subroutine keeps a pointer in the database, allowing successive calls to be used to search the entire file. A call to must be made before a loop using in order to perform initialization and an must be used after the loop. Both and make calls to and Restrictions All information is contained in a static area so it must be copied if it is to be saved. Only Internet network numbers are currently understood. If YP is running, does not return the entries in any particular order. See the Guide to the Yellow Pages Service for setup information. The networks database may also be distributed via the BIND/Hesiod naming service. See the Guide to the BIND/Hesiod Service for more infor- mation. Return Values Null pointer(0) returned on EOF or error. Files See Also networks(5), svc.conf(5) Guide to the BIND/Hesiod Service Guide to the Yellow Pages Service getnetent(3n)
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getnetent(3n) getnetent(3n) Name getnetent, getnetbyaddr, getnetbyname, setnetent, endnetent - get networks entry Syntax #include <netdb.h> struct netent *getnetent() struct netent *getnetbyname(name) char *name; struct netent *getnetbyaddr(net, type) long net; int type; void setnetent(stayopen) int stayopen; void endnetent() Description The and subroutines each return a pointer to an object with the following structure containing the broken-out fields of a line in the data- base. struct netent { char *n_name; /* official name of net */ char **n_aliases; /* alias list */ int n_addrtype; /* net number type */ long n_net; /* net number */ }; The members of this structure are: n_name The official name of the network. n_aliases A zero terminated list of alternate names for the network. n_addrtype The type of the network number returned: AF_INET. n_net The network number. Network numbers are returned in machine byte order. If the stayopen flag on a subroutine is NULL, the database is opened. Otherwise the has the effect of rewinding the database. The may be called to close the database when processing is complete. The subroutine simply reads the next line while and search until a matching name or net number is found (or until EOF is encountered). The type must be AF_INET. The subroutine keeps a pointer in the database, allowing successive calls to be used to search the entire file. A call to must be made before a loop using in order to perform initialization and an must be used after the loop. Both and make calls to and Restrictions All information is contained in a static area so it must be copied if it is to be saved. Only Internet network numbers are currently understood. If YP is running, does not return the entries in any particular order. See the Guide to the Yellow Pages Service for setup information. The networks database may also be distributed via the BIND/Hesiod naming service. See the Guide to the BIND/Hesiod Service for more infor- mation. Return Values Null pointer(0) returned on EOF or error. Files See Also networks(5), svc.conf(5) Guide to the BIND/Hesiod Service Guide to the Yellow Pages Service getnetent(3n)