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Diffstat (limited to 'resolv/getnetent.c')
| -rw-r--r-- | resolv/getnetent.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/resolv/getnetent.c b/resolv/getnetent.c new file mode 100644 index 0000000000..fb47c30c99 --- /dev/null +++ b/resolv/getnetent.c @@ -0,0 +1,161 @@ +/* + * Copyright (c) 1983 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* Portions Copyright (c) 1993 Carlos Leandro and Rui Salgueiro + * Dep. Matematica Universidade de Coimbra, Portugal, Europe + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * from getnetent.c 1.1 (Coimbra) 93/06/02 + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)getnetent.c 8.1 (Berkeley) 6/4/93"; +static char rcsid[] = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> + +#include <stdio.h> +#include <resolv.h> +#include <netdb.h> +#include <string.h> + +#ifndef _PATH_NETWORKS +#define _PATH_NETWORKS "/etc/networks" +#endif + +#define MAXALIASES 35 + +static FILE *netf; +static char line[BUFSIZ+1]; +static struct netent net; +static char *net_aliases[MAXALIASES]; +int _net_stayopen; + +void _setnetent __P((int)); +void _endnetent __P((void)); + +void +setnetent(stayopen) + int stayopen; +{ + + sethostent(stayopen); + _setnetent(stayopen); +} + +void +endnetent() +{ + + endhostent(); + _endnetent(); +} + +void +_setnetent(f) + int f; +{ + + if (netf == NULL) + netf = fopen(_PATH_NETWORKS, "r" ); + else + rewind(netf); + _net_stayopen |= f; +} + +void +_endnetent() +{ + + if (netf) { + fclose(netf); + netf = NULL; + } + _net_stayopen = 0; +} + +struct netent * +getnetent() +{ + char *p; + register char *cp, **q; + + if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) + return (NULL); +again: + p = fgets(line, BUFSIZ, netf); + if (p == NULL) + return (NULL); + if (*p == '#') + goto again; + cp = strpbrk(p, "#\n"); + if (cp == NULL) + goto again; + *cp = '\0'; + net.n_name = p; + cp = strpbrk(p, " \t"); + if (cp == NULL) + goto again; + *cp++ = '\0'; + while (*cp == ' ' || *cp == '\t') + cp++; + p = strpbrk(cp, " \t"); + if (p != NULL) + *p++ = '\0'; + net.n_net = inet_network(cp); + net.n_addrtype = AF_INET; + q = net.n_aliases = net_aliases; + if (p != NULL) + cp = p; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < &net_aliases[MAXALIASES - 1]) + *q++ = cp; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + } + *q = NULL; + return (&net); +} |