/* $OpenBSD: getnetent.c,v 1.12 2006/01/17 15:37:58 millert Exp $ */ /* * Copyright (c) 1983, 1993 * The 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. 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. */ #include #include #include #include #include #include #include #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(int f) { if (netf == NULL) netf = fopen(_PATH_NETWORKS, "r" ); else rewind(netf); _net_stayopen |= f; } void endnetent(void) { if (netf) { fclose(netf); netf = NULL; } _net_stayopen = 0; } struct netent * getnetent(void) { char *p, *cp, **q; size_t len; if (netf == NULL && (netf = fopen(_PATH_NETWORKS, "r" )) == NULL) return (NULL); again: if ((p = fgetln(netf, &len)) == NULL) return (NULL); if (p[len-1] == '\n') len--; if (len >= sizeof(line) || len == 0) goto again; p = memcpy(line, p, len); line[len] = '\0'; if (*p == '#') goto again; if ((cp = strchr(p, '#')) != NULL) *cp = '\0'; net.n_name = p; if (strlen(net.n_name) >= MAXHOSTNAMELEN-1) net.n_name[MAXHOSTNAMELEN-1] = '\0'; 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; if (strlen(cp) >= MAXHOSTNAMELEN-1) cp[MAXHOSTNAMELEN-1] = '\0'; } cp = strpbrk(cp, " \t"); if (cp != NULL) *cp++ = '\0'; } *q = NULL; return (&net); }