Add in getprotobyname, getservicebyname, and related junk

1 files changed, 176 insertions, 0 deletions

diff --git a/libc/inet/getservice.c b/libc/inet/getservice.c
new file mode 100644
index 000000000..dee6c83f7
--- /dev/null
+++ b/libc/inet/getservice.c
@@ -0,0 +1,176 @@
+/*
+** services.c                           /etc/services access functions
+**
+** This file is part of the NYS Library.
+**
+** The NYS Library is free software; you can redistribute it and/or
+** modify it under the terms of the GNU Library General Public License as
+** published by the Free Software Foundation; either version 2 of the
+** License, or (at your option) any later version.
+**
+** The NYS Library is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+** Library General Public License for more details.
+** 
+** You should have received a copy of the GNU Library General Public
+** License along with the NYS Library; see the file COPYING.LIB.  If
+** not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+** Cambridge, MA 02139, USA.
+**
+**
+** 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.
+*/
+
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define	MAXALIASES	35
+
+static FILE *servf = NULL;
+static char line[BUFSIZ+1];
+static struct servent serv;
+static char *serv_aliases[MAXALIASES];
+static int serv_stayopen;
+
+void setservent(int f)
+{
+	if (servf == NULL)
+		servf = fopen(_PATH_SERVICES, "r" );
+	else
+		rewind(servf);
+	serv_stayopen |= f;
+}
+
+void endservent(void)
+{
+	if (servf) {
+		fclose(servf);
+		servf = NULL;
+	}
+	serv_stayopen = 0;
+}
+
+struct servent * getservent(void)
+{
+	char *p;
+	register char *cp, **q;
+
+	if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL)
+		return (NULL);
+again:
+	if ((p = fgets(line, BUFSIZ, servf)) == NULL)
+		return (NULL);
+	if (*p == '#')
+		goto again;
+	cp = strpbrk(p, "#\n");
+	if (cp == NULL)
+		goto again;
+	*cp = '\0';
+	serv.s_name = p;
+	p = strpbrk(p, " \t");
+	if (p == NULL)
+		goto again;
+	*p++ = '\0';
+	while (*p == ' ' || *p == '\t')
+		p++;
+	cp = strpbrk(p, ",/");
+	if (cp == NULL)
+		goto again;
+	*cp++ = '\0';
+	serv.s_port = htons((u_short)atoi(p));
+	serv.s_proto = cp;
+	q = serv.s_aliases = serv_aliases;
+	cp = strpbrk(cp, " \t");
+	if (cp != NULL)
+		*cp++ = '\0';
+	while (cp && *cp) {
+		if (*cp == ' ' || *cp == '\t') {
+			cp++;
+			continue;
+		}
+		if (q < &serv_aliases[MAXALIASES - 1])
+			*q++ = cp;
+		cp = strpbrk(cp, " \t");
+		if (cp != NULL)
+			*cp++ = '\0';
+	}
+	*q = NULL;
+	return (&serv);
+}
+
+
+struct servent *getservbyname(const char *name, const char *proto)
+{
+	register struct servent *p;
+	register char **cp;
+
+	setservent(serv_stayopen);
+	while ((p = getservent()) != NULL) {
+		if (strcmp(name, p->s_name) == 0)
+			goto gotname;
+		for (cp = p->s_aliases; *cp; cp++)
+			if (strcmp(name, *cp) == 0)
+				goto gotname;
+		continue;
+gotname:
+		if (proto == 0 || strcmp(p->s_proto, proto) == 0)
+			break;
+	}
+	if (!serv_stayopen)
+		endservent();
+	return (p);
+}
+
+
+struct servent * getservbyport(int port, const char *proto)
+{
+	register struct servent *p;
+
+	setservent(serv_stayopen);
+	while ((p = getservent()) != NULL) {
+		if (p->s_port != port)
+			continue;
+		if (proto == 0 || strcmp(p->s_proto, proto) == 0)
+			break;
+	}
+	if (!serv_stayopen)
+		endservent();
+	return (p);
+}