usr/src/lib/libc/net/getnetent.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getnetent.c	5.5 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <ctype.h>

#define	MAXALIASES	35

static char NETDB[] = "/etc/networks";
static FILE *netf = NULL;
static char line[BUFSIZ+1];
static struct netent net;
static char *net_aliases[MAXALIASES];
int _net_stayopen;
static char *any();

setnetent(f)
	int f;
{
	if (netf == NULL)
		netf = fopen(NETDB, "r" );
	else
		rewind(netf);
	_net_stayopen |= f;
}

endnetent()
{
	if (netf) {
		fclose(netf);
		netf = NULL;
	}
	_net_stayopen = 0;
}

struct netent *
getnetent()
{
	char *p;
	register char *cp, **q;

	if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)
		return (NULL);
again:
	p = fgets(line, BUFSIZ, netf);
	if (p == NULL)
		return (NULL);
	if (*p == '#')
		goto again;
	cp = any(p, "#\n");
	if (cp == NULL)
		goto again;
	*cp = '\0';
	net.n_name = p;
	cp = any(p, " \t");
	if (cp == NULL)
		goto again;
	*cp++ = '\0';
	while (*cp == ' ' || *cp == '\t')
		cp++;
	p = any(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 = any(cp, " \t");
		if (cp != NULL)
			*cp++ = '\0';
	}
	*q = NULL;
	return (&net);
}

static char *
any(cp, match)
	register char *cp;
	char *match;
{
	register char *mp, c;

	while (c = *cp) {
		for (mp = match; *mp; mp++)
			if (*mp == c)
				return (cp);
		cp++;
	}
	return ((char *)0);
}
Commit	Line	Data
	1	/*
	2	* Copyright (c) 1983 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
	16	*/
	17
	18	#if defined(LIBC_SCCS) && !defined(lint)
	19	static char sccsid[] = "@(#)getnetent.c 5.5 (Berkeley) %G%";
	20	#endif /* LIBC_SCCS and not lint */
	21
	22	#include <stdio.h>
	23	#include <sys/types.h>
	24	#include <sys/socket.h>
	25	#include <netdb.h>
	26	#include <ctype.h>
	27
	28	#define MAXALIASES 35
	29
	30	static char NETDB[] = "/etc/networks";
	31	static FILE *netf = NULL;
	32	static char line[BUFSIZ+1];
	33	static struct netent net;
	34	static char *net_aliases[MAXALIASES];
	35	int _net_stayopen;
	36	static char *any();
	37
	38	setnetent(f)
	39	int f;
	40	{
	41	if (netf == NULL)
	42	netf = fopen(NETDB, "r" );
	43	else
	44	rewind(netf);
	45	_net_stayopen \|= f;
	46	}
	47
	48	endnetent()
	49	{
	50	if (netf) {
	51	fclose(netf);
	52	netf = NULL;
	53	}
	54	_net_stayopen = 0;
	55	}
	56
	57	struct netent *
	58	getnetent()
	59	{
	60	char *p;
	61	register char cp, *q;
	62
	63	if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)
	64	return (NULL);
	65	again:
	66	p = fgets(line, BUFSIZ, netf);
	67	if (p == NULL)
	68	return (NULL);
	69	if (*p == '#')
	70	goto again;
	71	cp = any(p, "#\n");
	72	if (cp == NULL)
	73	goto again;
	74	*cp = '\0';
	75	net.n_name = p;
	76	cp = any(p, " \t");
	77	if (cp == NULL)
	78	goto again;
	79	*cp++ = '\0';
	80	while (cp == ' ' \|\| cp == '\t')
	81	cp++;
	82	p = any(cp, " \t");
	83	if (p != NULL)
	84	*p++ = '\0';
	85	net.n_net = inet_network(cp);
	86	net.n_addrtype = AF_INET;
	87	q = net.n_aliases = net_aliases;
	88	if (p != NULL)
	89	cp = p;
	90	while (cp && *cp) {
	91	if (cp == ' ' \|\| cp == '\t') {
	92	cp++;
	93	continue;
	94	}
	95	if (q < &net_aliases[MAXALIASES - 1])
	96	*q++ = cp;
	97	cp = any(cp, " \t");
	98	if (cp != NULL)
	99	*cp++ = '\0';
	100	}
	101	*q = NULL;
	102	return (&net);
	103	}
	104
	105	static char *
	106	any(cp, match)
	107	register char *cp;
	108	char *match;
	109	{
	110	register char *mp, c;
	111
	112	while (c = *cp) {
	113	for (mp = match; *mp; mp++)
	114	if (*mp == c)
	115	return (cp);
	116	cp++;
	117	}
	118	return ((char *)0);
	119	}