[unix-history] / lib / libc / net / getservent.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[] = "@(#)getservent.c	5.6 (Berkeley) 6/27/88";
#endif /* LIBC_SCCS and not lint */

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

#define	MAXALIASES	35

static char SERVDB[] = "/etc/services";
static FILE *servf = NULL;
static char line[BUFSIZ+1];
static struct servent serv;
static char *serv_aliases[MAXALIASES];
static char *any();
int _serv_stayopen;

setservent(f)
	int f;
{
	if (servf == NULL)
		servf = fopen(SERVDB, "r" );
	else
		rewind(servf);
	_serv_stayopen |= f;
}

endservent()
{
	if (servf) {
		fclose(servf);
		servf = NULL;
	}
	_serv_stayopen = 0;
}

struct servent *
getservent()
{
	char *p;
	register char *cp, **q;

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

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
8ea4199d DF	1	/*
8ea4199d DF	2	* Copyright (c) 1983 Regents of the University of California.
6b2f9dd0 KB	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
f4f66d2c KB	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.
8ea4199d DF	16	*/
8ea4199d DF	17
2ce81398	18	#if defined(LIBC_SCCS) && !defined(lint)
ca67e7b4	19	static char sccsid[] = "@(#)getservent.c 5.6 (Berkeley) 6/27/88";
6b2f9dd0	20	#endif /* LIBC_SCCS and not lint */
229225cd SL	21
229225cd SL	22	#include <stdio.h>
4533a593	23	#include <sys/param.h>
62fc8b9c	24	#include <sys/types.h>
229225cd SL	25	#include <sys/socket.h>
	26	#include <netdb.h>
	27	#include <ctype.h>
	28
	29	#define MAXALIASES 35
	30
62fc8b9c	31	static char SERVDB[] = "/etc/services";
229225cd SL	32	static FILE *servf = NULL;
	33	static char line[BUFSIZ+1];
	34	static struct servent serv;
	35	static char *serv_aliases[MAXALIASES];
229225cd	36	static char *any();
5442f2c7	37	int _serv_stayopen;
229225cd SL	38
	39	setservent(f)
	40	int f;
	41	{
	42	if (servf == NULL)
	43	servf = fopen(SERVDB, "r" );
	44	else
	45	rewind(servf);
5442f2c7	46	_serv_stayopen \|= f;
229225cd SL	47	}
	48
	49	endservent()
	50	{
5442f2c7	51	if (servf) {
229225cd SL	52	fclose(servf);
	53	servf = NULL;
	54	}
5442f2c7	55	_serv_stayopen = 0;
229225cd SL	56	}
	57
	58	struct servent *
	59	getservent()
	60	{
	61	char *p;
	62	register char cp, *q;
	63
	64	if (servf == NULL && (servf = fopen(SERVDB, "r" )) == NULL)
	65	return (NULL);
	66	again:
	67	if ((p = fgets(line, BUFSIZ, servf)) == 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	serv.s_name = p;
	76	p = any(p, " \t");
	77	if (p == NULL)
	78	goto again;
	79	*p++ = '\0';
	80	while (p == ' ' \|\| p == '\t')
	81	p++;
	82	cp = any(p, ",/");
	83	if (cp == NULL)
	84	goto again;
	85	*cp++ = '\0';
62fc8b9c	86	serv.s_port = htons((u_short)atoi(p));
229225cd	87	serv.s_proto = cp;
9243aabf	88	q = serv.s_aliases = serv_aliases;
229225cd	89	cp = any(cp, " \t");
463dee20	90	if (cp != NULL)
229225cd	91	*cp++ = '\0';
463dee20 SL	92	while (cp && *cp) {
	93	if (cp == ' ' \|\| cp == '\t') {
	94	cp++;
	95	continue;
229225cd	96	}
463dee20 SL	97	if (q < &serv_aliases[MAXALIASES - 1])
	98	*q++ = cp;
	99	cp = any(cp, " \t");
	100	if (cp != NULL)
	101	*cp++ = '\0';
229225cd SL	102	}
	103	*q = NULL;
	104	return (&serv);
	105	}
	106
	107	static char *
	108	any(cp, match)
	109	register char *cp;
	110	char *match;
	111	{
	112	register char *mp, c;
	113
	114	while (c = *cp) {
	115	for (mp = match; *mp; mp++)
	116	if (*mp == c)
	117	return (cp);
	118	cp++;
	119	}
	120	return ((char *)0);
	121	}