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Commit	Line	Data
984263bc MD	1	/*
	2	* Copyright (c) 1989, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
dc71b7ab	13	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
1de703da MD	28	*
	29	* @(#)getgrent.c 8.2 (Berkeley) 3/21/94
	30	* $FreeBSD: src/libexec/mknetid/parse_group.c,v 1.6 1999/08/28 00:09:42 peter Exp $
fc6d0222	31	* $DragonFly: src/libexec/mknetid/parse_group.c,v 1.3 2006/08/03 16:40:46 swildner Exp $
984263bc MD	32	*/
984263bc MD	33
984263bc MD	34	/*
	35	* This is a slightly modified chunk of getgrent(3). All the YP support
	36	* and unneeded functions have been stripped out.
	37	*/
	38
	39	#include <sys/types.h>
	40	#include <grp.h>
	41	#include <stdio.h>
	42	#include <stdlib.h>
	43	#include <string.h>
	44
06a0ed23 SW	45	struct group *_getgrent(void);
	46	int _setgrent(void);
	47	void _endgrent(void);
984263bc	48	FILE *_gr_fp;
06a0ed23	49
984263bc MD	50	static struct group _gr_group;
984263bc MD	51	static int _gr_stayopen;
06a0ed23	52	static int grscan(int, gid_t, char *), start_gr(void);
984263bc MD	53
	54	#define MAXGRP 200
	55	static char *members[MAXGRP];
	56	#define MAXLINELENGTH 1024
	57	static char line[MAXLINELENGTH];
	58
	59	struct group *
06a0ed23	60	_getgrent(void)
984263bc MD	61	{
	62	if (!_gr_fp && !start_gr()) {
	63	return NULL;
	64	}
	65
	66
	67	if (!grscan(0, 0, NULL))
	68	return(NULL);
	69	return(&_gr_group);
	70	}
	71
	72	static int
06a0ed23	73	start_gr(void)
984263bc MD	74	{
	75	return 1;
	76	}
	77
06a0ed23 SW	78	static int
06a0ed23 SW	79	_setgroupent(int stayopen)
984263bc MD	80	{
	81	if (!start_gr())
	82	return(0);
	83	_gr_stayopen = stayopen;
	84	return(1);
	85	}
	86
	87	int
06a0ed23	88	_setgrent(void)
984263bc MD	89	{
	90	return(_setgroupent(0));
	91	}
	92
	93	void
06a0ed23	94	_endgrent(void)
984263bc MD	95	{
	96	if (_gr_fp) {
	97	(void)fclose(_gr_fp);
	98	_gr_fp = NULL;
	99	}
	100	}
	101
	102	static int
06a0ed23	103	grscan(int search, gid_t gid, char *name)
984263bc	104	{
06a0ed23	105	char cp, *m;
984263bc MD	106	char *bp;
	107	for (;;) {
	108	if (!fgets(line, sizeof(line), _gr_fp))
	109	return(0);
	110	bp = line;
	111	/* skip lines that are too big */
	112	if (!index(line, '\n')) {
	113	int ch;
	114
	115	while ((ch = getc(_gr_fp)) != '\n' && ch != EOF)
	116	;
	117	continue;
	118	}
	119	if ((_gr_group.gr_name = strsep(&bp, ":\n")) == NULL)
	120	break;
	121	if (_gr_group.gr_name[0] == '+')
	122	continue;
	123
	124	if (search && name) {
	125	if(strcmp(_gr_group.gr_name, name)) {
	126	continue;
	127	}
	128	}
	129	if ((_gr_group.gr_passwd = strsep(&bp, ":\n")) == NULL)
fc6d0222	130	break;
984263bc MD	131	if (!(cp = strsep(&bp, ":\n")))
	132	continue;
	133	_gr_group.gr_gid = atoi(cp);
	134	if (search && name == NULL && _gr_group.gr_gid != gid)
	135	continue;
	136	cp = NULL;
	137	if (bp == NULL) /* !! Must check for this! */
	138	break;
	139	for (m = _gr_group.gr_mem = members;; bp++) {
	140	if (m == &members[MAXGRP - 1])
	141	break;
	142	if (*bp == ',') {
	143	if (cp) {
	144	*bp = '\0';
	145	*m++ = cp;
	146	cp = NULL;
	147	}
	148	} else if (bp == '\0' \|\| bp == '\n' \|\| *bp == ' ') {
	149	if (cp) {
	150	*bp = '\0';
	151	*m++ = cp;
	152	}
	153	break;
	154	} else if (cp == NULL)
	155	cp = bp;
	156	}
	157	*m = NULL;
	158	return(1);
	159	}
	160	/* NOTREACHED */
	161	return (0);
	162	}