initial import of NetBSD tree

1 files changed, 313 insertions, 0 deletions

diff --git a/lib/libc/gen/getgrent.c b/lib/libc/gen/getgrent.c
new file mode 100644
index 00000000000..b7d5692e4f3
--- /dev/null
+++ b/lib/libc/gen/getgrent.c
@@ -0,0 +1,313 @@
+/*	$NetBSD: getgrent.c,v 1.13 1995/07/28 05:43:57 phil Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * Portions Copyright (c) 1994, Jason Downs. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)getgrent.c	8.2 (Berkeley) 3/21/94";
+#else
+static char rcsid[] = "$NetBSD: getgrent.c,v 1.13 1995/07/28 05:43:57 phil Exp $";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <grp.h>
+#ifdef YP
+#include <rpc/rpc.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+#endif
+
+static FILE *_gr_fp;
+static struct group _gr_group;
+static int _gr_stayopen;
+static int grscan(), start_gr();
+
+#define	MAXGRP		200
+static char *members[MAXGRP];
+#define	MAXLINELENGTH	1024
+static char line[MAXLINELENGTH];
+
+#ifdef YP
+enum _ypmode { YPMODE_NONE, YPMODE_FULL, YPMODE_NAME };
+static enum _ypmode __ypmode;
+static char	*__ypcurrent, *__ypdomain;
+static int	__ypcurrentlen;
+#endif
+
+struct group *
+getgrent()
+{
+	if (!_gr_fp && !start_gr() || !grscan(0, 0, NULL))
+		return(NULL);
+	return(&_gr_group);
+}
+
+struct group *
+getgrnam(name)
+	const char *name;
+{
+	int rval;
+
+	if (!start_gr())
+		return(NULL);
+	rval = grscan(1, 0, name);
+	if (!_gr_stayopen)
+		endgrent();
+	return(rval ? &_gr_group : NULL);
+}
+
+struct group *
+#ifdef __STDC__
+getgrgid(gid_t gid)
+#else
+getgrgid(gid)
+	gid_t gid;
+#endif
+{
+	int rval;
+
+	if (!start_gr())
+		return(NULL);
+	rval = grscan(1, gid, NULL);
+	if (!_gr_stayopen)
+		endgrent();
+	return(rval ? &_gr_group : NULL);
+}
+
+static int
+start_gr()
+{
+	if (_gr_fp) {
+		rewind(_gr_fp);
+#ifdef YP
+		__ypmode = YPMODE_NONE;
+		if(__ypcurrent)
+			free(__ypcurrent);
+		__ypcurrent = NULL;
+#endif
+		return(1);
+	}
+	return((_gr_fp = fopen(_PATH_GROUP, "r")) ? 1 : 0);
+}
+
+void
+setgrent()
+{
+	(void) setgroupent(0);
+}
+
+int
+setgroupent(stayopen)
+	int stayopen;
+{
+	if (!start_gr())
+		return(0);
+	_gr_stayopen = stayopen;
+	return(1);
+}
+
+void
+endgrent()
+{
+	if (_gr_fp) {
+		(void)fclose(_gr_fp);
+		_gr_fp = NULL;
+#ifdef YP
+		__ypmode = YPMODE_NONE;
+		if(__ypcurrent)
+			free(__ypcurrent);
+		__ypcurrent = NULL;
+#endif
+	}
+}
+
+static int
+grscan(search, gid, name)
+	register int search, gid;
+	register char *name;
+{
+	register char *cp, **m;
+	char *bp;
+#ifdef YP
+	char *grname = (char *)NULL;
+#endif
+
+	for (;;) {
+#ifdef YP
+		if(__ypmode != YPMODE_NONE) {
+			char *key, *data;
+			int keylen, datalen;
+			int r;
+
+			if(!__ypdomain) {
+				if(yp_get_default_domain(&__ypdomain)) {
+					__ypmode = YPMODE_NONE;
+					if(grname != (char *)NULL) {
+						free(grname);
+						grname = (char *)NULL;
+					}
+					continue;
+				}
+			}
+			switch(__ypmode) {
+			case YPMODE_FULL:
+				if(__ypcurrent) {
+					r = yp_next(__ypdomain, "group.byname",
+						__ypcurrent, __ypcurrentlen,
+						&key, &keylen, &data, &datalen);
+					free(__ypcurrent);
+					if(r != 0) {
+						__ypcurrent = NULL;
+						__ypmode = YPMODE_NONE;
+						free(data);
+						continue;
+					}
+					__ypcurrent = key;
+					__ypcurrentlen = keylen;
+					bcopy(data, line, datalen);
+					free(data);
+				} else {
+					r = yp_first(__ypdomain, "group.byname",
+						&__ypcurrent, &__ypcurrentlen,
+						&data, &datalen);
+					if(r != 0) {
+						__ypmode = YPMODE_NONE;
+						free(data);
+						continue;
+					}
+					bcopy(data, line, datalen);
+					free(data);
+				}
+				break;
+			case YPMODE_NAME:
+				if(grname != (char *)NULL) {
+					r = yp_match(__ypdomain, "group.byname",
+						grname, strlen(grname),
+						&data, &datalen);
+					__ypmode = YPMODE_NONE;
+					free(grname);
+					grname = (char *)NULL;
+					if(r != 0) {
+						free(data);
+						continue;
+					}
+					bcopy(data, line, datalen);
+					free(data);
+				} else {
+					__ypmode = YPMODE_NONE;	/* ??? */
+					continue;
+				}
+				break;
+			}
+			line[datalen] = '\0';
+			bp = line;
+			goto parse;
+		}
+#endif
+		if (!fgets(line, sizeof(line), _gr_fp))
+			return(0);
+		bp = line;
+		/* skip lines that are too big */
+		if (!strchr(line, '\n')) {
+			int ch;
+
+			while ((ch = getc(_gr_fp)) != '\n' && ch != EOF)
+				;
+			continue;
+		}
+#ifdef YP
+		if (line[0] == '+') {
+			switch(line[1]) {
+			case ':':
+			case '\0':
+			case '\n':
+				if(_yp_check(NULL)) {
+					__ypmode = YPMODE_FULL;
+					continue;
+				}
+				break;
+			default:
+				if(_yp_check(NULL)) {
+					register char *tptr;
+
+					__ypmode = YPMODE_NAME;
+					tptr = strsep(&bp, ":\n");
+					grname = strdup(tptr + 1);
+					continue;
+				}
+				break;
+			}
+		}
+parse:
+#endif
+		_gr_group.gr_name = strsep(&bp, ":\n");
+		if (search && name && strcmp(_gr_group.gr_name, name))
+			continue;
+		_gr_group.gr_passwd = strsep(&bp, ":\n");
+		if (!(cp = strsep(&bp, ":\n")))
+			continue;
+		_gr_group.gr_gid = atoi(cp);
+		if (search && name == NULL && _gr_group.gr_gid != gid)
+			continue;
+		cp = NULL;
+		if (bp == NULL)
+			continue;
+		for (m = _gr_group.gr_mem = members;; bp++) {
+			if (m == &members[MAXGRP - 1])
+				break;
+			if (*bp == ',') {
+				if (cp) {
+					*bp = '\0';
+					*m++ = cp;
+					cp = NULL;
+				}
+			} else if (*bp == '\0' || *bp == '\n' || *bp == ' ') {
+				if (cp) {
+					*bp = '\0';
+					*m++ = cp;
+				}
+				break;
+			} else if (cp == NULL)
+				cp = bp;
+		}
+		*m = NULL;
+		return(1);
+	}
+	/* NOTREACHED */
+}