1 files changed, 106 insertions, 0 deletions
diff --git a/sbin/mount_portal/pt_file.c b/sbin/mount_portal/pt_file.c
new file mode 100644
index 0000000..ace35c0
--- /dev/null
+++ b/sbin/mount_portal/pt_file.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * All rights reserved.
+ *
+ * This code is derived from software donated to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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.
+ *
+ *	@(#)pt_file.c	8.2 (Berkeley) 3/27/94
+ *
+ * $Id: pt_file.c,v 1.1 1992/05/25 21:43:09 jsp Exp jsp $
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/syslog.h>
+
+#include "portald.h"
+
+int portal_file(pcr, key, v, so, fdp)
+struct portal_cred *pcr;
+char *key;
+char **v;
+int so;
+int *fdp;
+{
+	int fd;
+	char pbuf[MAXPATHLEN];
+	int error;
+	int gidset[NGROUPS];
+	int i;
+
+	pbuf[0] = '/';
+	strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0));
+
+#ifdef DEBUG
+	printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]);
+#endif
+
+	for (i = 0; i < pcr->pcr_ngroups; i++)
+		gidset[i] = pcr->pcr_groups[i];
+
+	if (setgroups(pcr->pcr_ngroups, gidset) < 0)
+		return (errno);
+
+	if (seteuid(pcr->pcr_uid) < 0)
+		return (errno);
+
+	fd = open(pbuf, O_RDWR|O_CREAT, 0666);
+	if (fd < 0)
+		error = errno;
+	else
+		error = 0;
+
+	if (seteuid((uid_t) 0) < 0) {	/* XXX - should reset gidset too */
+		error = errno;
+		syslog(LOG_ERR, "setcred: %s", strerror(error));
+		if (fd >= 0) {
+			(void) close(fd);
+			fd = -1;
+		}
+	}
+
+	if (error == 0)
+		*fdp = fd;
+
+#ifdef DEBUG
+	fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error);
+#endif
+
+	return (error);
+}