mount_portal(8): Raise WARNS to 6.
[dragonfly.git] / sbin / mount_portal / pt_file.c
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1/*
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 * All rights reserved.
5 *
6 * This code is derived from software donated to Berkeley by
7 * Jan-Simon Pendry.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * @(#)pt_file.c 8.3 (Berkeley) 7/3/94
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38 *
39 * $FreeBSD: src/sbin/mount_portal/pt_file.c,v 1.8 1999/08/28 00:13:38 peter Exp $
e929265d 40 * $DragonFly: src/sbin/mount_portal/pt_file.c,v 1.5 2005/11/06 12:36:40 swildner Exp $
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41 */
42
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43#include <errno.h>
44#include <fcntl.h>
45#include <string.h>
46#include <unistd.h>
47#include <sys/types.h>
48#include <sys/param.h>
49#include <sys/syslog.h>
50
51#include "portald.h"
52
e929265d 53int
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54portal_file(struct portal_cred *pcr, char *key, char **v, int so __unused,
55 int *fdp)
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56{
57 int fd;
58 char pbuf[MAXPATHLEN];
59 int error;
60 gid_t gidset[NGROUPS];
61 int i;
62
63 pbuf[0] = '/';
64 strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0));
65
66#ifdef DEBUG
67 printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]);
68 printf ("fflag = %x, oflag = %x\n", pcr->pcr_flag, (pcr->pcr_flag)-1);
69#endif
70
71 for (i = 0; i < pcr->pcr_ngroups; i++)
72 gidset[i] = pcr->pcr_groups[i];
73
74 if (setgroups(pcr->pcr_ngroups, gidset) < 0)
75 return (errno);
76
77 if (seteuid(pcr->pcr_uid) < 0)
78 return (errno);
79
80 /* dmb convert kernel flags to oflags, see <fcntl.h> */
81 fd = open(pbuf, (pcr->pcr_flag)-1, 0777);
82 if (fd < 0)
83 error = errno;
84 else
85 error = 0;
86
87 if (seteuid((uid_t) 0) < 0) { /* XXX - should reset gidset too */
88 error = errno;
89 syslog(LOG_ERR, "setcred: %s", strerror(error));
90 if (fd >= 0) {
7cee7052 91 close(fd);
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92 fd = -1;
93 }
94 }
95
96 if (error == 0)
97 *fdp = fd;
98
99#ifdef DEBUG
100 fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error);
101#endif
102
103 return (error);
104}