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 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)pt_file.c 8.3 (Berkeley) 7/3/94
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: stable/9/usr.sbin/mount_portalfs/pt_file.c 166157 2007-01-20 21:35:11Z rodrigc $");
38
39 #include <errno.h>
40 #include <fcntl.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <sys/types.h>
44 #include <sys/param.h>
45 #include <sys/syslog.h>
46
47 #include "portald.h"
48
portal_file(struct portal_cred * pcr,char * key,char ** v,int so __unused,int * fdp)49 int portal_file(struct portal_cred *pcr,
50 char *key, char **v, int so __unused, int *fdp)
51 {
52 int fd;
53 char pbuf[MAXPATHLEN];
54 int error;
55 struct portal_cred save_area;
56
57 pbuf[0] = '/';
58 strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0));
59
60 #ifdef DEBUG
61 printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]);
62 printf ("fflag = %x, oflag = %x\n", pcr->pcr_flag, (pcr->pcr_flag)-1);
63 #endif
64
65 if (set_user_credentials(pcr, &save_area) < 0)
66 return (errno);
67
68 /* dmb convert kernel flags to oflags, see <fcntl.h> */
69 fd = open(pbuf, (pcr->pcr_flag)-1, 0777);
70 if (fd < 0)
71 error = errno;
72 else
73 error = 0;
74
75 if (restore_credentials(&save_area) < 0) {
76 error = errno;
77 if (fd >= 0) {
78 (void) close(fd);
79 fd = -1;
80 }
81 }
82
83 if (error == 0)
84 *fdp = fd;
85
86 #ifdef DEBUG
87 fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error);
88 #endif
89
90 return (error);
91 }
92