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 * %sccs.include.redist.c%
10 *
11 * @(#)pt_file.c 8.3 (Berkeley) 07/03/94
12 *
13 * $Id: pt_file.c,v 1.1 1992/05/25 21:43:09 jsp Exp jsp $
14 */
15
16 #include <stdio.h>
17 #include <unistd.h>
18 #include <stdlib.h>
19 #include <string.h>
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <sys/types.h>
23 #include <sys/param.h>
24 #include <sys/syslog.h>
25
26 #include "portald.h"
27
portal_file(pcr,key,v,so,fdp)28 int portal_file(pcr, key, v, so, fdp)
29 struct portal_cred *pcr;
30 char *key;
31 char **v;
32 int so;
33 int *fdp;
34 {
35 int fd;
36 char pbuf[MAXPATHLEN];
37 int error;
38 gid_t gidset[NGROUPS];
39 int i;
40
41 pbuf[0] = '/';
42 strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0));
43
44 #ifdef DEBUG
45 printf("path = %s, uid = %d, gid = %d\n", pbuf, pcr->pcr_uid, pcr->pcr_groups[0]);
46 #endif
47
48 for (i = 0; i < pcr->pcr_ngroups; i++)
49 gidset[i] = pcr->pcr_groups[i];
50
51 if (setgroups(pcr->pcr_ngroups, gidset) < 0)
52 return (errno);
53
54 if (seteuid(pcr->pcr_uid) < 0)
55 return (errno);
56
57 fd = open(pbuf, O_RDWR|O_CREAT, 0666);
58 if (fd < 0)
59 error = errno;
60 else
61 error = 0;
62
63 if (seteuid((uid_t) 0) < 0) { /* XXX - should reset gidset too */
64 error = errno;
65 syslog(LOG_ERR, "setcred: %s", strerror(error));
66 if (fd >= 0) {
67 (void) close(fd);
68 fd = -1;
69 }
70 }
71
72 if (error == 0)
73 *fdp = fd;
74
75 #ifdef DEBUG
76 fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n", *fdp, error);
77 #endif
78
79 return (error);
80 }
81