1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28
29 /*
30 * Portions of this source code were derived from Berkeley 4.3 BSD
31 * under license from the Regents of the University of California.
32 */
33
34 #include <sys/param.h>
35 #include <sys/isa_defs.h>
36 #include <sys/types.h>
37 #include <sys/sysmacros.h>
38 #include <sys/user.h>
39 #include <sys/systm.h>
40 #include <sys/errno.h>
41 #include <sys/stat.h>
42 #include <sys/vnode.h>
43 #include <sys/file.h>
44 #include <sys/fcntl.h>
45 #include <sys/mode.h>
46 #include <sys/uio.h>
47 #include <sys/mkdev.h>
48 #include <sys/policy.h>
49 #include <sys/debug.h>
50 #include <c2/audit.h>
51
52 /*
53 * Create a special file, a regular file, or a FIFO.
54 * fname - pathname passed by user
55 * fmode - mode of pathname
56 * dev = device number - b/c specials only
57 */
58 int
mknodat(int fd,char * fname,mode_t fmode,dev_t dev)59 mknodat(int fd, char *fname, mode_t fmode, dev_t dev)
60 {
61 vnode_t *startvp;
62 vnode_t *vp;
63 struct vattr vattr;
64 int error;
65 enum create why;
66
67 /*
68 * Zero type is equivalent to a regular file.
69 */
70 if ((fmode & S_IFMT) == 0)
71 fmode |= S_IFREG;
72
73 /*
74 * Must be privileged unless making a FIFO node.
75 */
76 if (((fmode & S_IFMT) != S_IFIFO) && secpolicy_sys_devices(CRED()) != 0)
77 return (set_errno(EPERM));
78 /*
79 * Set up desired attributes and vn_create the file.
80 */
81 vattr.va_type = IFTOVT(fmode);
82 vattr.va_mode = fmode & MODEMASK;
83 vattr.va_mask = AT_TYPE|AT_MODE;
84 if (vattr.va_type == VCHR || vattr.va_type == VBLK) {
85 if (get_udatamodel() != DATAMODEL_NATIVE)
86 dev = expldev(dev);
87 if (dev == NODEV || (getemajor(dev)) == (major_t)NODEV)
88 return (set_errno(EINVAL));
89 vattr.va_rdev = dev;
90 vattr.va_mask |= AT_RDEV;
91 }
92
93 if (fname == NULL)
94 return (set_errno(EFAULT));
95 if ((error = fgetstartvp(fd, fname, &startvp)) != 0)
96 return (set_errno(error));
97 if (AU_AUDITING() && startvp != NULL)
98 audit_setfsat_path(1);
99
100 why = ((fmode & S_IFMT) == S_IFDIR) ? CRMKDIR : CRMKNOD;
101 error = vn_createat(fname, UIO_USERSPACE, &vattr, EXCL, 0, &vp,
102 why, 0, PTOU(curproc)->u_cmask, startvp);
103 if (startvp != NULL)
104 VN_RELE(startvp);
105 if (error)
106 return (set_errno(error));
107 VN_RELE(vp);
108 return (0);
109 }
110
111 int
mknod(char * fname,mode_t fmode,dev_t dev)112 mknod(char *fname, mode_t fmode, dev_t dev)
113 {
114 return (mknodat(AT_FDCWD, fname, fmode, dev));
115 }
116