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--- old/usr/src/man/man1m/mount_tmpfs.1m
+++ new/usr/src/man/man1m/mount_tmpfs.1m
1 1 '\" te
2 2 .\" Copyright (c) 2003, Sun Microsystems, Inc. All Rights Reserved
3 3 .\" Copyright 2015 Joyent, Inc.
4 4 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
5 5 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
6 6 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
7 7 .TH MOUNT_TMPFS 1M "Mar 18, 2015"
8 8 .SH NAME
9 9 mount_tmpfs \- mount tmpfs file systems
10 10 .SH SYNOPSIS
11 11 .LP
12 12 .nf
13 13 \fBmount\fR [\fB-F\fR tmpfs] [\fB-o\fR \fIspecific_options\fR] [\fB-O\fR] \fIspecial\fR \fImount_point\fR
14 14 .fi
15 15
16 16 .SH DESCRIPTION
17 17 .LP
18 18 \fBtmpfs\fR is a memory based file system which uses kernel resources relating
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19 19 to the \fBVM\fR system and page cache as a file system.
20 20 .sp
21 21 .LP
22 22 \fBmount\fR attaches a \fBtmpfs\fR file system to the file system hierarchy at
23 23 the pathname location \fImount_point\fR, which must already exist. If
24 24 \fImount_point\fR has any contents prior to the \fBmount\fR operation, these
25 25 remain hidden until the file system is once again unmounted. The attributes
26 26 (mode, owner, and group) of the root of the \fBtmpfs\fR filesystem are
27 27 inherited from the underlying \fImount_point\fR, provided that those attributes
28 28 are determinable. If not, the root's attributes are set to their default
29 -values. The mode may also be overriden by the \fBmode\fR mount option, which
29 +values. The mode may also be overridden by the \fBmode\fR mount option, which
30 30 takes precedence if set.
31 31 .sp
32 32 .LP
33 33 The \fIspecial\fR argument is usually specified as \fBswap\fR but is in fact
34 34 disregarded and assumed to be the virtual memory resources within the system.
35 35 .SH OPTIONS
36 36 .ne 2
37 37 .na
38 38 \fB\fB-o\fR \fIspecific_options\fR\fR
39 39 .ad
40 40 .RS 23n
41 41 Specify \fBtmpfs\fR file system specific options in a comma-separated list with
42 42 no intervening spaces. If invalid options are specified, a warning message is
43 43 printed and the invalid options are ignored. The following options are
44 44 available:
45 45 .sp
46 46 .ne 2
47 47 .na
48 48 \fB\fBremount\fR\fR
49 49 .ad
50 50 .sp .6
51 51 .RS 19n
52 52 Remounts a file system with a new size. A size not explicitly
53 53 set with \fBremount\fR reverts to no limit.
54 54 .RE
55 55
56 56 .sp
57 57 .ne 2
58 58 .na
59 59 \fBmode=\fIoctalmode\fR\fR
60 60 .ad
61 61 .RS 19n
62 62 The \fImode\fR argument controls the permissions of the \fBtmpfs\fR mount
63 63 point. The argument must be an octal number, of the form passed to
64 64 \fBchmod\fR(1). Only the access mode, setuid, setgid, and sticky bits (a mask
65 65 of \fB07777\fR) may be set. If this option is not provided then the default
66 66 mode behaviour, as described above, applies.
67 67 .RE
68 68
69 69 .sp
70 70 .sp
71 71 .ne 2
72 72 .na
73 73 \fBsize=\fIsz\fR\fR
74 74 .ad
75 75 .RS 19n
76 76 The \fIsz\fR argument controls the size of this particular \fBtmpfs\fR file
77 77 system. If the argument is has a `k' suffix, the number will be interpreted as
78 78 a number of kilobytes. An `m' suffix will be interpreted as a number of
79 79 megabytes. A `g' suffix will be interpreted as a number of gigabytes. A `%'
80 80 suffix will be interpreted as a percentage of the swap space available to the
81 81 zone. No suffix is interpreted as bytes. In all cases, the actual size of
82 82 the file system is the number of bytes specified, rounded up to the physical
83 83 pagesize of the system.
84 84 .RE
85 85
86 86 .sp
87 87 .ne 2
88 88 .na
89 89 \fB\fBxattr\fR | \fBnoxattr\fR\fR
90 90 .ad
91 91 .RS 19n
92 92 Allow or disallow the creation and manipulation of extended attributes. The
93 93 default is \fBxattr\fR. See \fBfsattr\fR(5) for a description of extended
94 94 attributes.
95 95 .RE
96 96
97 97 .RE
98 98
99 99 .sp
100 100 .ne 2
101 101 .na
102 102 \fB\fB-O\fR\fR
103 103 .ad
104 104 .RS 23n
105 105 Overlay mount. Allow the file system to be mounted over an existing mount
106 106 point, making the underlying file system inaccessible. If a mount is attempted
107 107 on a pre-existing mount point without setting this flag, the mount will fail,
108 108 producing the error: \f(CWdevice busy\fR.
109 109 .RE
110 110
111 111 .SH FILES
112 112 .ne 2
113 113 .na
114 114 \fB\fB/etc/mnttab\fR\fR
115 115 .ad
116 116 .RS 15n
117 117 Table of mounted file systems
118 118 .RE
119 119
120 120 .SH SEE ALSO
121 121 .LP
122 122 \fBmount\fR(1M), \fBmkdir\fR(2), \fBmount\fR(2), \fBopen\fR(2),
123 123 \fBumount\fR(2), \fBmnttab\fR(4), \fBattributes\fR(5), \fBfsattr\fR(5),
124 124 \fBtmpfs\fR(7FS)
125 125 .SH NOTES
126 126 .LP
127 127 If the directory on which a file system is to be mounted is a symbolic link,
128 128 the file system is mounted on the directory to which the symbolic link refers,
129 129 rather than on top of the symbolic link itself.
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