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1 | .\" $NetBSD: mkfifo.2,v 1.8 1995/02/27 12:34:27 cgd Exp $ | |
2 | .\" | |
3 | .\" Copyright (c) 1990, 1991, 1993 | |
4 | .\" The Regents of the University of California. All rights reserved. | |
5 | .\" | |
6 | .\" Redistribution and use in source and binary forms, with or without | |
7 | .\" modification, are permitted provided that the following conditions | |
8 | .\" are met: | |
9 | .\" 1. Redistributions of source code must retain the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer. | |
11 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
12 | .\" notice, this list of conditions and the following disclaimer in the | |
13 | .\" documentation and/or other materials provided with the distribution. | |
14 | .\" 3. All advertising materials mentioning features or use of this software | |
15 | .\" must display the following acknowledgement: | |
16 | .\" This product includes software developed by the University of | |
17 | .\" California, Berkeley and its contributors. | |
18 | .\" 4. Neither the name of the University nor the names of its contributors | |
19 | .\" may be used to endorse or promote products derived from this software | |
20 | .\" without specific prior written permission. | |
21 | .\" | |
22 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
23 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
26 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
27 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
28 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
29 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
30 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
31 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
32 | .\" SUCH DAMAGE. | |
33 | .\" | |
34 | .\" @(#)mkfifo.2 8.1 (Berkeley) 6/4/93 | |
35 | .\" | |
36 | .Dd June 4, 1993 | |
37 | .Dt MKFIFO 2 | |
38 | .Os | |
39 | .Sh NAME | |
40 | .Nm mkfifo | |
41 | .Nd make a fifo file | |
42 | .Sh SYNOPSIS | |
43 | .Fd #include <sys/types.h> | |
44 | .Fd #include <sys/stat.h> | |
45 | .Ft int | |
46 | .Fn mkfifo "const char *path" "mode_t mode" | |
47 | .Sh DESCRIPTION | |
48 | .Fn mkfifo | |
49 | creates a new fifo file with name | |
50 | .Fa path . | |
51 | The access permissions are | |
52 | specified by | |
53 | .Fa mode | |
54 | and restricted by the | |
55 | .Xr umask 2 | |
56 | of the calling process. | |
57 | .Pp | |
58 | The fifo's owner ID is set to the process's effective user ID. | |
59 | The fifo's group ID is set to that of the parent directory in | |
60 | which it is created. | |
61 | .Sh RETURN VALUES | |
62 | A 0 return value indicates success. A -1 return value | |
63 | indicates an error, and an error code is stored in | |
64 | .Va errno . | |
65 | .Sh ERRORS | |
66 | .Fn mkfifo | |
67 | will fail and no fifo will be created if: | |
68 | .Bl -tag -width Er | |
69 | .It Bq Er ENOTSUP | |
70 | The kernel has not been configured to support fifo's. | |
71 | .It Bq Er ENOTDIR | |
72 | A component of the path prefix is not a directory. | |
73 | .It Bq Er ENAMETOOLONG | |
74 | A component of a pathname exceeded | |
75 | .Dv {NAME_MAX} | |
76 | characters, or an entire path name exceeded | |
77 | .Dv {PATH_MAX} | |
78 | characters. | |
79 | .It Bq Er ENOENT | |
80 | A component of the path prefix does not exist. | |
81 | .It Bq Er EACCES | |
82 | Search permission is denied for a component of the path prefix. | |
83 | .It Bq Er ELOOP | |
84 | Too many symbolic links were encountered in translating the pathname. | |
85 | .It Bq Er EROFS | |
86 | The named file resides on a read-only file system. | |
87 | .It Bq Er EEXIST | |
88 | The named file exists. | |
89 | .It Bq Er ENOSPC | |
90 | The directory in which the entry for the new fifo is being placed | |
91 | cannot be extended because there is no space left on the file | |
92 | system containing the directory. | |
93 | .It Bq Er ENOSPC | |
94 | There are no free inodes on the file system on which the | |
95 | fifo is being created. | |
96 | .It Bq Er EDQUOT | |
97 | The directory in which the entry for the new fifo | |
98 | is being placed cannot be extended because the | |
99 | user's quota of disk blocks on the file system | |
100 | containing the directory has been exhausted. | |
101 | .It Bq Er EDQUOT | |
102 | The user's quota of inodes on the file system on | |
103 | which the fifo is being created has been exhausted. | |
104 | .It Bq Er EIO | |
105 | An | |
106 | .Tn I/O | |
107 | error occurred while making the directory entry or allocating the inode. | |
108 | .It Bq Er EIO | |
109 | An | |
110 | .Tn I/O | |
111 | error occurred while reading from or writing to the file system. | |
112 | .It Bq Er EFAULT | |
113 | .Fa Path | |
114 | points outside the process's allocated address space. | |
115 | .It Bq Eq EILSEQ | |
116 | The filename does not match the encoding rules. | |
117 | .El | |
118 | .Sh SEE ALSO | |
119 | .Xr chmod 2 , | |
120 | .Xr stat 2 , | |
121 | .Xr umask 2 | |
122 | .Sh STANDARDS | |
123 | The | |
124 | .Nm mkfifo | |
125 | function call conforms to | |
126 | .St -p1003.1-88 . |