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1.1 root 1: .\" Copyright (c) 1990 The Regents of the University of California.
2: .\" All rights reserved.
3: .\"
4: .\" Redistribution and use in source and binary forms are permitted provided
5: .\" that: (1) source distributions retain this entire copyright notice and
6: .\" comment, and (2) distributions including binaries display the following
7: .\" acknowledgement: ``This product includes software developed by the
8: .\" University of California, Berkeley and its contributors'' in the
9: .\" documentation or other materials provided with the distribution and in
10: .\" all advertising materials mentioning features or use of this software.
11: .\" Neither the name of the University nor the names of its contributors may
12: .\" be used to endorse or promote products derived from this software without
13: .\" specific prior written permission.
14: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
15: .\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
16: .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
17: .\"
18: .\" @(#)mkfifo.2 6.2 (Berkeley) 6/23/90
19: .\"
20: .TH MKFIFO 2 "June 23, 1990"
21: .UC 7
22: .SH NAME
23: mkfifo \- make a fifo file
24: .SH SYNOPSIS
25: .nf
26: .ft B
27: mkfifo(path, mode)
28: char *path;
29: int mode;
30: .fi
31: .ft R
32: .SH DESCRIPTION
33: .I Mkfifo
34: creates a new fifo file with name
35: .IR path .
36: The mode of the new file
37: is initialized from
38: .IR mode .
39: (The protection part of the mode
40: is modified by the process's mode mask; see
41: .IR umask (2)).
42: .PP
43: The fifo's owner ID is set to the process's effective user ID.
44: The fifo's group ID is set to that of the parent directory in
45: which it is created.
46: .PP
47: The low-order 9 bits of mode are modified by the process's
48: file mode creation mask: all bits set in the process's file mode
49: creation mask are cleared. See
50: .IR umask (2).
51: .SH "RETURN VALUE
52: A 0 return value indicates success. A \-1 return value
53: indicates an error, and an error code is stored in
54: .I errno.
55: .SH "ERRORS
56: .I Mkfifo
57: will fail and no fifo will be created if:
58: .TP 15
59: [ENOTSUPP]
60: The kernel has not been configured to support fifo's.
61: .TP 15
62: [ENOTDIR]
63: A component of the path prefix is not a directory.
64: .TP 15
65: [EINVAL]
66: The pathname contains a character with the high-order bit set.
67: .TP 15
68: [ENAMETOOLONG]
69: A component of a pathname exceeded 255 characters,
70: or an entire path name exceeded 1023 characters.
71: .TP 15
72: [ENOENT]
73: A component of the path prefix does not exist.
74: .TP 15
75: [EACCES]
76: Search permission is denied for a component of the path prefix.
77: .TP 15
78: [ELOOP]
79: Too many symbolic links were encountered in translating the pathname.
80: .TP 15
81: [EPERM]
82: The \fIpath\fP argument contains a byte with the high-order bit set.
83: .TP 15
84: [EROFS]
85: The named file resides on a read-only file system.
86: .TP 15
87: [EEXIST]
88: The named file exists.
89: .TP 15
90: [ENOSPC]
91: The directory in which the entry for the new fifo is being placed
92: cannot be extended because there is no space left on the file
93: system containing the directory.
94: .TP 15
95: [ENOSPC]
96: There are no free inodes on the file system on which the
97: fifo is being created.
98: .TP 15
99: [EDQUOT]
100: The directory in which the entry for the new fifo
101: is being placed cannot be extended because the
102: user's quota of disk blocks on the file system
103: containing the directory has been exhausted.
104: .TP 15
105: [EDQUOT]
106: The user's quota of inodes on the file system on
107: which the fifo is being created has been exhausted.
108: .TP 15
109: [EIO]
110: An I/O error occurred while making the directory entry or allocating the inode.
111: .TP 15
112: [EIO]
113: An I/O error occurred while reading from or writing to the file system.
114: .TP 15
115: [EFAULT]
116: .I Path
117: points outside the process's allocated address space.
118: .SH "SEE ALSO"
119: chmod(2), stat(2), umask(2)
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