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28 .\" @(#)mkfifo.2 8.1 (Berkeley) 6/4/93
44 .Fn mkfifo "const char *path" "mode_t mode"
46 .Fn mkfifoat "int fd" "const char *path" "mode_t mode"
51 creates a new fifo file with name
53 The access permissions are
58 of the calling process.
60 The fifo's owner ID is set to the process's effective user ID.
61 The fifo's group ID is set to that of the parent directory in
66 system call is equivalent to
68 except in the case where
70 specifies a relative path.
71 In this case the newly created FIFO is created relative to the
72 directory associated with the file descriptor
74 instead of the current working directory.
77 is passed the special value
81 parameter, the current working directory is used and the behavior is
82 identical to a call to
90 will fail and no fifo will be created if:
93 The kernel has not been configured to support fifo's.
95 A component of the path prefix is not a directory.
96 .It Bq Er ENAMETOOLONG
97 A component of a pathname exceeded 255 characters,
98 or an entire path name exceeded 1023 characters.
100 A component of the path prefix does not exist.
102 A component of the path prefix denies search permission, or write permission
103 is denied on the parent directory of the fifo to be created.
105 Too many symbolic links were encountered in translating the pathname.
107 The named file would reside on a read-only file system.
109 The named file exists.
111 The parent directory of the named file has its immutable flag set, see the
113 manual page for more information.
115 The directory in which the entry for the new fifo is being placed
116 cannot be extended because there is no space left on the file
117 system containing the directory.
119 There are no free inodes on the file system on which the
120 fifo is being created.
122 The directory in which the entry for the new fifo
123 is being placed cannot be extended because the
124 user's quota of disk blocks on the file system
125 containing the directory has been exhausted.
127 The user's quota of inodes on the file system on
128 which the fifo is being created has been exhausted.
132 error occurred while making the directory entry or allocating the inode.
136 error occurred while reading from or writing to the file system.
141 points outside the process's allocated address space.
144 In addition to the errors returned by the
153 argument does not specify an absolute path and the
157 nor a valid file descriptor open for searching.
161 argument is not an absolute path and
165 nor a file descriptor associated with a directory.
176 system call is expected to conform to
180 system call follows The Open Group Extended API Set 2 specification.
184 system call appeared in