MKFIFO(2) MidnightBSD System Calls Manual MKFIFO(2)

NAME

mkfifo — make a fifo file

LIBRARY

Standard C Library (libc, −lc)

SYNOPSIS

#include <sys/types.h>
#include <sys/stat.h>

int

mkfifo(const char *path, mode_t mode);

DESCRIPTION

The mkfifo() system call creates a new fifo file with name path. The access permissions are specified by mode and restricted by the umask(2) of the calling process.

The fifo’s owner ID is set to the process’s effective user ID. The fifo’s group ID is set to that of the parent directory in which it is created.

RETURN VALUES

The mkfifo() function returns the value 0 if successful; otherwise the value −1 is returned and the global variable errno is set to indicate the error.

ERRORS

The mkfifo() system call will fail and no fifo will be created if:

[ENOTSUP]

The kernel has not been configured to support fifo’s.

[ENOTDIR]

A component of the path prefix is not a directory.

[ENAMETOOLONG]

A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters.

[ENOENT]

A component of the path prefix does not exist.

[EACCES]

A component of the path prefix denies search permission, or write permission is denied on the parent directory of the fifo to be created.

[ELOOP]

Too many symbolic links were encountered in translating the pathname.

[EROFS]

The named file would reside on a read-only file system.

[EEXIST]

The named file exists.

[EPERM]

The parent directory of the named file has its immutable flag set, see the chflags(2) manual page for more information.

[ENOSPC]

The directory in which the entry for the new fifo is being placed cannot be extended because there is no space left on the file system containing the directory.

[ENOSPC]

There are no free inodes on the file system on which the fifo is being created.

[EDQUOT]

The directory in which the entry for the new fifo is being placed cannot be extended because the user’s quota of disk blocks on the file system containing the directory has been exhausted.

[EDQUOT]

The user’s quota of inodes on the file system on which the fifo is being created has been exhausted.

[EIO]

An I/O error occurred while making the directory entry or allocating the inode.

[EIO]

An I/O error occurred while reading from or writing to the file system.

[EFAULT]

The path argument points outside the process’s allocated address space.

SEE ALSO

chflags(2), chmod(2), mknod(2), stat(2), umask(2)

STANDARDS

The mkfifo() system call is expected to conform to ISO/IEC 9945-1:1990 (‘‘POSIX.1’’).

MidnightBSD 0.3 December 10, 2006 MidnightBSD 0.3