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    Command:

    mkfifoat

    
    
    
    

    SYNOPSIS

         #include <sys/types.h>
         #include <sys/stat.h>
    
         int
         mkfifo(const char *path, mode_t mode);
    
         int
         mkfifoat(int fd, 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.
    
         The mkfifoat() system call is equivalent to mkfifo() except in the case
         where path specifies a relative path.  In this case the newly created
         FIFO is created relative to the directory associated with the file
         descriptor fd instead of the current working directory.  If mkfifoat() is
         passed the special value AT_FDCWD in the fd parameter, the current work-
         ing directory is used and the behavior is identical to a call to
         mkfifo().
    
    
    

    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 permis-
                            sion, or write permission is denied on the parent
                            directory of the fifo to be created.
    
         [ELOOP]            Too many symbolic links were encountered in translat-
                            ing the pathname.
    
         [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 allo-
                            cated address space.
    
         In addition to the errors returned by the mkfifo(), the mkfifoat() may
         fail if:
    
         [EBADF]            The path argument does not specify an absolute path
                            and the fd argument is neither AT_FDCWD nor a valid
                            file descriptor open for searching.
    
         [ENOTDIR]          The path argument is not an absolute path and fd is
                            neither AT_FDCWD nor a file descriptor associated with
                            a directory.
    
    
    

    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").  The mkfifoat() system call follows The Open Group Extended
         API Set 2 specification.
    
    
    

    HISTORY

         The mkfifoat() system call appeared in FreeBSD 8.0.
    
    
    

    BSD April 10, 2008 BSD

    
    
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