MOUNT(2-SysV)       RISC/os Reference Manual        MOUNT(2-SysV)



NAME
     mount - mount a file system

SYNOPSIS
     #include <sys/mount.h>

     int mount (spec, dir, mflag, fstyp)
     char *spec, *dir;
     int mflag, fstyp;

DESCRIPTION
     mount requests that a removable file system contained on the
     block special file identified by spec be mounted on the
     directory identified by dir.  spec and dir are pointers to
     path names.  fstyp is the file system type number.  The
     sysfs(2) system call can be used to determine the file sys-
     tem type number.  Note that if the MS_FSS flag bit of mflag
     is off, the file system type will default to the root file
     system type. Only if the bit is on will fstyp be used to
     indicate the file system type.

     Upon successful completion, references to the file dir will
     refer to the root directory on the mounted file system.

     The low-order bit of mflag is used to control write permis-
     sion on the mounted file system; if 1, writing is forbidden,
     otherwise writing is permitted according to individual file
     accessibility.

     mount may be invoked only by the super-user.  It is intended
     for use only by the mount(1M) utility.

ERRORS
     mount will fail if one or more of the following are true:

     [EPERM]                  The effective user ID is not
                              super-user.

     [ENOENT]                 Any of the named files does not
                              exist.

     [ENOTDIR]                A component of a path prefix is not
                              a directory.

     [EREMOTE]                spec is remote and cannot be
                              mounted.

     [ENOLINK]                path points to a remote machine and
                              the link to that machine is no
                              longer active.

     [EMULTIHOP]              Components of path require hopping



                         Printed 1/15/91                   Page 1

MOUNT(2-SysV)       RISC/os Reference Manual        MOUNT(2-SysV)



                              to multiple remote machines.

     [ENOTBLK]                Spec is not a block special device.

     [ENXIO]                  The device associated with spec
                              does not exist.

     [ENOTDIR]                dir is not a directory.

     [EFAULT]                 spec or dir points outside the
                              allocated address space of the pro-
                              cess.

     [EBUSY]                  dir is currently mounted on, is
                              someone's current working direc-
                              tory, or is otherwise busy.

     [EBUSY]                  The device associated with spec is
                              currently mounted.

     [EBUSY]                  There are no more mount table
                              entries.

     [EROFS]                  spec is write protected and mflag
                              requests write permission.

     [ENOSPC]                 The file system state in the
                              super-block is not FsOKAY and mflag
                              requests write permission.

     [EINVAL]                 The super block has an invalid
                              magic number or the fstyp is
                              invalid or mflag is not valid.

SEE ALSO
     sysfs(2), umount(2), fs(4FFS).
     mount(1M) in the System Administrator's Reference Manual.

DIAGNOSTICS
     Upon successful completion a value of 0 is returned.  Other-
     wise, a value of -1 is returned and errno is set to indicate
     the error.













 Page 2                  Printed 1/15/91