mount man page on NeXTSTEP

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MOUNT(2)							      MOUNT(2)

NAME
       mount - mount file system

SYNOPSIS
       #include <sys/mount.h>

       mount(type, dir, flags, data)
       int type;
       char *dir;
       int flags;
       caddr_t data;

DESCRIPTION
       mount  attaches	a  file	 system	 to  a	directory.  After a successful
       return, references to directory dir will refer to the root directory on
       the  newly  mounted file system.	 dir is a pointer to a null-terminated
       string containing a path name.  dir must exist already, and must	 be  a
       directory.   Its old contents are inaccessible while the file system is
       mounted.

       mount may be invoked only by the super-user.

       The flags argument determines whether the file system  can  be  written
       on,  and	 if  set-uid execution is allowed.  Physically write-protected
       and magnetic tape file systems must be mounted read-only or errors will
       occur  when access times are updated, whether or not any explicit write
       is attempted.

       type indicates the type of the filesystem.  It must be one of the types
       defined	in  mount.h.   data is a pointer to a structure which contains
       the type	 specific  arguments  to  mount.   Below  is  a	 list  of  the
       filesystem types supported and the type specific arguments to each:

       MOUNT_UFS
	   struct ufs_args {
		   char	   *fspec;	/* Block special file to mount */
	   };

       MOUNT_NFS
	   #include	      <nfs/nfs.h>
	   #include	      <netinet/in.h>
	   struct nfs_args {
		   struct sockaddr_in  *addr;  /* file server address */
		   fhandle_t  *fh;	/* File handle to be mounted */
		   int	      flags;	/* flags */
		   int	      wsize;	/* write size in bytes */
		   int	      rsize;	/* read size in bytes */
		   int	      timeo;	/* initial timeout in .1 secs */
		   int	      retrans;	/* times to retry send */
	   };

RETURN VALUE
       mount returns 0 if the action occurred, and -1 if fspec is inaccessible
       or not an appropriate file, if name does not exist, if fspec is already
       mounted,	 if  dir  is  in  use,	or  if there are already too many file
       systems mounted.

ERRORS
       mount fails when one of the following occurs:

       EPERM	      The caller is not the super-user.

       ENOTBLK	      fspec is not a block device.

       ENXIO	      The major device number of fspec is out of  range	 (this
		      indicates	 no  device  driver  exists for the associated
		      hardware).

       EBUSY	      dir is not a directory,  or  another  process  currently
		      holds a reference to it.

       EBUSY	      No space remains in the mount table.

       EBUSY	      The  super  block	 for  the  file system had a bad magic
		      number or an out of range block size.

       EBUSY	      Not enough memory was available  to  read	 the  cylinder
		      group information for the file system.

       EIO	      An  I/O  error occurred while reading the super block or
		      cylinder group information.

       ENOTDIR	      A component of the path prefix in fspec or dir is not  a
		      directory.

       EINVAL	      The  path name of fspec or dir contains a character with
		      the high-order bit set.

       ENAMETOOLONG   The length of a component of the path name of  fspec  or
		      dir  exceeds 255 characters, or the length of the entire
		      path name of fspec or dir exceeds 1023 characters.

       ENOENT	      fspec or dir does not exist.

       ENOTDIR	      The file named by dir is not a directory.

       EACCES	      Search permission is denied for a component of the  path
		      prefix of fspec or dir.

       EFAULT	      fspec  or	 dir  points  outside  the process's allocated
		      address space.

       ELOOP	      Too many symbolic links were encountered in  translating
		      the path name of fspec or dir.

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

SEE ALSO
       unmount(2), mount(8)

BUGS
       The error codes are in a state of disarray; too many errors  appear  to
       the caller as one value.

				 16 July 1986			      MOUNT(2)
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