mount man page on Ultrix

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mount(2nfs)							   mount(2nfs)

Name
       mount, umount - mount or remove an NFS file system

Syntax
       #include <sys/types.h>
       #include <sys/fs_types.h>

       mount(special, name, rwflag, type, options)
       char *special, *name;
       int rwflag, type;
       char *options;

       umount(dev)
       dev_t dev;

Description
       The  system  call announces to the system that a remote NFS file system
       has been mounted on directory name.  References to file name  refer  to
       the root file on the newly mounted file system.

       The  special argument is a pointer to a null-terminated string contain‐
       ing the pathname of the file system being mounted. It is of the form:
       host:pathname
       The name argument is a pointer to a null-terminated  string  containing
       the  pathname  of  the root file on the newly mounted file system.  The
       name must already exist and must be a directory.	 Its old contents  are
       inaccessible while the file system is mounted.

       The rwflag argument is used to determine whether the file system can be
       written to; if it is 0, the file system is writable,  if	 nonzero,  the
       file system is write-protected.

       The  type  argument  identifies	the  file  system  type	 that is being
       mounted.	 The DEFINE statement for the nfs type is:
       #define GT_NFS	0x04
       The nfs file system type is defined in the <fs_types.h> file.

       The options argument specifies certain parameters that can be  used  to
       define how the file system is to be mounted.  The description lists the
       available NFS options.

       The following structure is used by the user-level routine as the	 fifth
       argument when making a system call.
       struct nfs_gfs_mount {
	      struct sockaddr_in addr;	 /* File server address /*
	      fhandle_t	 fh;		 /* File handle to be mounted /*
	      int   flags;		 /* Flags handler /*
	      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 /*
	      char *hostname;		 /* Server's host name /*
	      char *optstr;		 /* Options string /*
	      int   gfs_flags;		 /* GFS flags /*
	      int   pg_thresh;		 /* Page threshold for exec /*
	   };

Return Values
       The  system  call  returns a value of 0 upon successful completion of a
       operation, -1 if the operation fails.

       The system call announces to the system that  the  remote  file	system
       mounted	on  directory name is no longer available.  The directory name
       reverts to its ordinary interpretation.

       The system call returns 0 if the dismount operation succeeds, -1 if  it
       fails.

Diagnostics
       The call fails under the following conditions:

       [EPERM]	      The  caller is not the superuser and is not the owner of
		      the mount point.

       [ENODEV]	      A component of special does not exist.

       [EINVAL]	      The pathname contains a character	 with  the  high-order
		      bit set.

       [ENOTDIR]      A component of name is not a directory.

       [EBUSY]	      Another process currently holds a reference to name.

       [ENAMETOOLONG] A	 component of the pathname exceeded 255 characters, or
		      the entire length of the pathname exceeded 1023  charac‐
		      ters.

       [ELOOP]	      Too  many symbolic links were encountered in translating
		      the pathname.

       [ENOENT]	      A component of name does not exist.

       [EMFILE]	      No space remains in the mount table.

       [EFAULT]	      The special or name points outside the  process's	 allo‐
		      cated address space space.

       [ESTALE]	      The fhandle given in the argument was invalid.  The file
		      referred to by that file handle no longer exists or  has
		      been revoked.

       The call fails under the following conditions:

       [EPERM]	      The  caller is not the superuser and is not the owner of
		      the mount point.

       [EINVAL]	      The requested mounted-on directory is not in  the	 mount
		      table.

       [EBUSY]	      A	 process  is  holding a reference to a file located on
		      the file system.

       [EIO]	      An I/O error occurred while writing cached  file	system
		      information.

See Also
       mount(2), gfsi(5), mount(8nfs)

								   mount(2nfs)
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