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NAME
     access - return access mode (r,w,x) or existence of a file

SYNOPSIS
     integer*4 function access (name, mode)
     character*(*) name, mode

USAGE
     Example: ierr = access ( 'MyFile', 'r' )

DESCRIPTION
     The access function checks the given file, name, for  acces-
     sability  with  respect to the caller according to mode. The
     mode argument can include, in any order, and in any combina-
     tion, one or more of the following:

     r    Test for read permission

     w    Test for write permission

     x    Test for execute permission

     (blank)
          Test for existence

     An error code is returned if either the argument is illegal,
     or  if  the  file cannot be accessed in all of the specified
     modes.  0 is returned if the specified access would be  suc-
     cessful.

EXAMPLE
     To test for read and write permission:

               integer*4 access, st
               st = access('anyfile.data', 'rw')
               if( st .ne.0 ) print*, 'Cannot read/write file'

FILES
     libF77.a

SEE ALSO
     access(2), gerror(3F), perror(3F)

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