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fhstatfs ()
  • >> fhstatfs (2) ( FreeBSD man: Системные вызовы )

  • BSD mandoc
     

    NAME

    
    
    fhopen
    
     
    fhstat
    
     
    fhstatfs
    
     - access file via file handle
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <sys/param.h>
       #include <sys/mount.h>
       #include <sys/stat.h>
    int fhopen (const fhandle_t *fhp int flags);
    int fhstat (const fhandle_t *fhp struct stat *sb);
    int fhstatfs (const fhandle_t *fhp struct statfs *buf);
     

    DESCRIPTION

    These system calls provide a means to access a file given the file handle Fa fhp . As this method bypasses directory access restrictions, these calls are restricted to the superuser.

    The fhopen ();
    system call opens the file referenced by Fa fhp for reading and/or writing as specified by the argument Fa flags and returns the file descriptor to the calling process. The Fa flags argument is specified by or 'ing together the flags used for the open(2) system call. All said flags are valid except for O_CREAT

    The fhstat ();
    and fhstatfs ();
    system calls provide the functionality of the fstat(2) and fstatfs(2) calls except that they return information for the file referred to by Fa fhp rather than an open file.  

    RETURN VALUES

    Upon successful completion, fhopen ();
    returns the file descriptor for the opened file; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

    Rv -std fhstat fhstatfs  

    ERRORS

    In addition to the errors returned by open(2), fstat(2), and fstatfs(2) respectively, fhopen (,);
    fhstat (,);
    and fhstatfs ();
    will return

    Bq Er EINVAL
    Calling fhopen ();
    with O_CREAT set.
    Bq Er ESTALE
    The file handle Fa fhp is no longer valid.

     

    SEE ALSO

    fstat(2), fstatfs(2), getfh(2), open(2)  

    HISTORY

    The fhopen (,);
    fhstat (,);
    and fhstatfs ();
    system calls first appeared in Nx 1.5 and were adapted to Fx 4.0 by An Alfred Perlstein .  

    AUTHORS

    This manual page was written by An William Studenmund for Nx .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    HISTORY
    AUTHORS


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