NAME    [Toc]    [Back]

     fhopen, fhstat, fhstatfs - access file via file handle

SYNOPSIS    [Toc]    [Back]

     #include <sys/types.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    [Toc]    [Back]

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

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

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

RETURN VALUES    [Toc]    [Back]

     Upon successful completion, fhopen() returns  the  file  descriptor for the
     opened file, while fhstat() and fhstatfs() return 0.  Otherwise, -1 is
     returned and errno is set to indicate the error.

ERRORS    [Toc]    [Back]

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

     [EINVAL]      Calling fhopen() with O_CREAT set.

     [ESTALE]      The file handle fhp is no longer valid.

SEE ALSO    [Toc]    [Back]

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

HISTORY    [Toc]    [Back]

     The fhopen(), fhstat(), and fhstatfs() functions  first  appeared in NetBSD
     1.5.

OpenBSD      3.6                           June      29,     1999