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NetBSD 6.1.5 - man page for getfh (netbsd section 2)

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GETFH(2)			     BSD System Calls Manual				 GETFH(2)

     getfh -- get file handle

     Standard C Library (libc, -lc)

     #include <sys/types.h>
     #include <sys/mount.h>

     getfh(const char *path, void *fhp, size_t *fh_size);

     getfh() returns a file handle for the specified file or directory in the file handle pointed
     to by fhp.  The variable pointed to by fh_size has to be initialized to the memory allocated
     for the variable sized file handle.  On return the value will be replaced by the actual size
     needed (which will vary depending on the file system the path is on).  This system call is
     restricted to the superuser.  To query the necessary size for the filehandle, a NULL pointer
     may be passed as fhp, and the value pointed to by fh_size should be initialized to zero.

     Upon successful completion, a value of 0 is returned.  Otherwise, -1 is returned and the
     global variable errno is set to indicate the error.

     getfh() fails if one or more of the following are true:

     [ENOTDIR]		A component of the path prefix of path is not a directory.

     [ENAMETOOLONG]	The length of a component of path exceeds {NAME_MAX} characters, or the
			length of path exceeds {PATH_MAX} characters.

     [ENOENT]		The file referred to by path does not exist.

     [EACCES]		Search permission is denied for a component of the path prefix of path.

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

     [EFAULT]		fhp points to an invalid address.

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

     [E2BIG]		The memory allocated for the file handle is too small.	The size needed
			has been written to the variable pointed to by fh_size.

     [ENOMEM]		The kernel failed to allocate temporary memory to create a filehandle of
			the requested size.

     fhstat(2), fhstatvfs(2), fhstatvfs1(2)

     The getfh() function first appeared in 4.4BSD.

BSD					 October 30, 2006				      BSD
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