opendisk(3) [netbsd man page]

OPENDISK(3)						   BSD Library Functions Manual 					       OPENDISK(3)

NAME

     opendisk -- open a disk partition

LIBRARY

     System Utilities Library (libutil, -lutil)

SYNOPSIS

     #include <util.h>

     int
     opendisk(const char *path, int flags, char *buf, size_t buflen, int iscooked);

DESCRIPTION

     opendisk() opens path, for reading and/or writing as specified by the argument flags using open(2), and the file descriptor is returned to
     the caller.  buf is used to store the resultant filename.	buflen is the size, in bytes, of the array referenced by buf (usually MAXPATHLEN
     bytes).  iscooked controls which paths in /dev are tried.

     opendisk() attempts to open the following variations of path, in order:

     path	  The pathname as given.

     pathX	  path with a suffix of 'X', where 'X' represents the raw partition of the device, as determined by getrawpartition(3), usually
		  ``c''.

     If path does not contain a slash (``/''), the following variations are attempted:

	   -   If iscooked is zero:

	       /dev/rpath   path with a prefix of ``/dev/r''.

	       /dev/rpathX  path with a prefix of ``/dev/r'' and a suffix of 'X' (q.v.).

	   -   If iscooked is non-zero:

	       /dev/path    path with a prefix of ``/dev/''.

	       /dev/pathX   path with a prefix of ``/dev/'' and a suffix of 'X' (q.v.).

RETURN VALUES

     An open file descriptor, or -1 if the open(2) failed.

ERRORS

     opendisk() may set errno to one of the following values:

     [EINVAL]		O_CREAT was set in flags, or getrawpartition(3) didn't return a valid partition.

     [EFAULT]		buf was the NULL pointer.

     The opendisk() function may also set errno to any value specified by the open(2) function.

SEE ALSO

     open(2), getrawpartition(3)

HISTORY

     The opendisk() function first appeared in NetBSD 1.3.

BSD
								 December 11, 2001							       BSD

STATVFS(2)						      BSD System Calls Manual							STATVFS(2)

NAME

     statvfs, statvfs1, fstatvfs, fstatvfs1 -- get file system statistics

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/statvfs.h>

     int
     statvfs(const char *path, struct statvfs *buf);

     int
     statvfs1(const char *path, struct statvfs *buf, int flags);

     int
     fstatvfs(int fd, struct statvfs *buf);

     int
     fstatvfs1(int fd, struct statvfs *buf, int flags);

DESCRIPTION

     statvfs() and statvfs1() return information about a mounted file system.  path is the path name of any file within the mounted file system.
     buf is a pointer to a statvfs structure defined in statvfs(5).

     fstatvfs() and fstatvfs1() return the same information about an open file referenced by descriptor fd.

     The statvfs1() and fstatvfs1() functions allow an extra flags argument which can be ST_WAIT and ST_NOWAIT.  When ST_NOWAIT is specified, then
     only cached statistics are returned.  This can result in significant savings on non-local filesystems, where gathering statistics involves a
     network communication.

     The statvfs() and fstatvfs() calls are equivalent to the respective statvfs1() and fstatvfs1() calls with ST_WAIT specified as the flags
     argument.

RETURN VALUES

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

ERRORS

     statvfs() and statvfs1() fail 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]		buf or path points to an invalid address.

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

     fstatvfs() and fstatvfs1() fail if one or more of the following are true:

     [EBADF]		fd is not a valid open file descriptor.

     [EFAULT]		buf points to an invalid address.

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

SEE ALSO

     statvfs(5)

HISTORY

     The statvfs(), statvfs1(), fstatvfs(), and fstatvfs1() functions first appeared in NetBSD 3.0 to replace the statfs() family of functions
     which first appeared in 4.4BSD.

BSD
								  April 14, 2004							       BSD