NAME
getfsent,
getfsspec,
getfsfile,
setfsent,
endfsent —
get file system descriptor
file entry
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <fstab.h>
struct fstab *
getfsent(
void);
struct fstab *
getfsspec(
const
char *spec);
struct fstab *
getfsfile(
const
char *file);
int
setfsent(
void);
void
endfsent(
void);
DESCRIPTION
The
getfsent(),
getfsspec(), and
getfsfile() functions each return a pointer to an object
with the following structure containing the broken-out fields of a line in the
file system description file,
<fstab.h>.
struct fstab {
char *fs_spec; /* block special device name */
char *fs_file; /* file system path prefix */
char *fs_vfstype; /* type of file system */
char *fs_mntops; /* comma separated mount options */
char *fs_type; /* rw, ro, sw, or xx */
int fs_freq; /* dump frequency, in days */
int fs_passno; /* pass number on parallel dump */
};
The fields have meanings described in
fstab(5).
The
setfsent() function opens the file (closing any previously
opened file) or rewinds it if it is already open.
The
endfsent() function closes the file.
The
getfsspec() and
getfsfile() functions
search the entire file (opening it if necessary) for a matching special file
name or file system file name.
For programs wishing to read the entire database,
getfsent()
reads the next entry (opening the file if necessary).
All entries in the file with a type field equivalent to
FSTAB_XX
are ignored.
RETURN VALUES
The
getfsent(),
getfsspec(), and
getfsfile() functions return a null pointer (0) on
EOF
or error. The
setfsent()
function returns 0 on failure, 1 on success. The
endfsent()
function returns nothing.
FILES
- /etc/fstab
-
SEE ALSO
getfsspecname(3),
fstab(5)
HISTORY
The
getfsent() function appeared in
4.0BSD; the
endfsent(),
getfsfile(),
getfsspec(), and
setfsent() functions appeared in
4.3BSD.
BUGS
These functions use static data storage; if the data is needed for future use,
it should be copied before any subsequent calls overwrite it.