NAME
getfsent,
getfsspec, getfsfile,
setfsent, endfsent —
get file system descriptor file
entry
LIBRARY
library “libc”
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
Thegetfsent(),
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
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.