mdoc(7) cleanup.
This commit is contained in:
parent
df17ff7fa5
commit
95cf33c567
@ -18,17 +18,18 @@
|
||||
.\" Note: The date here should be updated whenever a non-trivial
|
||||
.\" change is made to the manual page.
|
||||
.Dd July 7, 1999
|
||||
.Dt dbm 3
|
||||
.Dt DBM 3
|
||||
.Os
|
||||
.Sh NAME
|
||||
.Nm dbm_clearerr Ns No ,
|
||||
.Nm dbm_close Ns No ,
|
||||
.Nm dbm_delete Ns No ,
|
||||
.Nm dbm_dirfno Ns No ,
|
||||
.Nm dbm_error Ns No ,
|
||||
.Nm dbm_fetch Ns No ,
|
||||
.Nm dbm_firstkey Ns No ,
|
||||
.Nm dbm_nextkey Ns No ,
|
||||
.Nm dbm_open Ns No ,
|
||||
.Nm dbm_clearerr ,
|
||||
.Nm dbm_close ,
|
||||
.Nm dbm_delete ,
|
||||
.Nm dbm_dirfno ,
|
||||
.Nm dbm_error ,
|
||||
.Nm dbm_fetch ,
|
||||
.Nm dbm_firstkey ,
|
||||
.Nm dbm_nextkey ,
|
||||
.Nm dbm_open ,
|
||||
.Nm dbm_store
|
||||
.Nd database access functions
|
||||
.Sh SYNOPSIS
|
||||
@ -54,147 +55,142 @@
|
||||
.Fn dbm_clearerr "DBM *db"
|
||||
.Ft int
|
||||
.Fn dbm_dirfno "DBM *db"
|
||||
|
||||
.Sh DESCRIPTION
|
||||
Database access functions.
|
||||
These functions are implemented using
|
||||
.Fn dbopen
|
||||
(see
|
||||
.Xr dbopen 3 Ns No )
|
||||
with a
|
||||
.Nm hash
|
||||
(see
|
||||
.Xr hash 3 Ns No )
|
||||
These functions are implemented using
|
||||
.Xr dbopen 3
|
||||
with a
|
||||
.Xr hash 3
|
||||
database.
|
||||
|
||||
.Fa datum
|
||||
.Pp
|
||||
.Vt datum
|
||||
is declared in
|
||||
.Pa ndbm.h Ns No :
|
||||
.Aq Pa ndbm.h :
|
||||
.Bd -literal
|
||||
typedef struct {
|
||||
char *dptr;
|
||||
int dsize;
|
||||
char *dptr;
|
||||
int dsize;
|
||||
} datum;
|
||||
.Ed
|
||||
|
||||
|
||||
.Pp
|
||||
.Fn dbm_open base flags mode
|
||||
opens or creates a database.
|
||||
.Fa base No is the basename of the file containing
|
||||
.Fa base
|
||||
is the basename of the file containing
|
||||
the database; the actual database has a
|
||||
.Sq .db
|
||||
suffix. I.e., if
|
||||
.Pa .db
|
||||
suffix.
|
||||
I.e., if
|
||||
.Fa base
|
||||
is
|
||||
.Pa /home/me/mystuff
|
||||
.Qq Li /home/me/mystuff
|
||||
then the actual database is in the file
|
||||
.Pa /home/me/mystuff.db Ns No .
|
||||
.Fa flags No and
|
||||
.Fa mode No are passed to
|
||||
.Fn open No (see
|
||||
.Xr open 2 Ns No ).
|
||||
.Li O_RDWR | O_CREAT
|
||||
.Pa /home/me/mystuff.db .
|
||||
.Fa flags
|
||||
and
|
||||
.Fa mode
|
||||
are passed to
|
||||
.Xr open 2 .
|
||||
.Pq Dv O_RDWR \*(Ba O_CREAT
|
||||
is a typical value for
|
||||
.Fa flags Ns No ;
|
||||
.Fa flags ;
|
||||
.Li 0660
|
||||
is a typical value for
|
||||
.Fa mode Ns No .
|
||||
.Li O_WRONLY
|
||||
.Fa mode .
|
||||
.Dv O_WRONLY
|
||||
is not allowed in
|
||||
.Fa flags Ns No .
|
||||
.Fa flags .
|
||||
The pointer returned by
|
||||
.Fn dbm_open
|
||||
identifies the database and is the
|
||||
.Fa db
|
||||
argument to the other functions.
|
||||
.Fn dbm_open
|
||||
returns
|
||||
.Li NULL
|
||||
and sets
|
||||
.Fn dbm_open
|
||||
returns
|
||||
.Dv NULL
|
||||
and sets
|
||||
.Va errno
|
||||
if there are any errors.
|
||||
|
||||
if there were any errors.
|
||||
.Pp
|
||||
.Fn dbm_close db
|
||||
closes the database.
|
||||
.Fn dbm_close
|
||||
normally returns zero.
|
||||
|
||||
.Pp
|
||||
.Fn dbm_store db key data flags
|
||||
inserts or replaces an entry in the database.
|
||||
.Fa flags No is either
|
||||
.Li DBM_INSERT
|
||||
or
|
||||
.Li DBM_REPLACE Ns No .
|
||||
If
|
||||
.Fa flags
|
||||
is
|
||||
.Li DBM_INSERT
|
||||
and the database already contains an entry for
|
||||
.Fa key Ns No ,
|
||||
that entry is not replaced. Otherwise the entry is replaced or inserted.
|
||||
.Fn dbm_store
|
||||
normally returns returns zero but returns 1 if the entry could not be
|
||||
inserted (because
|
||||
inserts or replaces an entry in the database.
|
||||
.Fa flags
|
||||
is either
|
||||
.Dv DBM_INSERT
|
||||
or
|
||||
.Dv DBM_REPLACE .
|
||||
If
|
||||
.Fa flags
|
||||
is
|
||||
.Li DBM_INSERT
|
||||
.Dv DBM_INSERT
|
||||
and the database already contains an entry for
|
||||
.Fa key ,
|
||||
that entry is not replaced.
|
||||
Otherwise the entry is replaced or inserted.
|
||||
.Fn dbm_store
|
||||
normally returns returns zero but returns 1 if the entry could not be
|
||||
inserted (because
|
||||
.Fa flags
|
||||
is
|
||||
.Dv DBM_INSERT ,
|
||||
and an entry with
|
||||
.Fa key
|
||||
already exists) or returns -1 and sets
|
||||
.Va errno
|
||||
if there were any errors.
|
||||
|
||||
.Pp
|
||||
.Fn dbm_fetch db key
|
||||
returns
|
||||
.Li NULL
|
||||
returns
|
||||
.Dv NULL
|
||||
or the
|
||||
.Fa data
|
||||
corresponding to
|
||||
.Fa key Ns No .
|
||||
|
||||
.Fa data
|
||||
corresponding to
|
||||
.Fa key .
|
||||
.Pp
|
||||
.Fn dbm_delete db key
|
||||
deletes the entry for
|
||||
.Fa key Ns No .
|
||||
.Fa key .
|
||||
.Fn dbm_delete
|
||||
normally returns zero but returns 1 if there was no entry with
|
||||
.Fa key
|
||||
in the database or returns -1 and sets
|
||||
.Va errno
|
||||
in the database or returns -1 and sets
|
||||
.Va errno
|
||||
if there were any errors.
|
||||
|
||||
.Pp
|
||||
.Fn dbm_firstkey db
|
||||
returns the first key in the database.
|
||||
.Fn dbm_nextkey db
|
||||
returns subsequent keys.
|
||||
.Fn db_firstkey
|
||||
must be called before
|
||||
.Fn dbm_nextkey.
|
||||
returns subsequent keys.
|
||||
.Fn db_firstkey
|
||||
must be called before
|
||||
.Fn dbm_nextkey .
|
||||
The order in which keys are returned is unspecified and may appear
|
||||
random.
|
||||
.Fn dbm_nextkey
|
||||
returns
|
||||
.Li NULL
|
||||
returns
|
||||
.Dv NULL
|
||||
after all keys have been returned.
|
||||
|
||||
.Pp
|
||||
.Fn dbm_error db
|
||||
returns the
|
||||
returns the
|
||||
.Va errno
|
||||
value of the most recent error.
|
||||
.Fn dbm_clearerr db
|
||||
resets this value to 0 and returns 0.
|
||||
|
||||
.Pp
|
||||
.Fn dbm_dirfno db
|
||||
returns the file descriptor to the database.
|
||||
|
||||
|
||||
.Sh SEE ALSO
|
||||
.Xr dbopen 3 Ns ,
|
||||
.Xr hash 3 Ns ,
|
||||
.Xr open 2
|
||||
|
||||
.Xr open 2 ,
|
||||
.Xr dbopen 3 ,
|
||||
.Xr hash 3
|
||||
.Sh STANDARDS
|
||||
These functions (except
|
||||
.Fn dbm_dirfno Ns No )
|
||||
are included in the Single Unix Specification for Unix 98.
|
||||
|
||||
|
||||
These functions (except
|
||||
.Fn dbm_dirfno )
|
||||
are included in the
|
||||
.St -susv2 .
|
||||
|
Loading…
Reference in New Issue
Block a user