[PATCH v1] Port ndbm
Gedare Bloom
gedare at rtems.org
Fri Jun 21 18:08:29 UTC 2019
On Fri, Jun 21, 2019 at 11:03 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com> wrote:
>
>
>
> On Fri, Jun 21, 2019, 9:46 PM Gedare Bloom <gedare at rtems.org> wrote:
>>
>> On Fri, Jun 21, 2019 at 4:25 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com> wrote:
>> >
>> > Hello Gedare,
>> > As you suggested, I have placed nbm.c in libc/search directory. This directory contains hash.h, db_local.h, hash.c. And all these are required by ndbm.
>> > .
>> > Here newlib got successfully compiled and It was generating function symbols.
>> > .
>> > After that when i added the patch to RSB, and tried to compile a test to check if ndbm is ported successfully or not.
>> > It gave me error:
>> > ........
>> > ........
>> > mv -f fileio/.deps/fileio-init.Tpo fileio/.deps/fileio-init.Po
>> > sparc-rtems5-gcc -DHAVE_CONFIG_H -I. -I/home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/samples -I. -I/home/varodek/development/rtems/kernel/erc32/sparc-rtems5/c/erc32/include -I/home/varodek/development/rtems/kernel/rtems/cpukit/include -I/home/varodek/development/rtems/kernel/rtems/cpukit/score/cpu/sparc/include -I/home/varodek/development/rtems/kernel/erc32/sparc-rtems5/c/erc32/lib/libbsp/sparc/erc32/include -I/home/varodek/development/rtems/kernel/rtems/bsps/include -I/home/varodek/development/rtems/kernel/rtems/bsps/sparc/include -I/home/varodek/development/rtems/kernel/rtems/bsps/sparc/erc32/include -DT_FILE_NAME='"init.c"' -I/home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/samples/../support/include -mcpu=cypress -O2 -g -ffunction-sections -fdata-sections -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs -MT hello/hello-init.o -MD -MP -MF hello/.deps/hello-init.Tpo -c -o hello/hello-init.o `test -f 'hello/init.c' || echo '/home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/samples/'`hello/init.c
>> > In file included from /home/varodek/development/rtems/kernel/rtems/c/src/../../testsuites/samples/hello/init.c:17:0:
>> > /home/varodek/development/rtems/5/sparc-rtems5/include/ndbm.h:43:10: fatal error: db_local.h: No such file or directory
>> > #include <db_local.h>
>> > ^~~~~~~~~~~~
>> >
>> > .
>> > I found that db_local.h is not present in rtems/5 directory.
>> >
>>
>> I suspect that the headers in search/ are not installed, they are only
>> to be included during compilation of newlib, and probably should be
>> included by #include "db_local.h" for example. I also find it likely
>
> ndbm.h is in libc/include, db_local.h is in libc/search.
> I will have to use #include"../search/db_local.h" which itself is a very bad way to do so.
Definitely shouldn't do that.
>>
>> that you should not be including these non-installed headers from
>> installed headers inside of libc/include.
>>
>> So, you might need to rewrite the ndbm.h so that it does not rely on
>> some internal headers of newlib.... Just my two cents. Not sure if I'm
>> right. :)
>
> I can do one thing. db_local.h contains some data structures. Also it contains some function declarations, definitions of which are present in hash.h.
>.
> So i can put those declarations and data structures directly in ndbm.h, so won't need to call db_local.h
>
It would be better if you can remove anything requiring db_local.h
from ndbm.h so that you don't have to #include db_local.h. You could
put those things into maybe db_local.h, or into some new file like
search/ndbm_local.h or something. you might need some guidance from
newlib maintainers about what is the right way to split the
public/private sides of headers like this.
The basic idea is, how to make it so that #include <ndbm.h> doesn't
need to include db_local.h? Instead, you can modify ndbm.c to do
something lilke #include "db_local.h" and #include "ndbm_local.h"
itself. This way, the ndbm.h header file does not need to "leak" the
details of db_local.h to userland.
Gedare
.
> Will this be practical?
>>
>>
>>
>> > Thank you
>> > Vaibhav Gupta
>> >
>> > On Fri, Jun 21, 2019 at 1:57 AM Vaibhav Gupta <vaibhavgupta40 at gmail.com> wrote:
>> >>
>> >> ---
>> >> newlib/libc/include/ndbm.h | 84 +++++++++++++
>> >> newlib/libc/search/Makefile.am | 1 +
>> >> newlib/libc/search/ndbm.c | 214 +++++++++++++++++++++++++++++++++
>> >> 3 files changed, 299 insertions(+)
>> >> create mode 100644 newlib/libc/include/ndbm.h
>> >> create mode 100644 newlib/libc/search/ndbm.c
>> >>
>> >> diff --git a/newlib/libc/include/ndbm.h b/newlib/libc/include/ndbm.h
>> >> new file mode 100644
>> >> index 000000000..f89f97dd0
>> >> --- /dev/null
>> >> +++ b/newlib/libc/include/ndbm.h
>> >> @@ -0,0 +1,84 @@
>> >> +/*-
>> >> + * SPDX-License-Identifier: BSD-3-Clause
>> >> + *
>> >> + * Copyright (c) 1990, 1993
>> >> + * The Regents of the University of California. All rights reserved.
>> >> + *
>> >> + * This code is derived from software contributed to Berkeley by
>> >> + * Margo Seltzer.
>> >> + *
>> >> + * Redistribution and use in source and binary forms, with or without
>> >> + * modification, are permitted provided that the following conditions
>> >> + * are met:
>> >> + * 1. Redistributions of source code must retain the above copyright
>> >> + * notice, this list of conditions and the following disclaimer.
>> >> + * 2. Redistributions in binary form must reproduce the above copyright
>> >> + * notice, this list of conditions and the following disclaimer in the
>> >> + * documentation and/or other materials provided with the distribution.
>> >> + * 3. Neither the name of the University nor the names of its contributors
>> >> + * may be used to endorse or promote products derived from this software
>> >> + * without specific prior written permission.
>> >> + *
>> >> + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
>> >> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>> >> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>> >> + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
>> >> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>> >> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>> >> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>> >> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>> >> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>> >> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>> >> + * SUCH DAMAGE.
>> >> + *
>> >> + * @(#)ndbm.h 8.1 (Berkeley) 6/2/93
>> >> + * $FreeBSD$
>> >> + */
>> >> +
>> >> +#ifndef _NDBM_H_
>> >> +#define _NDBM_H_
>> >> +
>> >> +#define __DBINTERFACE_PRIVATE
>> >> +
>> >> +#include <db_local.h>
>> >> +
>> >> +/* Map dbm interface onto db(3). */
>> >> +#define DBM_RDONLY O_RDONLY
>> >> +
>> >> +/* Flags to dbm_store(). */
>> >> +#define DBM_INSERT 0
>> >> +#define DBM_REPLACE 1
>> >> +
>> >> +/*
>> >> + * The db(3) support for ndbm always appends this suffix to the
>> >> + * file name to avoid overwriting the user's original database.
>> >> + */
>> >> +#define DBM_SUFFIX ".db"
>> >> +
>> >> +typedef struct {
>> >> + void *dptr;
>> >> + int dsize; /* XXX Should be size_t according to 1003.1-2008. */
>> >> +} datum;
>> >> +
>> >> +typedef DB DBM;
>> >> +#define dbm_pagfno(a) DBM_PAGFNO_NOT_AVAILABLE
>> >> +
>> >> +__BEGIN_DECLS
>> >> +int dbm_clearerr(DBM *);
>> >> +void dbm_close(DBM *);
>> >> +int dbm_delete(DBM *, datum);
>> >> +int dbm_error(DBM *);
>> >> +datum dbm_fetch(DBM *, datum);
>> >> +datum dbm_firstkey(DBM *);
>> >> +#if __BSD_VISIBLE
>> >> +long dbm_forder(DBM *, datum);
>> >> +#endif
>> >> +datum dbm_nextkey(DBM *);
>> >> +DBM *dbm_open(const char *, int, mode_t);
>> >> +int dbm_store(DBM *, datum, datum, int);
>> >> +#if __BSD_VISIBLE
>> >> +int dbm_dirfno(DBM *);
>> >> +#endif
>> >> +__END_DECLS
>> >> +
>> >> +#endif /* !_NDBM_H_ */
>> >> diff --git a/newlib/libc/search/Makefile.am b/newlib/libc/search/Makefile.am
>> >> index 98920c3f4..a61107fb9 100644
>> >> --- a/newlib/libc/search/Makefile.am
>> >> +++ b/newlib/libc/search/Makefile.am
>> >> @@ -9,6 +9,7 @@ GENERAL_SOURCES = \
>> >> db_local.h \
>> >> extern.h \
>> >> hash.h \
>> >> + ndbm.c \
>> >> page.h \
>> >> qsort.c
>> >>
>> >> diff --git a/newlib/libc/search/ndbm.c b/newlib/libc/search/ndbm.c
>> >> new file mode 100644
>> >> index 000000000..bd9c71e4f
>> >> --- /dev/null
>> >> +++ b/newlib/libc/search/ndbm.c
>> >> @@ -0,0 +1,214 @@
>> >> +/*-
>> >> + * SPDX-License-Identifier: BSD-3-Clause
>> >> + *
>> >> + * Copyright (c) 1990, 1993
>> >> + * The Regents of the University of California. All rights reserved.
>> >> + *
>> >> + * This code is derived from software contributed to Berkeley by
>> >> + * Margo Seltzer.
>> >> + *
>> >> + * Redistribution and use in source and binary forms, with or without
>> >> + * modification, are permitted provided that the following conditions
>> >> + * are met:
>> >> + * 1. Redistributions of source code must retain the above copyright
>> >> + * notice, this list of conditions and the following disclaimer.
>> >> + * 2. Redistributions in binary form must reproduce the above copyright
>> >> + * notice, this list of conditions and the following disclaimer in the
>> >> + * documentation and/or other materials provided with the distribution.
>> >> + * 3. Neither the name of the University nor the names of its contributors
>> >> + * may be used to endorse or promote products derived from this software
>> >> + * without specific prior written permission.
>> >> + *
>> >> + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
>> >> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>> >> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
>> >> + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
>> >> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
>> >> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
>> >> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
>> >> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
>> >> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
>> >> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
>> >> + * SUCH DAMAGE.
>> >> + */
>> >> +
>> >> +#if defined(LIBC_SCCS) && !defined(lint)
>> >> +static char sccsid[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94";
>> >> +#endif /* LIBC_SCCS and not lint */
>> >> +#include <sys/cdefs.h>
>> >> +__FBSDID("$FreeBSD$");
>> >> +
>> >> +/*
>> >> + * This package provides a dbm compatible interface to the new hashing
>> >> + * package described in db(3).
>> >> + */
>> >> +
>> >> +#include <sys/param.h>
>> >> +
>> >> +#include <stdio.h>
>> >> +#include <string.h>
>> >> +#include <errno.h>
>> >> +
>> >> +#include <ndbm.h>
>> >> +#include "hash.h"
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * *DBM on success
>> >> + * NULL on failure
>> >> + */
>> >> +extern DBM *
>> >> +dbm_open(const char *file, int flags, mode_t mode)
>> >> +{
>> >> + HASHINFO info;
>> >> + char path[MAXPATHLEN];
>> >> +
>> >> + info.bsize = 4096;
>> >> + info.ffactor = 40;
>> >> + info.nelem = 1;
>> >> + info.cachesize = 0;
>> >> + info.hash = NULL;
>> >> + info.lorder = 0;
>> >> +
>> >> + if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) {
>> >> + errno = ENAMETOOLONG;
>> >> + return(NULL);
>> >> + }
>> >> + (void)strcpy(path, file);
>> >> + (void)strcat(path, DBM_SUFFIX);
>> >> + return ((DBM *)__hash_open(path, flags, mode, 0, &info));
>> >> +}
>> >> +
>> >> +extern void
>> >> +dbm_close(DBM *db)
>> >> +{
>> >> + (void)(db->close)(db);
>> >> +}
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * DATUM on success
>> >> + * NULL on failure
>> >> + */
>> >> +extern datum
>> >> +dbm_fetch(DBM *db, datum key)
>> >> +{
>> >> + datum retdata;
>> >> + int status;
>> >> + DBT dbtkey, dbtretdata;
>> >> +
>> >> + dbtkey.data = key.dptr;
>> >> + dbtkey.size = key.dsize;
>> >> + status = (db->get)(db, &dbtkey, &dbtretdata, 0);
>> >> + if (status) {
>> >> + dbtretdata.data = NULL;
>> >> + dbtretdata.size = 0;
>> >> + }
>> >> + retdata.dptr = dbtretdata.data;
>> >> + retdata.dsize = dbtretdata.size;
>> >> + return (retdata);
>> >> +}
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * DATUM on success
>> >> + * NULL on failure
>> >> + */
>> >> +extern datum
>> >> +dbm_firstkey(DBM *db)
>> >> +{
>> >> + int status;
>> >> + datum retkey;
>> >> + DBT dbtretkey, dbtretdata;
>> >> +
>> >> + status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST);
>> >> + if (status)
>> >> + dbtretkey.data = NULL;
>> >> + retkey.dptr = dbtretkey.data;
>> >> + retkey.dsize = dbtretkey.size;
>> >> + return (retkey);
>> >> +}
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * DATUM on success
>> >> + * NULL on failure
>> >> + */
>> >> +extern datum
>> >> +dbm_nextkey(DBM *db)
>> >> +{
>> >> + int status;
>> >> + datum retkey;
>> >> + DBT dbtretkey, dbtretdata;
>> >> +
>> >> + status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT);
>> >> + if (status)
>> >> + dbtretkey.data = NULL;
>> >> + retkey.dptr = dbtretkey.data;
>> >> + retkey.dsize = dbtretkey.size;
>> >> + return (retkey);
>> >> +}
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * 0 on success
>> >> + * <0 failure
>> >> + */
>> >> +extern int
>> >> +dbm_delete(DBM *db, datum key)
>> >> +{
>> >> + int status;
>> >> + DBT dbtkey;
>> >> +
>> >> + dbtkey.data = key.dptr;
>> >> + dbtkey.size = key.dsize;
>> >> + status = (db->del)(db, &dbtkey, 0);
>> >> + if (status)
>> >> + return (-1);
>> >> + else
>> >> + return (0);
>> >> +}
>> >> +
>> >> +/*
>> >> + * Returns:
>> >> + * 0 on success
>> >> + * <0 failure
>> >> + * 1 if DBM_INSERT and entry exists
>> >> + */
>> >> +extern int
>> >> +dbm_store(DBM *db, datum key, datum data, int flags)
>> >> +{
>> >> + DBT dbtkey, dbtdata;
>> >> +
>> >> + dbtkey.data = key.dptr;
>> >> + dbtkey.size = key.dsize;
>> >> + dbtdata.data = data.dptr;
>> >> + dbtdata.size = data.dsize;
>> >> + return ((db->put)(db, &dbtkey, &dbtdata,
>> >> + (flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
>> >> +}
>> >> +
>> >> +extern int
>> >> +dbm_error(DBM *db)
>> >> +{
>> >> + HTAB *hp;
>> >> +
>> >> + hp = (HTAB *)db->internal;
>> >> + return (hp->error);
>> >> +}
>> >> +
>> >> +extern int
>> >> +dbm_clearerr(DBM *db)
>> >> +{
>> >> + HTAB *hp;
>> >> +
>> >> + hp = (HTAB *)db->internal;
>> >> + hp->error = 0;
>> >> + return (0);
>> >> +}
>> >> +
>> >> +extern int
>> >> +dbm_dirfno(DBM *db)
>> >> +{
>> >> + return(((HTAB *)db->internal)->fp);
>> >> +}
>> >> --
>> >> 2.21.0
>> >>
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