os_dir.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997-2005
 *      Sleepycat Software.  All rights reserved.
 *
 * $Id: os_dir.c,v 12.1 2005/06/16 20:23:23 bostic Exp $
 */

#include "db_config.h"

#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>

#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
# endif
# if HAVE_SYS_DIR_H
#  include <sys/dir.h>
# endif
# if HAVE_NDIR_H
#  include <ndir.h>
# endif
#endif

#endif

#include "db_int.h"

/*
 * __os_dirlist --
 *      Return a list of the files in a directory.
 *
 * PUBLIC: int __os_dirlist __P((DB_ENV *, const char *, char ***, int *));
 */
int
__os_dirlist(dbenv, dir, namesp, cntp)
        DB_ENV *dbenv;
        const char *dir;
        char ***namesp;
        int *cntp;
{
        struct dirent *dp;
        DIR *dirp;
        int arraysz, cnt, ret;
        char **names;

        if (DB_GLOBAL(j_dirlist) != NULL)
                return (DB_GLOBAL(j_dirlist)(dir, namesp, cntp));

#ifdef HAVE_VXWORKS
        if ((dirp = opendir((char *)dir)) == NULL)
#else
        if ((dirp = opendir(dir)) == NULL)
#endif
                return (__os_get_errno());
        names = NULL;
        for (arraysz = cnt = 0; (dp = readdir(dirp)) != NULL; ++cnt) {
                if (cnt >= arraysz) {
                        arraysz += 100;
                        if ((ret = __os_realloc(dbenv,
                            (u_int)arraysz * sizeof(names[0]), &names)) != 0)
                                goto nomem;
                }
                if ((ret = __os_strdup(dbenv, dp->d_name, &names[cnt])) != 0)
                        goto nomem;
        }
        (void)closedir(dirp);

        *namesp = names;
        *cntp = cnt;
        return (0);

nomem:  if (names != NULL)
                __os_dirfree(dbenv, names, cnt);
        if (dirp != NULL)
                (void)closedir(dirp);
        return (ret);
}

/*
 * __os_dirfree --
 *      Free the list of files.
 *
 * PUBLIC: void __os_dirfree __P((DB_ENV *, char **, int));
 */
void
__os_dirfree(dbenv, names, cnt)
        DB_ENV *dbenv;
        char **names;
        int cnt;
{
        if (DB_GLOBAL(j_dirfree) != NULL)
                DB_GLOBAL(j_dirfree)(names, cnt);
        else {
                while (cnt > 0)
                        __os_free(dbenv, names[--cnt]);
                __os_free(dbenv, names);
        }
}

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