db/os/os_dir.c

/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997, 1998
 *  Sleepycat Software.  All rights reserved.
 */

#include "config.h"

#ifndef lint
static const char sccsid[] = "@(#)os_dir.c  10.19 (Sleepycat) 10/12/98";
#endif /* not lint */

#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

#include <errno.h>
#endif

#include "db_int.h"
#include "os_jump.h"

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

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

    if ((dirp = opendir(dir)) == NULL)
        return (errno);
    names = NULL;
    for (arraysz = cnt = 0; (dp = readdir(dirp)) != NULL; ++cnt) {
        if (cnt >= arraysz) {
            arraysz += 100;
            if ((ret = __os_realloc(&names,
                arraysz * sizeof(names[0]))) != 0)
                goto nomem;
        }
        if ((ret = __os_strdup(dp->d_name, &names[cnt])) != 0)
            goto nomem;
    }
    (void)closedir(dirp);

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

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

/*
 * __os_dirfree --
 *  Free the list of files.
 *
 * PUBLIC: void __os_dirfree __P((char **, int));
 */
void
__os_dirfree(names, cnt)
    char **names;
    int cnt;
{
    if (__db_jump.j_dirfree != NULL)
        __db_jump.j_dirfree(names, cnt);

    while (cnt > 0)
        __os_free(names[--cnt], 0);
    __os_free(names, 0);
}