os_oflags.c

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/*-
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 1997, 1998, 1999, 2000
 *      Sleepycat Software.  All rights reserved.
 */

#include "config.h"

#ifndef lint
static const char revid[] = "$Id: os__oflags_8c-source.html,v 1.1 2008/06/08 10:21:24 sebdiaz Exp $";
#endif /* not lint */

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

#include <fcntl.h>
#endif

#include "db_int.h"

/*
 * CDB___db_oflags --
 *      Convert open(2) flags to DB flags.
 *
 * PUBLIC: u_int32_t CDB___db_oflags __P((int));
 */
u_int32_t
CDB___db_oflags(oflags)
        int oflags;
{
        u_int32_t dbflags;

        dbflags = 0;

        if (oflags & O_CREAT)
                dbflags |= DB_CREATE;

        if (oflags & O_TRUNC)
                dbflags |= DB_TRUNCATE;

        /*
         * !!!
         * Convert POSIX 1003.1 open(2) mode flags to DB flags.  This isn't
         * an exact science as few POSIX implementations have a flag value
         * for O_RDONLY, it's simply the lack of a write flag.
         */
#ifndef O_ACCMODE
#define O_ACCMODE       (O_RDONLY | O_RDWR | O_WRONLY)
#endif
        switch (oflags & O_ACCMODE) {
        case O_RDWR:
        case O_WRONLY:
                break;
        default:
                dbflags |= DB_RDONLY;
                break;
        }
        return (dbflags);
}

/*
 * CDB___db_omode --
 *      Convert a permission string to the correct open(2) flags.
 *
 * PUBLIC: int CDB___db_omode __P((const char *));
 */
int
CDB___db_omode(perm)
        const char *perm;
{
        int mode;

#ifndef S_IRUSR
#if defined(_WIN32) || defined(WIN16)
#define S_IRUSR S_IREAD         /* R for owner */
#define S_IWUSR S_IWRITE        /* W for owner */
#define S_IRGRP 0               /* R for group */
#define S_IWGRP 0               /* W for group */
#define S_IROTH 0               /* R for other */
#define S_IWOTH 0               /* W for other */
#else
#define S_IRUSR 0000400         /* R for owner */
#define S_IWUSR 0000200         /* W for owner */
#define S_IRGRP 0000040         /* R for group */
#define S_IWGRP 0000020         /* W for group */
#define S_IROTH 0000004         /* R for other */
#define S_IWOTH 0000002         /* W for other */
#endif /* _WIN32 || WIN16 */
#endif
        mode = 0;
        if (perm[0] == 'r')
                mode |= S_IRUSR;
        if (perm[1] == 'w')
                mode |= S_IWUSR;
        if (perm[2] == 'r')
                mode |= S_IRGRP;
        if (perm[3] == 'w')
                mode |= S_IWGRP;
        if (perm[4] == 'r')
                mode |= S_IROTH;
        if (perm[5] == 'w')
                mode |= S_IWOTH;
        return (mode);
}

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