db/os/os_oflags.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_oflags.c   10.6 (Sleepycat) 4/19/98";
#endif /* not lint */

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

#include <fcntl.h>
#endif

#include "db_int.h"

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

    /*
     * XXX
     * Convert POSIX 1003.1 open(2) flags to DB flags.  Not an exact
     * science as most POSIX implementations don't have a flag value
     * for O_RDONLY, it's simply the lack of a write flag.
     */
    dbflags = 0;
    if (oflags & O_CREAT)
        dbflags |= DB_CREATE;
    if (!(oflags & (O_RDWR | O_WRONLY)) || oflags & O_RDONLY)
        dbflags |= DB_RDONLY;
    if (oflags & O_TRUNC)
        dbflags |= DB_TRUNCATE;
    return (dbflags);
}

/*
 * __db_omode --
 *  Convert a permission string to the correct open(2) flags.
 *
 * PUBLIC: int __db_omode __P((const char *));
 */
int
__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);
}