os2io.c

Netscape NSPR库源码

_PR_MD_OPEN_DIR(_MDDir *d, const char *name)
{
    char filename[ CCHMAXPATH ];
    PRUword numEntries, rc;

    numEntries = 1;

    PR_snprintf(filename, CCHMAXPATH, "%s%s%s",
                name, PR_DIRECTORY_SEPARATOR_STR, "*.*");
    FlipSlashes( filename, strlen(filename) );

    d->d_hdl = HDIR_CREATE;

    rc = DosFindFirst( filename,
                       &d->d_hdl,
                       FILE_DIRECTORY | FILE_HIDDEN,
                       &(d->d_entry),
                       sizeof(d->d_entry),
                       &numEntries,
                       FIL_STANDARD);
    if ( rc != NO_ERROR ) {
		_PR_MD_MAP_OPENDIR_ERROR(rc);
        return PR_FAILURE;
    }
    d->firstEntry = PR_TRUE;
    d->magic = _MD_MAGIC_DIR;
    return PR_SUCCESS;
}

char *
_PR_MD_READ_DIR(_MDDir *d, PRIntn flags)
{
    PRUword numFiles = 1;
    BOOL rv;
    char *fileName;
    USHORT fileAttr;

    if ( d ) {
       while (1) {
           if (d->firstEntry) {
               d->firstEntry = PR_FALSE;
               rv = NO_ERROR;
           } else {
               rv = DosFindNext(d->d_hdl,
                                &(d->d_entry),
                                sizeof(d->d_entry),
                                &numFiles);
           }
           if (rv != NO_ERROR) {
               break;
           }
           fileName = GetFileFromDIR(d);
           fileAttr = GetFileAttr(d);
           if ( (flags & PR_SKIP_DOT) &&
                (fileName[0] == '.') && (fileName[1] == '\0'))
                continue;
           if ( (flags & PR_SKIP_DOT_DOT) &&
                (fileName[0] == '.') && (fileName[1] == '.') &&
                (fileName[2] == '\0'))
                continue;
			/*
			 * XXX
			 * Is this the correct definition of a hidden file on OS/2?
			 */
           if ((flags & PR_SKIP_NONE) && (fileAttr & FILE_HIDDEN))
                return fileName;
           else if ((flags & PR_SKIP_HIDDEN) && (fileAttr & FILE_HIDDEN))
                continue;
           return fileName;
        }
        PR_ASSERT(NO_ERROR != rv);
			_PR_MD_MAP_READDIR_ERROR(rv);
        return NULL;
		}
    PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
    return NULL;
}

PRInt32
_PR_MD_DELETE(const char *name)
{
    PRInt32 rc = DosDelete((char*)name);
    if(rc == NO_ERROR) {
        return 0;
    } else {
		_PR_MD_MAP_DELETE_ERROR(rc);
        return -1;
    }
}

PRInt32
_PR_MD_STAT(const char *fn, struct stat *info)
{
    PRInt32 rv;
    char filename[CCHMAXPATH];

    PR_snprintf(filename, CCHMAXPATH, "%s", fn);
    FlipSlashes(filename, strlen(filename));

    rv = _stat((char*)filename, info);
    if (-1 == rv) {
        /*
         * Check for MSVC runtime library _stat() bug.
         * (It's really a bug in FindFirstFile().)
         * If a pathname ends in a backslash or slash,
         * e.g., c:\temp\ or c:/temp/, _stat() will fail.
         * Note: a pathname ending in a slash (e.g., c:/temp/)
         * can be handled by _stat() on NT but not on Win95.
         *
         * We remove the backslash or slash at the end and
         * try again.  
         *
         * Not sure if this happens on OS/2 or not,
         * but it doesn't hurt to be careful.
         */

        int len = strlen(fn);
        if (len > 0 && len <= _MAX_PATH
                && (fn[len - 1] == '\\' || fn[len - 1] == '/')) {
            char newfn[_MAX_PATH + 1];

            strcpy(newfn, fn);
            newfn[len - 1] = '\0';
            rv = _stat(newfn, info);
        }
    }

    if (-1 == rv) {
        _PR_MD_MAP_STAT_ERROR(errno);
    }
    return rv;
}

PRInt32
_PR_MD_GETFILEINFO(const char *fn, PRFileInfo *info)
{
    struct stat sb;
    PRInt32 rv;
    PRInt64 s, s2us;
 
    if ( (rv = _PR_MD_STAT(fn, &sb)) == 0 ) {
        if (info) {
            if (S_IFREG & sb.st_mode)
                info->type = PR_FILE_FILE ;
            else if (S_IFDIR & sb.st_mode)
                info->type = PR_FILE_DIRECTORY;
            else
                info->type = PR_FILE_OTHER;
            info->size = sb.st_size;
            LL_I2L(s2us, PR_USEC_PER_SEC);
            LL_I2L(s, sb.st_mtime);
            LL_MUL(s, s, s2us);
            info->modifyTime = s;
            LL_I2L(s, sb.st_ctime);
            LL_MUL(s, s, s2us);
            info->creationTime = s;
        }
    }
    return rv;
}

PRInt32
_PR_MD_GETFILEINFO64(const char *fn, PRFileInfo64 *info)
{
    PRFileInfo info32;
    PRInt32 rv = _PR_MD_GETFILEINFO(fn, &info32);
    if (0 == rv)
    {
        info->type = info32.type;
        LL_UI2L(info->size,info32.size);
        info->modifyTime = info32.modifyTime;
        info->creationTime = info32.creationTime;
    }
    return rv;
}

PRInt32
_PR_MD_GETOPENFILEINFO(const PRFileDesc *fd, PRFileInfo *info)
{
   /* For once, the VAC compiler/library did a nice thing.
    * The file handle used by the C runtime is the same one
    * returned by the OS when you call DosOpen().  This means
    * that you can take an OS HFILE and use it with C file
    * functions.  The only caveat is that you have to call
    * _setmode() first to initialize some junk.  This is
    * immensely useful because I did not have a clue how to
    * implement this function otherwise.  The windows folks
    * took the source from the Microsoft C library source, but
    * IBM wasn't kind enough to ship the source with VAC.
    * On second thought, the needed function could probably
    * be gotten from the OS/2 GNU library source, but the
    * point is now moot.
    */
   struct stat hinfo;
    PRInt64 s, s2us;

    _setmode(fd->secret->md.osfd, O_BINARY);
    if(fstat((int)fd->secret->md.osfd, &hinfo) != NO_ERROR) {
		_PR_MD_MAP_FSTAT_ERROR(errno);
        return -1;
	}

    if (hinfo.st_mode & S_IFDIR)
        info->type = PR_FILE_DIRECTORY;
    else
        info->type = PR_FILE_FILE;

    info->size = hinfo.st_size;
    LL_I2L(s2us, PR_USEC_PER_SEC);
    LL_I2L(s, hinfo.st_mtime);
    LL_MUL(s, s, s2us);
    info->modifyTime = s;
    LL_I2L(s, hinfo.st_ctime);
    LL_MUL(s, s, s2us);
    info->creationTime = s;

    return 0;
}

PRInt32
_PR_MD_GETOPENFILEINFO64(const PRFileDesc *fd, PRFileInfo64 *info)
{
   PRFileInfo info32;
   PRInt32 rv = _PR_MD_GETOPENFILEINFO(fd, &info32);
   if (0 == rv)
   {
       info->type = info32.type;
       LL_UI2L(info->size,info32.size);

       info->modifyTime = info32.modifyTime;
       info->creationTime = info32.creationTime;
   }
   return rv;
}


PRInt32
_PR_MD_RENAME(const char *from, const char *to)
{
   PRInt32 rc;
    /* Does this work with dot-relative pathnames? */
    if ( (rc = DosMove((char *)from, (char *)to)) == NO_ERROR) {
        return 0;
    } else {
		_PR_MD_MAP_RENAME_ERROR(rc);
        return -1;
    }
}

PRInt32
_PR_MD_ACCESS(const char *name, PRAccessHow how)
{
  PRInt32 rv;
    switch (how) {
      case PR_ACCESS_WRITE_OK:
        rv = access(name, 02);
		break;
      case PR_ACCESS_READ_OK:
        rv = access(name, 04);
		break;
      case PR_ACCESS_EXISTS:
        return access(name, 00);
	  	break;
      default:
		PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
		return -1;
    }
	if (rv < 0)
		_PR_MD_MAP_ACCESS_ERROR(errno);
    return rv;
}

PRInt32
_PR_MD_MKDIR(const char *name, PRIntn mode)
{
   PRInt32 rc;
    /* XXXMB - how to translate the "mode"??? */
    if ((rc = DosCreateDir((char *)name, NULL))== NO_ERROR) {
        return 0;
    } else {
		_PR_MD_MAP_MKDIR_ERROR(rc);
        return -1;
    }
}

PRInt32
_PR_MD_RMDIR(const char *name)
{
   PRInt32 rc;
    if ( (rc = DosDeleteDir((char *)name)) == NO_ERROR) {
        return 0;
    } else {
		_PR_MD_MAP_RMDIR_ERROR(rc);
        return -1;
    }
}

PRStatus
_PR_MD_LOCKFILE(PRInt32 f)
{
	PRInt32   rv;
   FILELOCK lock, unlock;

   lock.lOffset = 0;
   lock.lRange = 0xffffffff;
   unlock.lOffset = 0;
   unlock.lRange = 0;

	/*
     * loop trying to DosSetFileLocks(),
     * pause for a few miliseconds when can't get the lock
     * and try again
     */
    for( rv = FALSE; rv == FALSE; /* do nothing */ )
    {
    
	    rv = DosSetFileLocks( (HFILE) f,
			                    &unlock, &lock,
			                    0, 0); 
		if ( rv != NO_ERROR )
        {
            DosSleep( 50 );  /* Sleep() a few milisecs and try again. */
        }            
    } /* end for() */
    return PR_SUCCESS;
} /* end _PR_MD_LOCKFILE() */

PRStatus
_PR_MD_TLOCKFILE(PRInt32 f)
{
    return _PR_MD_LOCKFILE(f);
} /* end _PR_MD_TLOCKFILE() */


PRStatus
_PR_MD_UNLOCKFILE(PRInt32 f)
{
	PRInt32   rv;
   FILELOCK lock, unlock;

   lock.lOffset = 0;
   lock.lRange = 0;
   unlock.lOffset = 0;
   unlock.lRange = 0xffffffff;
    
   rv = DosSetFileLocks( (HFILE) f,
                          &unlock, &lock,
                          0, 0); 
            
    if ( rv != NO_ERROR )
    {
    	return PR_SUCCESS;
    }
    else
    {
		return PR_FAILURE;
    }
} /* end _PR_MD_UNLOCKFILE() */

PRStatus
_PR_MD_SET_FD_INHERITABLE(PRFileDesc *fd, PRBool inheritable)
{
    int rv = 0;
    ULONG flags;

    rv = DosQueryFHState((HFILE)fd->secret->md.osfd, &flags);
    if (rv != 0) {
        PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
        return PR_FAILURE;
    }

    if (inheritable)
      flags &= ~OPEN_FLAGS_NOINHERIT;
    else
      flags |= OPEN_FLAGS_NOINHERIT;

    rv = DosSetFHState((HFILE)fd->secret->md.osfd, flags);
    if (rv != 0) {
        PR_SetError(PR_UNKNOWN_ERROR, _MD_ERRNO());
        return PR_FAILURE;
    }
    return PR_SUCCESS;
}

void
_PR_MD_INIT_FD_INHERITABLE(PRFileDesc *fd, PRBool imported)
{
    /* XXX this function needs to be implemented */
    fd->secret->inheritable = _PR_TRI_UNKNOWN;
}

void
_PR_MD_QUERY_FD_INHERITABLE(PRFileDesc *fd)
{
    /* XXX this function needs to be reviewed */
    ULONG flags;

    PR_ASSERT(_PR_TRI_UNKNOWN == fd->secret->inheritable);
    if (DosQueryFHState((HFILE)fd->secret->md.osfd, &flags) == 0) {
        if (flags & OPEN_FLAGS_NOINHERIT) {
            fd->secret->inheritable = _PR_TRI_FALSE;
        } else {
            fd->secret->inheritable = _PR_TRI_TRUE;
        }
    }
}