system.c

samba-3.0.22.tar.gz 编译smb服务器的源码

		}
		size -= total_size;
	}
	return total_size;
}

#endif

#if defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
static char attr_buffer[ATTR_MAX_VALUELEN];

static ssize_t irix_attr_list(const char *path, int filedes, char *list, size_t size, int flags)
{
	int retval = 0, index;
	attrlist_cursor_t *cursor = 0;
	int total_size = 0;
	attrlist_t * al = (attrlist_t *)attr_buffer;
	attrlist_ent_t *ae;
	size_t ent_size, left = size;
	char *bp = list;

	while (True) {
	    if (filedes)
		retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
	    else
		retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
	    if (retval) break;
	    for (index = 0; index < al->al_count; index++) {
		ae = ATTR_ENTRY(attr_buffer, index);
		ent_size = strlen(ae->a_name) + sizeof("user.");
		if (left >= ent_size) {
		    strncpy(bp, "user.", sizeof("user."));
		    strncat(bp, ae->a_name, ent_size - sizeof("user."));
		    bp += ent_size;
		    left -= ent_size;
		} else if (size) {
		    errno = ERANGE;
		    retval = -1;
		    break;
		}
		total_size += ent_size;
	    }
	    if (al->al_more == 0) break;
	}
	if (retval == 0) {
	    flags |= ATTR_ROOT;
	    cursor = 0;
	    while (True) {
		if (filedes)
		    retval = attr_listf(filedes, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
		else
		    retval = attr_list(path, attr_buffer, ATTR_MAX_VALUELEN, flags, cursor);
		if (retval) break;
		for (index = 0; index < al->al_count; index++) {
		    ae = ATTR_ENTRY(attr_buffer, index);
		    ent_size = strlen(ae->a_name) + sizeof("system.");
		    if (left >= ent_size) {
			strncpy(bp, "system.", sizeof("system."));
			strncat(bp, ae->a_name, ent_size - sizeof("system."));
			bp += ent_size;
			left -= ent_size;
		    } else if (size) {
			errno = ERANGE;
			retval = -1;
			break;
		    }
		    total_size += ent_size;
		}
		if (al->al_more == 0) break;
	    }
	}
	return (ssize_t)(retval ? retval : total_size);
}

#endif

ssize_t sys_listxattr (const char *path, char *list, size_t size)
{
#if defined(HAVE_LISTXATTR)
	return listxattr(path, list, size);
#elif defined(HAVE_EXTATTR_LIST_FILE)
	extattr_arg arg;
	arg.path = path;
	return bsd_attr_list(0, arg, list, size);
#elif defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
	return irix_attr_list(path, 0, list, size, 0);
#else
	errno = ENOSYS;
	return -1;
#endif
}

ssize_t sys_llistxattr (const char *path, char *list, size_t size)
{
#if defined(HAVE_LLISTXATTR)
	return llistxattr(path, list, size);
#elif defined(HAVE_EXTATTR_LIST_LINK)
	extattr_arg arg;
	arg.path = path;
	return bsd_attr_list(1, arg, list, size);
#elif defined(HAVE_ATTR_LIST) && defined(HAVE_SYS_ATTRIBUTES_H)
	return irix_attr_list(path, 0, list, size, ATTR_DONTFOLLOW);
#else
	errno = ENOSYS;
	return -1;
#endif
}

ssize_t sys_flistxattr (int filedes, char *list, size_t size)
{
#if defined(HAVE_FLISTXATTR)
	return flistxattr(filedes, list, size);
#elif defined(HAVE_EXTATTR_LIST_FD)
	extattr_arg arg;
	arg.filedes = filedes;
	return bsd_attr_list(2, arg, list, size);
#elif defined(HAVE_ATTR_LISTF)
	return irix_attr_list(NULL, filedes, list, size, 0);
#else
	errno = ENOSYS;
	return -1;
#endif
}

int sys_removexattr (const char *path, const char *name)
{
#if defined(HAVE_REMOVEXATTR)
	return removexattr(path, name);
#elif defined(HAVE_EXTATTR_DELETE_FILE)
	char *s;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;

	return extattr_delete_file(path, attrnamespace, attrname);
#elif defined(HAVE_ATTR_REMOVE)
	int flags = 0;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;

	return attr_remove(path, attrname, flags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

int sys_lremovexattr (const char *path, const char *name)
{
#if defined(HAVE_LREMOVEXATTR)
	return lremovexattr(path, name);
#elif defined(HAVE_EXTATTR_DELETE_LINK)
	char *s;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;

	return extattr_delete_link(path, attrnamespace, attrname);
#elif defined(HAVE_ATTR_REMOVE)
	int flags = ATTR_DONTFOLLOW;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;

	return attr_remove(path, attrname, flags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

int sys_fremovexattr (int filedes, const char *name)
{
#if defined(HAVE_FREMOVEXATTR)
	return fremovexattr(filedes, name);
#elif defined(HAVE_EXTATTR_DELETE_FD)
	char *s;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;

	return extattr_delete_fd(filedes, attrnamespace, attrname);
#elif defined(HAVE_ATTR_REMOVEF)
	int flags = 0;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) flags |= ATTR_ROOT;

	return attr_removef(filedes, attrname, flags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

#if !defined(HAVE_SETXATTR)
#define XATTR_CREATE  0x1       /* set value, fail if attr already exists */
#define XATTR_REPLACE 0x2       /* set value, fail if attr does not exist */
#endif

int sys_setxattr (const char *path, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_SETXATTR)
	return setxattr(path, name, value, size, flags);
#elif defined(HAVE_EXTATTR_SET_FILE)
	char *s;
	int retval = 0;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;
	if (flags) {
		/* Check attribute existence */
		retval = extattr_get_file(path, attrnamespace, attrname, NULL, 0);
		if (retval < 0) {
			/* REPLACE attribute, that doesn't exist */
			if (flags & XATTR_REPLACE && errno == ENOATTR) {
				errno = ENOATTR;
				return -1;
			}
			/* Ignore other errors */
		}
		else {
			/* CREATE attribute, that already exists */
			if (flags & XATTR_CREATE) {
				errno = EEXIST;
				return -1;
			}
		}
	}
	retval = extattr_set_file(path, attrnamespace, attrname, value, size);
	return (retval < 0) ? -1 : 0;
#elif defined(HAVE_ATTR_SET)
	int myflags = 0;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
	if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
	if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;

	return attr_set(path, attrname, (const char *)value, size, myflags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

int sys_lsetxattr (const char *path, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_LSETXATTR)
	return lsetxattr(path, name, value, size, flags);
#elif defined(HAVE_EXTATTR_SET_LINK)
	char *s;
	int retval = 0;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;
	if (flags) {
		/* Check attribute existence */
		retval = extattr_get_link(path, attrnamespace, attrname, NULL, 0);
		if (retval < 0) {
			/* REPLACE attribute, that doesn't exist */
			if (flags & XATTR_REPLACE && errno == ENOATTR) {
				errno = ENOATTR;
				return -1;
			}
			/* Ignore other errors */
		}
		else {
			/* CREATE attribute, that already exists */
			if (flags & XATTR_CREATE) {
				errno = EEXIST;
				return -1;
			}
		}
	}

	retval = extattr_set_link(path, attrnamespace, attrname, value, size);
	return (retval < 0) ? -1 : 0;
#elif defined(HAVE_ATTR_SET)
	int myflags = ATTR_DONTFOLLOW;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
	if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
	if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;

	return attr_set(path, attrname, (const char *)value, size, myflags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

int sys_fsetxattr (int filedes, const char *name, const void *value, size_t size, int flags)
{
#if defined(HAVE_FSETXATTR)
	return fsetxattr(filedes, name, value, size, flags);
#elif defined(HAVE_EXTATTR_SET_FD)
	char *s;
	int retval = 0;
	int attrnamespace = (strncmp(name, "system", 6) == 0) ? 
		EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER;
	const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1;
	if (flags) {
		/* Check attribute existence */
		retval = extattr_get_fd(filedes, attrnamespace, attrname, NULL, 0);
		if (retval < 0) {
			/* REPLACE attribute, that doesn't exist */
			if (flags & XATTR_REPLACE && errno == ENOATTR) {
				errno = ENOATTR;
				return -1;
			}
			/* Ignore other errors */
		}
		else {
			/* CREATE attribute, that already exists */
			if (flags & XATTR_CREATE) {
				errno = EEXIST;
				return -1;
			}
		}
	}
	retval = extattr_set_fd(filedes, attrnamespace, attrname, value, size);
	return (retval < 0) ? -1 : 0;
#elif defined(HAVE_ATTR_SETF)
	int myflags = 0;
	char *attrname = strchr(name,'.') + 1;
	
	if (strncmp(name, "system", 6) == 0) myflags |= ATTR_ROOT;
	if (flags & XATTR_CREATE) myflags |= ATTR_CREATE;
	if (flags & XATTR_REPLACE) myflags |= ATTR_REPLACE;

	return attr_setf(filedes, attrname, (const char *)value, size, myflags);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/****************************************************************************
 Return the major devicenumber for UNIX extensions.
****************************************************************************/
                                                                                                                
uint32 unix_dev_major(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MAJOR_FN)
        return (uint32)major(dev);
#else
        return (uint32)(dev >> 8);
#endif
}
                                                                                                                
/****************************************************************************
 Return the minor devicenumber for UNIX extensions.
****************************************************************************/
                                                                                                                
uint32 unix_dev_minor(SMB_DEV_T dev)
{
#if defined(HAVE_DEVICE_MINOR_FN)
        return (uint32)minor(dev);
#else
        return (uint32)(dev & 0xff);
#endif
}

#if defined(WITH_AIO)

/*******************************************************************
 An aio_read wrapper that will deal with 64-bit sizes.
********************************************************************/
                                                                                                                                           
int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_READ64)
        return aio_read64(aiocb);
#elif defined(HAVE_AIO_READ)
        return aio_read(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_write wrapper that will deal with 64-bit sizes.
********************************************************************/
                                                                                                                                           
int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_WRITE64)
        return aio_write64(aiocb);
#elif defined(HAVE_AIO_WRITE)
        return aio_write(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_return wrapper that will deal with 64-bit sizes.
********************************************************************/
                                                                                                                                           
ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_RETURN64)
        return aio_return64(aiocb);
#elif defined(HAVE_AIO_RETURN)
        return aio_return(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_cancel wrapper that will deal with 64-bit sizes.
********************************************************************/

int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_CANCEL64)
        return aio_cancel64(fd, aiocb);
#elif defined(HAVE_AIO_CANCEL)
        return aio_cancel(fd, aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_error wrapper that will deal with 64-bit sizes.
********************************************************************/

int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_ERROR64)
        return aio_error64(aiocb);
#elif defined(HAVE_AIO_ERROR)
        return aio_error(aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_fsync wrapper that will deal with 64-bit sizes.
********************************************************************/

int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_FSYNC64)
        return aio_fsync64(op, aiocb);
#elif defined(HAVE_AIO_FSYNC)
        return aio_fsync(op, aiocb);
#else
	errno = ENOSYS;
	return -1;
#endif
}

/*******************************************************************
 An aio_fsync wrapper that will deal with 64-bit sizes.
********************************************************************/

int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
{
#if defined(HAVE_EXPLICIT_LARGEFILE_SUPPORT) && defined(HAVE_AIOCB64) && defined(HAVE_AIO_SUSPEND64)
        return aio_suspend64(cblist, n, timeout);
#elif defined(HAVE_AIO_FSYNC)
        return aio_suspend(cblist, n, timeout);
#else
	errno = ENOSYS;
	return -1;
#endif
}
#else /* !WITH_AIO */

int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
{
	errno = ENOSYS;
	return -1;
}

int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
{
	errno = ENOSYS;
	return -1;
}
#endif /* WITH_AIO */