You can create, modify, and delete objects and attributes, as shown in the following table:
| If you want to: | Do this: |
|---|---|
| Create a new object | Create a file with the name of the object. The new object will come into existence with no attributes. You can then write attributes to the object, as required. |
| Delete an object | Delete the object file. |
| Create a new attribute | Write the attribute to the object file. |
| Modify an attribute | Write the new attribute value to the object file. Note that there's no need to lseek() to the attribute's position in the file first; seeking has no meaning in PPS. |
| Delete all existing attributes | Open the object with O_TRUNC. |
| Delete one attribute | Prefix its name with a minus sign, then call write(). For
example:
// Delete the "url" attribute sprintf( ppsobj, "-url\n" ); write( ppsobj-fd, ppsobj, strlen( ppsobj ) ); |