Overpass API developpement

[Roland Olbricht <>]

Hi,

the whole thing has been broken down to:

> File error caught: 13 Permission denied 
/home/igor/overpass/db/nodes.bin.idx.shadow 
File_Blocks_Index::~File_Blocks_Index::1

This is the message that the process was denied to write the index file 
by the operating system.

The message has been obscured by the fact that the update tries 
desperately to write the index files. That results in a crash. Hence, 
there are two jobs here:
1. ensure that the error message gets through by refraining from writing 
urther index files (code change in Overpass API required)
2. figure out why in this specific situation the OS denies the file access

I have no idea why 2. happens. Note that the process already must have 
successfully written to files in that directory. Also, in the course of 
events, under the same user have already been created files in that 
directory.

Note that understanding 2. may help to make a good decision what to do 
when writing a file in that late stage fails. There are a whole bunch of 
weird situations (we may get even a file system error on close()) that 
may profit fro insight what is happening here.

Best regards,

Roland