Completion of error handling

[elfring]

I have looked at a few source files for your current software. I have noticed that some checks for return codes are missing.

Would you like to add more error handling for return values from functions like the following?

• fclose ⇒ config_close
• fwrite ⇒ _status_out_msg
• signal ⇒ lwan_main_loop

[lpereira]

All reported spots have been fixed. Thank you.

[elfring]

How do you think about to reconsider also return values from a call of a function like "close"?

[lpereira]

There's nothing to do under Linux, except reporting it. Even handling EINTR is incorrect under Linux (might introduce a race condition).

[elfring]

Would you like to detect every error situation as early as possible?

How do you think about to care also for return values from a function like "pthreadmutex(un)lock"?