general/4408: Improper error message returned by server when a remote file server is down.

[David Winkel <dw...@umich.edu>]

>Number:         4408
>Category:       general
>Synopsis:       Improper error message returned by server when a remote file server is down.
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Thu May 13 11:10:01 PDT 1999
>Last-Modified:
>Originator:     dwinkel@umich.edu
>Organization:
apache
>Release:        1.3.6
>Environment:
Solaris 2.6 Generic_1.5181-11
Sun cc
>Description:
When a remote file server goes down (in our case, an afs file server), the web 
server returns a "Forbidden" error, because it can't access a .htaccess file.
Since the error actually returned when attempting to read a .htaccess file is 
"ENODEV", it's possible to modify main/http_config.c to return 
"HTTP_SERVICE_UNAVAILABLE" instead of "HTTP_FORBIDDEN" in that case.  Could 
this change be incorporated into the distribution?
>How-To-Repeat:
Only happens when a file server is down.  (If I could predict those...)
>Fix:
% diff http_config.c-orig http_config.c
1256a1257,1266
>             if (errno == ENODEV) {
>                 ap_log_rerror(APLOG_MARK, APLOG_CRIT, r,
>                               "%s pcfg_openfile: unable to check htaccess "
>                               "file, device not found",
>                               filename);
>                 ap_table_setn(r->notes, "error-notes",
>                               "Server unable to read htaccess file, denying "
>                               "access to be safe");
>                 return HTTP_SERVICE_UNAVAILABLE;
>             }
>Audit-Trail:
>Unformatted:
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