On 06/20/2012 06:17 PM, oh...@cox.net wrote:
>
> Hi Ben and Daniel,
>
> I must be doing wrong. After I added code to strip the begin and end lines,
> I get a segfault when I test.
>
> I notice that the apr_cpystrn() doesn't include a pool parameter, so I guess
> it's just moving the char strings in memory that already exists in the pool?
>
> Here's the code I have thus far:
>
> const char * ssl_client_cert;
> const char * ssl_client_cert_after_remove_begin;
> const char * ssl_client_cert_after_remove_end;
> int end_of_cert;
>
> printf("SSL_CLIENT_CERT=[%s]\n", apr_table_get(r->subprocess_env,
> "SSL_CLIENT_CERT"));
> ssl_client_cert = apr_table_get(r->subprocess_env, "SSL_CLIENT_CERT");
>
> printf("printf ssl_client_cert=[%s]\n", ssl_client_cert);
> printf("ssl_client_cert + 27=[%s]\n", ssl_client_cert+27);
>
> // SEGFAULT after here...
>
> end_of_cert = strlen(ssl_client_cert);
> apr_cpystrn(ssl_client_cert_after_remove_begin, ssl_client_cert+27,
> end_of_cert-27 );
> end_of_cert = strlen(ssl_client_cert);
>
> printf("printf ssl_client_cert_after_remove_begin=[%d]-[%s]\n",
> end_of_cert, ssl_client_cert_after_remove_begin);
> end_of_cert = strlen(ssl_client_cert_after_remove_begin);
> apr_cpystrn(ssl_client_cert_after_remove_end,
> ssl_client_cert_after_remove_begin+21, end_of_cert-21);
>
> printf("printf ssl_client_cert_after_remove_end=[%d]-[%s]\n",
> end_of_cert, ssl_client_cert_after_remove_end);
>
> Thanks,
> Jim
>
>
apr_cpystrn expects the destination to be already allocated space of the
correct size.
You need to either allocate the space for your char* yourself via
apr_palloc or apr_pcalloc, or use apr_pstrndup instead, if you expect
httpd to handle the memory management.
With regards,
Daniel.
