NAME

       CURLOPT_ERRORBUFFER - set error buffer for error messages

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ERRORBUFFER, char *buf);

DESCRIPTION

       Pass  a  char  *  to  a buffer that the libcurl may store human readable error messages in on failures or
       problems. This may be more helpful than just  the  return  code  from  curl_easy_perform(3)  and  related
       functions. The buffer must be at least CURL_ERROR_SIZE bytes big.

       You  must  keep  the  associated buffer available until libcurl no longer needs it. Failing to do so will
       cause very odd behavior or even crashes. libcurl will need it until you call curl_easy_cleanup(3) or  you
       set the same option again to use a different pointer.

       Consider CURLOPT_VERBOSE(3) and CURLOPT_DEBUGFUNCTION(3) to better debug and trace why errors happen.

       If  the  library  does  not  return  an  error,  the buffer may not have been touched. Do not rely on the
       contents in those cases.

DEFAULT

       NULL

PROTOCOLS

       All

EXAMPLE

       curl = curl_easy_init();
       if(curl) {
         CURLcode res;
         char errbuf[CURL_ERROR_SIZE];

         curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");

         /* provide a buffer to store errors in */
         curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errbuf);

         /* set the error buffer as empty before performing a request */
         errbuf[0] = 0;

         /* perform the request */
         res = curl_easy_perform(curl);

         /* if the request did not complete correctly, show the error
         information. if no detailed error information was written to errbuf
         show the more generic information from curl_easy_strerror instead.
         */
         if(res != CURLE_OK) {
           size_t len = strlen(errbuf);
           fprintf(stderr, "\nlibcurl: (%d) ", res);
           if(len)
             fprintf(stderr, "%s%s", errbuf,
                     ((errbuf[len - 1] != '\n') ? "\n" : ""));
           else
             fprintf(stderr, "%s\n", curl_easy_strerror(res));
         }
       }

AVAILABILITY

       Always

RETURN VALUE

       Returns CURLE_OK

SEE ALSO

       CURLOPT_DEBUGFUNCTION(3),     CURLOPT_VERBOSE(3),     curl_easy_strerror(3),      curl_multi_strerror(3),
       curl_share_strerror(3)

libcurl 7.37.0                                     17 Jun 2014                            CURLOPT_ERRORBUFFER(3)