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 libcurl may store human readable error messages 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.

       Do  not  rely on the contents of the buffer unless an error code was returned.  Since 7.60.0 libcurl will
       initialize the contents of the error buffer to an  empty  string  before  performing  the  transfer.  For
       earlier  versions  if  an  error  code  was  returned  but  there  was no error detail then the buffer is
       untouched.

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

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)