NAME

       CURLOPT_ERRORBUFFER - 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 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, "https://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), curl_url_strerror(3)