CURLOPT_ERRORBUFFER - error buffer for error messages
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_ERRORBUFFER, char *buf);
CURLOPT_ERRORBUFFER(3) curl_easy_setopt options CURLOPT_ERRORBUFFER(3)
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
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLOPT_DEBUGFUNCTION(3), CURLOPT_VERBOSE(3), curl_easy_strerror(3),
curl_multi_strerror(3), curl_share_strerror(3), curl_url_strerror(3)
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021 CURLOPT_ERRORBUFFER(3)