curl_multi_strerror(3) libcurl Manual curl_multi_strerror(3)NAME
curl_multi_strerror - return string describing error code
SYNOPSIS
#include <curl/curl.h>
const char *curl_multi_strerror(CURLMcode errornum);
DESCRIPTION
The curl_multi_strerror() function returns a string describing the CURLMcode error code passed in the argument errornum.
AVAILABILITY
This function was added in libcurl 7.12.0
RETURN VALUE
A pointer to a zero terminated string.
SEE ALSO libcurl-errors(3), curl_easy_strerror(3), curl_share_strerror(3)libcurl 7.12 26 Apr 2004 curl_multi_strerror(3)
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CURLOPT_ERRORBUFFER(3) curl_easy_setopt options CURLOPT_ERRORBUFFER(3)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, "
libcurl: (%d) ", res);
if(len)
fprintf(stderr, "%s%s", errbuf,
((errbuf[len - 1] != '
') ? "
" : ""));
else
fprintf(stderr, "%s
", 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 7.54.0 February 03, 2016 CURLOPT_ERRORBUFFER(3)
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