CURLOPT_FNMATCH_FUNCTION(3) - Man pages

CURLOPT_FNMATCH_FUNCTION(3) Library Functions ManualCURLOPT_FNMATCH_FUNCTION(3)

NAME
       CURLOPT_FNMATCH_FUNCTION - wildcard match callback

SYNOPSIS
       #include <curl/curl.h>

       int fnmatch_callback(void *ptr,
                            const char *pattern,
                            const char *string);

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_FNMATCH_FUNCTION,
                                 fnmatch_callback);

DESCRIPTION
       Pass  a pointer to your callback function, which should match the proto-
       type shown above.

       This callback is used for wildcard matching.

       Return CURL_FNMATCHFUNC_MATCH if pattern matches  the  string,  CURL_FN-
       MATCHFUNC_NOMATCH if not or CURL_FNMATCHFUNC_FAIL if an error occurred.

DEFAULT
       NULL == an internal function for wildcard matching.

PROTOCOLS
       This functionality affects ftp only

EXAMPLE
       extern int string_match(const char *s1, const char *s2);

       struct local_stuff {
         void *custom;
       };
       static int my_fnmatch(void *clientp,
                             const char *pattern, const char *string)
       {
         struct local_stuff *data = clientp;
         printf("my pointer: %p\n", data->custom);
         if(string_match(pattern, string))
           return CURL_FNMATCHFUNC_MATCH;
         else
           return CURL_FNMATCHFUNC_NOMATCH;
       }

       int main(void)
       {
         struct local_stuff local_data;
         CURL *curl = curl_easy_init();
         if(curl) {
           curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/file*");
           curl_easy_setopt(curl, CURLOPT_WILDCARDMATCH, 1L);
           curl_easy_setopt(curl, CURLOPT_FNMATCH_FUNCTION, my_fnmatch);
           curl_easy_setopt(curl, CURLOPT_FNMATCH_DATA, &local_data);
           curl_easy_perform(curl);
         }
       }

AVAILABILITY
       Added in curl 7.21.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK  (0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_DEBUGFUNCTION(3),   CURLOPT_FNMATCH_DATA(3),   CURLOPT_WILDCARD-
       MATCH(3)

libcurl                            2026-07-12       CURLOPT_FNMATCH_FUNCTION(3)

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