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curl_slist_append(3) Library Functions Manual curl_slist_append(3) NAME curl_slist_append - add a string to an slist SYNOPSIS #include <curl/curl.h> struct curl_slist *curl_slist_append(struct curl_slist *list, const char *string); DESCRIPTION curl_slist_append(3) appends a string to a linked list of strings. The existing list should be passed as the first argument and the new list is returned from this function. Pass in NULL in the list argument to create a new list. The specified string has been appended when this function returns. curl_slist_append(3) copies the string. The string argument must be a valid string pointer and cannot be NULL. The list should be freed again (after usage) with curl_slist_free_all(3). PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *handle = curl_easy_init(); struct curl_slist *slist = NULL; struct curl_slist *temp = NULL; slist = curl_slist_append(slist, "pragma:"); if(!slist) return -1; temp = curl_slist_append(slist, "Accept:"); if(!temp) { curl_slist_free_all(slist); return -1; } slist = temp; curl_easy_setopt(handle, CURLOPT_HTTPHEADER, slist); curl_easy_perform(handle); curl_slist_free_all(slist); /* free the list again */ } AVAILABILITY Added in curl 7.1 RETURN VALUE A null pointer is returned if anything went wrong, otherwise the new list pointer is returned. To avoid overwriting an existing non-empty list on failure, the new list should be returned to a temporary vari- able which can be tested for NULL before updating the original list pointer. SEE ALSO curl_slist_free_all(3) libcurl 2026-02-26 curl_slist_append(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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