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CURLOPT_TIMEOUT(3) Library Functions Manual CURLOPT_TIMEOUT(3) NAME CURLOPT_TIMEOUT - maximum time the transfer is allowed to complete SYNOPSIS #include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMEOUT, long timeout); DESCRIPTION Pass a long as parameter containing timeout - the maximum time in sec- onds that you allow the entire transfer operation to take. The whole thing, from start to end. Normally, name lookups can take a consider- able time and limiting operations risk aborting perfectly normal opera- tions. CURLOPT_TIMEOUT_MS(3) is the same function but set in milliseconds. If both CURLOPT_TIMEOUT(3) and CURLOPT_TIMEOUT_MS(3) are set, the value set last is used. Since this option puts a hard limit on how long time a request is al- lowed to take, it has limited use in dynamic use cases with varying transfer times. That is especially apparent when using the multi inter- face, which may queue the transfer, and that time is included. You are advised to explore CURLOPT_LOW_SPEED_LIMIT(3), CUR- LOPT_LOW_SPEED_TIME(3) or using CURLOPT_PROGRESSFUNCTION(3) to imple- ment your own timeout logic. The connection timeout set with CURLOPT_CONNECTTIMEOUT(3) is included in this general all-covering timeout. With CURLOPT_CONNECTTIMEOUT(3) set to 3 and CURLOPT_TIMEOUT(3) set to 5, the operation can never last longer than 5 seconds. With CURLOPT_CONNECTTIMEOUT(3) set to 4 and CURLOPT_TIMEOUT(3) set to 2, the operation can never last longer than 2 seconds. This option may cause libcurl to use the SIGALRM signal to timeout sys- tem calls on builds not using asynch DNS. In Unix-like systems, this might cause signals to be used unless CURLOPT_NOSIGNAL(3) is set. DEFAULT 0 (zero) which means it never times out during transfer. PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { CURL *curl = curl_easy_init(); if(curl) { curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); /* complete within 20 seconds */ curl_easy_setopt(curl, CURLOPT_TIMEOUT, 20L); curl_easy_perform(curl); } } AVAILABILITY Added in curl 7.1 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_CONNECTTIMEOUT(3), CURLOPT_LOW_SPEED_LIMIT(3), CUR- LOPT_TCP_KEEPALIVE(3), CURLOPT_TIMEOUT_MS(3) libcurl 2025-06-03 CURLOPT_TIMEOUT(3)
NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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