DragonFly On-Line Manual Pages
CURLOPT_NOSIGNAL(3) curl_easy_setopt options CURLOPT_NOSIGNAL(3)
CURLOPT_NOSIGNAL - skip all signal handling
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOSIGNAL, long onoff);
If onoff is 1, libcurl will not use any functions that install signal
handlers or any functions that cause signals to be sent to the process.
This option is here to allow multi-threaded unix applications to still
set/use all timeout options etc, without risking getting signals.
If this option is set and libcurl has been built with the standard name
resolver, timeouts will not occur while the name resolve takes place.
Consider building libcurl with the c-ares or threaded resolver backends
to enable asynchronous DNS lookups, to enable timeouts for name
resolves without the use of signals.
Setting CURLOPT_NOSIGNAL(3) to 1 makes libcurl NOT ask the system to
ignore SIGPIPE signals, which otherwise are sent by the system when
trying to send data to a socket which is closed in the other end.
libcurl makes an effort to never cause such SIGPIPEs to trigger, but
some operating systems have no way to avoid them and even on those that
have there are some corner cases when they may still happen, contrary
to our desire. In addition, using CURLAUTH_NTLM_WB authentication could
cause a SIGCHLD signal to be raised.
Added in 7.10
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
libcurl 7.76.0 November 4, 2020 CURLOPT_NOSIGNAL(3)