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- .TH CURLOPT_NOSIGNAL 3 "February 03, 2016" "libcurl 7.61.1" "curl_easy_setopt options"
- .SH NAME
- CURLOPT_NOSIGNAL \- skip all signal handling
- .SH SYNOPSIS
- #include <curl/curl.h>
- CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOSIGNAL, long onoff);
- .SH DESCRIPTION
- If \fIonoff\fP 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 \fICURLOPT_NOSIGNAL(3)\fP 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
- \fICURLAUTH_NTLM_WB\fP authentication could cause a SIGCHLD signal to be
- raised.
- .SH DEFAULT
- 0
- .SH AVAILABILITY
- Added in 7.10
- .SH RETURN VALUE
- Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
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