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| .\" * Project ___| | | | _ \| | |
| .\" * / __| | | | |_) | | |
| .\" * | (__| |_| | _ <| |___ |
| .\" * \___|\___/|_| \_\_____| |
| .\" * |
| .\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. |
| .\" * |
| .\" * This software is licensed as described in the file COPYING, which |
| .\" * you should have received as part of this distribution. The terms |
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| .\" |
| .TH CURLOPT_NOSIGNAL 3 "16 Jun 2014" libcurl libcurl |
| .SH NAME |
| CURLOPT_NOSIGNAL \- skip all signal handling |
| .SH SYNOPSIS |
| .nf |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOSIGNAL, long onoff); |
| .fi |
| .SH DESCRIPTION |
| If \fIonoff\fP is 1, libcurl uses no 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 cannot 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 SIGPIPE signals 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 PROTOCOLS |
| All |
| .SH EXAMPLE |
| .nf |
| int main(void) |
| { |
| CURL *curl = curl_easy_init(); |
| if(curl) { |
| CURLcode res; |
| curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/"); |
| |
| curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L); |
| |
| res = curl_easy_perform(curl); |
| |
| curl_easy_cleanup(curl); |
| } |
| } |
| .fi |
| .SH AVAILABILITY |
| Added in 7.10 |
| .SH RETURN VALUE |
| Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. |
| .SH SEE ALSO |
| .BR CURLOPT_TIMEOUT "(3), " |