CURLOPT_NOSIGNAL - skip all signal handling
#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOSIGNAL, long onoff);
CURLOPT_NOSIGNAL(3) curl_easy_setopt options CURLOPT_NOSIGNAL(3)
NAME
CURLOPT_NOSIGNAL - skip all signal handling
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOSIGNAL, long onoff);
DESCRIPTION
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.
DEFAULT
0
PROTOCOLS
All
EXAMPLE
CURL *curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
ret = curl_easy_perform(curl);
curl_easy_cleanup(curl);
}
AVAILABILITY
Added in 7.10
RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION
if not.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLOPT_TIMEOUT(3),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021 CURLOPT_NOSIGNAL(3)