Hi to all.
I receive the following segmentation fault when I try to send more
different files simultaneously (via sftp):

(gdb) where
#0 0x0000000000000000 in ?? ()
#1 0x0000003992a1e883 in ?? () from /usr/lib64/libssh2.so.1
#2 0x0000003992a1c7b9 in ?? () from /usr/lib64/libssh2.so.1
#3 0x0000003992a0591a in ?? () from /usr/lib64/libssh2.so.1
#4 0x0000003992a16475 in libssh2_sftp_write () from /usr/lib64/libssh2.so.1
#5 0x000000306923b4e3 in Curl_sftp_send () from /usr/lib64/libcurl.so.4
#6 0x0000003069217a65 in Curl_write () from /usr/lib64/libcurl.so.4
#7 0x000000306922b1c7 in Curl_readwrite () from /usr/lib64/libcurl.so.4
#8 0x000000306922bca8 in Curl_perform () from /usr/lib64/libcurl.so.4
#9 0x00007fe54eefe825 in my::company::curl::Curl::performTransfer(bool,
std::basic_string<char, std::char_traits<char>, std::allocator<char> >,
std::basic_string<char, std::char_traits<char>, std::allocator<char> >,
void*) () from /raid0/pdgs/shared/libFtpCurl.so.1.35
...

I noticed that, when I use OpenSSL and cURL in a multithreaded
environment, I must define the callback void lock_function(..) and void
unlock_function(..) in order to avoid problems like this.
Is it correct?

How can I use these two callbacks?

Thanks.
Michele

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Received on 2011-08-10