Hi
 
I use libcurl to invoke a web service using the HTTP/POST method for
sending input and receiving the results from the web service.
 
I move my application from a i386-redhat-linux-gnu server using libcurl
7.12 to a x86_64-redhat-linux-gnu server using libcurl version 7.15 and
have been getting segfault in curl functions after a while (Takes some
time). My application is multithread. I followed all the recomendations
for multithread applications but it seems that adding the option
CURLOPT_NOSIGNAL have solved the problem but I am not sure why. Does
that make sense??
 
Thank you in advance
Marc Perreault
 
Here is an extract from my code:
 
        curl = curl_easy_init();
 
        // initalize custom header list (stating that Expect:
100-continue is not wanted
        //
        headerlist = curl_slist_append(headerlist, buf);
 
        if(curl) {
          // what URL that receives this POST
          curl_easy_setopt(curl, CURLOPT_URL, service_name);
          curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
          curl_easy_setopt(curl, CURLOPT_POST, 1);
          curl_easy_setopt(curl, CURLOPT_TIMEOUT, 100);
          curl_easy_setopt(curl, CURLOPT_POSTFIELDS, NULL);
          curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE,
file_info.st_size);
          curl_easy_setopt(curl, CURLOPT_READFUNCTION, read_callback);
          /* now specify which file to upload */
          curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
 
          curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
 
          /* send all data to this function */
          curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
 
          /* open the files */
          headerfile = fopen(headerfilename,"w");
          if (headerfile == NULL) {
            cout << "Unable to open " << headerfilename << endl;
            curl_easy_cleanup(curl);
            return -1;
          }
          bodyfile = fopen(bodyfilename,"w");
          if (bodyfile == NULL) {
            cout << "Unable to open " << bodyfilename << endl;
            curl_easy_cleanup(curl);
            return -1;
          }
 
          // we want the headers to this file handle
          curl_easy_setopt(curl, CURLOPT_WRITEHEADER, headerfile);
 
          // we want the body to this file handle
          curl_easy_setopt(curl, CURLOPT_WRITEDATA, bodyfile);
 
          res = curl_easy_perform(curl);

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Received on 2010-01-12