Daniel Stenberg wrote:

> On Tue, 27 Nov 2001, Dimitris Sarris wrote:
>
> > When I execute the above, it crashes at the first call of
> > "curl_easy_perform". I debugged with dbx and I found that it crashes
> > inside the "Curl_getaddrinfo", at line 831 of the "ftp.c" :
> >
> > 831: if(gethostbyaddr_r((char *) &address,
> > sizeof(address), AF_INET,
> > (struct hostent *)hostent_buf,
> > hostent_buf + sizeof(*answer)))
>
> Do you know why this particular code crashes? I can only think of one problem
> here:
>
> The 'address' variable is an "unsigned long" type while the man page says it
> should be using the in_addr_t type. In a 64 bit architecture, it might make a
> difference if the in_addr_t isn't a typedef'ed long.
>
> Could it be this?

Here it is a slightly changed persistant example (copied from your
repository)
_______________________________________________________________________________________________

#include <stdio.h>
#include <unistd.h>

#include <curl/curl.h>

/* to make this work under windows, use the win32-functions from the
   docs/examples/win32socket.c file as well */

/* This example REQUIRES libcurl 7.7 or later */
#if (LIBCURL_VERSION_NUM < 0x070700)
#error Too old libcurl version, upgrade or stay away.
#endif
/*
class TestWrapper {
 private:

  CURL* curl;
 public:
  TestWrapper() {
   curl = curl_easy_init();
   curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
  }
  ~TestWrapper() {
   curl_easy_cleanup(curl);
  }
  void GetFile() {
   FILE *ftpfile;
   CURLcode res;
   ftpfile = fopen("readme.txt", "wb");
   curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost/readme.txt");
     curl_easy_setopt(curl, CURLOPT_FILE, ftpfile);
     curl_easy_setopt(curl, CURLOPT_USERPWD, "dimitris:dimitris");
     res = curl_easy_perform(curl);
   fclose(ftpfile);
  }

  void GetList() {
   FILE *ftpls;
   CURLcode res;
   ftpls = fopen("ftpls.txt", "wb");
    curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost");
     curl_easy_setopt(curl, CURLOPT_FILE, ftpls);
   res = curl_easy_perform(curl);
   fclose(ftpls);
  }

};
*/
CURL* curl;
void Init() {
       curl = curl_easy_init();
      curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
}
void End() {
       curl_easy_cleanup(curl);
}
void GetFile() {
      FILE *ftpfile;
      CURLcode res;
      ftpfile = fopen("readme.txt", "wb");
      curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost/readme.txt");
      curl_easy_setopt(curl, CURLOPT_FILE, ftpfile);
      curl_easy_setopt(curl, CURLOPT_USERPWD, "dimitris:dimitris");
      res = curl_easy_perform(curl);
      //fclose(ftpfile);
    }
void GetList() {
      FILE *ftpls;
      CURLcode res;
      ftpls = fopen("ftpls.txt", "wb");
      curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost");
      curl_easy_setopt(curl, CURLOPT_FILE, ftpls);
      curl_easy_setopt(curl, CURLOPT_USERPWD, "dimitris:dimitris");
      res = curl_easy_perform(curl);
      // fclose(ftpls);
    }

int main(int argc, char **argv)
{
/* C++ mode
 TestWrapper test;

 test.GetFile();
 test.GetList();
*/
/* Procedural mode */
 Init();
 GetFile();
 GetList();
 End();
/* */
/* cURL example
  CURL *curl;
  CURLcode res;

 FILE *ftpfile, *ftpls;

  ftpfile = fopen("readme.txt", "wb");
  ftpls = fopen("ftpls.txt", "wb");

  curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
   curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost/readme.txt");
   curl_easy_setopt(curl, CURLOPT_FILE, ftpfile);
   curl_easy_setopt(curl, CURLOPT_USERPWD, "dimitris:dimitris");

    res = curl_easy_perform(curl);

   curl_easy_setopt(curl, CURLOPT_URL, "ftp://myhost");
   curl_easy_setopt(curl, CURLOPT_FILE, ftpls);

    res = curl_easy_perform(curl);

    curl_easy_cleanup(curl);
  }
  */
  return 0;
}
_______________________________________________________________________________________________

As you can see there are 3 different approaches:
    1. Your approach (all the code in the main procedure)
    2. Procedural approach (global curl instance, 4 procedures are doing
the
work)
    3. Object-oriented approach (Class TestWrapper is doing all the
work)

It has no problem running with the 1st approach (your example), but with
the
other 2 approaches crashes at the same position with my first example.
At the
first call to "curl_easy_perform".
I am running this example at a Digital Unix platform (Tru64 4.0D)

Have you compiled and tested my first example?
Can you compile and test all the 3 variants in order to see if it is a
platform
problem or a "curl" bug or my software bug?

Thanks,
Dimitris
Received on 2001-11-28