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gcc-gethostbyaddr memory leak
- To: help-gcc at gnu dot org
- Subject: gcc-gethostbyaddr memory leak
- From: aaa at bbb dot ccc dot ddd (Andrew Wallace)
- Date: 9 Dec 1999 23:37:01 GMT
- Newsgroups: gnu.gcc.help
- Organization: Phoneware Systems Pty Ltd
- Xref: wodc7nx0 gnu.gcc.help:2139
I hope this is the correct list, this looks like a gcc problem. I don't think
it's a programming question.
The following code leaks when it is passed an address that it cannot find. If
anybody has any suggestions I would appreciate any help.
Thanks,
Andrew
System info:
gcc version 2.95.1 19990816
Linux Redhat v6.0, I'm sorry I can't find the kernel version
// simple program to demo the leak in gethostbyaddr when a
// name is not found
#include <netdb.h>
#include <sys/socket.h>
#include <errno.h>
#include <netinet/in.h>
#include <arpa/inet.h>
char* GetAddrName(char* clean_address)
{
static int init_state;
struct in_addr ip;
if (inet_aton(clean_address, &ip))
{
struct hostent* hostinfo = gethostbyaddr((char*)&ip, sizeof(ip), AF_INET);
if (hostinfo)
return hostinfo->h_name;
if (h_errno != 1) // display anything but HOST NOT FOUND
printf("ERROR: gethostbyaddr (%s,%d)(%s,%d)(%s)\n",
hstrerror(h_errno), h_errno, strerror(errno), errno, clean_address);
} // if
else
printf("ERROR: address seems invalid: %s\n", clean_address);
return NULL;
}
int main(int argc, char** argv)
{
int x;
char buff[124];
for (x = 0; x < 50000; x++)
{
sprintf(buff,"%d.%d.%d.%d",210,10,3, (random()%254) + 1);
printf("%-20.20s %s\n", GetAddrName(buff), buff);
if (!(x % 100))
sleep(1);
}
}