Need help about Segmentation fault

I can run this code in Linux PC. but after cross compilation and run it in ARM target board, i met Segmentation fault. I used GDB to check the traceback, but couldn't get the actual source line number.
How can i solve the segmentation fault.
Below is my operation:
1. cross compilation:

arm-linux-gcc -g -o test test.c

2. copy test to target
3. run

./test
Segmentation fault

4. debug

Program received signal SIGSEGV, Segmentation fault.
Cannot access memory at address 0x6e7a6974

5. source code

#include<stdio.h>
int main(void)
{
  char lg[64];
  char cmd[64]="1.1.1.1";
  sprintf(lg,"sed -i 's/2.2.2.2/%s/' /mnt/jffs2/ddns_var/named/gotowiznet.com.dns ",cmd);
  system (lg);
  return 0;
}

Hi -

Change "system(lg)" to "printf ("strlen (lg): %d\n", strlen (lg));"

... and you'll see the string happens to be 73+1 bytes (exceeding the 64 bytes you've allocated).

'Hope that helps .. PSM

Originally Posted by paulsm4 Hi - Change "system(lg)" to "printf ("strlen (lg): %d\n", strlen (lg));" ... and you'll see the string happens to be 73+1 bytes (exceeding the 64 bytes you've allocated). 'Hope that helps .. PSM

Thanks! PSM