How to remove errors in getmac program in C language?

Question

Please find below the code and the output which I am getting.

My C code is in c:/turboc3/bin directory and my output macid.txt is in c:/turboc3/disk .

Here is the code which I am compiling

#include <stdio.h>
#include <conio.h>
#include <string.h>

int main ()
{
    //char mac[200];
    FILE *fp;
    clrscr();
    // fp=fopen("c:\macid.txt","w");
    system("GETMAC>c:/macid.txt");
    fp=fopen("c:/macid.txt","r");
    if(fp!=NULL)
    {
        char line[128];
        while(fgets(line,sizeof line,fp)!=NULL)
        {
            char *nwln=strchr(line,'\n');
            char *ptr;
            if(nwln!=NULL)
                *nwln='\0';
            ptr=strstr(line,"Physical Address");
            if(ptr!=NULL)
            {
                printf("%s\n",ptr);
                break;
            }
        }
    }
    getch();
    return 0;
}

The output is:

Illegal command: GETMAC.

Can anyone guide me through this?

Answer 1

Illegal command: GETMAC implies, that it tries to run it but can't.

First, things to fix : Remember to escape \\ inside string. Do not use / as path separator.

Then, Things to try, in approximate order: Try with full path to GETMAC. Try without redirection. Try with different program. Wrap GETMAC into bat file, which does the redirection.

Answer 2

I am not sure how your file macid.txt resides in c:/turboc3/disk , but - I think you can solve this problem by giving a full path to the system() function call.

LIke this:

system("c:/windows/system32/getmac.exe > macid.txt");