irritating character in output

RudraB · 08-01-2008, 12:34 PM

hello friends,
in a code i am trying to retrive the machine bit the code. The code
is:

Code:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
main(){
FILE *stream;
char sys[8],*sysptr;
int bit;
sysptr = &sys[0];
sys[6] = 0x0;
stream=popen("file /sbin/init|awk '{print $3}'|cut -c0-2","r");
fread(sysptr,1,2,stream);
pclose(stream);
printf("bit=%s",sysptr);
}

and the output is

Quote:

bit=32�

why the irritating symbol after 32 is coming? can you suggest me
something?

jiml8 · 08-01-2008, 12:53 PM

Well, counting for cut starts at one, so cut -c0-2 is an error. Change it to -c1-2.

Your problem is that you are not properly initiating the buffer sys. You are setting the seventh element to zero but the string you are reading is less than 7 characters long, so there is garbage in the buffer.

Replace your sys[6]=0x0 with memset(sys,0x0,8) and it will work.

RudraB · 08-01-2008, 01:12 PM

thnx jiml8,
its just what i was looking for!!