strcat causing segmentation fault?

I am having a wierd issue. I am doing a simple strcat and getting a segmentation fault. Here is a code snippet.

Code:

---

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

                sname="/";
        printf("2 %s  &  %s\n",sname, name);
        strcat(sname, name);

---

This produces:
2 / & rb123121
Segmentation fault (core dumped)

Any ideas why this would happen? I have string.h included.

________________

Ok, after playing some more, it seems to be occuring with any string functions. I have all the right libraries included don't I?

String constants are in read only memory.

char *s = "hello"; // this is read only (or at least is allowed to be, and is in your case).

You need a real array of char, or some malloc'ed memory to strcat with

char s[100] = "hello";
strcat( s, " world" );

That did it. Thanks a lot!