Segmentation fault around strcpy?

Question

I know that you will rap me over the knuckles but.

Why does it make Segmentation fault

char* cmd;
strcpy(cmd, argv[0]);

when this d

Answer 1

If you want to make copy of argv[0] easily,

char* cmd = strdup(argv[0]);

Of course, you have better to check result of strdup is null or not. :)