substr
!strcmp(sys_vendor, dsi->matches[i].substr))
!strcmp(board_vendor, dsi->matches[i].substr))
!strcmp(product_name, dsi->matches[i].substr))
!strcmp(board_name, dsi->matches[i].substr))
char substr[79];
if ((tmp = substr(p, "rsize=")))
if ((tmp = substr(p, "wsize=")))
if ((tmp = substr(p, "intr")))
if ((tmp = substr(p, "soft")))
if ((tmp = substr(p, "noconn")))
if ((tmp = substr(p, "udp")))
static char *substr(char *a,char *b);