EXEC_SCRIPT_MAGICLEN
for (cp = hdrstr + EXEC_SCRIPT_MAGICLEN; *cp == ' ' || *cp == '\t';
epp->ep_hdrvalid < EXEC_SCRIPT_MAGICLEN ||
strncmp(hdrstr, EXEC_SCRIPT_MAGIC, EXEC_SCRIPT_MAGICLEN))
for (cp = hdrstr + EXEC_SCRIPT_MAGICLEN; cp < hdrstr + hdrlinelen;
#define EXEC_SCRIPT_HDRSZ (EXEC_SCRIPT_MAGICLEN + 1 + MAXINTERP + 1)