For(;;) { write(t parse(void) { char *p; /* pointer to current word */ char *msg; /* error message */ nwds = 0; p = strtok(line," \t"); while (p != NULL) { if (nwds == NWORDS) { msg = "*** ERROR: Too many words.\n"; write(2,msg, strlen(msg)); return 0; } if (strlen(p) >= MAXWORDLEN) { msg = "*** ERROR: Word too long.\n"; write(2,msg, strlen(msg)); return 0; } strcpy(words[nwds],p); nwds++; p = strtok(NULL," \t"); } return 1; }1,"# ",2); gotnb = len = 0; for(;;) { n = read(0,&c,1); if (n == 0) /* end of file? */ return 0; if (n == -1) { perror("Error reading command line"); exit(1); } if (!isatty(0)) write (1,&c,1); /* echo the character */ if (c == '\n') /* end of line? */ break; if (len >= MAXLINELEN) { /* too many chars? */ len++; continue; } if (c != ' ' && c != '\t') gotnb = 1; line[len++] = c; } if (len >= MAX