48 	u_char fsinfo[2 * DOSBOOTBLOCKSIZE];  in readboot()  local
132 		    || read(dosfs, fsinfo, sizeof fsinfo) != sizeof fsinfo) {  in readboot()
136 		if (memcmp(fsinfo, "RRaA", 4)  in readboot()
137 		    || memcmp(fsinfo + 0x1e4, "rrAa", 4)  in readboot()
138 		    || fsinfo[0x1fc]  in readboot()
139 		    || fsinfo[0x1fd]  in readboot()
140 		    || fsinfo[0x1fe] != 0x55  in readboot()
141 		    || fsinfo[0x1ff] != 0xaa  in readboot()
142 		    || fsinfo[0x3fc]  in readboot()
143 		    || fsinfo[0x3fd]  in readboot()
144 		    || fsinfo[0x3fe] != 0x55  in readboot()
145 		    || fsinfo[0x3ff] != 0xaa) {  in readboot()
148 				memcpy(fsinfo, "RRaA", 4);  in readboot()
149 				memcpy(fsinfo + 0x1e4, "rrAa", 4);  in readboot()
150 				fsinfo[0x1fc] = fsinfo[0x1fd] = 0;  in readboot()
151 				fsinfo[0x1fe] = 0x55;  in readboot()
152 				fsinfo[0x1ff] = 0xaa;  in readboot()
153 				fsinfo[0x3fc] = fsinfo[0x3fd] = 0;  in readboot()
154 				fsinfo[0x3fe] = 0x55;  in readboot()
155 				fsinfo[0x3ff] = 0xaa;  in readboot()
159 				    || write(dosfs, fsinfo, sizeof fsinfo)  in readboot()
160 				    != sizeof fsinfo) {  in readboot()
169 			boot->FSFree = fsinfo[0x1e8] + (fsinfo[0x1e9] << 8)  in readboot()
170 				       + (fsinfo[0x1ea] << 16)  in readboot()
171 				       + (fsinfo[0x1eb] << 24);  in readboot()
172 			boot->FSNext = fsinfo[0x1ec] + (fsinfo[0x1ed] << 8)  in readboot()
173 				       + (fsinfo[0x1ee] << 16)  in readboot()
174 				       + (fsinfo[0x1ef] << 24);  in readboot()
262 	u_char fsinfo[2 * DOSBOOTBLOCKSIZE];  in writefsinfo()  local
266 	    || read(dosfs, fsinfo, sizeof fsinfo) != sizeof fsinfo) {  in writefsinfo()
270 	fsinfo[0x1e8] = (u_char)boot->FSFree;  in writefsinfo()
271 	fsinfo[0x1e9] = (u_char)(boot->FSFree >> 8);  in writefsinfo()
272 	fsinfo[0x1ea] = (u_char)(boot->FSFree >> 16);  in writefsinfo()
273 	fsinfo[0x1eb] = (u_char)(boot->FSFree >> 24);  in writefsinfo()
274 	fsinfo[0x1ec] = (u_char)boot->FSNext;  in writefsinfo()
275 	fsinfo[0x1ed] = (u_char)(boot->FSNext >> 8);  in writefsinfo()
276 	fsinfo[0x1ee] = (u_char)(boot->FSNext >> 16);  in writefsinfo()
277 	fsinfo[0x1ef] = (u_char)(boot->FSNext >> 24);  in writefsinfo()
280 	    || write(dosfs, fsinfo, sizeof fsinfo)  in writefsinfo()
281 	    != sizeof fsinfo) {  in writefsinfo()