src/tests/append-over-page.c

   1 /*
   2  * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <errno.h>
  42
  43 #include <sys/types.h>
  44 #include <sys/stat.h>
  45 #include <sys/mman.h>
  46 #include <fcntl.h>
  47 #include <unistd.h>
  48 #include <dirent.h>
  49
  50
  51 #include <err.h>
  52
  53 #ifndef MAP_FAILED
  54 #define MAP_FAILED ((void *)-1)
  55 #endif
  56
  57 static char long_buf[] =
  58     "1000\n" "1001\n" "1002\n" "1003\n" "1004\n" "1005\n" "1006\n" "1007\n"
  59     "1008\n" "1009\n" "1010\n" "1011\n" "1012\n" "1013\n" "1014\n" "1015\n"
  60     "1016\n" "1017\n" "1018\n" "1019\n" "1020\n" "1021\n" "1022\n" "1023\n"
  61     "1024\n" "1025\n" "1026\n" "1027\n" "1028\n" "1029\n" "1030\n" "1031\n"
  62     "1032\n" "1033\n" "1034\n" "1035\n" "1036\n" "1037\n" "1038\n" "1039\n"
  63     "1040\n" "1041\n" "1042\n" "1043\n" "1044\n" "1045\n" "1046\n" "1047\n"
  64     "1048\n" "1049\n" "1050\n" "1051\n" "1052\n" "1053\n" "1054\n" "1055\n"
  65     "1056\n" "1057\n" "1058\n" "1059\n" "1060\n" "1061\n" "1062\n" "1063\n"
  66     "1064\n" "1065\n" "1066\n" "1067\n" "1068\n" "1069\n" "1070\n" "1071\n"
  67     "1072\n" "1073\n" "1074\n" "1075\n" "1076\n" "1077\n" "1078\n" "1079\n"
  68     "1080\n" "1081\n" "1082\n" "1083\n" "1084\n" "1085\n" "1086\n" "1087\n"
  69     "1088\n" "1089\n" "1090\n" "1091\n" "1092\n" "1093\n" "1094\n" "1095\n"
  70     "1096\n" "1097\n" "1098\n" "1099\n" "1100\n" "1101\n" "1102\n" "1103\n"
  71     "1104\n" "1105\n" "1106\n" "1107\n" "1108\n" "1109\n" "1110\n" "1111\n"
  72     "1112\n" "1113\n" "1114\n" "1115\n" "1116\n" "1117\n" "1118\n" "1119\n"
  73     "1120\n" "1121\n" "1122\n" "1123\n" "1124\n" "1125\n" "1126\n" "1127\n"
  74     "1128\n" "1129\n" "1130\n" "1131\n" "1132\n" "1133\n" "1134\n" "1135\n"
  75     "1136\n" "1137\n" "1138\n" "1139\n" "1140\n" "1141\n" "1142\n" "1143\n"
  76     "1144\n" "1145\n" "1146\n" "1147\n" "1148\n" "1149\n" "1150\n" "1151\n"
  77     "1152\n" "1153\n" "1154\n" "1155\n" "1156\n" "1157\n" "1158\n" "1159\n"
  78     "1160\n" "1161\n" "1162\n" "1163\n" "1164\n" "1165\n" "1166\n" "1167\n"
  79     "1168\n" "1169\n" "1170\n" "1171\n" "1172\n" "1173\n" "1174\n" "1175\n"
  80     "1176\n" "1177\n" "1178\n" "1179\n" "1180\n" "1181\n" "1182\n" "1183\n"
  81     "1184\n" "1185\n" "1186\n" "1187\n" "1188\n" "1189\n" "1190\n" "1191\n"
  82     "1192\n" "1193\n" "1194\n" "1195\n" "1196\n" "1197\n" "1198\n" "1199\n"
  83     "1200\n" "1201\n" "1202\n" "1203\n" "1204\n" "1205\n" "1206\n" "1207\n"
  84     "1208\n" "1209\n" "1210\n" "1211\n" "1212\n" "1213\n" "1214\n" "1215\n"
  85     "1216\n" "1217\n" "1218\n" "1219\n" "1220\n" "1221\n" "1222\n" "1223\n"
  86     "1224\n" "1225\n" "1226\n" "1227\n" "1228\n" "1229\n" "1230\n" "1231\n"
  87     "1232\n" "1233\n" "1234\n" "1235\n" "1236\n" "1237\n" "1238\n" "1239\n"
  88     "1240\n" "1241\n" "1242\n" "1243\n" "1244\n" "1245\n" "1246\n" "1247\n"
  89     "1248\n" "1249\n" "1250\n" "1251\n" "1252\n" "1253\n" "1254\n" "1255\n"
  90     "1256\n" "1257\n" "1258\n" "1259\n" "1260\n" "1261\n" "1262\n" "1263\n"
  91     "1264\n" "1265\n" "1266\n" "1267\n" "1268\n" "1269\n" "1270\n" "1271\n"
  92     "1272\n" "1273\n" "1274\n" "1275\n" "1276\n" "1277\n" "1278\n" "1279\n"
  93     "1280\n" "1281\n" "1282\n" "1283\n" "1284\n" "1285\n" "1286\n" "1287\n"
  94     "1288\n" "1289\n" "1290\n" "1291\n" "1292\n" "1293\n" "1294\n" "1295\n"
  95     "1296\n" "1297\n" "1298\n" "1299\n" "1300\n" "1301\n" "1302\n" "1303\n"
  96     "1304\n" "1305\n" "1306\n" "1307\n" "1308\n" "1309\n" "1310\n" "1311\n"
  97     "1312\n" "1313\n" "1314\n" "1315\n" "1316\n" "1317\n" "1318\n" "1319\n"
  98     "1320\n" "1321\n" "1322\n" "1323\n" "1324\n" "1325\n" "1326\n" "1327\n"
  99     "1328\n" "1329\n" "1330\n" "1331\n" "1332\n" "1333\n" "1334\n" "1335\n"
 100     "1336\n" "1337\n" "1338\n" "1339\n" "1340\n" "1341\n" "1342\n" "1343\n"
 101     "1344\n" "1345\n" "1346\n" "1347\n" "1348\n" "1349\n" "1350\n" "1351\n"
 102     "1352\n" "1353\n" "1354\n" "1355\n" "1356\n" "1357\n" "1358\n" "1359\n"
 103     "1360\n" "1361\n" "1362\n" "1363\n" "1364\n" "1365\n" "1366\n" "1367\n"
 104     "1368\n" "1369\n" "1370\n" "1371\n" "1372\n" "1373\n" "1374\n" "1375\n"
 105     "1376\n" "1377\n" "1378\n" "1379\n" "1380\n" "1381\n" "1382\n" "1383\n"
 106     "1384\n" "1385\n" "1386\n" "1387\n" "1388\n" "1389\n" "1390\n" "1391\n"
 107     "1392\n" "1393\n" "1394\n" "1395\n" "1396\n" "1397\n" "1398\n" "1399\n"
 108     "1400\n" "1401\n" "1402\n" "1403\n" "1404\n" "1405\n" "1406\n" "1407\n"
 109     "1408\n" "1409\n" "1410\n" "1411\n" "1412\n" "1413\n" "1414\n" "1415\n"
 110     "1416\n" "1417\n" "1418\n" "1419\n" "1420\n" "1421\n" "1422\n" "1423\n"
 111     "1424\n" "1425\n" "1426\n" "1427\n" "1428\n" "1429\n" "1430\n" "1431\n"
 112     "1432\n" "1433\n" "1434\n" "1435\n" "1436\n" "1437\n" "1438\n" "1439\n"
 113     "1440\n" "1441\n" "1442\n" "1443\n" "1444\n" "1445\n" "1446\n" "1447\n"
 114     "1448\n" "1449\n" "1450\n" "1451\n" "1452\n" "1453\n" "1454\n" "1455\n"
 115     "1456\n" "1457\n" "1458\n" "1459\n" "1460\n" "1461\n" "1462\n" "1463\n"
 116     "1464\n" "1465\n" "1466\n" "1467\n" "1468\n" "1469\n" "1470\n" "1471\n"
 117     "1472\n" "1473\n" "1474\n" "1475\n" "1476\n" "1477\n" "1478\n" "1479\n"
 118     "1480\n" "1481\n" "1482\n" "1483\n" "1484\n" "1485\n" "1486\n" "1487\n"
 119     "1488\n" "1489\n" "1490\n" "1491\n" "1492\n" "1493\n" "1494\n" "1495\n"
 120     "1496\n" "1497\n" "1498\n" "1499\n" "1500\n" "1501\n" "1502\n" "1503\n"
 121     "1504\n" "1505\n" "1506\n" "1507\n" "1508\n" "1509\n" "1510\n" "1511\n"
 122     "1512\n" "1513\n" "1514\n" "1515\n" "1516\n" "1517\n" "1518\n" "1519\n"
 123     "1520\n" "1521\n" "1522\n" "1523\n" "1524\n" "1525\n" "1526\n" "1527\n"
 124     "1528\n" "1529\n" "1530\n" "1531\n" "1532\n" "1533\n" "1534\n" "1535\n"
 125     "1536\n" "1537\n" "1538\n" "1539\n" "1540\n" "1541\n" "1542\n" "1543\n"
 126     "1544\n" "1545\n" "1546\n" "1547\n" "1548\n" "1549\n" "1550\n" "1551\n"
 127     "1552\n" "1553\n" "1554\n" "1555\n" "1556\n" "1557\n" "1558\n" "1559\n"
 128     "1560\n" "1561\n" "1562\n" "1563\n" "1564\n" "1565\n" "1566\n" "1567\n"
 129     "1568\n" "1569\n" "1570\n" "1571\n" "1572\n" "1573\n" "1574\n" "1575\n"
 130     "1576\n" "1577\n" "1578\n" "1579\n" "1580\n" "1581\n" "1582\n" "1583\n"
 131     "1584\n" "1585\n" "1586\n" "1587\n" "1588\n" "1589\n" "1590\n" "1591\n"
 132     "1592\n" "1593\n" "1594\n" "1595\n" "1596\n" "1597\n" "1598\n" "1599\n"
 133     "1600\n" "1601\n" "1602\n" "1603\n" "1604\n" "1605\n" "1606\n" "1607\n"
 134     "1608\n" "1609\n" "1610\n" "1611\n" "1612\n" "1613\n" "1614\n" "1615\n"
 135     "1616\n" "1617\n" "1618\n" "1619\n" "1620\n" "1621\n" "1622\n" "1623\n"
 136     "1624\n" "1625\n" "1626\n" "1627\n" "1628\n" "1629\n" "1630\n" "1631\n"
 137     "1632\n" "1633\n" "1634\n" "1635\n" "1636\n" "1637\n" "1638\n" "1639\n"
 138     "1640\n" "1641\n" "1642\n" "1643\n" "1644\n" "1645\n" "1646\n" "1647\n"
 139     "1648\n" "1649\n" "1650\n" "1651\n" "1652\n" "1653\n" "1654\n" "1655\n"
 140     "1656\n" "1657\n" "1658\n" "1659\n" "1660\n" "1661\n" "1662\n" "1663\n"
 141     "1664\n" "1665\n" "1666\n" "1667\n" "1668\n" "1669\n" "1670\n" "1671\n"
 142     "1672\n" "1673\n" "1674\n" "1675\n" "1676\n" "1677\n" "1678\n" "1679\n"
 143     "1680\n" "1681\n" "1682\n" "1683\n" "1684\n" "1685\n" "1686\n" "1687\n"
 144     "1688\n" "1689\n" "1690\n" "1691\n" "1692\n" "1693\n" "1694\n" "1695\n"
 145     "1696\n" "1697\n" "1698\n" "1699\n" "1700\n" "1701\n" "1702\n" "1703\n"
 146     "1704\n" "1705\n" "1706\n" "1707\n" "1708\n" "1709\n" "1710\n" "1711\n"
 147     "1712\n" "1713\n" "1714\n" "1715\n" "1716\n" "1717\n" "1718\n" "1719\n"
 148     "1720\n" "1721\n" "1722\n" "1723\n" "1724\n" "1725\n" "1726\n" "1727\n"
 149     "1728\n" "1729\n" "1730\n" "1731\n" "1732\n" "1733\n" "1734\n" "1735\n"
 150     "1736\n" "1737\n" "1738\n" "1739\n" "1740\n" "1741\n" "1742\n" "1743\n"
 151     "1744\n" "1745\n" "1746\n" "1747\n" "1748\n" "1749\n" "1750\n" "1751\n"
 152     "1752\n" "1753\n" "1754\n" "1755\n" "1756\n" "1757\n" "1758\n" "1759\n"
 153     "1760\n" "1761\n" "1762\n" "1763\n" "1764\n" "1765\n" "1766\n" "1767\n"
 154     "1768\n" "1769\n" "1770\n" "1771\n" "1772\n" "1773\n" "1774\n" "1775\n"
 155     "1776\n" "1777\n" "1778\n" "1779\n" "1780\n" "1781\n" "1782\n" "1783\n"
 156     "1784\n" "1785\n" "1786\n" "1787\n" "1788\n" "1789\n" "1790\n" "1791\n"
 157     "1792\n" "1793\n" "1794\n" "1795\n" "1796\n" "1797\n" "1798\n" "1799\n"
 158     "1800\n" "1801\n" "1802\n" "1803\n" "1804\n" "1805\n" "1806\n" "1807\n"
 159     "1808\n" "1809\n" "1810\n" "1811\n" "1812\n" "1813\n" "1814\n" "1815\n"
 160     "1816\n" "1817\n" "1818\n" "1819\n" "1820\n" "1821\n" "1822\n" "1823\n"
 161     "1824\n" "1825\n" "1826\n";
 162
 163 /*
 164  * compare this file with read and mmap.
 165  * return 0 iff identical.
 166  */
 167
 168 static int
 169 compare_file(const char *filename)
 170 {
 171     struct stat sb;
 172     int fd;
 173     int ret;
 174     void *read_buf;
 175     void *mmap_buf;
 176
 177     fd = open(filename, O_RDONLY);
 178     if (fd < 0)
 179         err(1, "open %s", filename);
 180     ret = fstat(fd, &sb);
 181     if (ret < 0)
 182         err(1, "stat %s", filename);
 183     read_buf = malloc(sb.st_size);
 184     if (read_buf == NULL)
 185         err(1, "malloc %u", (unsigned)sb.st_size);
 186     ret = read(fd, read_buf, sb.st_size);
 187     if (ret < 0)
 188         err(1, "read %s", filename);
 189     if (ret != sb.st_size)
 190         errx(1, "short read from %s", filename);
 191     mmap_buf = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
 192     if (mmap_buf == (void *)MAP_FAILED)
 193         err(1, "mmap %s", filename);
 194     ret = memcmp(read_buf, mmap_buf, sb.st_size);
 195     close(fd);
 196     free(read_buf);
 197     return ret;
 198 }
 199
 200 static void
 201 doit(const char *filename)
 202 {
 203     int fd;
 204     int ret;
 205
 206     fd = open(filename, O_WRONLY | O_APPEND | O_CREAT | O_TRUNC, 0600);
 207     if (fd < 0)
 208         err(1, "open %s", filename);
 209     ret = close(fd);
 210     if (ret < 0)
 211         err(1, "close %s", filename);
 212     fd = open(filename, O_WRONLY | O_APPEND);
 213     if (fd < 0)
 214         err(1, "open %s", filename);
 215     ret = write(fd, "foobar\n", 7);
 216     if (ret < 0)
 217         err(1, "write %s", filename);
 218     if (ret != 7)
 219         errx(1, "short write to %s", filename);
 220     ret = close(fd);
 221     if (ret < 0)
 222         err(1, "close %s", filename);
 223
 224     if (compare_file(filename))
 225         errx(1, "compare 1 failed");
 226
 227     fd = open(filename, O_WRONLY | O_APPEND);
 228     if (fd < 0)
 229         err(1, "open %s", filename);
 230     ret = write(fd, long_buf, strlen(long_buf));
 231     if (ret < 0)
 232         err(1, "write %s", filename);
 233     if (ret != strlen(long_buf))
 234         errx(1, "short write to %s", filename);
 235     ret = close(fd);
 236     if (ret < 0)
 237         err(1, "close %s", filename);
 238
 239     if (compare_file(filename))
 240         errx(1, "compare 2 failed");
 241 }
 242
 243 int
 244 main(int argc, char **argv)
 245 {
 246     const char *file = "blaha";
 247
 248     if (argc != 1 && argc != 2)
 249         errx(1, "usage: %s [file]", argv[0]);
 250     if (argc == 2)
 251         file = argv[1];
 252     doit(file);
 253     return 0;
 254 }