dbeaver/dbeaver-ee#521 add escaping to cron entry params

bundles/org.jkiss.utils/src/org/jkiss/utils/CommonUtils.java

@@ -801,4 +801,15 @@ public class CommonUtils {
             cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) &&
             cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR));
     }
+
+    public static String escapeBourneShellString(@NotNull String s) {
+        return "'" + s.replace("'", "'\\''") + "'";
+    }
+
+    public static String unescapeBourneShellString(@NotNull String s) {
+        if (!s.startsWith("'") || !s.endsWith("'") || s.length() < 2) { //not an escaped bourne shell string
+            return s;
+        }
+        return s.substring(1, s.length() - 1).replace("'\\''", "'");
+    }
 }

test/org.jkiss.dbeaver.test.platform/src/org/jkiss/utils/CommonUtilsTest.java

@@ -522,4 +522,29 @@ public class CommonUtilsTest {
   public void testgetSingleLineString() {
     Assert.assertEquals("a¶bc d ", CommonUtils.getSingleLineString("a\nb\rc\td\0"));
   }
+
+  @Test
+  public void testEscapeStringForBourneShell() {
+    Assert.assertEquals("''", CommonUtils.escapeBourneShellString(""));
+    Assert.assertEquals("'string'", CommonUtils.escapeBourneShellString("string"));
+    Assert.assertEquals("'string with '\\''one single quote symbol'", CommonUtils.escapeBourneShellString("string with 'one single quote symbol"));
+    Assert.assertEquals("'string with '\\''two '\\''single quote symbols'", CommonUtils.escapeBourneShellString("string with 'two 'single quote symbols"));
+    Assert.assertEquals("'string with '\\''three '\\''single '\\''quote symbols'", CommonUtils.escapeBourneShellString("string with 'three 'single 'quote symbols"));
+    Assert.assertEquals("''\\'''", CommonUtils.escapeBourneShellString("'"));
+    Assert.assertEquals("'unit'\\'''\\''test'", CommonUtils.escapeBourneShellString("unit''test"));
+    Assert.assertEquals("'unit'\\'''\\'''\\''test'", CommonUtils.escapeBourneShellString("unit'''test"));
+  }
+
+  @Test
+  public void testUnescapeStringForBourneShell() {
+    Assert.assertEquals("", CommonUtils.unescapeBourneShellString("''"));
+    Assert.assertEquals("string", CommonUtils.unescapeBourneShellString("'string'"));
+    Assert.assertEquals("string with 'one single quote symbol", CommonUtils.unescapeBourneShellString("'string with '\\''one single quote symbol'"));
+    Assert.assertEquals("string with 'two 'single quote symbols", CommonUtils.unescapeBourneShellString("'string with '\\''two '\\''single quote symbols'"));
+    Assert.assertEquals("string with 'three 'single 'quote symbols", CommonUtils.unescapeBourneShellString("'string with '\\''three '\\''single '\\''quote symbols'"));
+    Assert.assertEquals("'", CommonUtils.unescapeBourneShellString("''\\'''"));
+    Assert.assertEquals("unit''test", CommonUtils.unescapeBourneShellString("'unit'\\'''\\''test'"));
+    Assert.assertEquals("unit'''test", CommonUtils.unescapeBourneShellString("'unit'\\'''\\'''\\''test'"));
+    Assert.assertEquals("'''unit'''test'''", CommonUtils.unescapeBourneShellString("''\\'''\\'''\\''unit'\\'''\\'''\\''test'\\'''\\'''\\'''"));
+  }
 }