-#define ISUID 04000 /* set user id on execution */
-#define ISGID 02000 /* set group id on execution */
-#define ISVTX 01000 /* save swapped text even after use */
-#define IREAD 0400 /* read, write, execute permissions */
-#define IWRITE 0200
-#define IEXEC 0100
+#define ISUID 04000 /* set user identifier when exec'ing */
+#define ISGID 02000 /* set group identifier when exec'ing */
+#define ISVTX 01000 /* save execution information on exit */
+#define IREAD 0400 /* read permission */
+#define IWRITE 0200 /* write permission */
+#define IEXEC 0100 /* execute permission */