Tweaks.

less.h

@@ -338,6 +338,7 @@ typedef short POLL_EVENTS;
 
 #define EOI (-1)
 
+#define READ_ERR (-1)
 #define READ_INTR (-2)
 #define READ_AGAIN (-3)
 

lesstest/README

@@ -13,18 +13,21 @@ of the simulated screen.
  +------------------+ (tty) +------+ (outfd) +-------------+
  | lesstest |--------------->| less |--------------->| lt_screen |
  +------------------+ simulated +------+ simulated +-------------+
- ^  ^  user terminal
- | |
- |  |
+ ^ (stdin) | ^ user terminal
+ | | |
+ | v | (testfile)
  +-----------+ +---------+
  | developer | | LT file |
  +-----------+ +---------+
 
-lesstest runs in one of two modes: in the "maketest" mode it reads single
-keystrokes from the developer and sends them to less. After each keystroke 
-it then reads the lt_screen screen contents and logs the keystroke and
-the resulting screen contents to a log file, called an lt file. 
-In "runtest" mode, lesstest reads an lt file and "replays" the session;
-that is, it reads a keystroke from the lt file and sends it to less.
-After sending each keystroke, it reads the lt_screen screen contents and 
-compares it to the logged screen contents from the lt file.
+lesstest runs in one of two modes: 
+
+In the "maketest" mode it reads single keystrokes from the developer 
+and sends them to less. After each keystroke it then reads the 
+lt_screen screen contents and logs the keystroke and the resulting 
+screen contents to a log file, called an lt file. 
+
+In the "runtest" mode, lesstest reads a previously-created lt file 
+and "replays" the session; that is, it first reads a keystroke from 
+the lt file and sends it to less. It then reads the lt_screen screen 
+contents and compares it to the logged screen contents from the lt file.

os.c

@@ -198,7 +198,7 @@ iread(fd, buf, len)
  if (select(fd+1, &readfds, 0, 0, 0) == -1)
  {
  reading = 0;
- return (-1);
+ return (READ_ERR);
  }
  }
 #endif
@@ -262,7 +262,7 @@ iread(fd, buf, len)
  goto start;
 #endif
 #endif
- return (-1);
+ return (READ_ERR);
  }
  return (n);
 }