Fix issue in bootlogd which could cause the service to enter an endle…

…ss loop

(and use too much CPU) when it is able to open a device for writing, but not actually
able to write to it. This resulted in bootlogd closing and re-opening the device over
and over. Now bootlogd should simply fail gracefully when it cannot write to an open
file/device.

doc/Changelog

@@ -5,6 +5,13 @@ sysvinit (3.10) unreleased; urgency=low
        SysV init now catches this signal and initiates a shutdown (shutdown -hP now).
        - floppym provided patch to accomplish this.
 
+    * Fix issue in bootlogd which could cause the service to enter an endless loop
+      (and use too much CPU) when it is able to open a device for writing, but not actually
+      able to write to it. This resulted in bootlogd closing and re-opening the device over
+      and over. Now bootlogd should simply fail gracefully when it cannot write to an open
+      file/device.
+
+    * Fix formatting in shutdown.8 manual page. Cleaned up whitespace and special characters.
 
 
 sysvinit (3.09) released; urgency=low

src/bootlogd.c

@@ -550,6 +550,7 @@ int main(int argc, char **argv)
 #ifndef __linux__	/* BSD-style ioctl needs an argument. */
 	int		on = 1;
 #endif
+        int             prev_eio = 0;
 	int		considx;
 	struct real_cons cons[MAX_CONSOLES];
 	int		num_consoles, consoles_left;
@@ -728,8 +729,15 @@ int main(int argc, char **argv)
 						if (i >= 0) {
 							m -= i;
 							p += i;
+                                                        prev_eio = 0;
 							continue;
 						}
+                                                /* Don't try to write the same data
+                                                 * again if we got EIO twice */
+                                                if ( (errno == EIO) && (prev_eio) ) {
+                                                      m = 0;
+                                                }
+                                                prev_eio = (errno == EIO);
 						/*
 						 *	Handle EIO (somebody hung
 						 *	up our filedescriptor)