[Crash-utility] [PATCH] fix for '/proc/version' check

[Michael Holzheu]

Hi Dave!

It can happen that crash does not extract the correct Linux version string
from vmlinux. Therefore the comparison with /proc/version fails at startup:

WARNING: /usr/lib/debug/lib/modules/2.6.17-1.2519.4.21.el5/vmlinux
         and /proc/version do not match!

Crash gets the release string by searching strings in vmlinux. Something
like:

>> strings vmlinux | grep "Linux version"
>`0Linux version 2.6.17-1.2519.4.21.el5 ...

On our system the string does not start with "Linux...", but with "0Linux...".
Therefore crash assumes a wrong version string. To fix this, we should skip the
leading "0":

---

diff o-Naur crash-4.0-3.3/filesys.c crash-4.0-3.3-proc-version-check-fix/filesys.c
--- crash-4.0-3.3/filesys.c	2006-09-07 21:00:08.000000000 +0200
+++ crash-4.0-3.3-proc-version-check-fix/filesys.c	2006-09-13 15:36:54.000000000 +0200
@@ -244,10 +244,12 @@
 
 	found = FALSE;
         while (fgets(buffer, BUFSIZE-1, pipe)) {
-		if (!strstr(buffer, "Linux version 2."))
+		char* ptr;
+		ptr = strstr(buffer, "Linux version 2.");
+		if (!ptr)
 			continue;
 
-                if (STREQ(buffer, kt->proc_version)) 
+                if (STREQ(ptr, kt->proc_version)) 
                 	found = TRUE;
 		break;
         }