commit fb9529161039e96d44b4b7396450cff04e3d9aa8
Author: Maynard Johnson <maynardj@us.ibm.com>
Date:   Tue Oct 15 14:58:16 2013 -0500

    Fix operf/ocount default unit mask selection
    
    Many events (particularly in the x86* architectures)
    require a unit mask value to specify the exact event
    type.  For such events, a default unit mask value
    is assigned.  When a user runs operf, ocount, or
    opcontrol and specifies such an event but does not
    specify a unit mask, the default unit mask should be
    selected and used by the tool.  A bug was discovered
    with operf and ocount where the unit mask value in
    this situation was being set to '0' instead of the
    default unit mask value.  This patch fixes the bug.
    
    Signed-off-by: Maynard Johnson <maynardj@us.ibm.com>

diff --git a/libpe_utils/op_pe_utils.cpp b/libpe_utils/op_pe_utils.cpp
index b85d175..177835e 100644
--- a/libpe_utils/op_pe_utils.cpp
+++ b/libpe_utils/op_pe_utils.cpp
@@ -484,7 +484,8 @@ handle_named_um:
 		pclose(fp);
 		event->evt_um = strtoull(mask, &endptr, 10);
 		if ((endptr >= mask) &&
-				(endptr <= (mask + strlen(mask) - 1))) {
+				(endptr <= (mask + strlen(mask) - 2))) { // '- 2' to account for linefeed and '\0'
+
 			// Must be a default named unit mask
 			strncpy(event->um_name, mask, OP_MAX_UM_NAME_LEN);
 			goto handle_named_um;