[PATCH V2] mkdumprd: fix patterns to modify mount options

[Dave Young]

mkdumprd removes "noauto" mount option, but it also mistakenly removes
"noauto" within a string. For example ext4 has mount option noauto_da_alloc
mkdumprd will replace it with _da_alloc.

Use '\b' to match a whole word of "noauto" to fix it.
Also do same for s/ro/rw for same reason.

Signed-off-by: Dave Young <dyoung(a)redhat.com&gt;
---
 mkdumprd |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- kexec-tools.orig/mkdumprd
+++ kexec-tools/mkdumprd
@@ -101,8 +101,9 @@ to_mount() {
     [ -z "$_options" ] && _options=$(findmnt -k -f -n -r -o OPTIONS
$_dev)
     # with 'noauto' in fstab nfs and non-root disk mount will fail in 2nd
     # kernel, filter it out here.
-    _options=$(echo $_options | sed 's/noauto//')
-    _options=${_options/#ro/rw} #mount fs target as rw in 2nd kernel
+    _options=$(echo $_options | sed 's/\bnoauto\b//')
+    #mount fs target as rw in 2nd kernel
+    _options=$(echo $_options | sed 's/\bro\b/rw/')
 
     _mntopts="$_target $_fstype $_options"
     #for non-nfs _dev converting to use udev persistent name