[kexec-tools] get_ssh_size fix for localized df output

[WANG Chao]

commit fc1749219f708e762fcf3b12300d7f954a7778ab
Author: Dave Young <dyoung at redhat.com>
Date:   Thu Mar 13 14:09:15 2014 +0800

    get_ssh_size fix for localized df output
    
    When kdump service is started, /sbin/mkdump checks if there is enough
    free space on the ssh server using "df -P" command.
    However, the slight difference in the first line of the "df -P" command
    output for English and Japanese environment causes a problem.
     -----
      # LANG=en_us.utf8 df -P | head -1
      Filesystem 1024-blocks Used Available Capacity Mount on
      # LANG=ja_JP.utf8 df -P | head -1
      ファイルシス   1024-ブロック    使用  使用可 容量 マウント位置
     -----
    Because the number of words is 7 in the English output and 6 in
    Japanese, the subsequent awk command could not correctly locate the
    free space field and results in an error.
    
    One way to fix it is use df -P /var/crash|tail -1, but for remote restricted
    shell pipe is not supported. Thus fix this by print field NF-2 in awk script.
    
    Signed-off-by: Dave Young <dyoung at redhat.com>
    Acked-by: WANG Chao <chaowang at redhat.com>
    Acked-by: Vivek Goyal <vgoyal at redhat.com>

 mkdumprd |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/mkdumprd b/mkdumprd
index 241a426..bb1e01e 100644
--- a/mkdumprd
+++ b/mkdumprd
@@ -142,8 +142,9 @@ get_ssh_size() {
     [ $? -ne 0 ] && {
         perror_exit "checking remote ssh server available size failed."
     }
-    #ssh output removed the line break, so print $11 instead of $4
-    _size=$(echo -n $_out|tail -1 | awk '{print $11}')
+
+    #ssh output removed the line break, so print field NF-2
+    _size=$(echo -n $_out| awk '{avail=NF-2; print $avail}')
     echo -n $_size
 }