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ssh: use ssh -n to redirect stdin from /dev/null 

When we're parsing kdump.conf, we read it from stdin in a while
loop statement. If we don't use ssh -n within the loop, all rest of the
kdump.conf options, which are in stdin, will be eaten by ssh.

Signed-off-by: WANG Chao <chaowang@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
WANG Chao 2013-12-24 17:37:01 +08:00
parent 0e90b05d96
commit cdde81ddbd
1 changed files with 4 additions and 2 deletions
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mkdumprd
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@ -134,6 +134,7 @@ is_readonly_mount() {
#Function: get_ssh_size
#$1=dump target
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
get_ssh_size() {
local _opt _out _size
_opt="-i $SSH_KEY_LOCATION -o BatchMode=yes -o StrictHostKeyChecking=yes"
@ -149,11 +150,12 @@ get_ssh_size() {
#mkdir if save path does not exist on ssh dump target
#$1=ssh dump target
#caller should ensure write permission on $DUMP_TARGET:$SAVE_PATH
#called from while loop and shouldn't read from stdin, so we're using "ssh -n"
mkdir_save_path_ssh()
{
local _opt _dir
_opt="-i $SSH_KEY_LOCATION -o BatchMode=yes -o StrictHostKeyChecking=yes"
ssh -q $_opt $1 mkdir -p $SAVE_PATH 2>&1 > /dev/null
ssh -qn $_opt $1 mkdir -p $SAVE_PATH 2>&1 > /dev/null
_ret=$?
if [ $_ret -ne 0 ]; then
perror_exit "mkdir failed on $DUMP_TARGET:$SAVE_PATH"
@ -165,7 +167,7 @@ mkdir_save_path_ssh()
if [ $_ret -ne 0 ]; then
perror_exit "Could not create temporary directory on $DUMP_TARGET:$SAVE_PATH. Make sure user has write permission on destination"
fi
ssh -q $_opt $1 rmdir $_dir
ssh -qn $_opt $1 rmdir $_dir
return 0
}