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Hi, All As we execute the virsh command and get the return code in my shell script, the code is 141. virsh blockcommit $VM_NAME --path $vm_data_file --base $backing_file --wait rtn_code=$? We get the return code with 141 in script accidentally. And most time we get the code with zero or one. We don't know the reason that the command "virsh blockcommit" return with 141(May be 128 + 13(SIGPIPE)). We refer to http://unix.stackexcha...