switch to execvp, as system() does its own fork and can cause process to detach completely if parent process dies
switch to execvp, as system() does its own fork and can cause process to detach completely if parent process dies


git-svn-id: 3ad904ec35b89a071badd9cb0113dfe58093e920@677 726aef4b-f618-498e-8847-2d620e286838

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