Minor beauty: use execvp() instead of execv(). (cherry picked from commit 4fdd9e69fac93f6a5912dfafb3d3591f9bce0445)
Minor beauty: use execvp() instead of execv().
(cherry picked from commit 4fdd9e69fac93f6a5912dfafb3d3591f9bce0445)

rburchell/ck,rburchell/ck,rburchell/ck,rburchell/ck,rburchell/ck