start_command() followed by finish_command(). Takes a pointer
to a `struct child_process` that specifies the details.
-`run_command_v_opt`, `run_command_v_opt_dir`, `run_command_v_opt_cd_env`::
+`run_command_v_opt`, `run_command_v_opt_cd_env`::
Convenience functions that encapsulate a sequence of
start_command() followed by finish_command(). The argument argv
The caller:
-1. allocates and clears (memset(&chld, '0', sizeof(chld));) a
+1. allocates and clears (memset(&chld, 0, sizeof(chld));) a
struct child_process variable;
2. initializes the members;
3. calls start_command();
The caller:
-1. allocates and clears (memset(&asy, '0', sizeof(asy));) a
+1. allocates and clears (memset(&asy, 0, sizeof(asy));) a
struct async variable;
2. initializes .proc and .data;
3. calls start_async();