contrib/chg/procutil.h

resolve: use the `parentchange` context manager to apply merge action

In an ideal world, we would not have to do that. However, we are miles away from
being ready to not have to do it.

So we add this context manager alongside a long comment. This will help use to
get to the point were have two distinct API with strict rules about when to call
them.

Differential Revision: https://phab.mercurial-scm.org/D11074

/*
 * Utilities about process handling - signal and subprocess (ex. pager)
 *
 * Copyright (c) 2011 Yuya Nishihara <[e-mail]>
 *
 * This software may be used and distributed according to the terms of the
 * GNU General Public License version 2 or any later version.
 */

#ifndef PROCUTIL_H_
#define PROCUTIL_H_

#include <unistd.h>

void restoresignalhandler(void);
void setupsignalhandler(pid_t pid, pid_t pgid);

pid_t setuppager(const char *pagercmd, const char *envp[]);
void waitpager(void);

#endif /* PROCUTIL_H_ */