contrib/chg/chg.c

29428:247ea0dfdb94

		unlink(resolvedpath);
		free(resolvedpath);
	}
}

static pid_t peerpid = 0;

static void forwardsignal(int sig)
{
	assert(peerpid > 0);

		goto error;
	return;

error:
	abortmsgerrno("failed to handle stop signal");
}

static void setupsignalhandler(pid_t pid)
{
	if (pid <= 0)

		goto error;
	sa.sa_handler = handlestopsignal;
	sa.sa_flags = SA_RESTART;
	if (sigaction(SIGTSTP, &sa, NULL) < 0)
		goto error;

	return;

error:
	abortmsgerrno("failed to set up signal handlers");

	if (sigaction(SIGWINCH, &sa, NULL) < 0)
		goto error;
	if (sigaction(SIGCONT, &sa, NULL) < 0)
		goto error;
	if (sigaction(SIGTSTP, &sa, NULL) < 0)
		goto error;

	/* ignore Ctrl+C while shutting down to make pager exits cleanly */
	sa.sa_handler = SIG_IGN;
	if (sigaction(SIGINT, &sa, NULL) < 0)

				 "wrapper, wrap chg instead of hg.",
				 gethgcmd());
	}

	setupsignalhandler(hgc_peerpid(hgc));
	pid_t pagerpid = setuppager(hgc, argv + 1, argc - 1);
	int exitcode = hgc_runcommand(hgc, argv + 1, argc - 1);
	restoresignalhandler();
	hgc_close(hgc);
	freecmdserveropts(&opts);
	if (pagerpid)

29429:cf99de051385

		unlink(resolvedpath);
		free(resolvedpath);
	}
}

static pid_t pagerpid = 0;
static pid_t peerpid = 0;

static void forwardsignal(int sig)
{
	assert(peerpid > 0);

		goto error;
	return;

error:
	abortmsgerrno("failed to handle stop signal");
}

static void handlechildsignal(int sig)
{
	if (peerpid == 0 || pagerpid == 0)
		return;
	/* if pager exits, notify the server with SIGPIPE immediately.
	 * otherwise the server won't get SIGPIPE if it does not write
	 * anything. (issue5278) */
	if (waitpid(pagerpid, NULL, WNOHANG) == pagerpid)
		kill(peerpid, SIGPIPE);
}

static void setupsignalhandler(pid_t pid)
{
	if (pid <= 0)

		goto error;
	sa.sa_handler = handlestopsignal;
	sa.sa_flags = SA_RESTART;
	if (sigaction(SIGTSTP, &sa, NULL) < 0)
		goto error;
	/* get notified when pager exits */
	sa.sa_handler = handlechildsignal;
	sa.sa_flags = SA_RESTART;
	if (sigaction(SIGCHLD, &sa, NULL) < 0)
		goto error;

	return;

error:
	abortmsgerrno("failed to set up signal handlers");

	if (sigaction(SIGWINCH, &sa, NULL) < 0)
		goto error;
	if (sigaction(SIGCONT, &sa, NULL) < 0)
		goto error;
	if (sigaction(SIGTSTP, &sa, NULL) < 0)
		goto error;
	if (sigaction(SIGCHLD, &sa, NULL) < 0)
		goto error;

	/* ignore Ctrl+C while shutting down to make pager exits cleanly */
	sa.sa_handler = SIG_IGN;
	if (sigaction(SIGINT, &sa, NULL) < 0)

				 "wrapper, wrap chg instead of hg.",
				 gethgcmd());
	}

	setupsignalhandler(hgc_peerpid(hgc));
	pagerpid = setuppager(hgc, argv + 1, argc - 1);
	int exitcode = hgc_runcommand(hgc, argv + 1, argc - 1);
	restoresignalhandler();
	hgc_close(hgc);
	freecmdserveropts(&opts);
	if (pagerpid)