Add sandman wrapper

Makefile

@@ -40,6 +40,17 @@ install: catgirl catgirl.1
 uninstall:
 	rm -f ${PREFIX}/bin/catgirl ${MANDIR}/man1/catgirl.1.gz
 
+scripts/sandman: scripts/sandman.o
+	${CC} ${LDFLAGS} scripts/sandman.o -framework Cocoa -o $@
+
+install-sandman: scripts/sandman scripts/sandman.1
+	install -d ${PREFIX}/bin ${MANDIR}/man1
+	install scripts/sandman ${PREFIX}/bin
+	gzip -c scripts/sandman.1 > ${MANDIR}/man1/sandman.1.gz
+
+uninstall-sandman:
+	rm -f ${PREFIX}/bin/sandman ${MANDIR}/man1/sandman.1.gz
+
 CHROOT_USER = chat
 CHROOT_GROUP = ${CHROOT_USER}
 

README.7

@@ -99,6 +99,19 @@ For example,
 PKG_CONFIG_PATH=/opt/libressl/lib/pkgconfig ./configure
 .Ed
 .
+.Pp
+The
+.Nm sandman
+wrapper is provided for macOS
+to stop and start
+.Nm
+on system sleep and wake.
+Install it as follows:
+.Bd -literal -offset indent
+make scripts/sandman
+sudo make install-sandman
+.Ed
+.
 .Sh FILES
 .Bl -tag -width "complete.c" -compact
 .It Pa chat.h
@@ -127,6 +140,8 @@ XDG base directories
 .
 .Pp
 .Bl -tag -width "scripts/notify-send.scpt" -compact
+.It Pa scripts/sandman.m
+sleep/wake wrapper for macOS
 .It Pa scripts/notify-send.scpt
 .Xr notify-send 1
 in AppleScript

scripts/.gitignore

@@ -0,0 +1 @@
+sandman

scripts/sandman.1

@@ -0,0 +1,36 @@
+.Dd February 12, 2020
+.Dt SANDMAN 1
+.Os
+.
+.Sh NAME
+.Nm sandman
+.Nd sleep wrapper
+.
+.Sh SYNOPSIS
+.Nm
+.Op Fl t Ar secs
+.Ar command ...
+.
+.Sh DESCRIPTION
+The
+.Nm
+utility wraps a
+.Ar command ,
+sending it
+.Dv SIGHUP
+when the system goes to sleep,
+and restarting it
+when the system wakes.
+.
+.Pp
+The arguments are as follows:
+.Bl -tag -width Ds
+.It Fl t Ar secs
+Wait for
+.Ar secs
+before restarting the process.
+The default is 8 seconds.
+.El
+.
+.Sh AUTHORS
+.An June Bug Aq Mt june@causal.agency

scripts/sandman.m

@@ -0,0 +1,88 @@
+/* Copyright (C) 2019, 2020  C. McEnroe <june@causal.agency>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#import <Cocoa/Cocoa.h>
+#import <err.h>
+#import <signal.h>
+#import <stdio.h>
+#import <stdlib.h>
+#import <sysexits.h>
+#import <unistd.h>
+
+typedef unsigned uint;
+
+static pid_t pid;
+static void spawn(char *argv[]) {
+	pid = fork();
+	if (pid < 0) err(EX_OSERR, "fork");
+	if (pid) return;
+	execvp(argv[0], argv);
+	err(EX_CONFIG, "%s", argv[0]);
+}
+
+static void handler(int signal) {
+	(void)signal;
+	int status;
+	pid_t pid = wait(&status);
+	if (pid < 0) _exit(EX_OSERR);
+	_exit(status);
+}
+
+int main(int argc, char *argv[]) {
+	uint delay = 8;
+
+	int opt;
+	while (0 < (opt = getopt(argc, argv, "t:"))) {
+		switch (opt) {
+			break; case 't': delay = strtoul(optarg, NULL, 10);
+			break; default:  return EX_USAGE;
+		}
+	}
+	argc -= optind;
+	argv += optind;
+	if (!argc) errx(EX_USAGE, "command required");
+
+	NSWorkspace *workspace = [NSWorkspace sharedWorkspace];
+	NSNotificationCenter *notifCenter = [workspace notificationCenter];
+
+	[notifCenter addObserverForName:NSWorkspaceWillSleepNotification
+							 object:nil
+							  queue:nil
+						 usingBlock:^(NSNotification *notif) {
+							 (void)notif;
+							 signal(SIGCHLD, SIG_IGN);
+							 int error = kill(pid, SIGHUP);
+							 if (error) err(EX_UNAVAILABLE, "kill");
+							 int status;
+							 wait(&status);
+						 }];
+
+	[notifCenter addObserverForName:NSWorkspaceDidWakeNotification
+							 object:nil
+							  queue:nil
+						 usingBlock:^(NSNotification *notif) {
+							 (void)notif;
+							 warnx("waiting %u seconds...", delay);
+							 sleep(delay);
+							 signal(SIGCHLD, handler);
+							 spawn(argv);
+						 }];
+
+	signal(SIGCHLD, handler);
+	spawn(argv);
+
+	[[NSApplication sharedApplication] run];
+}