From f7cd45464fd7c037f6a60098ae77760998b3b4b6 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 10 May 2019 15:25:43 +0200
Subject: Initial commit

---
 src/warn.c | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/warn.c

(limited to 'src/warn.c')

diff --git a/src/warn.c b/src/warn.c
new file mode 100644
index 0000000..6dfd427
--- /dev/null
+++ b/src/warn.c
@@ -0,0 +1,86 @@
+#include "warn.h"
+#include "util.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+struct action {
+	const char *message;
+	const char *title;
+	int level;
+};
+
+static struct action actions[WARN_ENUM_END] = {
+	[WARN_REBOOT] = {
+		.level = 50,
+		.title = "Neustart des Rechners",
+		.message = 
+		"Dieser PC wird in %02d:%02d neu gestartet. Bitte speichern Sie Ihre Arbeit und beenden Sie die Sitzung.\n\n"
+		"This Computer will reboot in %02d:%02d. Please save your work and end the session."
+	},
+	[WARN_POWEROFF] = {
+		.level = 50,
+		.title = "Herunterfahren des Rechners",
+		.message =
+		"Dieser PC wird in %02d:%02d heruntergefahren. Bitte speichern Sie Ihre Arbeit und beenden Sie die Sitzung.\n\n"
+		"This Computer will power down in %02d:%02d. Please save your work and end the session."
+	},
+	[WARN_LOGOUT] = {
+		.level = 40,
+		.title = "Inaktivität",
+		.message =
+		"Diese Sitzung scheint inaktiv und wird bei weiterer Inaktivität in %02d:%02d beendet.\n\n"
+		"This session seems inactive and will be killed in %02d:%02d if no further activity is detected."
+	},
+	[WARN_LOGOUT_LOW] = {
+		.level = 30,
+		.title = "Inaktivität",
+		.message =
+		"Diese Sitzung scheint inaktiv und wird bei weiterer Inaktivität in %02d:%02d beendet.\n\n"
+		"This session seems inactive and will be killed in %02d:%02d if no further activity is detected."
+	},
+};
+
+void warnUser( struct user *usr, enum Warning what, int seconds )
+{
+	const time_t NOW = now();
+	if ( what < 0 || what >= WARN_ENUM_END )
+		return; // Invalid!
+	struct action *warning = &actions[what];
+	if ( usr->lastWarn + 30 > NOW && warning->level <= usr->lastWarnLevel )
+		return; // Ignore
+	usr->lastWarn = NOW;
+	usr->lastWarnLevel = warning->level;
+	if ( seconds > 60 ) {
+		seconds = ( seconds / 10 ) * 10;
+	}
+	int minutes = seconds / 60;
+	seconds %= 60;
+	char buffer[1000];
+	snprintf( buffer, sizeof(buffer), warning->message, minutes, seconds, minutes, seconds );
+	// Text or X11 warning
+	if ( *usr->display ) {
+		// notify-send
+		if ( doublefork() ) {
+			switchUserSafe( usr->user );
+			setenv( "DISPLAY", usr->display, 1 );
+			if ( usr->xauth[0] != '\0' && usr->xauth[0] != '-' ) {
+				setenv( "XAUTHORITY", usr->xauth, 1 );
+			}
+			run( false, "notify-send", "-t", "15000", warning->title, buffer, (char*)NULL );
+		}
+	} else {
+		// write to device
+		char dev[100];
+		snprintf( dev, sizeof(dev), "/dev/%s", usr->device );
+		FILE *fh = fopen( dev, "w" );
+		if ( fh == NULL )
+			return;
+		fputs( "\n\n****************************\n", fh );
+		fputs( warning->title, fh );
+		fputs( "\n****************************\n", fh );
+		fputs( buffer, fh );
+		fputs( "\n****************************\n\n", fh );
+		fclose( fh );
+	}
+}
+
-- 
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