initial commit

1 files changed, 47 insertions, 0 deletions

diff --git a/nullshell.c b/nullshell.c
new file mode 100644
index 0000000..1c14d7c
--- /dev/null
+++ b/nullshell.c
@@ -0,0 +1,47 @@
+/*
+ * (C) 2013 by Christian Hesse <mail@eworm.de>
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * Based on ideas from Sleep Dummy Shell (SleepShell)
+ * by Mario A. Valdez-Ramirez (http://www.mariovaldez.net/)
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define SLEEPTIME 10
+
+int main(int argc, char **argv) {
+	char *ssh_connection, *ssh_client, *ssh_tty;
+
+	/* read environment variables */
+	ssh_connection = getenv("SSH_CONNECTION");
+	ssh_client = getenv("SSH_CLIENT");
+	ssh_tty = getenv("SSH_TTY");
+
+	/* clear the screen */
+	fputs("\033[2J\033[1;1H", stdout);
+	fflush(NULL);
+
+	/* print some info if available */
+	if (ssh_connection != NULL && ssh_client != NULL) {
+		printf("Connection: %s\nClient: %s\n", ssh_connection, ssh_client);
+		if (ssh_tty != NULL)
+			printf("Terminal: %s\n", ssh_tty);
+	}
+
+	/* print an asterisk every SLEEPTIME seconds */
+	while (1) {
+		sleep(SLEEPTIME);
+		putchar('*');
+		fflush(NULL);
+	}
+
+	/* we should never get here.... */
+	return EXIT_SUCCESS;
+}
+
+// vim: set syntax=c: