add clean quiting and timeout

Signed-off-by: Mattias Andrée <maandree@operamail.com>

3 files changed, 113 insertions, 1 deletions

diff --git a/src/cerberus.c b/src/cerberus.c
index b27b3da..f61f56a 100644
--- a/src/cerberus.c
+++ b/src/cerberus.c
@@ -20,8 +20,16 @@
 #include <unistd.h>
 
 #include "passphrase.h"
+#include "quit.h"
 
 
+/* The number of seconds before the program times out */
+#ifndef TIMEOUT_SECONDS
+#define TIMEOUT_SECONDS  60
+#endif
+
+
+/* Free if declared */
 #define xfree(VAR)  ({ if (VAR)  free(VAR); })
 
 
@@ -102,11 +110,28 @@ int main(int argc, char** argv)
   }
   
   
-  /* Get the passphrase, if -f has not been used */
+  /* Print ant we want a passphrase, if -f has not been used */
   if (skip_auth == 0)
     {
       printf("Passphrase: ");
       fflush(stdout);
+    }
+  /* Done early to make to program look like it is even faster than it is */
+  
+  
+  /* Set up clean quiting and time out */
+  signal(SIGALRM, timeout_quit);
+  signal(SIGQUIT, user_quit);
+  signal(SIGINT, user_quit);
+  siginterrupt(SIGALM, 1);
+  siginterrupt(SIGQUIT, 1);
+  siginterrupt(SIGINT, 1);
+  alarm(TIMEOUT_SECONDS);
+  
+  
+  /* Get the passphrase, if -f has not been used */
+  if (skip_auth == 0)
+    {
       passphrase = get_passphrase();
       printf("\n");
     }
diff --git a/src/quit.c b/src/quit.c
new file mode 100644
index 0000000..3a0911d
--- /dev/null
+++ b/src/quit.c
@@ -0,0 +1,48 @@
+/**
+ * cerberus – Minimal login program
+ * 
+ * Copyright © 2013  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+#include "quit.h"
+
+
+/**
+ * Quit function for timeout
+ * 
+ * @param  signal  The signal the program received
+ */
+void timeout_quit(int signal)
+{
+  (void) signal;
+  printf("\nTimed out.\n");
+  reenable_echo();
+  _exit(10);
+}
+
+
+/**
+ * Quit function for user aborts
+ * 
+ * @param  signal  The signal the program received
+ */
+void user_quit(int signal)
+{
+  (void) signal;
+  printf("\n");
+  reenable_echo();
+  _exit(130);
+}
+
diff --git a/src/quit.h b/src/quit.h
new file mode 100644
index 0000000..93eb799
--- /dev/null
+++ b/src/quit.h
@@ -0,0 +1,39 @@
+/**
+ * cerberus – Minimal login program
+ * 
+ * Copyright © 2013  Mattias Andrée (maandree@member.fsf.org)
+ * 
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+#include <stdio.h>
+#include <unistd.h>
+
+#include "passphrase.h"
+
+
+/**
+ * Quit function for timeout
+ * 
+ * @param  signal  The signal the program received
+ */
+void timeout_quit(int signal);
+
+
+/**
+ * Quit function for user aborts
+ * 
+ * @param  signal  The signal the program received
+ */
+void user_quit(int signal);
+