Spawn a shell if no command is specified.

Instead of requiring the user to always specifying a command to launch,
default to spawning a shell (/bin/sh) if no command has been specified.

pm-inhibit.cpp

@@ -88,8 +88,10 @@ parseCommandLine(InhibitAction *action)
                     "(defaults to \"%1\").").arg(action->reason), "reason");
     parser.addOption(reasonOption);
 
-    parser.addPositionalArgument("command", "The command to run",
-            "command...");
+    parser.addPositionalArgument("command",
+            QString("The command to run "
+                    "(defaults to \"%1\")").arg(action->command),
+            "[command...]");
 
     if ( ! parser.parse(QCoreApplication::arguments()) )
         die(1, parser.errorText());
@@ -107,12 +109,10 @@ parseCommandLine(InhibitAction *action)
         action->reason = parser.value(reasonOption);
 
     QStringList args = parser.positionalArguments();
-    if ( args.size() > 1 ) {
+    if ( args.size() > 0 ) {
         action->command = args.at(0);
         action->arguments = args.mid(1);
     }
-    else
-        die(1, "No command to run");
 }
 
 int
@@ -121,7 +121,8 @@ main(int argc, char **argv)
     QCoreApplication app(argc, argv);
     app.setApplicationName("pm-inhibit");
     app.setApplicationVersion(VERSION);
-    InhibitAction action = { "pm-inhibit", "Per user request." };
+    InhibitAction action = { "pm-inhibit", "Per user request.", "/bin/sh",
+                             QStringList() };
 
     parseCommandLine(&action);
 
@@ -130,6 +131,8 @@ main(int argc, char **argv)
         die(1, "Cannot inhibit power management features");
 
     QProcess process;
+    process.setInputChannelMode(QProcess::ForwardedInputChannel);
+    process.setProcessChannelMode(QProcess::ForwardedChannels);
     process.start(action.command, action.arguments);
     process.waitForFinished(-1);