trace-view: Add getopt support to gui tools for input file

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
LKML-Reference: <4B3A5AD1.8020001@us.ibm.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 27 insertions, 1 deletions

diff --git a/trace-graph-main.c b/trace-graph-main.c
index 4eb257f..54194e1 100644
--- a/trace-graph-main.c
+++ b/trace-graph-main.c
@@ -1,4 +1,7 @@
+#define _GNU_SOURCE
 #include <gtk/gtk.h>
+#include <getopt.h>
+#include <string.h>
 
 #include "trace-cmd.h"
 #include "trace-graph.h"
@@ -7,10 +10,18 @@
 
 #define TRACE_WIDTH     800
 #define TRACE_HEIGHT    600
-#define input_file "trace.dat"
 
+#define default_input_file "trace.dat"
+static char *input_file = default_input_file;
 static struct graph_info *ginfo;
 
+void usage(char *prog)
+{
+        printf("Usage: %s\n", prog);
+        printf("  -h    Display this help message\n");
+        printf("  -i    input_file, default is %s\n", default_input_file);
+}
+
 /* Callback for the clicked signal of the Exit button */
 static void
 exit_clicked (GtkWidget *widget, gpointer data)
@@ -42,6 +53,21 @@ void trace_graph(int argc, char **argv)
         GtkWidget *sub_item;
         GtkWidget *scrollwin;
         GtkWidget *draw;
+        int c;
+
+        while ((c = getopt(argc, argv, "hi:")) != -1) {
+                switch(c) {
+                case 'h':
+                        usage(basename(argv[0]));
+                        return;
+                case 'i':
+                        input_file = optarg;
+                        break;
+                default:
+                        /* assume the other options are for gtk */
+                        break;
+                }
+        }
 
         handle = tracecmd_open(input_file);