Added a Makefile to make compilation easy

Author: avinashjoshi

CHANGELOG

@@ -0,0 +1,4 @@
+
+Contact
+==========
+Avinash Joshi, Sandeep Shenoy [axj107420,sxs115220]@utdallas.edu

CHECKLIST

@@ -1,5 +1,6 @@
 To be implemented
 ========================
+o No client-server concept. peer-peer only tutor.c
 o Separate files for TCP and UDP code
 o Can use commands like "JOIN" "STOP" "PATH" etc in client side
 o Write code for path computation

Makefile

@@ -0,0 +1,31 @@
+# Use this Makefile to compile the code
+# Collaborators: Avinash Joshi <[email protected]>
+#                Sandeep Shenoy <[email protected]>
+
+# Use this if pthread is needed to be
+# linked explicit
+C_LINK = -pthread
+
+# Comment the following line while not
+# using the gnu c compiler
+C_ARGS = -Wall
+
+CC = gcc
+
+# No more changes below this line
+
+all: tutor
+
+clean:
+	@echo Removing object files: rm -f *.o
+	@rm -f *.o
+
+cleanall: clean
+	@echo Removing compiled files: rm -f tutor
+	@rm -f tutor
+
+tutor: tutor.o
+	$(CC) -o tutor tutor.o $(C_LINK)
+
+tutor.o: tutor.c
+	$(CC) $(C_ARGS) -c tutor.c

README

@@ -8,3 +8,10 @@ Collaborators: Avinash Joshi <[email protected]>, Sandeep Shenoy <sxs115220
 Using the application
 
 0) Compiling the code
+	make all
+1) Removing object files
+	make clean
+2) Removing all compiled files
+	make cleanall
+
+You may want to have a look at the file Makefile

tutor.c

@@ -53,6 +53,16 @@ int is_number (char * string) {
     return is_num;   
 }
 
+int atoport (char *port_arg) {
+    int port;
+    port = atoi(port_arg);
+    if (!is_number (port_arg) || port < 0) {
+        fprintf (stderr, "%s: %s: invalid port number\n", exec_name, port_arg);
+        exit (EXIT_FAILURE);
+    }
+    return port;
+}
+
 int main (int argc, char **argv) {
 
     /* strrchr gives the last occurance of PATH_SEPARATOR in argv[0] */
@@ -76,18 +86,11 @@ int main (int argc, char **argv) {
         switch (optchar) {
             case 'p':
                 pflag = 1;
-                tport = atoi (optarg);
-                if (!is_number (optarg)) {
-                    fprintf (stderr, "%s: %s: argument to -p must be a number\n", exec_name, optarg);
-                    exit (EXIT_FAILURE);
-                }
-                if (tport < 0) {
-                    fprintf (stderr, "%s: %d: port number must be positive\n", exec_name, tport);
-                    exit (EXIT_FAILURE);
-                }
+                tport = atoport (optarg);
                 break;
             case 'P':
                 Pflag = 1;
+                uport = atoport (optarg);
                 break;
             case 'n':
                 nclients = atoi (optarg);