now properly prints out help

main.c

@@ -4,26 +4,33 @@
 #include <getopt.h>
 #include <string.h>
 
-void add_arg(char ***new_argv_ptr, int *new_argc, char *opt_string);
-static void print_help();
+void add_arg(char ***fuse_argv_ptr, int *fuse_argc, char *opt_string);
+static void print_help(char *program_name);
 
 /**
  * \brief add an argument to an argv array
  * \details This is basically how you add a string to an array of string
  */
-void add_arg(char ***new_argv_ptr, int *new_argc, char *opt_string)
+void add_arg(char ***fuse_argv_ptr, int *fuse_argc, char *opt_string)
 {
-    (*new_argc)++;
-    *new_argv_ptr = realloc(*new_argv_ptr, *new_argc * sizeof(char *));
-    char **new_argv = *new_argv_ptr;
-    new_argv[*new_argc - 1] = opt_string;
+    (*fuse_argc)++;
+    *fuse_argv_ptr = realloc(*fuse_argv_ptr, *fuse_argc * sizeof(char *));
+    char **fuse_argv = *fuse_argv_ptr;
+    fuse_argv[*fuse_argc - 1] = opt_string;
 }
 
 int main(int argc, char **argv)
 {
+    char **fuse_argv = NULL;
+    int fuse_argc = 0;
 
-    char **new_argv = NULL;
-    int new_argc = 0;
+    /* Add the program's name to the fuse argument */
+    add_arg(&fuse_argv, &fuse_argc, argv[0]);
+    /* Automatically print help if not enough arguments are supplied */
+    if (argc < 2) {
+        add_arg(&fuse_argv, &fuse_argc, "--help");
+        goto fuse_start;
+    }
 
     char c;
     int opts_index = 0;
@@ -39,52 +46,53 @@ int main(int argc, char **argv)
                     &opts_index)) != -1) {
         switch (c) {
             case 'o':
-                add_arg(&new_argv, &new_argc, " -o ");
-                add_arg(&new_argv, &new_argc, optarg);
+                add_arg(&fuse_argv, &fuse_argc, "-o");
+                add_arg(&fuse_argv, &fuse_argc, optarg);
                 break;
             case 'h':
-                print_help();
-                add_arg(&new_argv, &new_argc, " -h ");
+                print_help(argv[0]);
+                add_arg(&fuse_argv, &fuse_argc, "-h");
                 goto fuse_start;
                 break;
             case 'V':
-                add_arg(&new_argv, &new_argc, " -V ");
+                add_arg(&fuse_argv, &fuse_argc, "-V");
                 break;
             case 'd':
-                add_arg(&new_argv, &new_argc, " -d ");
+                add_arg(&fuse_argv, &fuse_argc, "-d");
                 break;
             case 'f':
-                add_arg(&new_argv, &new_argc, " -f ");
+                add_arg(&fuse_argv, &fuse_argc, "-f");
                 break;
             case 's':
-                add_arg(&new_argv, &new_argc, " -s");
+                add_arg(&fuse_argv, &fuse_argc, "-s");
                 break;
             case '?':
                 exit(EXIT_FAILURE);
         }
     };
 
+    /* Add the last remaining argument, which is the mount point */
+    add_arg(&fuse_argv, &fuse_argc, argv[argc-1]);
+
     /* The second last remaining argument is the URL */
     char *base_url = argv[argc-2];
     if (strncmp(base_url, "http://", 7) && strncmp(base_url, "https://", 8)) {
-        fprintf(stderr, "Please supply a valid URL.\n");
-        print_help();
+        fprintf(stderr, "Error: Please supply a valid URL.\n");
+        print_help(argv[0]);
         exit(EXIT_FAILURE);
+    } else {
+        network_init(base_url);
     }
-    network_init(base_url);
-
-    /* The last remaining argument is the mount point */
-    add_arg(&new_argv, &new_argc, argv[argc-1]);
 
     fuse_start:
-    fuse_local_init(new_argc, new_argv);
+    fuse_local_init(fuse_argc, fuse_argv);
 
     return 0;
 }
 
-static void print_help()
+static void print_help(char *program_name)
 {
     fprintf(stderr,
-            "usage: mount-http-dir [options] URL mount_point\n");
+            "Usage: %s [options] URL mount_point\n", program_name);
 }