Changes in uspace/app/bdsh/cmds/modules/help/help.c [19f857a:4deb8b5] in mainline

File:

• uspace/app/bdsh/cmds/modules/help/help.c (modified) (4 diffs)

uspace/app/bdsh/cmds/modules/help/help.c

@@ -45 +45 @@
 extern const char *progname;
 
-#define HELP_IS_MODULE   1
-#define HELP_IS_BUILTIN  0
-#define HELP_IS_RUBBISH  -1
+#define HELP_IS_COMMANDS        2
+#define HELP_IS_MODULE          1
+#define HELP_IS_BUILTIN         0
+#define HELP_IS_RUBBISH         -1
 
 volatile int mod_switch = -1;
@@ -55 +56 @@
 {
         int rc = HELP_IS_RUBBISH;
+
+        if (str_cmp(cmd, "commands") == 0)
+                return HELP_IS_COMMANDS;
 
         rc = is_builtin(cmd);
@@ -90 +94 @@
 }
 
-int cmd_help(char *argv[])
+static void help_commands(void)
 {
+        builtin_t *cmd;
         module_t *mod;
-        builtin_t *cmd;
-        unsigned int i = 0;
-        int rc = 0;
-        int argc;
-        int level = HELP_SHORT;
+        unsigned int i;
 
-        argc = cli_count_args(argv);
-
-        if (argc > 3) {
-                printf("\nToo many arguments to `%s', try:\n", cmdname);
-                help_cmd_help(HELP_SHORT);
-                return CMD_FAILURE;
-        }
-
-        if (argc == 3) {
-                if (!str_cmp("extended", argv[2]))
-                        level = HELP_LONG;
-                else
-                        level = HELP_SHORT;
-        }
-
-        if (argc > 1) {
-                rc = is_mod_or_builtin(argv[1]);
-                switch (rc) {
-                case HELP_IS_RUBBISH:
-                        printf("Invalid command %s\n", argv[1]);
-                        return CMD_FAILURE;
-                case HELP_IS_MODULE:
-                        help_module(mod_switch, level);
-                        return CMD_SUCCESS;
-                case HELP_IS_BUILTIN:
-                        help_builtin(mod_switch, level);
-                        return CMD_SUCCESS;
-                }
-        }
-
-        printf("\n  Available commands are:\n");
+        printf("\n  Bdsh built-in commands:\n");
         printf("  ------------------------------------------------------------\n");
 
@@ -154 +125 @@
         printf("\n  Try %s %s for more information on how `%s' works.\n\n",
                 cmdname, cmdname, cmdname);
+}
+
+/** Display survival tips. ('help' without arguments) */
+static void help_survival(void)
+{
+        printf("Don't panic!\n\n");
+
+        printf("This is Bdsh, the Brain dead shell, currently "
+            "the primary user interface to HelenOS. Bdsh allows you to enter "
+            "commands and supports history (Up, Down arrow keys), "
+            "line editing (Left Arrow, Right Arrow, Home, End, Backspace), "
+            "selection (Shift + movement keys), copy and paste (Ctrl-C, "
+            "Ctrl-V), similar to common desktop environments.\n\n");
+
+        printf("The most basic filesystem commands are Bdsh builtins. Type "
+            "'help commands' [Enter] to see the list of Bdsh builtin commands. "
+            "Other commands are external executables located in the /app and "
+            "/srv directories. Type 'ls /app' [Enter] and 'ls /srv' [Enter] "
+            "to see their list. You can execute an external command simply "
+            "by entering its name (e.g. type 'tetris' [Enter]).\n\n");
+
+        printf("HelenOS has virtual consoles (VCs). You can switch between "
+            "these using the F1-F11 keys.\n\n");
+
+        printf("This is but a small glimpse of what you can do with HelenOS. "
+            "To learn more please point your browser to the HelenOS User's "
+            "Guide: http://trac.helenos.org/trac.fcgi/wiki/UsersGuide\n\n");
+}
+
+int cmd_help(char *argv[])
+{
+        int rc = 0;
+        int argc;
+        int level = HELP_SHORT;
+
+        argc = cli_count_args(argv);
+
+        if (argc > 3) {
+                printf("\nToo many arguments to `%s', try:\n", cmdname);
+                help_cmd_help(HELP_SHORT);
+                return CMD_FAILURE;
+        }
+
+        if (argc == 3) {
+                if (!str_cmp("extended", argv[2]))
+                        level = HELP_LONG;
+                else
+                        level = HELP_SHORT;
+        }
+
+        if (argc > 1) {
+                rc = is_mod_or_builtin(argv[1]);
+                switch (rc) {
+                case HELP_IS_RUBBISH:
+                        printf("Invalid topic %s\n", argv[1]);
+                        return CMD_FAILURE;
+                case HELP_IS_COMMANDS:
+                        help_commands();
+                        return CMD_SUCCESS;
+                case HELP_IS_MODULE:
+                        help_module(mod_switch, level);
+                        return CMD_SUCCESS;
+                case HELP_IS_BUILTIN:
+                        help_builtin(mod_switch, level);
+                        return CMD_SUCCESS;
+                }
+        }
+
+        help_survival();
 
         return CMD_SUCCESS;