Adding upstream version 1.12.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugin.c

@@ -0,0 +1,188 @@
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "plugin.h"
+#include "util/argconfig.h"
+
+static int version(struct plugin *plugin)
+{
+	struct program *prog = plugin->parent;
+
+	if (plugin->name)
+		printf("%s %s version %s\n", prog->name, plugin->name, prog->version);
+	else
+		printf("%s version %s\n", prog->name, prog->version);
+	return 0;
+}
+
+static int help(int argc, char **argv, struct plugin *plugin)
+{
+	char man[0x100];
+	struct program *prog = plugin->parent;
+	char *str = argv[1];
+	int i;
+
+	if (argc == 1) {
+		general_help(plugin);
+		return 0;
+	}
+
+	for (i = 0; plugin->commands[i]; i++) {
+		struct command *cmd = plugin->commands[i];
+
+		if (strcmp(str, cmd->name))
+			if (!cmd->alias || (cmd->alias && strcmp(str, cmd->alias)))
+				continue;
+
+		if (plugin->name)
+			sprintf(man, "%s-%s-%s", prog->name, plugin->name, cmd->name);
+		else
+			sprintf(man, "%s-%s", prog->name, cmd->name);
+		if (execlp("man", "man", man, (char *)NULL))
+			perror(argv[1]);
+	}
+	return 0;
+}
+
+void usage(struct plugin *plugin)
+{
+	struct program *prog = plugin->parent;
+
+	if (plugin->name)
+		printf("usage: %s %s %s\n", prog->name, plugin->name, prog->usage);
+	else
+		printf("usage: %s %s\n", prog->name, prog->usage);
+}
+
+void general_help(struct plugin *plugin)
+{
+	struct program *prog = plugin->parent;
+	struct plugin *extension;
+	unsigned i = 0;
+	unsigned padding = 15;
+	unsigned curr_length = 0;
+	printf("%s-%s\n", prog->name, prog->version);
+
+	usage(plugin);
+
+	printf("\n");
+	print_word_wrapped(prog->desc, 0, 0);
+	printf("\n");
+
+	if (plugin->desc) {
+		printf("\n");
+		print_word_wrapped(plugin->desc, 0, 0);
+		printf("\n");
+	}
+
+	printf("\nThe following are all implemented sub-commands:\n");
+
+	/* iterate through all commands to get maximum length */
+	/* Still need to handle the case of ultra long strings, help messages, etc */
+	for (; plugin->commands[i]; i++)
+		if (padding < (curr_length = 2 + strlen(plugin->commands[i]->name)))
+			padding = curr_length;
+
+	i = 0;
+	for (; plugin->commands[i]; i++)
+		printf("  %-*s %s\n", padding, plugin->commands[i]->name,
+					plugin->commands[i]->help);
+
+	printf("  %-*s %s\n", padding, "version", "Shows the program version");
+	printf("  %-*s %s\n", padding, "help", "Display this help");
+	printf("\n");
+
+	if (plugin->name)
+		printf("See '%s %s help <command>' for more information on a specific command\n",
+			prog->name, plugin->name);
+	else
+		printf("See '%s help <command>' for more information on a specific command\n",
+			prog->name);
+
+	/* The first plugin is the built-in. If we're not showing help for the
+	 * built-in, don't show the program's other extensions */
+	if (plugin->name)
+		return;
+
+	extension = prog->extensions->next;
+	if (!extension)
+		return;
+
+	printf("\nThe following are all installed plugin extensions:\n");
+	while (extension) {
+		printf("  %-*s %s\n", 15, extension->name, extension->desc);
+		extension = extension->next;
+	}
+	printf("\nSee '%s <plugin> help' for more information on a plugin\n",
+			prog->name);
+}
+
+int handle_plugin(int argc, char **argv, struct plugin *plugin)
+{
+	unsigned i = 0;
+	char *str = argv[0];
+	char use[0x100];
+
+	struct plugin *extension;
+	struct program *prog = plugin->parent;
+
+	if (!argc) {
+		general_help(plugin);
+		return 0;
+	}
+
+	if (!plugin->name)
+		sprintf(use, "%s %s <device> [OPTIONS]", prog->name, str);
+	else
+		sprintf(use, "%s %s %s <device> [OPTIONS]", prog->name, plugin->name, str);
+	argconfig_append_usage(use);
+
+	/* translate --help and --version into commands */
+	while (*str == '-')
+		str++;
+
+	if (!strcmp(str, "help"))
+		return help(argc, argv, plugin);
+	if (!strcmp(str, "version"))
+		return version(plugin);
+
+	for (; plugin->commands[i]; i++) {
+		struct command *cmd = plugin->commands[i];
+
+		if (strcmp(str, cmd->name))
+			if (!cmd->alias || (cmd->alias && strcmp(str, cmd->alias)))
+				continue;
+
+		return (cmd->fn(argc, argv, cmd, plugin));
+	}
+
+	/* Check extensions only if this is running the built-in plugin */
+	if (plugin->name) { 
+		printf("ERROR: Invalid sub-command '%s' for plugin %s\n", str, plugin->name);
+		return -ENOTTY;
+        }
+
+	extension = plugin->next;
+	while (extension) {
+		if (!strcmp(str, extension->name))
+			return handle_plugin(argc - 1, &argv[1], extension);
+		extension = extension->next;
+	}
+
+	/* If the command is executed with the extension name and
+	 * command together ("plugin-command"), run the plug in */
+	extension = plugin->next;
+	while (extension) {
+		if (!strncmp(str, extension->name, strlen(extension->name))) {
+			argv[0] += strlen(extension->name);
+			while (*argv[0] == '-')
+				argv[0]++;
+			return handle_plugin(argc, &argv[0], extension);
+		}
+		extension = extension->next;
+	}
+	printf("ERROR: Invalid sub-command '%s'\n", str);
+	return -ENOTTY;
+}