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#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, plugin->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)
{
char *str = argv[0];
char use[0x100];
struct plugin *extension;
struct program *prog = plugin->parent;
struct command **cmd = plugin->commands;
struct command *cr = NULL;
bool cr_valid = false;
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);
while (*cmd) {
if (!strcmp(str, (*cmd)->name) ||
((*cmd)->alias && !strcmp(str, (*cmd)->alias)))
return (*cmd)->fn(argc, argv, *cmd, plugin);
if (!strncmp(str, (*cmd)->name, strlen(str))) {
if (cr) {
cr_valid = false;
} else {
cr = *cmd;
cr_valid = true;
}
}
cmd++;
}
if (cr && cr_valid) {
sprintf(use, "%s %s <device> [OPTIONS]", prog->name, cr->name);
argconfig_append_usage(use);
return cr->fn(argc, argv, cr, 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;
}
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