supercop

Basic CLI for supercop
git clone git://git.finwo.net/app/supercop
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list_commands.c (1439B)

      1 #include <stdio.h>
      2 #include <stdlib.h>
      3 #include <string.h>
      4 
      5 #include "cli/command.h"
      6 
      7 static int cmd_list_commands(int argc, const char **argv) {
      8   (void)argc;
      9   (void)argv;
     10 
     11   // Find the longest command name for aligned output
     12   size_t width = 0;
     13   struct cmd_struct *cmd = commands;
     14   while (cmd) {
     15     size_t len = strlen(cmd->display ? cmd->display : cmd->name[0]);
     16     if (len > width) width = len;
     17     cmd = cmd->next;
     18   }
     19 
     20   cmd = commands;
     21   while (cmd) {
     22     printf("  %-*s  %s\n", (int)width,
     23            cmd->display ? cmd->display : cmd->name[0],
     24            cmd->description ? cmd->description : "");
     25     cmd = cmd->next;
     26   }
     27 
     28   return 0;
     29 }
     30 
     31 void __attribute__((constructor)) cmd_list_commands_setup(void) {
     32   struct cmd_struct *cmd = calloc(1, sizeof(struct cmd_struct));
     33   if (!cmd) {
     34     fprintf(stderr, "Failed to allocate memory for list-commands command\n");
     35     return;
     36   }
     37   cmd->next                               = commands;
     38   cmd->fn                                 = cmd_list_commands;
     39   static const char *list_commands_names[] = {"list-commands", NULL};
     40   cmd->name                               = list_commands_names;
     41   cmd->display                            = "list-commands";
     42   cmd->description                        = "List available commands";
     43   cmd->help_text =
     44       "supercop list-commands - List available commands\n"
     45       "\n"
     46       "Usage:\n"
     47       "  supercop list-commands\n";
     48   commands = cmd;
     49 }