guestfs-inspect/libguestfs-inspect.h

#include <czmq.h>

enum guestfs_inspect_command_const {
  GUESTFS_COMMAND_LS,
  /* GUESTFS_COMMAND_TOUCH, */
  /* GUESTFS_COMMAND_MKDIR, */
  GUESTFS_COMMAND_CAT
};

struct guestfs_ls_args {
  size_t paths_length;
  char **paths;
};
struct guestfs_cat_args {};

struct guestfs_inpsect_command {
  char *name;
  enum guestfs_inspect_command_const command;
  union {
    struct guestfs_ls_args ls;
    struct guestfs_cat_args cat;
  } args;
};

static char *endpoint() {
  // TODO: This should be based on GUESTFS_INSPECT_ENDPOINT, or XDG_RUNTIME_DIR if the former is not set, and default to a sensible path if neither are set.
  const char* ep = "ipc:///tmp/guestfs-inspect.sock";
  char *res = malloc(strlen(ep) + 1);
  strcpy(res, ep);
  return res;
}

static zmsg_t *command_to_zmsg(struct guestfs_inpsect_command *command) {
  zmsg_t *res = zmsg_new();

  zmsg_addstr(res, command->name);
  zmsg_addmem(res, &(command->command), sizeof(command->command));

  switch (command->command) {
  case GUESTFS_COMMAND_LS:
    zmsg_addmem(res, &(command->args.ls.paths_length), sizeof(command->args.ls.paths_length));

    for (size_t i = 0; i < (command->args.ls.paths_length); i++) {
      zmsg_addstr(res, command->args.ls.paths[i]);
    }
    break;
  }

  return res;
}

static struct guestfs_inpsect_command *zmsg_to_command(zmsg_t *msg) {
  struct guestfs_inpsect_command *res = malloc(sizeof(struct guestfs_inpsect_command));

  res->name = zmsg_popstr(msg);
  zframe_t *next = zmsg_pop(msg);
  res->command = *(zframe_data(next));
  free(next);
  
  switch (res->command) {
  case GUESTFS_COMMAND_LS:
    next = zmsg_pop(msg);
    res->args.ls.paths_length = *(zframe_data(next));
    free(next);

    res->args.ls.paths = calloc(res->args.ls.paths_length, sizeof(char *));

    for (size_t i = 0; i < res->args.ls.paths_length; i++) {
      res->args.ls.paths[i] = zmsg_popstr(msg);
    }
    break;
  }
  return res;
}