conky/src/user.cc

/*
 *
 * Conky, a system monitor, based on torsmo
 *
 * Any original torsmo code is licensed under the BSD license
 *
 * All code written since the fork of torsmo is licensed under the GPL
 *
 * Please see COPYING for details
 *
 * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
 * Copyright (c) 2005-2021 Brenden Matthews, Philip Kovacs, et. al.
 *   (see AUTHORS)
 * All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <config.h>

#include <grp.h>
#include <pwd.h>
#include <cerrno>
#include <memory>
#include "conky.h"
#include "logging.h"

void print_uid_name(struct text_object *obj, char *p, unsigned int p_max_size) {
  struct passwd *pw;
  uid_t uid;
  char *firstinvalid;
  std::unique_ptr<char[]> objbuf(new char[max_user_text.get(*state)]);

  generate_text_internal(objbuf.get(), max_user_text.get(*state), *obj->sub);

  errno = 0;
  uid = strtol(objbuf.get(), &firstinvalid, 10);
  if (errno == 0 && objbuf.get() != firstinvalid) {
    pw = getpwuid(uid);
    if (pw != nullptr) {
      snprintf(p, p_max_size, "%s", pw->pw_name);
    } else {
      NORM_ERR("The uid %d doesn't exist", uid);
    }
  } else {
    NORM_ERR("$uid_name didn't receive a uid as argument");
  }
}

void print_gid_name(struct text_object *obj, char *p, unsigned int p_max_size) {
  struct group *grp;
  gid_t gid;
  char *firstinvalid;
  std::unique_ptr<char[]> objbuf(new char[max_user_text.get(*state)]);

  generate_text_internal(objbuf.get(), max_user_text.get(*state), *obj->sub);

  errno = 0;
  gid = strtol(objbuf.get(), &firstinvalid, 10);
  if (errno == 0 && objbuf.get() != firstinvalid) {
    grp = getgrgid(gid);
    if (grp != nullptr) {
      snprintf(p, p_max_size, "%s", grp->gr_name);
    } else {
      NORM_ERR("The gid %d doesn't exist", gid);
    }
  } else {
    NORM_ERR("$gid_name didn't receive a gid as argument");
  }
}