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/*
* utils.h
* potd is licensed under the BSD license:
*
* Copyright (c) 2018 Toni Uhlig <matzeton@googlemail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - The names of its contributors may not be used to endorse or promote
* products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef POTD_UTILS_H
#define POTD_UTILS_H 1
#include <stdlib.h>
#include <sys/types.h>
#include <netdb.h>
#ifndef SIZEOF
#define SIZEOF(arr) (sizeof(arr)/sizeof(arr[0]))
#endif
#define MIN(x, y) (x > y ? y : x)
extern char *arg0;
int set_fd_nonblock(int fd);
int set_child_sighandler(void);
int set_master_sighandler(void);
void set_procname(const char *new_arg0);
pid_t daemonize(int stay_foreground);
int close_fds_except(int fd, ...);
int redirect_devnull_to(int fds, ...);
int change_user_group(const char *user, const char *group);
int change_default_user_group(void);
int safe_chroot(const char *newroot);
void mkdir_attr(const char *fname, mode_t mode, uid_t uid, gid_t gid);
int is_dir(const char *fname);
int is_link(const char *fname);
int path_is_mountpoint(const char *path);
void chk_chroot(void);
void mount_root(void);
int mount_dev(const char *mount_path);
int mount_pts(const char *mount_path);
int setup_network_namespace(const char *name);
int switch_network_namespace(const char *name);
int create_device_file_checked(const char *mount_path, const char *device_file,
mode_t mode, int add_mode, dev_t dev);
int create_device_files(const char *mount_path);
int cgroups_set(void);
int cgroups_activate(void);
#if 0
int update_guid_map(pid_t pid, unsigned int uid_map[3], int update_uidmap);
int update_setgroups_self(int allow);
#endif
void escape_ascii_string(const char ascii[], size_t siz,
char **dest, size_t *newsiz);
size_t parse_hostport(const char *str, const char *result[2],
size_t siz[2]);
size_t parse_hostport_str(const char *str, char hbuf[NI_MAXHOST],
char sbuf[NI_MAXSERV]);
int selftest_minimal_requirements(void);
#endif
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