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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* Copyright (C) 2018 - David Oberhollenzer
*
* 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 <https://www.gnu.org/licenses/>.
*/
#ifndef UTIL_H
#define UTIL_H
#include <sys/types.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include "config.h"
#ifdef __GNUC__
#define NORETURN __attribute__((noreturn))
#endif
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
typedef struct {
const char *name;
int value;
} enum_map_t;
typedef struct exec_t {
struct exec_t *next;
int argc; /* number of elements in argument vector */
char args[]; /* argument vectot string blob */
} exec_t;
enum {
/* only allow root to connect */
SOCK_FLAG_ROOT_ONLY = 0x01,
/* allow everyone to connect */
SOCK_FLAG_EVERYONE = 0x02,
/* create a datagram socket, otherwise use a stream socket */
SOCK_FLAG_DGRAM = 0x04,
};
/*
Search through an array of enum_map_t entries to resolve a string to
a numeric value. The end of the map is indicated by a sentinel entry
with the name set to NULL.
*/
const enum_map_t *enum_by_name(const enum_map_t *map, const char *name);
/*
Search through an array of enum_map_t entries to resolve a numeric
value to a string name. The end of the map is indicated by a sentinel
entry with the name set to NULL.
*/
const char *enum_to_name(const enum_map_t *map, int value);
/*
Create a UNIX stream socket at the given path.
Returns the socket fd, -1 on failure. The function takes care of
printing error messages on failure.
The socket has the CLOEXEC flag set.
*/
int mksock(const char *path, int flags);
/* print a default version info and license string */
NORETURN void print_version(const char *program);
int setup_tty(const char *tty, bool truncate);
NORETURN void argv_exec(exec_t *e);
/*
Similar to openat: opens a file relative to a dirfd, but returns
a FILE pointer instead of an fd.
*/
FILE *fopenat(int fd, const char *filename, const char *mode);
#endif /* UTIL_H */
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