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95 lines
2.5 KiB
C
95 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* Copyright (C) 2018 - David Oberhollenzer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef UTIL_H
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#define UTIL_H
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#include <sys/types.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include "config.h"
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#ifdef __GNUC__
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#define NORETURN __attribute__((noreturn))
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#endif
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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typedef struct {
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const char *name;
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int value;
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} enum_map_t;
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typedef struct exec_t {
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struct exec_t *next;
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int argc; /* number of elements in argument vector */
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char args[]; /* argument vectot string blob */
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} exec_t;
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enum {
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/* only allow root to connect */
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SOCK_FLAG_ROOT_ONLY = 0x01,
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/* allow everyone to connect */
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SOCK_FLAG_EVERYONE = 0x02,
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/* create a datagram socket, otherwise use a stream socket */
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SOCK_FLAG_DGRAM = 0x04,
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};
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/*
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Search through an array of enum_map_t entries to resolve a string to
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a numeric value. The end of the map is indicated by a sentinel entry
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with the name set to NULL.
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*/
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const enum_map_t *enum_by_name(const enum_map_t *map, const char *name);
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/*
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Search through an array of enum_map_t entries to resolve a numeric
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value to a string name. The end of the map is indicated by a sentinel
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entry with the name set to NULL.
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*/
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const char *enum_to_name(const enum_map_t *map, int value);
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/*
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Create a UNIX stream socket at the given path.
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Returns the socket fd, -1 on failure. The function takes care of
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printing error messages on failure.
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The socket has the CLOEXEC flag set.
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*/
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int mksock(const char *path, int flags);
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/* print a default version info and license string */
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NORETURN void print_version(const char *program);
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int setup_tty(const char *tty, bool truncate);
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NORETURN void argv_exec(exec_t *e);
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/*
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Similar to openat: opens a file relative to a dirfd, but returns
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a FILE pointer instead of an fd.
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*/
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FILE *fopenat(int fd, const char *filename, const char *mode);
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#endif /* UTIL_H */
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